Chemistry MCQs with answers Page - 158

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Q. The main constituent of natural gas is:

  • (A) Ethane
  • (B) Methane
  • (C) Propane
  • (D) Butane

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Q. Which of the following is used in vulcanization of rubber?

  • (A) Phosphorus
  • (B) Sulfur
  • (C) Chlorine
  • (D) Nitrogen

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Q. The oxidation state of chromium in Cr₂O₇²⁻ is:

  • (A) +3
  • (B) +4
  • (C) +6
  • (D) +7

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Q. Which of the following is a condensation polymer?

  • (A) Polythene
  • (B) PVC
  • (C) Nylon-6,6
  • (D) Polypropylene

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Q. The shape of NH₄⁺ ion is:

  • (A) Bent
  • (B) Trigonal pyramidal
  • (C) Tetrahedral
  • (D) Square planar

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Q. Which of the following is an ore of aluminium?

  • (A) Haematite
  • (B) Bauxite
  • (C) Galena
  • (D) Zinc blende

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Q. The functional group present in aldehydes is:

  • (A) -OH
  • (B) -COOH
  • (C) -CHO
  • (D) -CO-

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Q. Which of the following is an intensive property?

  • (A) Mass
  • (B) Volume
  • (C) Density
  • (D) Number of moles

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Q. The catalyst used in hydrogenation of vegetable oils is:

  • (A) Iron
  • (B) Copper
  • (C) Nickel
  • (D) Platinum

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Q. Which of the following is an example of a buffer solution?

  • (A) HCl + H₂O
  • (B) NaOH + H₂O
  • (C) CH₃COOH + CH₃COONa
  • (D) NaCl + H₂O

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