Chapter 8 ACFs

The process for the extraction of .........is known as Downs Process.

• iron

• magnesium

• lead

• potassium

Alkali metals have .......melting point and boiling point.

• low

• high

• medium

• normal

The ..... of the alkali metals vary from 0.5 g/cm3 to 2 g/cm3.

• masses

• volumes

• densities

• atomic number

......is used as the electrolyte in extraction of sodium.

• fused sodium chloride

• graphite

• iron ring

• chlorine

what is the cathode product in the electrolysis of potassium chloride?

• sodium

• chlorine

• potassium

• water

The oxidation number of the alkali metals in their compound is ........

• 1

• +1

• zero

• -1

What is added for reducing the melting point of the electrolyte.

• sodium chloride

• calcium chloride

• calcium hydroxide

• potassium chloride

The anode is made of ......... in the extraction of sodium.

• iron ring

• platinum

• graphite

• none of these

Sodium is firstly collected by .......

• cathode ring

• annular sodium collector

• hood

• pipe

Sodium is a .......of heat and electricity.

• conductor

• bad conductor

• thermal conductor

• good conductor