Matter

The most reactive metal is
1. iron
2. gold
3. zinc
4. potassium
The liquid metal at room temperature
1. mercury
2. bromine
3. sodium
4. gold
Non-metals are
1. generally liquids
2. generally gases
3. generally solids and gases
4. generally gases and liquids
The metal which is stored in kerosene
1. phophorous
2. magnesium
3. sodium
4. gold
The non-metal which is liquid at room temperature is
1. carbon
2. iodine
3. bromine
4. chlorine
The metal which can be cut with a knife
1. sodium and potassium
2. barium and calcium
3. sodium and mercury
4. potassium and calcium
Which of the following is false for gases?
1. they diffuse easily
2. they have mass
3. they do not mix well
4. they are highly compressible
Which element is used for making filamnets of bulb?
1. iron
2. copper
3. tungsten
4. boron
Which element is used as a fuel for ignition in rockets?
1. iron
2. copper
3. tungsten
4. boron
The smallest unit of substance is called-
1. molecule
2. atom
3. element
4. compound