Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.
Assertion (A) Electric conduction in gasses is possible at normal pressure. 
Reason (R) The electric conduction in gases depends only upon the potential difference between the electrodes.

1.  Both assertion and reason are true and reason is the correct explanation of assertion
2.  Both assertion and reason are true but reason is not the correct explanation of assertion
3.  Assertion is true but reason is false
4.  Both assertion and reason are false

Subtopic:  Kinetic Energy of an Ideal Gas |
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Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.
Assertion (A) The coil is bound over the metallic frame in moving coil galvanometer. 
Reason (R) The metallic frame helps in making steady deflection without any oscillation.

1. Both assertion and reason are true and reason is the correct explanation of assertion
2. Both assertion and reason are true but reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false

Subtopic:  Moving Coil Galvanometer |
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Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.
Assertion (A) The focal length of lens does not change, when red light is replaced by blue light. 
Reason (R) The focal length of lens does not depends on colour of light used.

1.  Both assertion and reason are true and reason is the correct explanation of assertion
2.  Both assertion and reason are true but reason is not the correct explanation of assertion
3.  Assertion is true but reason is false
4.  Both assertion and reason are false

Subtopic:  Lenses |
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Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.
Assertion (A) When two coils are wound on each other, the mutual induction between the coils is maximum. 
Reason (R) Mutual induction does not depend on the orientation of the coils

1.  Both assertion and reason are true and reason is the correct explanation of assertion
2.  Both assertion and reason are true but reason is not the correct explanation of assertion
3.  Assertion is true but reason is false
4.  Both assertion and reason are false

Subtopic:  Mutual Inductance |
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Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.
Assertion (A) Hydrogen atom consists of only one electron but its emission spectrum has many lines. 
Reason (R) Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

1.  Both assertion and reason are true and reason is the correct explanation of assertion
2.  Both assertion and reason are true but reason is not the correct explanation of assertion
3.  Assertion is true but reason is false
4.  Both assertion and reason are false

Subtopic:  Spectral Series |
From NCERT
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An allylide on hydrolysis gives allylene. The alkaline earth metal cation of allylide dissolves in dry ether in the presence of alkyl halide to form Grignard reagent. The allylide is
1.