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Non-Metals and Their Compounds

312 MCQ questions with answers and explanations · page 5 of 13

Test yourself▶ 25 question test▶ 50 question test

Q101. By mixing yeast in wheat flour and making double roti, it becomes spongy and soft, because_

  1. AYeast being gentle makes the dough soft
  2. BThe CO² produced makes the bread spongy
  3. CYeast breaks down proteins
  4. DYeast produces acetic acid
Show answer & explanation

Answer: B) The CO² produced makes the bread spongy

Q102. Which one of the following groups of gases contributes to the 'greenhouse effect'?

  1. Acarbon dioxide and methane
  2. BAmmonia and ozone
  3. Ccarbon monoxide and sulfur dioxide
  4. Dcarbon tetrafluoride and nitrous oxide
Show answer & explanation

Answer: A) carbon dioxide and methane

Q103. The gas responsible for global warming is ____

  1. Acarbon dioxide
  2. Bcarbon monoxide
  3. Cnitrous oxide
  4. Doxide on nitrogen
Show answer & explanation

Answer: A) carbon dioxide

Q104. Sodium bicarbonate undergoes a chemical decomposition (dissociation) at about 70°C, making it useful in bakery products. The decomposition product responsible for this use of sodium bicarbonate is

  1. Acarbon dioxide
  2. Bhydrogen
  3. Cwater vapor
  4. Doxygen
Show answer & explanation

Answer: A) carbon dioxide

Q105. Which of the following elements is used in solar cells?

  1. ASilicon
  2. BCerium
  3. CAstatine
  4. DVanadium
Show answer & explanation

Answer: A) Silicon

Q106. The most commonly used material for making transistors is ____

  1. Aaluminum
  2. BSilicon
  3. Crepentance
  4. Dsilver
Show answer & explanation

Answer: B) Silicon

Q107. What is silicon?

  1. ADriver
  2. Bsemiconductor
  3. Celectrical insulator
  4. Dbad conductor
Show answer & explanation

Answer: B) semiconductor

Q108. Which of the following is the best example of a water desiccant?

  1. Asilica gel
  2. Bpolystyrene
  3. Csodium chloride
  4. Dsodium carbonate
Show answer & explanation

Answer: A) silica gel

Q109. Artificial diamond is known as-

  1. Asilicon tetrachloride
  2. Bsodium silicate
  3. Csilicon hydride
  4. Dsilicon carbide
Show answer & explanation

Answer: D) silicon carbide

Q110. What is quartz made of?

  1. Afrom calcium sulfate
  2. Bfrom calcium silicate
  3. Cfrom sodium sulfate
  4. Dfrom sodium silicate
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Answer: B) from calcium silicate

Q111. What is 'kaya'?

  1. Asupercooled liquid
  2. Bcrystalline solid
  3. Cliquid crystal
  4. Dnone of these
Show answer & explanation

Answer: A) supercooled liquid

Q112. What is the main component used in the manufacture of different types of glass?

  1. Asilica
  2. Bsodium borate
  3. Ccalcium silicate
  4. Dsodium silicate
Show answer & explanation

Answer: A) silica

Q113. small sachet filled with silica gel is often found in bottles of tablets or powdered medicine because silica gel_

  1. ADestroys bacteria.
  2. BDestroys germs and bacteria.
  3. CIt absorbs all the gases present in the bottle.
  4. DAbsorbs moisture
Show answer & explanation

Answer: B) Destroys germs and bacteria.

Q114. Which is the most abundant gas in the atmosphere on the basis of percentage?

  1. Anitrogen
  2. Bcarbon dioxide
  3. Chydrogen
  4. Doxygen
Show answer & explanation

Answer: A) nitrogen

Q115. Nitrogen gas is_

  1. Aheavier than air
  2. Blighter than air
  3. Cequal to air
  4. DAll is false
Show answer & explanation

Answer: B) lighter than air

Q116. When a burning stick is taken to a jar filled with nitrogen, it ___

  1. AAnd it burns brighter.
  2. Bremains unchanged.
  3. Cblows out
  4. Dblows out
Show answer & explanation

Answer: C) blows out

Q117. The semen of bulls is kept for artificial insemination.

  1. Ain liquid ammonia
  2. Bin liquid oxygen
  3. Cin liquid nitrogen
  4. Din liquid hydrogen
Show answer & explanation

Answer: C) in liquid nitrogen

Q118. The main constituent of air is_

  1. Anitrogen
  2. Bcarbon dioxide
  3. Coxygen
  4. Dhydrogen
Show answer & explanation

Answer: A) nitrogen

Q119. In flash bulbs, magnesium wire is kept in whose atmosphere?

  1. Ahydrogen
  2. Boxygen
  3. Cozone
  4. Dnitrogen
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Answer: D) nitrogen

Q120. The gas used in electric bulb is ____

  1. Anitrogen
  2. Bhydrogen
  3. Coxygen
  4. Dnone of these
Show answer & explanation

Answer: A) nitrogen

Q121. The discoverer of nitrogen is-

  1. AChadwick
  2. BRutherford
  3. CRobert Brown
  4. DNewton
Show answer & explanation

Answer: B) Rutherford

Q122. Cryogenic liquid is ____

  1. Aliquid nitrogen
  2. Bliquid ammonia
  3. Cdry ice
  4. DLiquid SO²
Show answer & explanation

Answer: A) liquid nitrogen

Q123. Which of the following elements is required in the largest quantity by growing plants?

  1. Acalcium
  2. Bnitrogen
  3. CIron
  4. DPhosphorus
Show answer & explanation

Answer: B) nitrogen

Q124. Which of the following gases is present in the largest quantity in the air?

  1. ACO²
  2. Bnitrogen
  3. CArgon
  4. Doxygen
Show answer & explanation

Answer: B) nitrogen

Q125. Potato chips are made in plastic bags.

  1. ANitrogen in the atmosphere
  2. Bin a hydrogen atmosphere
  3. Coxygen in the atmosphere
  4. DIodine in the environment
Show answer & explanation

Answer: A) Nitrogen in the atmosphere

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