Which of the following is commonly used to produce foam in froth floatation process?

(a)

Pine oil

(b)

Cresol

(c)

NaCN

(d)

Xanthate

The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.

(a)

TI < In < Ga < Al

(b)

In < TI < Ga < Al

(c)

Ga < In < Al < TI

(d)

Al < Ga < In < TI

Which of the following halides of group 15 is not hydrolysed?

(a)

NF₃

(b)

PF₃

(c)

NI₃

(d)

Both (a) and (b)

Which of the following is wrong with respect to lanthanide contraction?

(a)

Decrease in ionic radii

(b)

Increase in tendency to act as reducing agents

(c)

Decrease in basic character

(d)

Resembles second and third row of d-block elements

The total number of electrons donated by ligands to platinum ion in [Pt(en)₂CI₂] is _______.

(a)

8

(b)

10

(c)

12

(d)

14

Which of the following cannot be regarded as molecular solid?

(a)

Silicon carbide

(b)

AIN

(c)

Diamond

(d)

All the above

For a reaction, 2A + B ⟶ 3C, The rate of appearance of C at time 't' is 1.2 x 10^-4 mol L^-1s^-1. Identify the rate of reaction.

(a)

4 x 10^-5mol L^-1s^-1

(b)

4.5 x 10^-1mol L^-1s^-1

(c)

3.6 x 10^-4 mol L^-1s^-1

(d)

None of these

Recharging of lead storage battery involves ______.

(a)

anode is reduced to pb

(b)

cathode is reduced to pb

(c)

cathode is oxidised to pb

(d)

anode is oxidised to pbO₂

Which of the following is true regarding Freundlich adsorption isotherm equation?

(a)

Purely empirical

(b)

Valid only over a limited pressure range

(c)

The value of constants k and n varies with temperature

(d)

All the above

Which among the following sets of reactants will produce anisole?

(a)

HCHO, RMgX

(b)

(c)

C₆H₅ONa, CH₃Br

(d)

C₆H₅CH₃, CH₃CoCI