4g of copper was dissolved in concentrated nitric acid. The coppe

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement

161.

4g of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave 5 g of its oxide. The equivalent weight of copper is

  • 23

  • 32

  • 12

  • 20


B.

32

Weight of copper oxide = 5 g
Weight of copper taken =4 g
Weight of oxygen in copper oxide = 5-4= 1g
Weight of copper, reacted with 1 g.
    O= 4g

 Weight of copper, which would react with

8g O2= 4 ×81 = 32gHence, equivalent weight of copper= 32


Advertisement
162.

The volume of water to be added to N2 to prepare 500 mL of N10 solution is

  • 450 mL

  • 100 mL

  • 45 mL

  • 400 mL


163.

The equivalent weight of a certain trivalent element is 20. Molecular weight of its oxide is

  • 152

  • 56

  • 168

  • 68


164.

What is the volume of "20 volume H2O2" required to get 5000 cm3 of oxygen at STP?

  • 250 cm3

  • 50 cm3

  • 100 cm3

  • 125 cm3


Advertisement
165.

Molarity of 0.2 N H2SO4 is

  • 0.2

  • 0.4

  • 0.6

  • 0.1


166.

An atom of an element A has three electrons in its outermost orbit and that of B has six electrons in its outermost orbit. The formula of the compound between these two will be

  • A3B6

  • A2B3

  • A3B2

  • A2B


167.

The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is :

  • 56 g

  • 28 g

  • 42 g

  • 20 g


168.

Molarity of a given orthophosphoric acid solution is 3M. It's normality is

  • 9 N

  • 0.3 N

  • 3 N

  • 1 N


Advertisement
169.

Gram molecular volume of oxygen at STP is

  • 3200 cm3

  • 5600 cm3

  • 22400 cm3

  • 11200 cm3


170.

What is the equivalent weight of SnCl2 in the following reaction?

SnCl2 + Cl2 → SnCl4

  • 95

  • 45

  • 60

  • 30


Advertisement