Chemistry Elements of Biological importance Test Online Mcqs Preparation

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

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Question 1 of 15

1. The nitrogen present in some fertilizers helps plants:

A. To produce fats

B. To produce sugars

C. To produce proteins

D. To fight against diseases

Question 1 of 15

Question 2 of 15

2. Which of the following step is not involved in NH₄NO₃manufacturing

A. Dehydration

B. Evaporation

C. Neutralization of HNO3 with NH3

D. Prilling

Question 2 of 15

Question 3 of 15

3. In contact process SO₃ manufacturing is favour at low temperature but in actual practice the reaction is carried out at 400-600°C the reason is that:

A. Equilibrium will established later

B. At high temperature reaction will be fast

C. Rate of forward reaction is low

D. Separation is easy at high temperature

Question 3 of 15

Question 4 of 15

4. Acid rain

A. Retards the growth of trees

B. Results in loss of flora and fauna

C. Effects big marble constructions

D. All of these

Question 4 of 15

Question 5 of 15

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

A. 2000°C

B. 1000°C

C. 1500°C

D. 3000°C

Question 5 of 15

Question 6 of 15

6. The catalyst V₂O₅ used in contact process is employed during:

A. Oxidizing SO2 to SO3

B. None of the above

C. Burning molten sulfur with air

D. Absorbing sulfuric acid in water

Question 6 of 15

Question 7 of 15

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

A. Nitrates contains oxygen

B. Nitrates are very soluble in water

C. Nitrates are salts

D. Nitrate ions are negatively charged

Question 7 of 15

Question 8 of 15

8. 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. At low temperature of reaction cannot be controlled

C. The amount of products is less at low temperature

D. Rate of reaction is slow at low temperature

Question 8 of 15

Question 9 of 15

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

A. Formaldehyde

B. NO and NO2

C. CFCs

D. SO2 and SO3

Question 9 of 15

Question 10 of 15

10. Which one of the following statement is correct for urea?

A. None of these

B. It is an inorganic water soluble compound

C. It is a natural fertilizer

D. It is a synthetic fertilizer

Question 10 of 15

Question 11 of 15

11. Nitric acid is prepared commercially by:

A. Contact process

B. Haber’s process

C. Brikeland and Eyde’s process

D. Wurtz-Fitting synthesis

Question 11 of 15

Question 12 of 15

12. Maximum ammonia is used for the

A. Explosive formation

B. Fertilizer itself

C. Manufacturing of Nylon

D. Manufacturing of fertilizer

Question 12 of 15

Question 13 of 15

13. In Contact process for the manufacture of sulfuric acid, the most important reaction occurs in the catalyst chamber. Which set of the reactants and the catalyst are correct

A. Sulfur, air and Pt

B. Sulfur dioxide air and steam

C. Sulfur, Oxygen and V2O5

D. Sulfur dioxide, air and V2O5

Question 13 of 15

Question 14 of 15

14. The manufacturing of nitrogenous fertilizer’s from ammonia is the result of:

A. Addition Reaction

B. Acid-base reaction

C. Decomposition reaction

D. Substitution Reaction

Question 14 of 15

Question 15 of 15

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

A. It doesn’t dissolve in water

B. None of the above

C. The reaction is too exothermic and difficult to control

D. It forms oleum instead of sulfuric acid

Question 15 of 15

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Chemistry Elements of Biological importance Test Online Mcqs Preparation

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

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