In the reaction \[2PbO+C\to 2Pb+C{{O}_{2}}\]:
A)
Lead is getting reduced
done
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B)
Carbon dioxide is getting oxidized
done
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C)
Lead oxide is getting reduced
done
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D)
Carbon is getting reduced
done
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E)
None of these
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Which one of the following is a double displacement reaction?
A)
\[CaO+C{{O}_{2}}\to CaC{{O}_{3}}\]
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B)
\[2Na+2{{H}_{2}}O\to 2NaOH+{{H}_{2}}\]
done
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C)
\[N{{H}_{4}}N{{O}_{2}}\to {{N}_{2}}+2{{H}_{2}}O\]
done
clear
D)
\[CuS{{O}_{4}}+2NaOH\to Cu{{(OH)}_{2}}+N{{a}_{2}}S{{O}_{4}}\]
done
clear
E)
None of these
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A solution turns red litmus blue, its pH is likely to be:
A)
7
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B)
3
done
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C)
5
done
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D)
11
done
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E)
None of these
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Name the acid-base indicator extracted from lichen.
A)
Methyl orange
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B)
Phenolphthalein
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C)
Litmus
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D)
All of these
done
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E)
None of these
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Name to metals which occur in nature in free state as well as in combined state.
A)
Magnesium and Gold
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B)
Copper and Silver
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C)
Silver and Aluminum
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D)
Iron and Nickel
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E)
None of these
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The atomic number of an elements X is 8 and that of elements Y is 12. Write down the symbols of the ions you would expect to be formed from their atoms.
A)
\[{{X}^{2-}},{{Y}^{2+}}\]
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B)
\[{{X}^{2+}},{{Y}^{2-}}\]
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C)
\[{{X}^{2-}},{{Y}^{2-}}\]
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D)
\[{{X}^{2+}},{{Y}^{2+}}\]
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E)
None of these
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What is the structural formula of propanoic acid?
A)
\[H-\underset{H}{\mathop{\underset{|}{\mathop{\overset{H}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\overset{O}{\mathop{\overset{\parallel }{\mathop{C}}\,}}\,-OH\]
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B)
done
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C)
\[H-C\equiv C-\overset{H}{\mathop{\underset{H}{\mathop{\underset{|}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-H\]
done
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D)
\[H-\underset{H}{\mathop{\underset{|}{\mathop{\overset{H}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{\overset{H}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\overset{O}{\mathop{\overset{\parallel }{\mathop{C}}\,}}\,-OH\]
done
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E)
None of these
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The electronic configurations of four elements A, B, C and D are given below. A : 2, 8, 1 B : 2, 8, 7 C : 2, 8, 8 D : 2, 4 Which of the following statements is incorrect?
A)
Element A is a metal.
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B)
Element C is a noble gas.
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C)
Elements A and B will combine to form an ionic bond.
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D)
Elements B and D will combine to form a covalent bond.
done
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E)
None of these
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Give two examples of group 17 elements.
A)
Helium and Neon
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B)
Fluorine and Chlorine
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C)
Sodium and Potassium
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D)
Calcium and Magnesium
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E)
None of these
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What happens to the reactivity of group 1 elements on moving down the group?
A)
Increases
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B)
Decreases
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C)
Remains unchanged
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D)
First decreases then increases
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E)
None of these
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An object 3 cm high is placed at a distance of 8 cm from a concave mirror which produces a virtual image 4.5 cm high. Find the focal length of the mirror.
A)
\[-13\text{ }cm\]
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B)
\[-\,\,20\,\,cm\]
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C)
\[-\,\,24\,\,cm\]
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D)
\[-\,\,35\,\,cm\]
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E)
None of these
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An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position and nature of the image.
A)
Position : 6 cm behind the mirror; Nature: virtual and erect
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B)
Position : 12 cm in front of the mirror; Nature: virtual and erect
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C)
Position : 6 cm behind the mirror; Nature: real and inverted
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D)
Position : 24 cm behind the mirror; Nature: virtual and erect
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E)
Note of these
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An object is placed at a distance of 2 cm from a lens which forms an erect image exactly one- fourth the size of an object. Determine the focal length of the lens.
A)
\[-\,\,23.5\,\,cm\]
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B)
\[-\,\,25.7\,\,cm\]
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C)
\[-\,\,56.7\,\,cm\]
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D)
\[-\,\,64.7\,\,cm\]
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E)
None of these
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Name the scientist who discovered that sunlight consist of seven colors.
