In the Haber process, 30 L of dihydrogen and 30L of dinitrogen were taken for the reaction, which yielded only 50% of the expected product. What will be the composition of the gaseous mixture under the said conditions in the end?

1. 20L ammonia, 10L nitrogen, 30L hydrogen

2. 20L ammonia, 25L nitrogen, 15L hydrogen

3. 20L ammonia, 20L nitrogen, 20L hydrogen

4. 10L ammonia, 25L nitrogen, 15L hydrogen

Subtopic:  Limiting Reagent |
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The number of atoms in 4.25 g of NH3 is approximately

1. 4 x 1023 

2. 2 x 1023 

3. 1 x 1023 

4. 6 x 1023 

Subtopic:  Moles, Atoms & Electrons |
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In the reaction, 4NH3(g)+ 5O2(g) 4NO(g) +6H2O(l)

When 1 mole of ammonia and 1 mole of O2  reacts to completion, then

1. 1.0 mole of H2O is produced 

2. 1.0 mole of NO will be produced

3. All the oxygen will be consumed

4. All the ammonia will be consumed

Subtopic:  Equation Based Problem |
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An element X has the following isotopic composition:

200X : 90%, 199X : 8.0%, 202X : 2.0%

The weighted average atomic mass of the naturally occurring element X is closest to 

1. 201 u

2. 202 u

3. 199 u

4. 200 u

Subtopic:  Moles, Atoms & Electrons |
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0.24g of a volatile gas, upon vaporisation, gives 45 mL vapour at NTP. What will be the vapour density of the substance?

(Density of H2 = 0.089)

1. 95.93

2. 59.93

3. 95.39

4. 5.993

Subtopic:  Moles, Atoms & Electrons |
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The hydrated salt, Na2SO4.nH2O, undergoes a 55% loss in mass on heating and becomes anhydrous. The value of n will be:

1. 5

2. 3

3. 7

4. 10

Subtopic:  Empirical & Molecular Formula |
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12 g of Mg (atomic mass = 24) will react completely with an acid to give:

1. One mole of H

2. Half mole of H2

3. One mole of O2

4. None of the above

Subtopic:  Equation Based Problem |
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The molality of a 15% (w/vol.) solution of H2SO4 of density 1.1g/cm3 is-

1. 1.2

2. 1.4

3. 1.8

4. 1.6

Subtopic:  Concentration Based Problem |
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Which mode of expressing concentration is independent of temperature?

1. Molality

2. Percent by mass

3. Mole fraction

4. All of the above 

Subtopic:  Concentration Based Problem |
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The product of atomic mass and specific heat of metal is approximately 6.4. This was given by:

1. Dalton's law

2. Avogadro's law

3. Newton's law

4. Dulong Petit's law

Subtopic:  Introduction |
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