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41
What is the chemical formula of gypsum?
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Answer: Option D
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42
Another name for Neela Thotha is-
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Answer: Option A
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43
Match List-I with List-II and select the correct answer:
List-I (Industrial Process) List-II (Industry)
a. Cracking 1. Rubber
b. Smelting 2. Petroleum
c. Hydrogenation 3. Copper
d. Vulcanization 4. Edible Fats
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Answer: Option B
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44
Which of the following compounds does not contain crystallization water?
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Answer: Option A
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45
What is the chemical name of chalk?
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Answer: Option C
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46
To neutralize the effect of formic acid injected by ant bite, which among the following can be used?
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Answer: Option D
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47
What are the components of soldering?
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Answer: Option A
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48
Which of the following is most malleable metal?
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Answer: Option B
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49
Which of the following metals reacts quickly with cold water?
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Answer: Option A
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50
Which of the following is not easily oxidized (burns) at high temperatures?
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Answer: Option D
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