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41
Which one of the following statements is correct?
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Answer: Option B
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42
The first metal used by man was
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Answer: Option C
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43
Gas produced with the reaction of the soda with hydrochloric acid.
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Answer: Option C
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44
Malachite is an ore of . . . . . . . .?
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Answer: Option A
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45
Which of the following is lighter than water?
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Answer: Option B
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46
Which of the following soil types is rich in soil nutrients such as calcium carbonate, magnesium, potash and lime?
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Answer: Option A
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47
Which one of the following is a Nobel metal?
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Answer: Option B
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48
Which one of the following is not true for bleaching powder?
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Answer: Option A
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49
Which of the following substances appears shiny?
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Answer: Option B
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50
Magnesium ribbon burns with a shiny . . . . . . . . flame-
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Answer: Option A
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