General Science - Chemistry MCQs

71. Which among the following is not correctly matched?
[A] Sodium: Natrium
[B] Pottassium : Kalium
[C] Mercury :Hydrargyrum
[D] Arsenic : Stibium

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72. The chemical oxygen demand COD test is commonly used to measure which of the following?
[A] amount of organic compounds in water
[B] amount of oxygen in water
[C] amount of oxygen in a chemical
[D] amount of oxygen used in a oxygenation process

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73. Which among the following is an organic mineral?
[A] Amber
[B] Hornblende
[C] Angite
[D] Analcime

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74. Liming is the application of calcium and magnesium rich materials to soil in various forms, including marl, chalk, limestone, or hydrated lime. What is the purpose of liming?
[A] Increase the Soil pH
[B] Increase the bacteria activity
[C] Both A & B
[D] Decrease the bacterial activity

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75. Who among the following established that genetic code of all organisms is spelled out in three-letter words, each set of three nucleotides codes for a specific amino acid?
[A] Hargobind Khorana
[B] Barbara McClintock
[C] Theodor O. Diener
[D] Joseph L. Goldstein

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76. Which among the following is a main component of some alert tablets such as Alert, No Doz, Stay Awake & Vivarin?
[A] Thein
[B] Caffeine
[C] Nicotine
[D] catechins

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77. Which among the following compound of barium is used as radio contrast agent for X-ray imaging and other diagnostic procedures and also commonly called as Barium Food?
[A] Barium Carbonate
[B] Barium Sulphate
[C] Barium Bromide
[D] Barium hydroxide

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78. Which among the following is used as an antidote?
[A] Paracetamol
[B] Nicotine
[C] Thiamine
[D] Activated Charcoal

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79. Which among the following will undergo a chemical reaction depending on the pH of the solution?
[A] Calcium Oxide
[B] Zinc Oxide
[C] Ferric Oxide
[D] Ferrous Oxide

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80. Which among the following will undergo a chemical reaction depending on the pH of the solution?
[A] Calcium Oxide
[B] Zinc Oxide
[C] Ferric Oxide
[D] Ferrous Oxide

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