General Science Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination

11. With reference to LNG (Liquefied Natural Gas), which among the following observations is / are correct?
1.LNG is odourless and colourless
2.LNG is generally non-corrosive and non-toxic
3.The weight of certain volume of LNG is around half of weight of same volume of water
Choose the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3

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12. The alloy steel containing chromium to resist rusting is known as stainless steel. What is played by Chromium in stainless steel?

  1. Chromium does not rust, so it works as protecting cover
  2. Chromium reacts with Iron to make a compound that is not affected by Oxygen

Select the correct option from the codes given below:

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 nor 2

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13. Nerve agents are a class of:

[A] phosphorus-containing organic chemicals
[B] sulphur-containing organic chemicals
[C] osmium-containing organic compounds
[D] radon-containing organic compounds

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14. Which of the following is not a metalloid?

[A] Boron
[B] Silicon
[C] Germanium
[D] Titanium

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15. Consider the following differences between metals and non-metals:

  1. While the oxides of metals are basic in nature, oxides of non-metals are acidic in nature
  2. While most of the metals are solid at room temperature, most of non-metals are gaseous at room temperature

  Which of the above statements is/are correct?

[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2

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16. Consider the following differences between Sodium Vapour Lamp and Mercury Lamp:

  1. While sodium vapour lamp gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination
  2. The light in sodium vapour lamp is from an atomic emission process whereas in mercury vapour lamp it is from fluorescence emission

Which of the above statements is/are correct?

[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2

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17. Which of the following are used as chemical agents in war?

  1. Mustard Gas
  2. Phosgene
  3. Sarin
  4. VX

Select the correct option from codes given below:

[A] 1 & 3 Only
[B] 1, 3 & 4 Only
[C] 2 & 4 Only
[D] 1, 2, 3 & 4

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18. Consider the following statements:

  1. Sucrose is the sweetest of all naturally occurring carbohydrates
  2. Acetylene is the basic chemical building block of natural rubber

Which of the above statements is / are correct?

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 nor 2

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19.   Consider the following differences between Soaps and Detergents:

  1. Detergents are carbonic compounds which are not alkaline, Soap are made from fat and alkali 
  2. Soaps are biodegradable while detergents are not biodegradable

Which of the above statements is/are correct?

[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2

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20.   Consider the following statements about the Coalbed Methane:

  1. It is called 'sweet gas' because of its lack of hydrogen sulphide
  2. It contains very little heavier hydrocarbons such as propane or butane

  Which of the above statements is/are correct?

[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2

Show Answer

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