The hydride of group 16 having highest boiling point is:

1. H₂O because of H-bonding

2. H₂Te because of higher molecular weight

3. H₂S because of H-bonding

4. H₂Se because of lower molecular weight

Which of the following is correct :-

(1) Extent of hydration is PCl₅ > SiCl₄ and BCl₃ < CCl₄

(2) K⁺ ion will be more Hydrated than Li⁺

(3) In BCl₃ there are no vacant d-orbitals but still it can undergo expansion

(4) None

The correct order in which the O-O bond length increases in the following is

1. H₂O₂ < O₂ < O₃

2. O₃ < H₂O < O₂

3. O₂ < O₃< H₂O₂

4. O₂ < H₂O₂ < O₃

Carbon suboxide (C₃O₂) has

1. Linear structure

2. Bent structure

3. Trigonal structure

4. Disorted tetrahedral structure

Select the correct order of solubility (in water) from the following:

1. SrSO₄ < CaSO₄ < MgSO₄ < BeSO₄

2. NaF < KF < RbF < CsF

3. Ba(OH)₂ > Sr(OH)₂ > Ca(OH)₂ > Mg(OH)₂

4 All of the above

Which has highest bond angle ?

(1) NH₃

(2) H₂O

(3) H₂S

(4) PH₃

In which case observed dipole moment is greater than theoretical dipole moment?

1.
2.
3.
4.

Which molecules/ions are most paramagnetic?

1. B₂

2. C₂

3. ${\mathrm{O}}_2^{+}$

4. ${\mathrm{O}}_2^{-}$

In a chemical change from ${\mathrm{PCl}}_3 \stackrel{ }{\to }{\mathrm{PCl}}_5$, the hybrid state of P changes from:
1. sp² to sp³
2. sp³ to sp²
3. sp³ to sp³d
4. sp³ to dsp²

A sbonded molecule MX₃ is T-shaped. The number of non-bonding pairs of electrons is :

1. 0

2. 2

3. 1

4. Can be predicted only if atomic number of M is known,