Chemistry MCQs with answers Page - 138

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which compound is commonly known as 'baking soda'?

  • (A) Sodium carbonate
  • (B) Sodium bicarbonate
  • (C) Calcium carbonate
  • (D) Ammonium carbonate

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following statements about catalysts is true?

  • (A) They increase the activation energy of a reaction
  • (B) They alter the equilibrium position of a reaction
  • (C) They provide an alternative pathway with lower activation energy
  • (D) They are consumed in the reaction

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following indicators is used in acid-base titration involving strong acid and strong base?

  • (A) Phenolphthalein
  • (B) Methyl orange
  • (C) Litmus
  • (D) Congo red

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following is a noble gas?

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

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following represents an exothermic process?

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

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following compounds is used to soften hard water?

  • (A) Sodium chloride
  • (B) Sodium carbonate
  • (C) Calcium hydroxide
  • (D) Potassium permanganate

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which law relates the pressure and volume of a gas at constant temperature?

  • (A) Boyle’s law
  • (B) Charles’s law
  • (C) Avogadro’s law
  • (D) Gay-Lussac’s law

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Shyam Dubey • 3.70K Points
Extraordinary

Q. What is the chemical formula of quicklime?

  • (A) CaCO3
  • (B) Ca(OH)2
  • (C) CaO
  • (D) CaCl2

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which of the following has the lowest pH?

  • (A) Vinegar
  • (B) Milk
  • (C) Pure water
  • (D) Soap solution

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Shyam Dubey • 3.70K Points
Extraordinary

Q. Which type of reaction is represented by: 2Na + Cl2 → 2NaCl?

  • (A) Decomposition reaction
  • (B) Displacement reaction
  • (C) Combination reaction
  • (D) Double displacement reaction