An electron-deficient compound among the following is:

1.	(SiH3)2	2.	(BH3)2
3.	PH3	4.	(CH3)2

Which of the following compounds does not release oxygen when heated?

1. Zn(ClO₃)₂
2. K₂Cr₂O₇
3. (NH₄)₂Cr₂O₇
4. KClO₃

Which of the following is a polar molecule?

The isobutyl group among the following is:

1.
2.	CH3–CH2–CH2–CH2–
3.
4.

A paramagnetic molecule among the following is:

The number of carbon atoms per unit cell of a diamond is:

1. 8

2. 6

3. 1

4. 4

A reaction having equal energies of activation for forward and reverse reaction has:

1. ΔG = 0

2. ΔH = 0

3. ΔH = ΔG = ΔS = 0

4. ΔS = 0