The volume of water to be added to N2 to prepare 500 mL

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 Multiple Choice QuestionsMultiple Choice Questions

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


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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


D.

400 mL

Let, x mL of HCl are taken, then

N1V1 = N2V2

12 × x = 110 × 50012 × x = 110 × 500

x = 100 mL

Hence, water needed to add = 500 - 100 = 400 mL


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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


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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


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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


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