The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes
CoCl3.6NH3, CoCl3.5NH3, CoCl3.4NH3 respectively is:
| 1. | 3AgCl, 1AgCl, 2AgCl | 2. | 3AgCl, 2AgCl, 1AgCl |
| 3. | 2AgCl, 3AgCl, 1AgCl | 4. | 1AgCl, 3AgCl, 2AgCl |
The correct statement regarding electrophile is :
| 1. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile |
| 2. | Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile |
| 3. | Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile |
| 4. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile |
A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5atm from an initial volume of 2.50 L to a final volume of 4.50L. The change in internal energy U of the gas in joules will be:
| 1. | –500J | 2. | –505J |
| 3. | –506J | 4. | –508J |
Mark the correct reaction among the following to convert acetamide to methenamine:
1. Hoffmann bromamide reaction
2. Stephens reaction
3. Gabriels phthalimide synthesis
4. Carbylamine reaction
With respect to the conformers of ethane, which of the following statements is true?
| 1. | Bond angle changes but bond length remains the same. |
| 2. | Both bond angle and bond length change. |
| 3. | Both bond angle and bond length remain the same. |
| 4. | Bond angle remains the same but the bond length changes. |
The correct statement among the following is :
| 1. | Sn2+ is an oxidizing agent while Pb4+ is a reducing agent. |
| 2. | Sn2+ and Pb2+ both are oxidizing agents. |
| 3. | Sn4+ is a reducing agent while Pb4+ is an oxidizing agent. |
| 4. | Sn2+ is a reducing agent while Pb4+ is an oxidizing agent. |
The correct increasing order for the wavelengths of absorption in complexes of Co3+ is:
1. [Co(H2O)6]3+ < [Co(en)3]3+ < [Co(NH3)6]3 +
2. [Co(H2O)6]3+ < [Co(NH3)6]3+ < [Co(en)3]3+
3. [Co(NH3)6]3+ < [Co(en)3]3+ < [Co(H2O)6]3+
4. [Co(en)3]3+ < [Co(NH3)6]3+ < [Co(H2O)6]3+
A, X, Y, and Z in the above-mentioned reaction are:
| A | X | Y | Z | |
| 1. | Methoxy- methane |
Ethanol | Ethanoic acid | Semicarbazone |
| 2. | Ethanal | Ethanol | But - 2 - enal | semicarbazone |
| 3. | Ethanol | Acetaldehyde | Butanone | Hydrazone |
| 4. | Methoxy- methane |
Ethanoic acid | Acetate | Hydrazine |
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