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1 Inorganic Chemistry MCQs

Which of the following compounds produces phosphoric acid when it reacts with water?

  • PCl₅
  • P₂O₃
  • P₂O₅
  • All of the above
0 Comments
Correct Answer: D. All of the above

Explanation:

Phosphoric acid (H₃PO₄) is an important oxyacid of phosphorus. Several phosphorus-containing compounds produce ... Read More Details

2 Inorganic Chemistry MCQs

The word “Phosphorus” comes from Greek. What does it mean?

  • Light bearing
  • Fire
  • Impure
  • Tetrahedral
0 Comments
Correct Answer: A. Light bearing

Explanation:

Phosphorus, an essential chemical element with the symbol P, was discovered in 1669 ... Read More Details

3 Inorganic Chemistry MCQs

Which allotropic form of phosphorus is poisonous?

  • White phosphorus
  • Red phosphorus
  • Black phosphorus
  • Violet phosphorus
0 Comments
Correct Answer: A. White phosphorus

Explanation:

Phosphorus exists in several allotropic forms, including white, red, black, and violet phosphorus. ... Read More Details

4 Organic Chemistry MCQs

Acetic anhydride can be prepared by treating ethyl alcohol with __________?

  • P₂O₅
  • H₂SO₄
  • Both A and B
  • PCl₅
0 Comments
Correct Answer: C. Both A and B

Explanation:

Acetic anhydride ((CH₃CO)₂O) is an important reagent in organic synthesis, widely used for ... Read More Details

5 Inorganic Chemistry MCQs

When phosphorous acid is heated, it decomposes to form phosphoric acid and ?

  • Phosphine
  • Phosphorus
  • Water
  • Phosphorus pentoxide
0 Comments
Correct Answer: A. Phosphine

Explanation:

Phosphorous acid (H₃PO₃) is an important oxyacid of phosphorus that exhibits both acidic ... Read More Details

6 Inorganic Chemistry MCQs

Phosphorus pentoxide (P₂O₅) is a hygroscopic powder that sublimes at __________.

  • 260°C
  • 360°C
  • 630°C
  • 620°C
0 Comments
Correct Answer: B. 360°C

Explanation:

Phosphorus pentoxide (P₂O₅) is one of the most important oxides of phosphorus. It ... Read More Details

7 Inorganic Chemistry MCQs

Phosphoric acid is a weak acid, and its basicity is __________.

  • 1
  • 3
  • 0
  • 2
0 Comments
Correct Answer: B. 3

Explanation:

Phosphoric acid (H₃PO₄) is an oxyacid of phosphorus and is classified as a ... Read More Details

8 Inorganic Chemistry MCQs

All the elements in Group VIA (Group 16) of the periodic table are __________ in nature.

  • Hygroscopic
  • Metals
  • Polymeric
  • Non-metals
0 Comments
Correct Answer: C. Polymeric

Explanation:

Group 16 elements, known as chalcogens, include oxygen (O), sulfur (S), selenium (Se), ... Read More Details

9 Inorganic Chemistry MCQs

Which allotropic form of phosphorus is the most stable?

  • White phosphorus
  • Black phosphorus
  • Red phosphorus
  • Violet phosphorus
0 Comments
Correct Answer: B. Black phosphorus

Explanation:

Phosphorus exists in several allotropic forms, including white, red, violet, and black phosphorus, ... Read More Details

10 Inorganic Chemistry MCQs

What is the chemical composition of Cinnabar?

  • ZnS
  • PbS
  • HgS
  • FeS
0 Comments
Correct Answer: C. HgS

Explanation:

Cinnabar is a naturally occurring mineral with the chemical formula HgS (mercury(II) sulfide). ... Read More Details