Engineering Chemistry I Mock Test 1

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Question 1 of 10

1. The molecular orbital electronic configuration of HF molecule is _________

1s² 2s² σ_spx² [2_px⁴] σ_spx*

1s² 2s² σ_spx² [2_px² 2_py²] σ_spx*

1s² 2s² σ_spx² [2_px² 2_pz²] σ_spx*

1s² 2s² σ_spx² [2_py² 2_pz²] σ_spx*

Question 1 of 10

Question 2 of 10

2. The exhausted anion exchangers can be regenerated by working with __________

Acid solution

Alcohol solution

Alkali solution

Water

Question 2 of 10

Question 3 of 10

3. The necessary condition for showing optical activity is the chirality of a molecule as a whole.

False

True

Question 3 of 10

Question 4 of 10

4. The relative energies of molecular orbitals in increasing order have been found to be as follows.
(σ_1s) < (σ*_1s) < (σ_2s) < (σ*_2s) < [(π_2py)(π_2pz)] < (σ _2px) < [(π*_2py)(π*_2pz)] < (σ*_2px)

For H₂ to Ne₂

For N₂ to Ne₂

For H₂ to N₂

For O₂ to Ne₂

Question 4 of 10

Question 5 of 10

5. Which orbital would form a more stronger bond if both of them have identical stability?

The one which is less directionally concentrated

Both will be equally strong

It differs from atom to atom

The one which is more directionally concentrated

Question 5 of 10

Question 6 of 10

6. The Valence Bond Theory does not explain the paramagnetic nature of oxygen molecule.

True

False

Question 6 of 10

Question 7 of 10

7. Optical activity is the property in which a substance is unable to rotate the plane of polarisation.

True

False

Question 7 of 10

Question 8 of 10

8. Calculate the number of σ and π bonds in cyclohexadiene. (C₆H₈)

σ bond = 14, π bond = 2

σ bond = 12, π bond = 4

σ bond = 12, π bond = 2

σ bond = 2, π bond = 14

Question 8 of 10

Question 9 of 10

9. Chiral molecules are those which are?

Shows geometrical isomerism

Unstable molecules

Not superimposable on their mirror images

Superimposable on their mirror images

Question 9 of 10

Question 10 of 10

10. To avoid excessive high value of molecular rotation, concentration is taken as _________

1 mole/mL

1 centi-mole/mL

1 milli-mole/mL

1 kilo-mole/mL

Question 10 of 10