The stability of +1 oxidation state among Al, Ga, In and TI increases in the sequence

• Ga<In< Al<Tl

• Al<Ga<In<Tl

• Tl<In<Ga<Al

• Tl<In<Ga<Al

Oxidation states of P in H₄P₂O_5, H₄P₂O₆, H₄P₂O₇, are respectively

• +3, +5, +4

• +5, +3, +4

• +5, +4,+3

• +5, +4,+3

which of the following oxides is not expected to react with sodium hydroxide?

• B₂O₃

• CaO

• SiO₂

• SiO₂

Strong reducing behaviour of H₃PO₄ is due to

• the presence of one -OH group and two P-H bonds

• high electron gain enthalpy of phosphorous 

• the high oxidation state of phosphorus

• the high oxidation state of phosphorus

Among the following which is the strongest oxidising agent?

• F₂

• Br₂

• I₂

• I₂

The stability of +1 oxidation state increases in the sequence 

• Al < Ga <In < Tl

• Tl < In <Ga< Al

• In < Tl < Ga < Al

• In < Tl < Ga < Al

Which of the following oxide is amphoteric?

• SnO₂

• CaO₂

• SiO₂

• SiO₂

The correct order of increasing bond angles in 

• Cl₂O < ClO₂ < ClO₂^-

• ClO₂ <Cl₂O< ClO₂^-

• Cl₂O < ClO₂^- < ClO₂

• Cl₂O < ClO₂^- < ClO₂

The variation of the boiling point of the hydrogen halides in the order HF >  HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride?

• The electronegativity of fluorine is much higher than for other elements in the group

• There is strong hydrogen bonding between HF molecules

• The bond energy of HF molecules is greater than in other hydrogens halides

• The bond energy of HF molecules is greater than in other hydrogens halides

Match (I) substances with List (II) processes employed in the manufacture of the substances and select the correct option.

• A	B	C	D
  1	4	2	3

• A	B	C	D
  1	2	3	4

• A	B	C	D
  4	3	2	1

• A	B	C	D
  4	3	2	1