The correct order of energies of molecular orbitals of N2 molecule is:
1.
\( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\)
\(\sigma^* 2 s<\left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma 2 p_z<\sigma^* 2 p_z\)
2.
\( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\sigma^* 2 s<\)
\(\left(\pi 2 p_x=\pi 2 p_y\right)< \)
\(\sigma 2 p_z<\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \)
3.
\( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z<\)
\( \left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \)
4.
\( \sigma \text { 1s }<\sigma^* \text { 1s }\)
\(<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z< \)
\( \sigma^* 2 p_z<\left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right) \)
\(\sigma^* 2 s<\left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma 2 p_z<\sigma^* 2 p_z\)
\(\left(\pi 2 p_x=\pi 2 p_y\right)< \)
\(\sigma 2 p_z<\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \)
\( \left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \)
\(<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z< \)
\( \sigma^* 2 p_z<\left(\pi 2 p_x=\pi 2 p_y\right)<\)
\(\left(\pi^* 2 p_x=\pi^* 2 p_y\right) \)
Subtopic: M.O.T |
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | A reaction can have zero activation energy. |
| Reason (R): | The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Arrhenius Equation |
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Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in the presence of calcium oxide is:
1. 18
2. 16
3. 32
4. 30
1. 18
2. 16
3. 32
4. 30
Subtopic: Carboxylic Acids: Preparation & Properties |
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Subtopic: Aldehydes & Ketones: Preparation & Properties | Carboxylic Acids: Preparation & Properties |
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Select the correct statements from the following:
Choose the correct answer from the option given below:
| A: | Atoms of all elements are composed of two fundamental particles. |
| B: | The mass of the electron is \(9.10939 \times 10^{-31} \mathrm{~kg} \text {. }\). |
| C: | All the isotopes of a given element show same chemical properties. |
| D: | Protons and electrons are collectively known as nucleons. |
| E: | Dalton's atomic theory regarded the atom as an ultimate particle of matter. |
| 1. | B, C and E only | 2. | A, B and C only |
| 3. | C, D and E only | 4. | A and E only |
Subtopic: Introduction |
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The stability of Cu2+ is greater than that of Cu+ salts in an aqueous solution due to:
1. Second ionisation enthalpy
2. First ionisation enthalpy
3. Enthalpy of atomization
4. Hydration energy
1. Second ionisation enthalpy
2. First ionisation enthalpy
3. Enthalpy of atomization
4. Hydration energy
Subtopic: d-Block Elements- Properties & Uses |
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The relation between \(n_m \) (\(n_m \) = number of permissible values of magnetic quantum number (ml) for a given value of azimuthal quantum number (l) is:
1. \(n_m = l+2\)
2. \(l = {n_m -1 \over 2}\)
3. \(l= 2n_m +1\)
4. \(n_m = 2l^2 + 1 \)
1. \(n_m = l+2\)
2. \(l = {n_m -1 \over 2}\)
3. \(l= 2n_m +1\)
4. \(n_m = 2l^2 + 1 \)
Subtopic: Shell & Subshell |
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Intermolecular forces are forces of attraction and repulsion between interacting particles that will be:
Choose the most appropriate answer from the options given below:
1. A, C, D, E are correct
2. B, C, D, E are correct
3. A, B, C, D, E are correct
4. A, B, C, E are correct
| A. | dipole - dipole forces |
| B. | dipole-induced dipole forces |
| C. | hydrogen bonding |
| D. | covalent bonding |
| E. | dispersion forces |
1. A, C, D, E are correct
2. B, C, D, E are correct
3. A, B, C, D, E are correct
4. A, B, C, E are correct
Subtopic: Introduction to States of Matter |
From NCERT
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Homoleptic complex from the following complexes is:
1. Triamminetriaquachromium (III)
2. Potassium trioxalatoaluminate (III)
3. Diamminechloridonitrito-N-platinum (II)
4. Pentaamminecarbonatocobalt (III) chloride
1. Triamminetriaquachromium (III)
2. Potassium trioxalatoaluminate (III)
3. Diamminechloridonitrito-N-platinum (II)
4. Pentaamminecarbonatocobalt (III) chloride
Subtopic: Introduction, Classification and Nomenclature |
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Among the given reactions, which one does not result in the formation of a primary amine as the product?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Amines - Preparation & Properties |
71%
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