PSC MODEL QUESTION PAPER 16

The glass used to make thermometers

Pyrex glass

Impure camphor is purified by

Sublimation

Diesel oil is preferred for heavy motor vehicles because

Of its higher efficiency and fuel economy

The compound of copper which is a constituent of Bordereaux mixture

Copper sulphate

The red colour of mars is due to

Ferric oxide

The bubbles in champagne are

Carbone dioxide

Which of the following metal tat show acidic and basic character?

Aluminum

Chemical property of a metal is determined by

Electrons

Which is added to petrol in cold countries to avoid freezing

Ethylene glycol

Natural rubber is a polymer of

Isoprene

Element essential for the functioning of thyroid gland

Iodine

The setting of plaster    of Paris involves which among the following process?

Hydration

Which of the following is a common constituent of transistor

Titanium dioxide

Which element has the second highest capacity for oxidation

Oxygen

Substance used for making artificial heart valve

Teflon

The hydrocarbon used for dry cleaning

Benzene

The nitrogen compound used as both fertilizer and explosive

Ammonium nitrate

Lead chromatic impacts ---- colour to rubber products

Yellow

Which is silicate mineral  of aluminum and fluorine

Topaz