General Science - Chemistry

1.

Which among the following is the lowest atomic number element without any stable isotopes?

[A] Technetium
[B] Molybdenum
[C] Ruthenium
[D] Niobium

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2.

Which among the following is the main constituent of malleable metal alloy Pewter ?

[A] Copper
[B] Zinc
[C] Tin
[D] Bismuth

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3.

How many parts are of other metals in a 17 carat Gold?

[A] 3
[B] 5
[C] 7
[D] 9

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4.

Which among the following does not come under carbon Group of Periodic Table?

[A] silicon
[B] germanium
[C] tin
[D] selenium

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5.

Which among the following is not correctly matched?

[A] Sodium: Natrium
[B] Pottassium : Kalium
[C] Mercury :Hydrargyrum
[D] Arsenic : Stibium

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6.

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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7.

Which among the following is an organic mineral?

[A] Amber
[B] Hornblende
[C] Angite
[D] Analcime

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8.

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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9.

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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10.

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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