General Science - Chemistry MCQ's




All Questions are from Year - 2018 or older

Question 1 :
Which of the following fibres catches fire least ?

  1. Nylon
  2. Cotton
  3. Rayon
  4. Terricot
  

Question 2 :
Which of the following is ozone depleting pesticide ?

  1. D.D.T.
  2. Benzene
  3. Methyl bromide
  4. Ethylene ozonide
  

Question 3 :
The substance most commonly used as a food preservative is

  1. sodium carbonate
  2. tartaric acid
  3. acetic acid
  4. sodium salt of benzoic acid
  

Question 4 :
The ratio of pure gold in 18 carat gold is

  1. 100%
  2. 80%
  3. 75%
  4. 60%
  

Question 5 :
Metal are good conductors because

  1. they contain free electrons
  2. the molecules in them are very close to each other
  3. the molecules in them collide Very freely
  4. they contain reflecting surface
  

Question 6 :
An atom of an element has atomic number 17 and mass number36 The number of neutrons in its nucleus is

  1. 17
  2. 19
  3. 36
  4. 53
  

Question 7 :
Electric bulbs are filled with :

  1. Nitrogen
  2. Carbon dioxide
  3. Argon
  4. Oxygen
  

Question 8 :
Bleaching action of moist sulphur dioxide is because of its

  1. basic property
  2. acidic property
  3. oxidising property
  4. reducing property
  

Question 9 :
Candle is a mixture of

  1. Paraffin was and stearic acid
  2. Bees wax and stearic acid
  3. Higher fatty acids and stearic acid
  4. Bees wax and paraffin wax
  

Question 10 :
Diamond is harder than graphite because of

  1. difference in layers of atoms
  2. tetrahedral structure of diamond
  3. difference of crystalline structures
  4. None of these
  

Question 11 :
Helium gas is used in gas balloons instead of hydrogen gas because it is

  1. lighter than hydrogen
  2. more abundant than hydrogen
  3. noncombustible
  4. more stable
  

Question 12 :
Gold dissolves in

  1. Hydrochloric acid
  2. Nitric acid
  3. Aquaregia
  4. Acetic acid
  

Question 13 :
The fundamental particles present in the nucleus of an atom are

  1. Electron proton
  2. Proton neutron
  3. Neutron electron
  4. Neutron positron
  

Question 14 :
Which of the following elements is not present in stainless steel?

  1. Iron
  2. Tungsten
  3. Chromium
  4. Nickel
  

Question 15 :
Nuclear energy is a mineralbased energy source. It is derived from

  1. uranium
  2. thorium
  3. plutonium
  4. All of the above
  

Question 16 :
Water gas is the mixture of

  1. carbon dioxide and hydrogen
  2. carbon monoxide and nitrogen
  3. carbon monoxide and hydrogen
  4. carbon dioxide and nitrogen
  

Question 17 :
What material is used to make electric heater coil ?

  1. Copper
  2. Iron
  3. Silver
  4. Nichrome
  

Question 18 :
The most abundant element in the human body is

  1. carbon
  2. iron
  3. nitrogen
  4. oxygen
  

Question 19 :
Which of the following is used to iodine common salt?

  1. Potassium iodide
  2. Iodine
  3. Potassium iodide
  4. Sodium iodide
  

Question 20 :
Mortar is a mixture of water sand and

  1. Slaked lime
  2. Quick lime
  3. Limestone
  4. Gypsum
  

Question 21 :
The chemical used in embalming biological materials is

  1. formaldehyde in water
  2. formaldehyde in methanol
  3. ethyleneglycol
  4. gaseous formaldehyde
  

Question 22 :
The most abundant constituent of atmospheric air is

  1. carbon
  2. hydrogen
  3. oxygen
  4. nitrogen
  

Question 23 :
The residue left after extracting juice from sugar beet and sugarcane is called

  1. molasses
  2. bagasse
  3. whey
  4. biomass
  

Question 24 :
In a nuclear reactor the material use for absorbing neutrons is

  1. zinc
  2. radium
  3. lead
  4. cadmium
  

Question 25 :
Rusting of iron takes place due to

  1. oxidation
  2. carbonation
  3. exfoliation
  4. corrosion
  

Question 26 :
Which of the following is used to remove ink and rust stains on cloth?

  1. Oxalic acid
  2. Alcohol
  3. Ether
  4. Kerosene oil
  

Question 27 :
An inert gas mixed with oxygen given to patients suffering from restricted breathing is

  1. Helium
  2. Krypton
  3. Radon
  4. Argon
  

Question 28 :
The tip of the matchstick contains

  1. phosphor us pentoxide
  2. white phosphorus
  3. red phosphorus
  4. phosphorus trichloride
  

Question 29 :
Galvanised iron is made by coating iron with

  1. Zinc
  2. Nickel
  3. Chromium
  4. Sulphur
  

Question 30 :
The greenhouse effect is caused by the higher level of which gas in the atmosphere ?

  1. Carbon monoxide
  2. Carbon dioxide
  3. Nitrous oxide
  4. Sulphur dioxide
  
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