Assertion (A): 233 g of BaSOis equal to one mole of BaSO4
Reason (R): One mole of BaSO4 is obtained when one mole of BaCl2 is treated with 1 litre of 1M H2SO
 
1. Both (A) and (R) are true, and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Introduction |
 62%
From NCERT
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Given below are two statements: 
Assertion (A): Atoms can neither be created nor destroyed.
Reason (R): Under similar conditions of temperature and pressure, an equal volume of
gases do not contain an equal number of molecules.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Introduction |
 69%
From NCERT
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Assertion: Specific gravity is dimensionless.
Reason: Specific gravity is the density of a substance measured with respect to density of water at 4°C.

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

 
Subtopic:  Introduction |
 69%
From NCERT
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Assertion (A): The significant figure for 0.200 is 3, whereas the significant figure for 200 is 1.
Reason (R): Zero at the end or right of a number is significant, provided it is not on the right side of the decimal point.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Introduction |
 56%
From NCERT
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One of the statements of Dalton's atomic theory is given below:

"Compounds are formed when atoms of different elements combine in a fixed ratio"

Which of the following laws is not related to this statement?

(a) Law of conservation of mass

(b) Law of definite proportions

(c) Law of multiple proportions

(d) Avogadro law

1. (a), (d)

2. (b), (c)

3. (c), (d)

4. (b), (d)

Subtopic:  Introduction |
From NCERT
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Match the following physical quantities with units.

Physical quantity Unit
A. Molarity 1. mol kg-1 
B. Molality 2. mol L-1
C. Pressure 3. Candela
D. Luminous intensity 4. Pascal

Codes

A B C D
1. 1 4 2 3
2. 2 1 4 3
3. 1 4 3 2
4. 4 1 3 2
Subtopic:  Introduction |
 94%
From NCERT
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