A)
Darwin
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B)
Newton
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C)
Rutherford
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D)
Chadwick
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E)
None of these
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An electric bulb draws a current of 0.75 A for 15 minutes. Calculate the amount of electric charge that flows through the circuit.
A)
533 coulombs
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B)
645 coulombs
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C)
575 coulombs
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D)
675 coulombs
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E)
None of these
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When an electric bulb is connected to a 220 V supply line, then a current of 0.50 A flows through it. Calculate the power of the bulb.
A)
110 W
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B)
100 W
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C)
130 W
done
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D)
120 W
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E)
None of these
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Which of the following correctly describes the magnetic field near a long straight wire carrying current?
A)
The field consists of straight lines perpendicular to the wire.
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B)
The field consists of straight lines parallel to the wire.
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C)
The field consists of radial lines originating from the wire.
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D)
The field consists of concentric circles centered on the wire.
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E)
None of these
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A circuit has a fuse of 5 A. What is the maximum number of 40 W (240 V) bulbs that can be safely used in the circuit?
A)
30
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B)
40
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C)
50
done
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D)
70
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E)
None of these
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The main constituent of biogas is
A)
Methane
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B)
carbon dioxide
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C)
Hydrogen
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D)
hydrogen sulphide
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E)
None of these
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In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
A)
Heat energy
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B)
light energy
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C)
Chemical energy
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D)
mechanical energy
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E)
None of these
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The breakdown of pyruvate to give carbon dioxide, water and energy takes place in :
A)
Cytoplasm
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B)
mitochondria
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C)
chloroplast
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D)
nucleus
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E)
None of these
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How many chambers are there in the heart of a fish?
A)
1
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B)
2
done
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C)
3
done
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D)
4
done
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E)
None of these
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Which of the following statements is correct about lymph?
A)
Lymph carries digested fat for the nutritive process
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B)
Lymph protects the body by killing the germs drained out of the body tissues with the help of lymphocytes
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C)
Lymph helps in removing the waste products like fragments of dead cells, etc.
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D)
All of these
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E)
None of these
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Name the three components of a neuron.
A)
Cell body, Dendrites and Axon
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B)
Dendrites, Alveoli, Axon
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C)
Cell body, Bowmen capsule, Axon
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D)
Axon, Ventricles, Atrium
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E)
None of these
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Which is the first enzyme to mix with food in the digestive tract?
A)
Pepsin
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B)
Cellulase
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C)
Amylase
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D)
Trypsin
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E)
None of these
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What are the fine, thread-like structures of bread mould known as?
A)
Rhizopus
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B)
Hyphae
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C)
Sporangia
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D)
Spores
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E)
None of these
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A cross between two individuals results in a ratio of 9 : 3 : 3 : 1 for four possible phenotypes of progeny. This is an example of:
A)
Dihybrid cross
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B)
monohybrid cross
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C)
test-cross
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D)
All of these
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E)
None of these
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Which of the following traits can be passed on to the progeny?
A)
The experience of a person during his lifetime
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B)
The cut tail of a mouse
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C)
The long legs of an animals
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D)
All of these
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E)
None of these
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The decomposers in an ecosystem
A)
Convert inorganic material, to simpler forms
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B)
Convert organic material to inorganic forms
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C)
Convert inorganic materials into organic compounds
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D)
Do not breakdown organic compounds
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E)
None of these
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In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes
A)
Biodiversity in the area
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B)
Monoculture in the area
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C)
Growth of natural forest
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D)
Preserves the natural ecosystem in the area
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E)
None of these
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Directions: are based on the Following information. A, B, C, D, E, F, G, H and I are nine houses. C is 2 km east to B. A is 1 km north to B and H is 2 km south to A. G is 1 km west of H while D is 3 km east of G and F is 2 km north to G. I is situated just in middle of B and C while E is just in middle of H and D. Distance between E and G is:
A)
1 km
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B)
1, 5 km
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C)
2 km
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D)
5 km
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E)
None of these
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Directions: are based on the Following information. A, B, C, D, E, F, G, H and I are nine houses. C is 2 km east to B. A is 1 km north to B and H is 2 km south to A. G is 1 km west of H while D is 3 km east of G and F is 2 km north to G. I is situated just in middle of B and C while E is just in middle of H and D. Distance between E and I is:
A)
1 km
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B)
2 km
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C)
3 km
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D)
4 km
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E)
None of these
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Direction: are based on the following information. \['A\text{ }+\text{ }B'\] means ?A is the son of B' ; \['A\text{ }-\text{ }B'\] means 'A is the wife of B' ; \['A\times B'\] means 'A is the brother of B'; \['A\div B'\]means 'A is the mother of B' and 'A = B' means 'A is the sister of B'. What does \[P+R-Q\] mean?
