Chemistry MCQs with answers Page - 156

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Q. The shape of BF₃ molecule is:

  • (A) Linear
  • (B) Bent
  • (C) Trigonal planar
  • (D) Tetrahedral

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Q. The IUPAC name of HCHO is:

  • (A) Methanal
  • (B) Ethanal
  • (C) Methanone
  • (D) Methanoic acid

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Q. Which of the following has the highest electron affinity?

  • (A) Fluorine
  • (B) Chlorine
  • (C) Oxygen
  • (D) Nitrogen

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Q. Which of the following is a non-polar molecule?

  • (A) NH₃
  • (B) H₂O
  • (C) CO₂
  • (D) SO₂

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Q. The gas evolved when sodium reacts with water is:

  • (A) Oxygen
  • (B) Hydrogen
  • (C) Nitrogen
  • (D) Chlorine

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Q. The pH of a 0.01 M HCl solution is:

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4

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Q. Which of the following is an example of sublimation?

  • (A) Melting of ice
  • (B) Boiling of water
  • (C) Heating of camphor
  • (D) Condensation of steam

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Q. The total number of electrons in SO₄²⁻ ion is:

  • (A) 46
  • (B) 48
  • (C) 50
  • (D) 52

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Q. Which of the following is used as an anti-knocking agent in petrol?

  • (A) Methanol
  • (B) Ethanol
  • (C) Tetraethyl lead
  • (D) Acetone

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Q. The oxidation state of manganese in KMnO₄ is:

  • (A) +4
  • (B) +5
  • (C) +6
  • (D) +7

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