General Science - Chemistry MCQ's




All Questions are from Year - 2018 or older

Question 361 :
An atomic dock is based on transitions in

  1. Sodium
  2. Caesium
  3. Magnesium
  4. Aluminium
  

Question 362 :
The anode of a dry cell is made up of

  1. Iron
  2. Cadmium
  3. Zinc
  4. Lead
  

Question 363 :
Which of the following is an iron ore ?

  1. Bauxite
  2. Magnetite
  3. Lignite
  4. Nitrite
  

Question 364 :
Ammonia is a mixture of

  1. aluminium powder and ammonium nitrate
  2. aluminium powder and ammonium chloride
  3. aluminium powder and ammonium sulphate
  4. aluminium powder and potassium nitrate
  

Question 365 :
When cone H2S04 is added to dry KNO3 brown fumes are evolved. These fumes are due to

  1. S03
  2. S02
  3. N02
  4. N2O
  

Question 366 :
Stainless steel is an alloy of

  1. chromium and carbon
  2. chromium carbon and iron
  3. chromium and iron
  4. carbon and iron
  

Question 367 :
KMN04 can be used as a an

  1. insecticide
  2. fertiliser
  3. pesticide
  4. disinfectant
  

Question 368 :
Drinking soda is

  1. (I) Alkaline
  2. Acidic
  3. Neutral
  4. Oxidant (BSC
  

Question 369 :
Ozone depletion in the atmosphere is mainly caused by

  1. sulphur dioxide
  2. nitrogen dioxide
  3. hydrogen sulphide
  4. chlorofluorocarbon
  

Question 370 :
Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes?

  1. Borax
  2. Saltpetre
  3. Hydrogen peroxide
  4. Sodium chloride
  

Question 371 :
Which is abundant in Gobar gas?

  1. Carbon dioxide
  2. Methane
  3. Oxygen
  4. Hydrogen
  

Question 372 :
The most abundant inert gas in the atmosphere is

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

Question 373 :
Byproduct obtained by soap industry is

  1. Caustic soda
  2. Glycerol
  3. Naphthalene
  4. Caustic potash
  

Question 374 :
The coloured discharge tubes foradvertisement mainly contain

  1. Xenon
  2. Argon
  3. Helium
  4. Neon
  

Question 375 :
Pasteurization is the process in which milk is heated to

  1. 60°C for 10 minutes .
  2. 63° C for 20 minutes
  3. 63°C for 30 minutes
  4. 72°C for 10 minutes
  

Question 376 :
What is the most commonly used Substance in fluorescent tubes?

  1. Sodium oxide and argon
  2. Sodium vapour and neon
  3. Mercury vapour and argon
  4. Mercury oxide and neonv
  

Question 377 :
In nuclear reactors graphite is used as a an

  1. fuel
  2. lubricant
  3. moderator
  4. insulator
  

Question 378 :
( The gas used for filling weather balloons is

  1. helium
  2. hydrogen
  3. air
  4. nitrogen
  

Question 379 :
Two elements which can form a large number of compounds are

  1. Carbon and Hydrogen
  2. Carbon and Nitrogen
  3. Carbon and Oxygen
  4. Carbon and Sulphur
  

Question 380 :
Percentage of lead in lead pencils is

  1. 0
  2. 66
  3. 40
  4. 80
  

Question 381 :
The substance which does not expand on going from liquid state to solid state is

  1. Water
  2. Castiron
  3. Aluminium
  4. Type metal
  

Question 382 :
Which of the following is used in making smoke bombs?

  1. Sulphur
  2. Phosphorus
  3. Hydrogen
  4. Carbon
  

Question 383 :
Saccharin is made up of

  1. Toluene
  2. Phenol
  3. Propane
  4. Butane
  

Question 384 :
Cloud is a colloidal dispersion of

  1. Air in a dispersion medium of water
  2. Fog in a dispersion medium of water
  3. Mist in a dispersion medium of air
  4. Water drops in a dispersion medium of air
  

Question 385 :
The chemical(s) most commonly used for cloud seeding or artificial rainmaking is are

  1. Silver Iodide
  2. Sodium Chloride
  3. Dry ice or frozen carbon dioxide
  4. All the above
  

Question 386 :
Brass is made of

  1. copper and tin
  2. tin and lead
  3. copper and zinc
  4. copper tin and zinc
  

Question 387 :
Which type of radiations are absorbed by the upper layer of the atmosphere?

  1. Radiowaves
  2. Infrared
  3. Visible
  4. Ultraviolet
  

Question 388 :
Which of the following is used to remove rust stains on cloth?

  1. Kerosene
  2. Lime
  3. Oxalic acid solution
  4. Petrol
  

Question 389 :
The main constituent of naturalgas is

  1. Methane
  2. Ethane
  3. Butane
  4. Propane
  

Question 390 :
Which ofthe following can be used to absorb neutrons to control the chain reaction during nuclear fission?

  1. Boron
  2. Heavy water
  3. Uranium
  4. Plutonium
  
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