0.3780 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 %

Subtopic:  Quantitative Analysis of Organic Compounds |
 75%
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In 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%

Subtopic:  Quantitative Analysis of Organic Compounds |
 65%
From NCERT
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The most stable carbocation among the following is-
1. \(({CH_3})_3C\overset{+}{C}H_2\)
2. \(({CH_3})_3\overset{+}{C}\)
3. \({CH_3}CH_2\overset{+}{C}H_2\)
4. \(({CH_3})\overset{+}{C}HCH_2CH_3\)

Subtopic:  Electron Displacement Effects |
 81%
From NCERT
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O2NCH2CH2O- is more stable than CH3CH2O- because :

1. NOshows +I effect
2. NO2 shows -I effect
3. NO2 decreases the positive charge on the compound
4. Ethyl group increases positive charge on the compound

Subtopic:  Electron Displacement Effects |
 87%
From NCERT
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Alkyl groups act as electron donors when attached to a π system due to-
1. Inductive effect
2. Mesomeric effect
3. Resonance
4. Hyperconjugation

Subtopic:  Electron Displacement Effects |
From NCERT
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An electrophile among the following is -

1. \(\mathrm{OH}^-\) 2. \(\mathrm{NC}^-\)
3. \(R_3C^-\) 4. Carbonyl group
Subtopic:  Nucleophile & Electrophile |
 71%
From NCERT
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Geometrical isomerism can be shown by:

1.
2.
3.
4.
Subtopic:  Stereo Isomers |
 88%
From NCERT
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Free radical formation will take place in :

1.
2.
3.
4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 86%
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The effect that can explain the given order of acidity of the carboxylic acids is-

Cl3CCOOH > Cl2CHCOOH > ClCH2COOH

1. +I effect

2. -I effect

3. +E effect

4. -E effect

Subtopic:  Electron Displacement Effects |
 90%
From NCERT
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The purification method based on the difference in solubilities of the compound and the impurities in a solvent is -
1. Crystallisation
2. Distillation
3. Chromatography
4. Isolation

Subtopic:  Purification of Organic Compounds |
 68%
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