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71
Plaster of Paris is obtained by calcining
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Answer: Option B
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72
Which of the following is a mineral?
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Answer: Option C
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73
Which of the following timbers is suitable for making sports goods?
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Answer: Option A
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74
Stones used for the construction of retaining walls must be
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Answer: Option D
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75
Invar contains
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Answer: Option D
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76
Calcination of iron ores is done
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Answer: Option D
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77
The size of mould for bricks, is generally kept
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Answer: Option A
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78
The foliated structure is very common in
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Answer: Option C
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79
The rocks formed by gradual deposition, are called
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Answer: Option A
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80
The specific gravity of marble, is
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Answer: Option D
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