When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of Bunsen burner.
The substance A, B, C and D, respectively are:
1. K, , NaOH, Zn
2. Na, NaOH, , Zn
3. Li, , LiOH, Zn
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe most convenient method to protect the bottom of the ship made of iron is:
1. Coating it with Red lead oxide.
2. White tin plating.
3. Connect it with the Mg block.
4. Connect it with the Pb block.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA solid compound 'X' on heating gives CO2 gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of CO2 through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology