The correct order for boiling points of the following compounds is:
1. | AsH3 > PH3 > NH3 > SbH3 > BiH3 |
2. | BiH3 > SbH3 > NH3 > AsH3 > PH3 |
3. | NH3 > PH3 > AsH3 > SbH3 > BiH3 |
4. | PH3 > NH3 > AsH3 > SbH3 > BiH3 |
Match List-I with List-II:
List-I | List-II | ||
(a) | 4.48 litres of O2 at STP | (i) | 0.2 moles |
(b) | 12.022 × 1022 molecules of H2O | (ii) | 12.044 × 1023 molecules |
(c) | 96 g of O2 | (iii) | 6.4 g |
(d) | 88 g of CO2 | (iv) | 67.2 litres at STP |
(a) | (b) | (c) | (d) | |
1. | (i) | (iii) | (iv) | (ii) |
2. | (iii) | (i) | (iv) | (ii) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (iii) | (i) | (ii) | (iv) |
Given below are two statements:
Statement I: | \(\alpha\)-hydrogen undergo aldol condensation in the presence of dilute alkali as catalyst. | Aldehydes and ketones having at least one
Statement II: | When aldol condensation is carried out between two different aldehydes, it is called cross aldol condensation. Ketones do not give this reaction. |
In light of the above statements, choose the most appropriate answer from the options given below:
1. | Statement I is correct and Statement II is incorrect. |
2. | Statement I is incorrect and Statement II is correct. |
3. | Both Statement I and Statement II are correct. |
4. | Both Statement I and Statement II are incorrect. |
Match List-I with List-II:
List-I Elements |
List-II Atomic radii (pm) |
||
(a) | O | (i) | 88 |
(b) | C | (ii) | 74 |
(c) | B | (iii) | 66 |
(d) | N | (iv) | 77 |
(a) | (b) | (c) | (d) | |
1. | (ii) | (i) | (iv) | (iii) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (i) | (iv) | (iii) | (ii) |
4. | (iii) | (iv) | (i) | (ii) |
The correct reaction among the following is:
1. | |
2. | |
3. | |
4. |
The number of bridging carbonyl groups in [Co2(CO)8] and [Mn2(CO)10], respectively are:
1. | 2 and 0 | 2. | 2 and 2 |
3. | 2 and 4 | 4. | 0 and 2 |
LiF is sparingly soluble in water because it has:
1. partial covalent character.
2. small electronegativity.
3. high lattice enthalpy.
4. low hydration enthalpy.
Match list-I with list-II:
List-I (Commercial name) |
List-II (Chemical name) |
||
(a) | Calgon | (i) | Sodium aluminium silicate (hydrated) |
(b) | Permutit | (ii) | Sodium carbonate |
(c) | Soap | (iii) | Sodium hexameta-phosphate |
(d) | Washing soda | (iv) | Sodium stearate |
Choose the correct answer from the options given below:
(a) | (b) | (c) | (d) | |
1. | (i) | (iv) | (ii) | (iii) |
2. | (iii) | (i) | (iv) | (ii) |
3. | (ii) | (iii) | (iv) | (i) |
4. | (iv) | (iii) | (i) | (ii) |
For the reaction, 2A → B, rates= k[A]2. If the concentration of reactant is doubled, then the:
(a) | rate of reaction will be doubled. |
(b) | rate constant will remain unchanged, however rate of reaction is directly proportional to the rate constant. |
(c) | rate constant will change since the rate of reaction and rate constant are directly proportional to each other. |
(d) | rate of reaction will increase by four times. |
Identify the set of correct statements & choose the correct answer from the options given below:
1. | (a) and (c) only | 2. | (a) and (b) only |
3. | (b) and (d) only | 4. | (c) and (d) only |
Match list-I with list-II:
List-I (Monomers) |
List-II (Polymers) |
||
(a) | Caprolactam | (i) | Bakelite |
(b) | Ethylene glycol and Benzene-1, 4-dicarboxylic acid | (ii) | Nylon 6, 6 |
(c) | Hexamethylenediamine and adipic acid | (iii) | Nylon-6 |
(d) | Phenol and Formaldehyde | (iv) | Terylene |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (iv) | (i) |
2. | (i) | (ii) | (iii) | (iv) |
3. | (iii) | (iv) | (ii) | (i) |
4. | (iv) | (ii) | (i) | (iii) |