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71
Which of the following is not a form of Calcium Carbonate?
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Answer: Option B
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72
Match List-I with List-II and select the correct answer:
List-I (Naturally occurring substance) List-II (Elements present)
a. Diamond 1. Calcium
b. Marble 2. Silicon
c. Sand 3. Aluminium
d. Ruby 4. Carbon
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Answer: Option D
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73
Zinc can separate copper from copper sulphate solution, because zinc-
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Answer: Option C
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74
Gold is soluble in which of the following:
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Answer: Option C
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75
Sodium calcium silicate is called . . . . . . . .
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Answer: Option C
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76
Choose odd from the following.
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Answer: Option D
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77
How many water molecules are present in a molecule of ferrous sulphate crystal?
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Answer: Option D
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78
. . . . . . . . atoms are present in sodium carbonate molecule.
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Answer: Option A
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79
What is the chemical formula of bleaching powder?
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Answer: Option B
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80
Which of the following reactions removes the highly reactive metals from the pure molten ore?
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Answer: Option B
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