A)
Q. is the father of P
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B)
Q is the son of P
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C)
Q is the uncle of P
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D)
Q is the brother of P
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E)
None of these
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Direction: are based on the following information. \['A\text{ }+\text{ }B'\] means ?A is the son of B' ; \['A\text{ }-\text{ }B'\] means 'A is the wife of B' ; \['A\times B'\] means 'A is the brother of B'; \['A\div B'\]means 'A is the mother of B' and 'A = B' means 'A is the sister of B'. What does \[P\times R\div Q\] mean?
A)
P is the brother of Q
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B)
P is the father of Q
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C)
P is the maternal uncle of Q
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D)
P is the nephew of Q
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E)
None of these
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In a row of boys, A is fifteenth from the left and B is fourth from the right. There are three boys between A and B. C is just left of A. What is C's position from the right?
A)
9th
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B)
10th
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C)
12th
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D)
13th
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E)
None of these
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If in a certain language, EXECUTIVE is coded as VCVXFGREV, how is ZERO coded in that language?
A)
VIAL
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B)
AVIL
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C)
LIAV
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D)
ALIV
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E)
None of these
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Direction: are based on the following information. P, Q., R, S, T, U, V and W are eight friends sitting around a circle facing towards the centre. (i) W is on the immediate left of P but is not the neighbour of T or S. (ii) U is on the immediate right of Q and V is the neighbour of T. (iii) R is between T and U. Which of the following statements is true?
A)
T is between U and Q
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B)
U is the neighbour of V
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C)
V is between W and T
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D)
W is between P and S
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E)
None of these
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Direction: are based on the following information. P, Q., R, S, T, U, V and W are eight friends sitting around a circle facing towards the centre. (i) W is on the immediate left of P but is not the neighbour of T or S. (ii) U is on the immediate right of Q and V is the neighbour of T. (iii) R is between T and U. What is the position of S?
A)
On the immediate left of Q
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B)
Second to the right of U
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C)
Between Q and U
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D)
On the immediate left of P
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E)
None of these
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Direction: are based on the following information. P, Q., R, S, T, U, V and W are eight friends sitting around a circle facing towards the centre. (i) W is on the immediate left of P but is not the neighbour of T or S. (ii) U is on the immediate right of Q and V is the neighbour of T. (iii) R is between T and U. What is the position of V?
A)
Second to the left of S
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B)
Third of the right of U
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C)
On the immediate right of W
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D)
Between T and R
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E)
None of these
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Replace the question mark with correct number.
A)
1133
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B)
1244
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C)
1222
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D)
1122
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E)
None of these
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Fill in the blanks with the correct option.
Salt Obtained from
Name of the salt
Formula
Base
Acid
(i)
Magnesium nitrate
\[Mg{{(N{{O}_{3}})}_{2}}\]
A
\[HN{{O}_{3}}\]
(ii)
Potassium sulphate
\[{{K}_{2}}S{{O}_{4}}\]
B
C
(iii)
Calcium nitrate
\[Ca{{(N{{O}_{3}})}_{2}}\]
\[Ca{{(OH)}_{2}}\]
D
A)
\[A:Mg{{(OH)}_{2}},\,\,B:KOH,\,\,C:{{H}_{2}}S{{O}_{4}},\,\,D:HN{{O}_{3}}\]
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B)
\[A:MgO,\,\,B:KOH,\,\,C:{{H}_{2}}S{{O}_{4}},\,\,D:HN{{O}_{3}}\]
done
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C)
\[A:Mg{{(OH)}_{2}},\,\,B:{{K}_{2}}S{{O}_{4}},\,\,C:{{H}_{2}}S{{O}_{4}},\,\,D:HN{{O}_{3}}\]
done
clear
D)
\[A:Mg{{H}_{2}},\,\,B:KOH,\,\,C:{{H}_{2}}S{{O}_{4}},\,\,D:HN{{O}_{3}}\]
done
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E)
None of these
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Which one of the following statements is correct? (i) Cyclohexane is a saturated cyclic hydro- carbon. (ii) The general formula of alkyne\[{{C}_{n}}{{H}_{2n-1}}\]. (iii) The common name of ethane is acetylene. (iv) Ethane is an unsaturated hydrocarbon. (v) The common name of ethane is propylene.
