The reason why we fuse an organic compound with metallic sodium for testing nitrogen, sulphur, and halogens is -
1. To convert all compounds to their ionic form
2. Sodium reduces the compounds
3. Sodium converts all compounds in their covalent form
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology0.3780 grams of an organic chloro compound gave 0.5740 grams of silver chloride in Carius
estimation. % of chlorine present in the compound is -
1. 25%
2. 37.59%
3. 42%
4. 05.70 %
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the Carius method, 0.468 grams of an organic sulphur compound gives 0.668 grams of barium sulphate. The percentage of sulphur in the given compound is -
1. 19.59%
2. 25.40%
3. 09.24%
4. 27.59%
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn organic compound contains 69% carbon, and 4.8% hydrogen, the remainder being
oxygen. The masses of carbon dioxide, and water produced when 0.20 g of this substance is subjected to complete combustion would be respectively -
1. 0.506 g , 0.0864 g
2. 0.906 g , 0.0864 g
3. 0.0506 g , 0.864 g
4. 0.0864 g, 0.506 g
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA sample of 0.50 g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50 mL of 0.5 M . The residual acid required 60 mL of 0.5 M solution of NaOH for neutralization. Percentage composition of nitrogen in the compound is -
1. 52%
2. 51%
3. 56 %
4. 54 %
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA characteristic feature of any form of chromatography is the ___
1. Use of molecules that are soluble in water.
2. Use of inert carrier gas.
3. Calculation of an Rf value for the molecule separated.
4. Use of a mobile and a stationary phase.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology