________ has the highest electrical conductivity at room temperature.

(a)

Chromium

(b)

Copper

(c)

Silver

(d)

Cadmium

If the standard electrode potential (E^o) of a metal is ________ and __________ the metal is a powerful reducing agent.

(a)

large, negative

(b)

large, positive

(c)

small, negative

(d)

small, positive

Equivalent weight of KMnO₄ in acidic medium is _______.

(a)

3.16

(b)

31.6

(c)

158

(d)

52.67

The common oxidation state of lanthanoids is ________.

(a)

+3

(b)

-3

(c)

0

(d)

+2

_________ is known as Bayer's reagent.

(a)

Hot dilute alkaline KMnO₄

(b)

Cold dilute alkaline KMnO₄

(c)

Hot Conc. acidic KMnO₄

(d)

Cold Conc. acidic KMnO₄