A mixture of calcium sulphate and camphor can be separated by-
1. Filtration
2. Evaporation
3. Sublimation
4. Chromatography
A gas among the following that can be absorbed by potassium hydroxide is -
1. | Carbon dioxide | 2. | Silicon dioxide |
3. | Hydrogen | 4. | Carbon monoxide |
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 %
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%
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. \(({CH_3})\overset{+}{C}HCH_2CH_3\)
is more stable than because :
1. | NO2 shows +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 |
Alkyl groups act as electron donors when attached to a π system due to-
1. Inductive effect
2. Mesomeric effect
3. Resonance
4. Hyperconjugation
An electrophile among the following is -
1. | \(\mathrm{OH}^-\) | 2. | \(\mathrm{NC}^-\) |
3. | \(R_3C^-\) | 4. | Carbonyl group |
Elimination reaction among the following is-
1. | CH 3 CH 2 Br + HS - → CH 3 CH 2 SH + Br - | 2. | ( CH 3 ) 2 C = CH 2 + HCl → ( CH 3 ) 2 ClC - CH 3 |
3. | CH 3 CH 2 Br + HO - → CH 2 = CH 2 + Br - + H 2 O | 4. | ( CH 3 ) 3 C - CH 2 OH + HBr → ( CH 3 ) 2 CBrCH 2 CH 3 + H 2 O |