Chemistry Elements of Biological importance Test Online Mcqs Preparation

Chemistry Elements of Biological importance Test Online Mcqs Preparation With Answers Start Below

Show paginator

Hide paginator

Question 1 of 15

1. The contact process was first developed by:

A. Jabir bin hayyan

B. Henary

C. Knietsch

D. Birkeland

Question 1 of 15

Question 2 of 15

2. Nitrates from fertilizers used on farmland can cause pollution. Why do nitrates pollute rivers:

A. Nitrates are salts

B. Nitrates contains oxygen

C. Nitrate ions are negatively charged

D. Nitrates are very soluble in water

Question 2 of 15

Question 3 of 15

3. Which of the following is not primary pollutant?

A. SO3

B. NO

C. CO

D. H2SO4

Question 3 of 15

Question 4 of 15

4. Which of the following occurs in Contact process:

A. SO3 is dissolved in water

B. Sulfur trioxide is dissolved in conc. Sulfuric acid

C. SO2 is dissolved in water

D. Sulfur trioxide is dissolved in dil. Sulfuric acid

Question 4 of 15

Question 5 of 15

5. For plants to grow well they need soils which contain compounds of:

A. Potassium

B. Phosphorous

C. All of them

D. Nitrogen

Question 5 of 15

Question 6 of 15

6. Sulfuric acid is not prepared by dissolving SO₃ in water because:

A. None of the above

B. It forms oleum instead of sulfuric acid

C. It doesn’t dissolve in water

D. The reaction is too exothermic and difficult to control

Question 6 of 15

Question 7 of 15

7. Nitric acid is prepared commercially by:

A. Haber’s process

B. Contact process

C. Wurtz-Fitting synthesis

D. Brikeland and Eyde’s process

Question 7 of 15

Question 8 of 15

8. Why do farmers and gardeners often treat soil with ammonia sulphate:

A. To reduce the acidity of the soil

B. To increase the nitrogen contents of the soil

C. To increase the oxygen contents of the soil

D. To kill harmful insects

Question 8 of 15

Question 9 of 15

9. The temperature at which nitrogen oxidized to NO during HNO₃ production is:

A. 1000°C

B. 2000°C

C. 3000°C

D. 1500°C

Question 9 of 15

Question 10 of 15

10. The nitrogen present in some fertilizers helps plants:

A. To produce proteins

B. To produce sugars

C. To produce fats

D. To fight against diseases

Question 10 of 15

Question 11 of 15

11. During the manufacture of ammonia by Haber’s process, a high yield is favoured by high pressure and low temperature. However, in practice, a high temperature of 450°C is employed because:

A. At low temperature ammonia liquefies

B. At low temperature, the catalyst is inactive

C. At low temperatures, reaction rates are too slow

D. At low temperature, the reacting gases would not react

Question 11 of 15

Question 12 of 15

12. In Harber’s process maximum ammonia can be achieved by reducing temperature, but on contrary we maintain high temperature of 400°C because

A. Reaction is stopped at low temperature

B. The amount of products is less at low temperature

C. At low temperature of reaction cannot be controlled

D. Rate of reaction is slow at low temperature

Question 12 of 15

Question 13 of 15

13. In Antarctica, ozone depletion is due to the formation of compound

A. CFCs

B. SO2 and SO3

C. Formaldehyde

D. NO and NO2

Question 13 of 15

Question 14 of 15

14. The steps involved in the manufacture of HNO₃:

A. Combusting N2 with O2 to NO

B. All of the above

C. Absorption of NO2 in H2O

D. Oxidation of NO to NO2 at 600°C

Question 14 of 15

Question 15 of 15

15. Sulphuric acid is king of chemicals, in its reactions it generally not act as

A. An acid

B. A reducing agent

C. Oxidizing agent

D. Dehydrating agent

Question 15 of 15

Pages

Categories

Chemistry Elements of Biological importance Test Online Mcqs Preparation

Chemistry Elements of Biological importance Test Online Mcqs Preparation With Answers Start Below

Related Study Posts:

Leave a Reply Cancel reply