In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colour is obtained due to the formation of-
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe latest technique for isolation, purification and separation of organic compounds is -
1. Crystallisation
2. Distillation
3. Sublimation
4. Chromatography
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe above reaction is an example of -
1. Nucleophilic substitution reaction
2. Elimination reaction
3. Addition reaction
4. Electrophilic substitution reaction
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIUPAC name of the given compound is
1. 3-Phenylpropane
2. Phenyl-1-butane
3. 2-Benzylethane
4. Propyl benzene
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe method that can be used to separate two compounds with different solubilities in a solvent is-
1. Distillation
2. Isolation
3. Fractional crystallization
4. Filtration
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMethod that can be used to purify the liquid that decomposes on boiling is
1) Fractional distillation
2) Distillation under reduced pressure
3) Steam distillation
4) Distillation
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLassaigne's test can detect -
1. Nitrogen, Sulphur, Halogens
2. Nitrogen, Cyanides, Suphur
3. Sodium, Sulphur, Halogens, Phosphorus
4. Nitrogen, Sulphur, Halogens, Phosphorus
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHalogen in an organic compound that can be detected by -
1. Duma's method
2. Carius method
3. Kjedahl's method
4. Chromatography
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyNitric acid is added to sodium extract before adding silver nitrate for testing halogens because
1. Nitric acid reduces suphide
2. Nitric acid decomposes NaCN and Na2S
3. Nitric acid oxidises the organic compound
4. Nitric acid acts as a dehydrating agent
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 & Biology