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Some Basic Concepts of Chemistry · Question 48

AIPMT 2001MCQEasy📈 Topic in 12% papers+4−1
1

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

Answer

(1) 1.568 104

Solution

For the minimum molecular weight, one molecule of the enzyme contains at least one Se atom.

∴ 0.5\% of the molecular weight = 78.4

⇒ 0.5100 M = 78.4

⇒ M = 78.4 1000.5

= 15680

= 1.568 104

Answer: (1)

AIPMT 2001

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2

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
3

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
4

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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