Write True or False for the following statements:

(a) Silver is used to make electric cables.

(b) Iodine acts as an antiseptic in the form of tincture of iodine.

(c) Sodium can be cut with a knife.

(d) Antimony is a metal.

(e) Sand is an oxide of silicon.

The noble gas used in advertising signboards is:

1. Helium
2. Neon
3. Argon
4. Krypton

A metal which is neither ductile nor malleable is:

1. Copper
2. Silver
3. Zinc
4. Aluminium

Rust is a hydrated oxide of iron which is:

1. Reddish brown
2. Green
3. White
4. Black