Important Questions of Some Basic Concepts of Chemistry Chemistry | Zigya

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
361.

Sodium nitrate on reduction with Zn in presence of NaOH solution produces NH3. Mass of sodium nitrate absorbing 1 mole of electron will be

  • 7.750

  • 10.625

  • 8.000

  • 9.875


362.

In transforming 0.01 mole of PbS to PbSO4, the volume of '10 volume' H2O2 required will be

  • 11.2 mL

  • 22.4 mL

  • 33.6 mL

  • 44.8 mL


363.

An unknown element forms an oxide.What will be the equivalent weight of the element if the oxygen content is 20% by weight?

  • 16

  • 32

  • 8

  • 64


364.

2 N HCl solution will have same molar concentration as a

  • 4.0 N H2SO4

  • 0.5 N H2SO4

  • 1 N H2SO4

  • 2 N H2SO4


Advertisement
365.

Which has maximum number of atoms ?

  • 24 g of C

  • 56 g of Fe

  • 26 g of Al

  • 108 g of Ag


366.

35.4 ml of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is ?

  • 0.97 N

  • 0.142 N

  • 0.194 N

  • 0.244 N


367.

Which of the following has the smallest number of molecules ?

  • 0.1 mole of CO2 gas

  • 11.2 L of CO2 gas at STP

  • 22 g of CO2 gas

  • 22.4 x 10mL of CO2 gas at STP


368.

The value of amu is which of the following ?

  • 1.57 × 10-24 kg

  • 1.66 × 10-24 kg

  • 1.99 × 10-23 kg

  • 1.66 × 10-27 kg


Advertisement
369.

4.6 x 1022 atoms of an element weigh 13.8g. The atomic weight of that element is

  • 290

  • 180

  • 34.4

  • 10.4


370.

2g of mixture of CO and CO2 on reaction with excess I2Oproduced 2.54g of I2. What would be the mass% of CO2 in the original mixture?

  • 60

  • 30

  • 70

  • 35


Advertisement