General Science - Chemistry

91. Why the bacteria cannot degrade the detergents easily?
[A] Due to its sticky nature
[B] Due to highly branched hydrocarbon chain
[C] Due to its heavy density
[D] None of the above

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92. What is the use of iodoform?
[A] It helps in reducing fever
[B] It is used to induce sleep
[C] It is used as an antiseptic for wounds
[D] It is used to reduce acidity

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93. Which of the following drug is an antihistamine?
[A] Dimetapp
[B] Seldane
[C] Cetrizine
[D] All of the above

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94. Which of the following gases were called Fixed Air by Scottish physician Joseph Black which is discovered in 1750s?
[A] Oxygen
[B] Carbon Dioxide
[C] Methane
[D] Nitric Oxide

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95. The principle that equal volumes of all gases contain the same number of molecules when under the same conditions of pressure and temperature was given by?
[A] Dmitri Mendeleyev
[B] Jons Jacob Berzelius
[C] Amedeo Avogadro
[D] John Dalton

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96. Who recognized and named Oxygen?
[A] Antoine Lavoisier
[B] Henry Cavendish
[C] Alessandro Volta
[D] Louis Claude Cadet de Gassicourt

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97. Who discovered that water is composed of two parts hydrogen and one part oxygen by volume?
[A] Pierre Robiquet
[B] Joseph Louis Gay-Lussac
[C] Henri-Victor Regnault
[D] Georges Urbain

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98. Who was the first person to devise a periodic table of chemical elements arranged in order of their relative atomic masses?
[A] Dmitri Mendeleev
[B] John Dalton
[C] John Alexander Reina Newlands
[D] Johann Wolfgang Dobereiner

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99. Which of the following is correct electronic configuration of Krypton, whose atomic number is 36?
[A] 2, 18,16
[B] 2,8,18,8
[C] 2,18,8,8
[D] 2,8,20,6

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100. An element has an atomic weight of W and an atomic member of N. The number of protons in th nucleus of its atom is?
[A] N
[B] W
[C] W-N
[D] W+N

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