A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. . The evolved gaseous mixture is passed through KOH pellets.
Weight (in g) of the remaining product at STP will be:
1. 1.4
2. 3.0
3. 2.8
4. 4.4
The nitration of aniline in a strong acidic medium results in the formation of m-nitroaniline because:
| 1. | In spite of substituents, the nitro group always goes to only the m-position. |
| 2. | In electrophilic substitution reactions, the amino group is meta-directive. |
| 3. | In the absence of substituents, the nitro group always goes to only m-position. |
| 4. | In an acidic (strong) medium, aniline is present as an anilinium ion. |
The difference between amylose and amylopectin is:
| 1. | Amylopectin has 1→4 α - linkage and 1→6 α-linkage. |
| 2. | Amylose has 1→4 α-linkage and 1 → 6 β-linkage. |
| 3. | Amylopectin has 1 → 4 α-linkage and 1 → 6 β-linkage. |
| 4. | Amylose is made up of glucose and galactose. |
Incorrect statement regarding cross-linked or network polymers is:
| 1. | They contain covalent bonds between various linear polymer chains. |
| 2. | They are formed from bi and tri functional monomers. |
| 3. | Examples are bakelite and melamine. |
| 4. | They contain strong covalent bonds in same polymer chain. |
1. Dichloromethyl cation \((^{+}CHCl_{2})\)
2. Formyl cation \((^{+}CHO)\)
3. Dichloromethyl anion \((^{-}CHCl_{2})\)
4. Dichlorocarbene (:CCl2)
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to:
| 1. | Formation of intramolecular H-bonding |
| 2. | Formation of carboxylate ion |
| 3. | More extensive association of carboxylic acid via van der waals force of attraction |
| 4. | Formation of intermolecular H-bonding |
Compound A, is found to react with NaOI (produced by reacting Y with NaOH) and yield a yellow precipitate with a characteristic smell. A and Y are respectively?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
The correct statement among the following is:
| 1. | the rate of a first-order reaction does not depend on reactant concentration; the rate of a second-order reaction does depend on reactant concentrations. |
| 2. | the half-life of a first-order reaction does not depend on [A]o; the half-life of a second-order reaction does depend on [A]0 |
| 3. | a first-order reaction can be catalyzed; a second-order reaction cannot be catalyzed. |
| 4. | the rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations |
| 1. | BeH2 < CaH2 < BaH2 | 2. | CaH2 < BeH2 < BaH2 |
| 3. | BeH2 < BaH2 < CaH2 | 4. | BaH2 < BeH2 < CaH2 |
© 2026 GoodEd Technologies Pvt. Ltd.