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51
Tooth enamel is made up of which one of the following calcium compounds?
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Answer: Option D
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52
Which one of the following colours is supplied by Sodium Chromate?
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Answer: Option B
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53
Which one of the following metals is accessed in the native state?
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Answer: Option B
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54
A combustible gas is liberated when caustic soda solution is heated with
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Answer: Option D
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55
Chemically 'Plaster of Paris' is
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Answer: Option A
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56
Fill in the blanks using the correct option for the following statements from the given alternatives. On heating the . . . . . . . ., a plaster of Paris is obtained.
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Answer: Option C
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57
Which of the following compounds is used in gun powder?
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Answer: Option B
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58
. . . . . . . . is never found as a free element in nature.
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Answer: Option A
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59
The most abundant metal in the earth's crust is
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Answer: Option C
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60
Doctors, Artists and Sculptors use Calcium Sulphate which is popularly known as
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Answer: Option D
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