April 16, 2024

Science Quiz: Day: 90

August 22, 2022
Which one of the following is NOT true for bleaching powder?
  • (A) It is used as a reducing agent in chemical industries
  • (B) It is used for bleaching wood pulp in paper factories
  • (C) It is used for disinfecting drinking water
  • (D) It is used for bleaching linen in textile industry
Show Answer

ANSWER: A

How is carbon black obtained ?
  • (A) By heating wood at high temperature in absence of air
  • (B) By heating coal at high temperature in absence of air
  • (C) By burning hydrocarbons in a limited supply of air
  • (D) By heating coal at high temperature in presence of air
Show Answer

ANSWER: C

 

The Poisonous nature of Carbon monoxide (CO) is due to its :
  • (A) Insolubility in water
  • (B) Ability to form a complex with haemoglobin
  • (C) Ability to reduce some metal oxides
  • (D) Property of having one sigma bond
Show Answer

ANSWER: C

 

Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor ?
  • (A) Potassium
  • (B) Calcium
  • (C) Magnesium
  • (D) Strontium
Show Answer

ANSWER: A

 

Which pair of following is of Copper alloys ?
  • (A) Brass and invar
  • (B) Bronze and Nichrome
  • (C) Brass and Bronze
  • (D) None of these
Show Answer

ANSWER: C

 

Which of the following is also used as a lubricant ?
  • (A) Cuprite
  • (B) Graphite
  • (C) Haematite
  • (D) Cryolite
Show Answer

ANSWER: B

 

The material used for safety from nuclear radiation is :
  • (A) Copper
  • (B) Platinum
  • (C) Iron
  • (D) Lead
Show Answer

ANSWER: D

 

Which one of the following is a natural polymer ?
  • (A) Bakelite
  • (B) Silk
  • (C) Kevlar
  • (D) Lexan
Show Answer

ANSWER: B

 

Urea is :
  • (A) A nitrogen containing organic compound
  • (B) A nitrogen containing inorganic compound
  • (C) A plant hormone
  • (D) An Endergonic compound
Show Answer

ANSWER: A

  • The agricultural industry widely uses urea, a white crystalline solid containing 46 percent nitrogen as an animal feed additive and fertilizer.
The stench due to leakage from LPG cylinder is because of :
  • (A) Methane
  • (B) Propane
  • (C) Butane
  • (D) Ethyl mercaptan
Show Answer

ANSWER: D

LPG Cylinders

  • Typically, LPG is either 100% propane, 60% propane and 40% butane, or 35% propane and 65% butane, depending on the country and region

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