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1 International Organizations MCQs
Assistant Director - PESSI

When did Pakistan join the United Nations (UN)?

  • 14 August 1947
  • 30 September 1947
  • 30 October 1947
  • 10 December 1947
0 Comments
Correct Answer: B. 30 September 1947

Explanation:

Pakistan officially joined the United Nations (UN) on 30 September 1947, just over six weeks ... Read More Details

2 Biology Mcqs
Assistant Director - PESSI

Influenza is a __________?

  • Bacteria
  • Fungus
  • Virus
  • Protozoa
0 Comments
Correct Answer: C. Virus

Explanation:

Answer: Virus


Influenza, commonly known as the flu, is caused by ... Read More Details

3 Inorganic Chemistry MCQs

Which one of the following hydroxides is least ionic in nature and decomposes on heating?

  • Lithium hydroxide (LiOH)
  • Sodium hydroxide (NaOH)
  • Potassium hydroxide (KOH)
  • Cesium hydroxide (CsOH)
0 Comments
Correct Answer: A. Lithium hydroxide (LiOH)

Explanation:

Among alkali metal hydroxides, the ionic character depends on the size of the ... Read More Details

4 Inorganic Chemistry MCQs

The word “Alkali” means ?

  • Base
  • Basic salt
  • Ashes
  • Spirit
0 Comments
Correct Answer: C. Ashes

Explanation:

The term “alkali” has historical significance in chemistry. It comes from the Arabic ... Read More Details

5 Inorganic Chemistry MCQs

Which element is necessary for normal leaf development in plants?

  • Silicon (Si)
  • Barium (Ba)
  • Magnesium (Mg)
  • Calcium (Ca)
0 Comments
Correct Answer: D. Calcium (Ca)

Explanation:

Calcium (Ca) is a crucial nutrient for plants, playing a significant role in ... Read More Details

6 Inorganic Chemistry MCQs

Nitrates of which pair of elements give different products on thermal decomposition?

  • Na and K
  • Mg and Ca
  • Li and Na
  • Li and Ca
0 Comments
Correct Answer: C. Li and Na

Explanation:

The thermal decomposition of nitrates depends on the metal cation in the compound. ... Read More Details

7 Inorganic Chemistry MCQs

Which of the following sulphates is not soluble in water?

  • Sodium sulphate (Na₂SO₄)
  • Potassium sulphate (K₂SO₄)
  • Zinc sulphate (ZnSO₄)
  • Barium sulphate (BaSO₄)
0 Comments
Correct Answer: D. Barium sulphate (BaSO₄)

Explanation:

The solubility of sulphates in water varies depending on the metal cation present. ... Read More Details

8 Inorganic Chemistry MCQs

The ore CaSO₄·H₂O has the general name ?

  • Gypsum
  • Dolomite
  • Calcite
  • Plaster of Paris
0 Comments
Correct Answer: A. Gypsum

Explanation:

Gypsum is a naturally occurring mineral composed of calcium sulfate dihydrate (CaSO₄·2H₂O). The ... Read More Details

9 Inorganic Chemistry MCQs

Which one of the following substances conducts electricity by the movement of ions?

  • Graphite
  • Copper
  • Molten sodium chloride (NaCl)
  • Mercury
1 Comments
Correct Answer: C. Molten sodium chloride (NaCl)

Explanation:

Electricity conduction depends on the presence of mobile charge carriers. In substances like ... Read More Details

10 Inorganic Chemistry MCQs

Which one of the following carbonates is water insoluble?

  • Na₂CO₃
  • K₂CO₃
  • (NH₄)₂CO₃
  • CaCO₃
0 Comments
Correct Answer: D. CaCO₃

Explanation:

Calcium carbonate (CaCO₃) is a sparingly soluble or practically insoluble carbonate in water, ... Read More Details

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