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AIIMS 2015 Chemistry Question Paper for free online practice with solutions

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Question : 17

Total: 60

When a substance ‘A’ reacts with water, it produces a combustible gas ‘B’and a solution of substance ‘C’ in water, while another substance ‘D’ reacts with solution of ‘C’ to produce the same gas B on warming while ‘D’ can produce gas ‘B’ on reaction with dilute H2SO4 at room temperature. ‘A’imparts a deep golden yellow colour to a smokeless flame on Bunsen burner.Identify ‘A’, ‘B’, ‘C’ and ‘D’ respectively are

K,H2,KOH,Al
Na,H2,NaOH,Zn
CaC2,C2H2,Ca(OH)2,Fe
Ca,H2,Ca(OH)2,Sn

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