Find the odd one out.
A)
\[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O\]
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B)
\[C+{{O}_{2}}\to C{{O}_{2}}\]
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C)
\[CuS{{O}_{4}}+Fe\to FeS{{O}_{4}}+Cu\]
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D)
\[2Na+C{{l}_{2}}\to 2NaCl\]
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E)
None of these
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The short-circuit in a circuit occurs due to:
A)
Reduction of current in the circuit
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B)
Continuous variation of current in circuit
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C)
Heavy increase in the current in circuit
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D)
Current does not flow through the circuit
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E)
None of these
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When an object is placed at the focus of the convex lens, the image is formed:
A)
At the infinity
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B)
At twice the focal length
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C)
At focus of the lens
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D)
Between the optical centre of lens and its focus
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E)
None of these
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Decomposers in ecosystem act as_____ of environment.
A)
Recycling agent
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B)
Cleansing agents
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C)
Producers
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D)
Both [a] and [b]
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E)
None of these
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Which of the following explains the term myopia?
A)
Person is unable to see distant objects clearly
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B)
Person is unable to see nearby objects clearly
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C)
Person is unable to see both distant and nearby objects clearly
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D)
Person is unable to see anything
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E)
None of these
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Spirogyra reproduces by ____ method of reproduction.
A)
Regeneration
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B)
Fragmentation
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C)
Budding
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D)
Spore formation
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E)
None of these
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What will be the direction of magnetic field, if a stream of positively charged particles moving towards east is deflected towards north by a magnetic field?
A)
Towards south
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B)
Towards north
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C)
Downward
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D)
Upward
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E)
None of these
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A strong acid is _____.
A)
Completely ionised in water
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B)
Partially ionised in water
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C)
Not ionised in water
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D)
All of these
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E)
None of these
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Consider the following two statements: Statement A: Earthing of electrical appliances is done to avoid risk of electric shock. Statement B: The insulated copper wire which is red in colour is the earth wire. Which of the following is correct with respect to the above statements?
A)
Statement A is correct.
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B)
Statement B is correct.
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C)
Statement A and B are correct.
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D)
Neither statement A nor statement B is correct.
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E)
None of these
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Those organs which have the same basic structure but different functions are called:
A)
Homologous organs
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B)
Analogous organs
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C)
Primitive organs
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D)
Modified organs
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E)
None of these
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If the refractive index of water for light going from air to water is 1.5 then what will be the refractive index for light going from water to air?
A)
0.66
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B)
0.55
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C)
3
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D)
6
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E)
None of these
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What is biological magnification?
A)
Increase in the availability of energy at each trophic level of the food chain
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B)
Increase in the size of the living organisms at each trophic level of food chain
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C)
Increase in the concentration of harmful chemical substances in the body of living organisms at each trophic level of food chain
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D)
Both [a] and [b]
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E)
None of these
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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
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B)
Mg
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C)
Be
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D)
He
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E)
None of these
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In which of the following parts villi is present?
A)
Large intestine
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B)
stomach
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C)
small intestine
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D)
liver
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E)
None of these
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The process of obtaining food by Amoeba is known as:
A)
Cytokinesis
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B)
dialysis
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C)
phagocytosis
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D)
amoebiasis
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E)
None of these
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Which of the following is the correct path taken by urine in our body?
A)
Kidney\[\to \]Ureter\[\to \]Urethra\[\to \]bladder
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B)
Kidney\[\to \]bladder\[\to \]Urethra\[\to \]Ureter
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C)
Kidney\[\to \]Ureter\[\to \]bladder\[\to \]Urethra
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D)
Bladder\[\to \]Kidney\[\to \]Ureter\[\to \]Urethra
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E)
None of these
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The reaction\[AgN{{o}_{3}}(aq)+NaCl(aq)\to AgCl(s)+NaN{{O}_{3}}(aq)\]is
A)
Decomposition reaction
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B)
Composition reaction
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C)
Oxidation and Reduction reaction
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D)
Double displacement reaction
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E)
None of these
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Which gas is used to prevent food from rancidity?
A)
Oxygen
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B)
Nitrogen
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C)
Carbon dioxide
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D)
Hydrogen
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E)
None of these
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An object is placed at the centre of curvature of a concave mirror. The distance between its image and the pole is:
A)
equal to f
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B)
between f and 2f
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C)
equal to 2f
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D)
greater than 2f
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E)
None of these
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A device that can be used to produce an electric current in the circuit is:
A)
an ammeter
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B)
a motor
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C)
a generator
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D)
a galvanometer
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E)
None of these
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Joule/Coulomb is the same as
A)
watt
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B)
volt
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C)
ampere
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D)
orm
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E)
None of these
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A voltmeter is used to measure
A)
potential difference
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B)
electric current
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C)
electric power
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D)
resistance
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E)
None of these
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