- 1(current)
Q. No.The catalyst that is used in the contact process is:
| 1. | Fe2O3 | 2. | Al2O3 |
| 3. | V2O5 | 4. | SO3 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe chemical formula of oleum is -
| 1. | H2S2O8 | 2. | H2S2O7 |
| 3. | H3S2O6 | 4. | H2SO5 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe electron gain enthalpy values for O → O– and O → O2– are –141 and 702 kJ mol-1 , respectively. The correct statement about the formation of oxides is-
| 1. | Higher the electron gain enthalpy lower is the lattice energy. |
| 2. | Higher the electron gain enthalpy higher is the lattice energy. |
| 3. | Higher the electron gain enthalpy higher is the stability of oxide. |
| 4. | O- is more stable than O2- |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA chemical that depletes the ozone layer is:
1. Sulphur
2. Chlorofluorocarbons (CFCs)
3. Nitrogen
4. Hydrogen
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOxygen forms hydrogen bonds while chlorine does not, because :
| 1. | Chlorine has a bigger size and as a result, a higher electron density per unit volume. |
| 2. | Oxygen has a smaller size and as a result, a lower electron density per unit volume. |
| 3. | Oxygen has a smaller size and as a result, a higher electron density per unit volume. |
| 4. | Oxygen has a bigger size and as a result, a higher electron density per unit volume. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyOxygen exists as gas and sulphur exists as a solid because:
1. Oxygen is less electronegative than sulphur.
2. Sulphur is smaller than oxygen molecule.
3. Sulphur has a tendency to form pπ-pπ bonds.
4. Oxygen has a tendency to form pπ-pπ bonds.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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