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Some Basic Concepts of Chemistry · Question 44

AIPMT 2003MCQMedium📈 Topic in 38% papers+4−1
1

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

  1. 20 litres ammonia, 20 litres nitrogen, 20 litres hydrogen
  2. 10 litres ammonia, 25 litres nitrogen, 15 litres hydrogen
  3. 20 litres ammonia, 10 litres nitrogen, 30 litres hydrogen
  4. 20 litres ammonia, 25 litres nitrogen, 15 litres hydrogen

Answer

(2) 10 litres ammonia, 25 litres nitrogen, 15 litres hydrogen

Solution

N2(g) + 3H2(g) 2NH3(g)

∵ By volume, 1 L of N2 needs 3 L of H2; 30 L of H2 needs only 10 L of N2

⇒ H2 is the limiting reagent; expected NH3 = 23 30 = 20 L

⇒ Actual yield (50%) = 10 L of NH3

⇒ H2 used = 15 L, N2 used = 5 L

∴ Left: H2 = 30 - 15 = 15 L, N2 = 30 - 5 = 25 L, NH3 = 10 L

Answer: (2)

Out of syllabusAIPMT 2003

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2

Which has maximum molecules?

  1. 7 g N2
  2. 2 g H2
  3. 16 g NO2
  4. 16 g O2
AIPMT 2002
3

The percentage of C, H and N in an organic compound are 40%, 13.3% and 46.7% respectively then empirical formula is

  1. C3H13N3
  2. CH2N
  3. CH4N
  4. CH6N
AIPMT 2002
4

2.5 litre of 1 M NaOH solution is mixed with another 3 litre of 0.5 M NaOH solution. Then find out molarity of resultant solution.

  1. 0.80 M
  2. 1.0 M
  3. 0.73 M
  4. 0.50 M
AIPMT 2002
5

Percentage of Se in peroxidase anhydrous enzyme is 0.5\% by weight (at. wt. = 78.4), then the minimum molecular weight of peroxidase anhydrous enzyme is

  1. 1.568 104
  2. 1.568 103
  3. 15.68
  4. 2.136 104
AIPMT 2001
6

Molarity of liquid HCl, if density of solution is 1.17 g/cc, is

  1. 36.5
  2. 18.25
  3. 32.05
  4. 42.10
AIPMT 2001
7

Specific volume of cylindrical virus particle is 6.02 10-2 cc/g whose radius and length are 7 A and 10 A respectively. If NA = 6.02 1023, find molecular weight of virus.

  1. 15.4 kg/mol
  2. 1.54 104 kg/mol
  3. 3.08 104 kg/mol
  4. 3.08 103 kg/mol
AIPMT 2001
8

Volume of CO2 obtained by the complete decomposition of 9.85 g of BaCO3 is

  1. 2.24 L
  2. 1.118 L
  3. 0.84 L
  4. 0.56 L
AIPMT 2000

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