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Metals and Their Compounds

200 MCQ questions with answers and explanations · page 4 of 8

Test yourself▶ 25 question test▶ 50 question test

Q76. Which of the following is an ore of iron?

  1. AHematite
  2. BBauxite
  3. CCinnabar
  4. Dlimestone
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Answer: A) Hematite

Q77. Iron is obtained from which of the following minerals?

  1. Alimestone
  2. BPitch Blend
  3. CMonazite
  4. DHematite
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Answer: D) Hematite

Q78. Which of the following natural substances contains 'Iron' (Fe)?

  1. Achlorophyll
  2. Bcollagen
  3. CCarotene
  4. Dmyoglobin
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Answer: D) myoglobin

Q79. Hemoglobin is present in

  1. AIron
  2. BCopper
  3. CNickel
  4. DCobalt
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Answer: A) Iron

Q80. With which of the following is the tape of a tape recorder coated?

  1. Ablue vitriol
  2. Bferromagnetic powder
  3. Czinc oxide
  4. Dcopper
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Answer: B) ferromagnetic powder

Q81. Which of the following metals does not form amalgam?

  1. Asodium
  2. Bpotassium
  3. Ccopper
  4. DIron
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Answer: D) Iron

Q82. Anemia is caused by the deficiency of which element?

  1. Acopper
  2. BIron
  3. Ccalcium
  4. DMagnesium
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Answer: B) Iron

Q83. Due to the presence of excess amount of which of the following metals, a person gets a disease called cirrhosis?

  1. AIron
  2. Bcopper
  3. Csodium
  4. Dpotassium
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Answer: A) Iron

Q84. Which is the second most abundant metal found in the Earth's crust?

  1. AIron
  2. Baluminum
  3. Caunt
  4. Dzinc
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Answer: A) Iron

Q85. The substance formed during rusting of iron is

  1. Aferric oxide
  2. Bcalcium chloride
  3. Csodium chloride
  4. Dferric and ferrous oxide
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Answer: D) ferric and ferrous oxide

Q86. Which of the following is essential in the corrosion of iron metal?

  1. Aonly oxygen
  2. Boxygen and moisture
  3. CHydrogen only
  4. Dhydrogen and moisture
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Answer: B) oxygen and moisture

Q87. Three factors are necessary for rusting to occur, which are

  1. Ahelium hydrogen nitrogen
  2. Biron, nitrogen and iron
  3. Csteel, iron and oxygen
  4. Diron, oxygen and moisture
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Answer: D) iron, oxygen and moisture

Q88. The chemical composition of rust is

  1. AFeO
  2. BFe²O³
  3. CFe²O³xH²O
  4. DFe³O⁴xH²O
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Answer: C) Fe²O³xH²O

Q89. weight of iron when rusted

  1. Aincreases
  2. Bdecreases
  3. Cno change
  4. Dis converted
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Answer: A) increases

Q90. Paint applied on the surface of iron prevents it from rusting because it

  1. Areacts chemically with iron
  2. BPrevents carbon dioxide from coming into contact with iron
  3. CChanges the rate of chemical reaction of iron
  4. DPrevents oxygen and moisture from coming into contact with the iron
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Answer: D) Prevents oxygen and moisture from coming into contact with the iron

Q91. The important metal used in making rust-free iron is

  1. Aaluminum
  2. BCarbon
  3. CChromium
  4. DTin
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Answer: C) Chromium

Q92. What is the pure form of iron?

  1. Acast iron
  2. Bwrought iron
  3. Ccast iron
  4. DSteel
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Answer: B) wrought iron

Q93. Which metal is added to convert iron into steel?

  1. ARanga
  2. BManganese
  3. CCadmium
  4. DNickel
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Answer: D) Nickel

Q94. Which important metal is used along with iron to prepare stainless steel?

  1. Aaluminum
  2. BChromium
  3. CTin
  4. DCarbon
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Answer: B) Chromium

Q95. It is added to give hardness to steel

  1. Acarbon content
  2. BManganese content
  3. CAmount of silicon
  4. DChromium content
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Answer: A) carbon content

Q96. Which of the following materials is most elastic?

  1. Arubber
  2. Bsteel
  3. Cglass
  4. Dplastic
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Answer: B) steel

Q97. What gets deposited on iron in the process of galvanization?

  1. ACopper
  2. Baluminum
  3. Czinc
  4. DTin
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Answer: C) zinc

Q98. The chemical formula of Green Vitriol is

  1. ACaSO⁴ 2H² O
  2. BCuSO⁴ SH²O
  3. CFSO⁴ TH²O
  4. DZnSO⁴TH²O
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Answer: C) FSO⁴ TH²O

Q99. Which process is not beneficial to prevent rusting of ore?

  1. AAnnealing
  2. Bgrease
  3. Czinc plating
  4. Dto paint
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Answer: A) Annealing

Q100. The chemical formula of Mohr's Salt is

  1. AK²SO⁴AL ²(SO⁴)³ 24H²0
  2. BFeO⁴ (NH⁴)²SO² 24H²0
  3. CNaNH⁴HPO⁴ H²O
  4. DNa² B⁴O⁷10H ²O
Show answer & explanation

Answer: B) FeO⁴ (NH⁴)²SO² 24H²0

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