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1. Which of the following is not a common industrial use of phosphine?

a) As a reducing agent in chemical synthesis

b) As a pesticide for stored grain

c) As a fuel for rocket propulsion

d) As a component in hair dye

2. What is the appearance of phosphine gas at room temperature?

a) Colorless gas

b) Clear liquid

c) White solid

d) Yellow gas

3. What is the primary hazard associated with phosphine?

a) Flammability

b) Toxicity

c) Corrosiveness

d) Explosiveness

4. What is the solubility of phosphine in water?

a) Insoluble

b) Slightly soluble

c) Moderately soluble

d) Highly soluble

5. Is Phosphine flammable?

a) Yes, it is highly flammable

b) No, it is not flammable

c) It is only flammable in high concentrations

d) Its flammability depends on the conditions

6. What is the chemical formula for phosphine?

a) PH3

b) H3P

c) P3H

d) H3PO3

7. What is the molecular geometry of phosphine?

a) tetrahedral

b) linear

c) trigonal pyramidal

d) octahedral

8. How is phosphine typically produced?

a) reduction of phosphoric acid

b) oxidation of phosphorous

c) reaction of phosphoric acid and sodium hydroxide

d) reaction of phosphorous and hydrogen

9. How does phosphine react with oxygen?

a) it burns to form water and phosphorus pentoxide

b) it explodes

c) it forms phosphoric acid

d) it does not react

10. What is the major use of phosphine in industry?

a) as a reducing agent

b) as a fuel

c) as a semiconductor material

d) as a fumigant for stored grain

Answers:

    1. d
    2. d
    3. b
    4. a
    5. a
    6. a
    7. c
    8. d
    9. a
    10. d
    1. Applications of Tartaric acid
    2. Pediculicides
    3. Calcium Hydroxide
    4. Ozone
    5. Urea
    6. Esters

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    Multiple Choice Questions (MCQs)

    The UPSC (Union Public Service Commission) Prelims exam is the first step in the selection process for the Indian Administrative Service (IAS), Indian Foreign Service (IFS), and Indian Police Service (IPS) among other civil services in India. The exam consists of two papers: General Studies Paper 1 and General Studies Paper 2 (also known as the Civil Services Aptitude Test or CSAT). The General Studies Paper 1 is worth 200 marks and is comprised of multiple choice questions (MCQs). The exam tests the candidate's knowledge of current events, Indian and World history, Indian and World geography, Indian polity and governance, economic and social development, general science and environmental ecology and biodiversity.

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