In sulphur estimation, 0.157 g of an organic compound gave 0.4813 g of barium sulphate. The percentage of sulphur in the compound is-
1. 39.10 %
2. 48.13 %
3. 42.10 %
4. 52. 43 %
The correct hybridization states of carbon atoms in the following compound are -
1. | C1= sp , C2= sp3 , C3= sp2 | 2. | C1= sp2 , C2= sp3 , C 3 = sp3 |
3. | C1= sp2 , C2= sp2 , C 3 = sp | 4. | C1= sp3 , C2= sp3 , C 3 = sp3 |
The number of σ and π bonds in the molecule are -
1. | 6 C – C sigma ( σ C - C ) bonds, 5 C–H sigma ( ( σ C - H ) bonds, and 3 C=C pi ( π C - C ) |
2. | 6 C – C sigma ( σ C - C ) bonds, 5 C–H sigma ( ( σ C - H ) bonds, and 2 C=C pi ( π C - C ) |
3. | 6 C – C sigma ( σ C - C ) bonds, 6 C–H sigma ( ( σ C - H ) bonds, and 3 C=C pi ( π C - C ) |
4. | 6 C – C sigma ( σ C - C ) bonds, 6 C–H sigma ( ( σ C - H ) bonds, and 2 C=C pi ( π C - C ) |
The correct IUPAC name, among the following, is:
1. | Prop-3-yn-1-ol | 2. | But-4-ol-4-yne |
3. | But-3-ol-2-yne | 4. | But-3-yn-1-ol |
The chiral compound among the following is:
1. | 2-Methylpentanoic acid | 2. | Pentanoic acid |
3. | 4-Methyl pentanoic acid | 4. | None of the above |
Match Column I with Column II.
Column I | Column II |
A. Dumas method | 1. AgNO3 |
B. Kjeldahl’s method | 2. Silica gel |
C. Carius method | 3. Nitrogen gel |
D. Chromatography | 4. Ammonium sulphate |
Codes:
A | B | C | D | |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
Match the type of mixture of compounds in Column I with the technique of separation/purification given in column II.
Column I | Column II |
A. Two solids which have different solubilities in a solvent and which do not undergo a reaction when dissolved in it | 1. Steam distillation |
B. Liquid that decomposes at its boiling point | 2. Fractional distillation |
C. Steam volatile liquid | 3. Crystallisation |
D. Two liquids that have boiling points close to each other | 4. Distillation under reduced pressure |
Codes:
A | B | C | D | |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
The addition of HCl to an alkene proceeds in two steps. The first step is the attack of H+ ion on the double bond portion. The same can be shown as-
1. | 2. | ||
3. | 4. | All of these are possible |
The correct representation involving heterolytic fission of among the following is:
1. | ![]() |
2. | ![]() |
3. | ![]() |
4. | ![]() |
Which carboxylate ion among the following is the most stable?
1. | ![]() |
2. | ![]() |
3. | ![]() |
4. | ![]() |