Which one of the following chemical reactions is correct?
A)
\[Mg+{{H}_{2}}O\to Mg{{(OH)}_{2}}+{{H}_{2}}\]
done
clear
B)
\[AlC{{l}_{3}}+Ca{{(OH)}_{2}}\to Al{{(OH)}_{3}}+CaC{{l}_{2}}\]
done
clear
C)
\[Al+{{H}_{2}}S{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+{{H}_{2}}\]
done
clear
D)
\[CaC{{O}_{3}}+2HCl\to CaC{{l}_{2}}+{{H}_{2}}O+C{{O}_{2}}\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following changes takes place during the chemical reaction given below? \[N{{a}_{2}}S{{O}_{4}}+BaC{{l}_{2}}\to BaS{{O}_{4}}+2NaCl\]
A)
Colour changes from black to colourless.
done
clear
B)
It evolves heat
done
clear
C)
A white precipitate is formed
done
clear
D)
No change takes places
done
clear
E)
None of these
done
clear
View Answer play_arrow
When lead nitrate is heated, it emits brown fumes. What does brown fumes contain?
A)
Lead oxide
done
clear
B)
Nitrogen dioxide
done
clear
C)
Nitric oxide
done
clear
D)
Lead dioxide
done
clear
E)
None of these
done
clear
View Answer play_arrow
During electrolysis of water, two electrodes, anode and cathode are used. Which gas is collected at 1?
A)
Oxygen
done
clear
B)
Hydrogen
done
clear
C)
Carbon
done
clear
D)
Nitrogen
done
clear
E)
None of these
done
clear
View Answer play_arrow
Name the acid present in apple.
A)
Citric acid
done
clear
B)
Ascorbic acid
done
clear
C)
Malic acid
done
clear
D)
Tartaric acid
done
clear
E)
None of these
done
clear
View Answer play_arrow
Some acids are obtained from the natural sources and some are prepared in laboratory. They are either organic or inorganic. Which one of the following acids is organic acids?
A)
Sulphuric acid
done
clear
B)
Nitric acid
done
clear
C)
Tannic acid
done
clear
D)
Hydrochloric acid
done
clear
E)
None of these
done
clear
View Answer play_arrow
In fire extinguisher the reaction between sulphuric acid and sodium carbonate is used to produce carbon dioxide which helps in extinguishing the fire. Which one of the following represents the sulphuric acid in the fire extinguisher?
A)
1
done
clear
B)
2
done
clear
C)
3
done
clear
D)
4
done
clear
E)
None of these
done
clear
View Answer play_arrow
The basic nature of soap can be tested by using the natural indicators such as turmeric. If we add small amount of turmeric to the soap solution, which one of the following colors change takes place?
A)
Yellow to Reddish Brown
done
clear
B)
Red to Green
done
clear
C)
Green to Colourless
done
clear
D)
Yellow to Blue
done
clear
E)
None of these
done
clear
View Answer play_arrow
When base is heated with an ammonium salt, ammonia gas, another salt and water are produced. Which one of the following helps us to recognize ammonia gas?
A)
Formation of Precipitate of ammonia
done
clear
B)
Evolution of brown fumes
done
clear
C)
Evolution of Pungent Smell of ammonia gas
done
clear
D)
Change of color from red to colourless
done
clear
E)
None of these
done
clear
View Answer play_arrow
One mole of \[Pb{{(OH)}_{2}}\]requires 2 mole of HCI for complete neutralization. But when one mole of \[Pb{{(OH)}_{2}}\]is made to react with one mole of HCI, some of them left unreacted. Which salt is produced during this process?
A)
\[PbC{{l}_{2}}\]
done
clear
B)
\[Pb(OH)Cl\]
done
clear
C)
\[PbOCl\]
done
clear
D)
\[Pb{{(OH)}_{2}}\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
The metals which are extremely important in strengthening the economy and defence of the country and are also used in the nuclear energy projects, space projects, etc. are known as______.
A)
Pure metal
done
clear
B)
Radioactive elements
done
clear
C)
Semi metals
done
clear
D)
Strategic metals
done
clear
E)
None of these
done
clear
View Answer play_arrow
Metals have generally 1, 2, 3 electrons in their outer most shell. Name the element having two electron in its outermost shell, but it is not metal itself.
A)
Ca
done
clear
B)
Mg
done
clear
C)
Be
done
clear
D)
He
done
clear
E)
None of these
done
clear
View Answer play_arrow
Non-metals are normally not the good conductor of electricity. Name the non-metal which is good conductor of electricity.
A)
Sulphur
done
clear
B)
Copper
done
clear
C)
Germanium
done
clear
D)
Graphite
done
clear
E)
None of these
done
clear
View Answer play_arrow
Name the electropositive non-metal.
A)
H
done
clear
B)
Cl
done
clear
C)
B
done
clear
D)
Na
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not present in the alloy of German silver?
A)
Cu
done
clear
B)
Zn
done
clear
C)
Ni
done
clear
D)
Mg
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following methods can be used for concentration of sulphide ore?
A)
Hydraulic Washing
done
clear
B)
Froth Floatation
done
clear
C)
Magnetic Separation
done
clear
D)
Chemical Separation
done
clear
E)
None of these
done
clear
View Answer play_arrow
What is the IUPAC name of the hydrocarbon given below?
A)
3, 4-dimethyl-1-Hexanol
done
clear
B)
3, 4- dimethyl -1-Hexanal
done
clear
C)
3, 4-dimethyl-1-Hexane
done
clear
D)
3, 4- dimethyl -1-Hexanoic acid
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following agents decomposes animal wastes into biogas?
