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
1.

Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?

  • 1/4

  • 3/8

  • 1/2

  • 1/2

3652 Views

2.

Equal masses of H2, O2 and methane have been taken in a container of volume V at temperature 270 C in identical conditions. The ratio of the volumes of gases H2 : O2: CH4 would be 

  • 8:16:1

  • 16:8:1

  • 16:1:2

  • 16:1:2

2981 Views

3.

When 22.4 L of H2 (g) is mixed with 11.2 L of Cl2 (g), each of at STP, the moles of HCl (g) formed is equal to

  • 1 mole of HCl (g)

  • 2 moles of HCl (g)

  • 0.5 mole of (g) 

  • 0.5 mole of (g) 

3178 Views

4.

1.0 g of magnesium is burnt with 0.56 g of O2 in a closed vessel. Which reactant is left in excess and how much?

  • Mg, 0.16 g

  • O2, 0.16 g

  • Mg, 0.44 g

  • Mg, 0.44 g

2123 Views

Advertisement
5.

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralised 10 mL of 1 M H2SO4.The percentage of nitrogen in the soil is

  • 37.33

  • 45.33

  • 35.33

  • 35.33

1861 Views

6.

How many grams of the concentrated nitric solution should be used to prepare 250 mL o 2.0M HNO3 ? The concentrated acid is 70% HNO3.

  • 45.0 g conc. HNO3

  • 90.0 g conc. HNO3

  • 70.0 g conc. HNO3

  • 70.0 g conc. HNO3

969 Views

7.

6.02 x 1020 molecules of urea are present in 100 mL of its solution. The concentration of solution is

  • 0.02 M

  • 0.01 M

  • 0.001 M

  • 0.001 M

1596 Views

8.

Mole fraction of the solute in a 1.00 molal aqueous solution is 

  • 0.0177

  • 0.0344

  • 1.7700

  • 1.7700

449 Views

Advertisement
9.

Which one of the following statements is not true?

  • Concentration of DO below 6 ppm is good for the growth of fish

  • Clean water would have a BOD value of less than 5 ppm

  • Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant

  • Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant

414 Views

10.

If Avogadro number NA, changed from 6.022 x 1023 mol-1 this would change

  • the definition of mass in units of grams

  • the mass of one mole of carbon

  • the ratio of chemical species to each other in the balanced equation

  • the ratio of chemical species to each other in the balanced equation

2828 Views

Advertisement