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Chemistry - Chemical Reactions and Equations

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61. When a burning splinter is brought near the gas jar containing hydrogen gas, a popping sound is observed. It is due to (NTSE Chandigarh, Stage-I, 2015-16)

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62. Silver chloride turns grey when placed in sun because of the formation of (NTSE Chandigarh, Stage-I, 2015-16)

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63. When copper sulphate solution reacts with iron metal, copper metal is formed. This reaction comes under which of the following category? (NTSE Chandigarh, Stage-I, 2015-16)

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64. Which of the following method is suitable for preventing an iron frying pan from rusting? (NTSE Chandigarh, Stage-I, 2015-16) (NTSE Jharkhand, Stage-I, 2015-16)

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65. Which of the following reactions requires the highest temperature to occur? (NTSE Kerala, Stage-I, 2016-17)

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