A)
Aerobic Bacteria
done
clear
B)
Anaerobic Bacteria
done
clear
C)
Fungus
done
clear
D)
Virus
done
clear
E)
None of these
done
clear
View Answer play_arrow
Study the figure and identify which one of the following statements is correct?
A)
It represents magnetic fields of a bar magnet
done
clear
B)
It represents earth magnetic field
done
clear
C)
It is a magnetic field pattern of a bar magnet traced by iron filling
done
clear
D)
It is an electromagnet
done
clear
E)
None of these
done
clear
View Answer play_arrow
The color of live wire in the electric circuit in the live wire is_______.
A)
Green
done
clear
B)
Red
done
clear
C)
Black
done
clear
D)
White
done
clear
E)
None of these
done
clear
View Answer play_arrow
Calculate the equivalent resistance of the circuit given below.
A)
\[10.2\,\,\Omega \]
done
clear
B)
\[12.68\,\,\Omega \]
done
clear
C)
\[11.7\,\,\Omega \]
done
clear
D)
\[9.69\,\,\Omega \]
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following figures shows the correct combination of voltmeter in the electrical circuit?
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following shows the application of heating effect of electric current?
A)
(a)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
E)
None of these
done
clear
View Answer play_arrow
Find the position of image of a concave mirror which produces three times magnified image when the object is placed at a distance of 10 from the concave mirror.
A)
\[+\,\,30\,cm\]
done
clear
B)
\[-\,\,30\,cm\]
done
clear
C)
\[+\,\,25\,cm\]
done
clear
D)
\[-\,\,25\,cm\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
The spherical shaped organ which helps in exchanging of oxygen from blood is called_____.
A)
Bronchi
done
clear
B)
Trachea
done
clear
C)
Alveoli
done
clear
D)
Epiglottis
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which tissue helps in transportation of water and minerals in plants?
A)
Xylem
done
clear
B)
Phloem
done
clear
C)
Sieve Tube
done
clear
D)
Parenchyma
done
clear
E)
None of these
done
clear
View Answer play_arrow
How many molecules of ATP are produced by the complete oxidation of one gram mole of glucose?
A)
30
done
clear
B)
38
done
clear
C)
46
done
clear
D)
64
done
clear
E)
None of these
done
clear
View Answer play_arrow
Thick wall of heart which separates it into two parts as left and right is called_______.
A)
Valve
done
clear
B)
Membrane
done
clear
C)
Septum
done
clear
D)
Capillaries
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which tropism is responsible for the movement of plants in response to the chemicals?
A)
Phototropism
done
clear
B)
Geotropism
done
clear
C)
Chemotropism
done
clear
D)
Hydrotropism
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which gland controls the functioning of all the other gland?
A)
Pituitary Gland
done
clear
B)
Thymus Gland
done
clear
C)
Thyroid Gland
done
clear
D)
Adrenal Gland
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which among the following is not the part of human brain?
A)
Cerebrum
done
clear
B)
Medulla Oblongata
done
clear
C)
Auxins
done
clear
D)
Mid Brains
done
clear
E)
None of these
done
clear
View Answer play_arrow
How many pairs of nerves arise from the spinal chord?
A)
21
done
clear
B)
31
done
clear
C)
41
done
clear
D)
51
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following flowers is bisexual?
A)
Rose
done
clear
B)
Cron
done
clear
C)
Papaya
done
clear
D)
Cucumber
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following animals shows external fertilization?
A)
Birds
done
clear
B)
Toads
done
clear
C)
Reptiles
done
clear
D)
Goat
done
clear
E)
None of these
done
clear
View Answer play_arrow
How does sponge reproduce?
A)
Fragmentation
done
clear
B)
Regeneration
done
clear
C)
Fission
done
clear
D)
Grafting
done
clear
E)
None of these
done
clear
View Answer play_arrow
Name the organ through which the developing foetus obtain its food from the mother's
A)
Ureters
done
clear
B)
Placenta
done
clear
C)
Uterus
done
clear
D)
Zygote
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is represented by mark (2) in the figure given below?
A)
Centromere
done
clear
B)
Telomeres
done
clear
C)
Euchromatin
done
clear
D)
Heterochromatin
done
clear
E)
None of these
done
clear
View Answer play_arrow
Given below is the figure of organism in which first rudimentary eye has appeared. Identify the organism in the figure given below.
A)
Earth worm
done
clear
B)
Fluk Worm
done
clear
C)
Planaria
done
clear
D)
Tape Worm
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following statements is correct regarding the ecosystem? Statement 1: It is a functional unit of environment. Statement 2: Land, forest and water bodies are the parts of ecosystem.
A)
Statement 1 and 2 both are correct
done
clear
B)
Statement 1 is correct and 2 is incorrect
done
clear
C)
Statement 1 is incorrect and 2 is correct
done
clear
D)
Statement 1 and 2 both are incorrect
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is true regarding the transfer of energy in the food chain?
A)
900 J \[\to \] 90 J \[\to \] 0.9 J \[\to \] 0.09 J
done
clear
B)
1000 J \[\to \] 100 J \[\to \]10 J \[\to \]1 J
done
clear
C)
750 J \[\to \] 7.5 J \[\to \] 0.75 \[\to \] 0.075 J
done
clear
D)
1200 J \[\to \]120 J \[\to \]1.20 J\[\to \]0.120 J
done
clear
E)
None of these
done
clear
View Answer play_arrow