A)
(i) and (ii)
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B)
(ii),(iii) and (v)
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C)
(i), (iii) and (iv)
done
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D)
(ii) and (iv)
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E)
None of these
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Which one of the following statements is correct? (i) Modern periodic table is based on atomic masses of elements. (ii) 6th period of the modern periodic table contains 32 elements. (iii) The valence cells of all the noble gases are completely filled with electrons. (iv) The elements in a group of a modern periodic table have consecutive atomic numbers. (v) Elements having 3 valance electrons are placed in group 3 in the modern periodic table.
A)
(i) and (ii)
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B)
(ii) and (iii)
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C)
(i), (ii) and (iii)
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D)
(iii), (iv) and (v)
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E)
None of these
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Which of the following are correct structural isomers of butane? (i) (ii) (iii) (iv)
A)
(i) and (iii)
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B)
(ii) and (iv)
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C)
(iii) and (iv)
done
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D)
(i) and (ii)
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E)
None of these
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Which of the following statements is correct? (i) The exchange of materials like oxygen, food, carbon dioxide between the blood and body cells takes place through capillaries. (ii) Veins are very thick walled blood vessels which carry oxygenated blood from all parts the body to heart. (iii) The pulmonary artery carries deoxygenated blood from right ventricles to the lungs. (iv) Left atrium is connected to left ventricle through septum.
A)
(i) and (ii)
done
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B)
(ii) and (iii)
done
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C)
(i) and (iii)
done
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D)
(ii) and (iv)
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E)
None of these
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Match the following.
(A)
Light
(I)
Geotropism
(B)
Gravity
(II)
Thigmotropism
(C)
Chemicals
(III)
Phototropism
(D)
Touch
(IV)
Hydrotropism
(e)
Water
(V)
Chemotropism
A)
A - III, B - I, C - V, D - II, E - IV
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B)
A - IV, B - I, C - V, D - II, E - III
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C)
A - III, B - II, C - V, D - I, E - IV
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D)
A - III, B - I, C - IV, D - II, E - V
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E)
None of these
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Factors responsible for the rapid spread of bread mould on slices of bread are: (i) Large number of spores. (ii) Availability of moisture and nutrients in bread. (iii) Presence of tubular branched hyphae. (iv) Formation of round shaped sporangia.
A)
(i) and (iii)
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B)
(ii) and (iv)
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C)
(i) and (ii)
done
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D)
(iii) and (iv)
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E)
None of these
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Match the following.
Concave mirror of focal length 15 cm
Column A
Column B
(A)
10 cm
(I)
a magnified real image
(B)
20 cm
(II)
a diminished real image
(c)
30 cm
(III)
a magnified virtual image
(D)
35 cm
(IV)
an image of same size as the object
A)
A - III, B - II, C - IV, D - I
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B)
A - II, B - I, C - IV, D - III
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C)
A - I, B - III, C - IV, D - II
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D)
A - III, B - I, C - IV, D - II
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E)
None of these
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Which of the following statements is correct? (i) When current flows through a conductor, it produces a magnetic field around it. (ii) The magnetic field is uniform inside a solenoid. (iii) If a current carrying conductor is suspended in a magnetic field, it experiences a mechanical force. (iv) Using Right-hand thumb rule, we can find the strength of magnetic field produced by a current carrying conductor.
A)
Only (iii)
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B)
(i) and (iv)
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C)
(i), (ii) and (iii)
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D)
all (i), (ii), (iii) and (iv)
done
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E)
None of these
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New species may be formed if (i) DNA undergoes significant changes in germ cells. (ii) Chromosome number changes in the gamete. (iii) There is no change in the genetic material. (iv) Mating does not take place.
A)
(i) and (ii)
done
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B)
(i) and (iii)
done
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C)
(ii), (iii) and (iv)
done
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D)
(i), (ii) and (iii)
done
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E)
None of these
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