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51
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
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Answer: Option C
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52
Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?
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Answer: Option A
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53
Adhesives
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Answer: Option D
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54
The most commonly used material for sewers for carrying sewage in the normal situation is
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Answer: Option C
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55
In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
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Answer: Option A
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56
Ageing of steel refers to the
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Answer: Option C
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57
The main reducing agent in iron blast furnace is
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Answer: Option B
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58
Main constituent of bone ash is
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Answer: Option B
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59
pH value of rain water in India ranges from
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Answer: Option A
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60
Slight displacement of a floating body in liquid makes it to oscillate about its
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Answer: Option C
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