Chemistry Quiz

Which one of the following is not used to dope a semiconductor ?

• Al

• B

• In

• Au

The macro-nutrient provided by inorganic fertilization are ?

• C, Fe, B

• C, N, P

• N, P, K

• Mg, Zn, Fe

Which of the Carbon Compounds is used as fire extinguisher ?

• CS₂

• CHCl₃

• CH₃Cl

• CCl₄

Heavy metal pollution of water is caused by ?

• Acid Plants

• Paints

• Wood Burning

• Domestic Sewage

Supersonic Aircrafts discharge the following substance into the statosphere:

• SO₂

• CO₂

• NO₂

• CO

Atmosphere contains dust particles, salt grains, pollen grains, smoke, etc. which are collecctively known as?

• Water vapour

• Ozone

• Aerosols

• CFC

When water is added to anhydrous white copper sulphate, the color will change to :

• Yellow

• Green

• Blue

• Red

Due to rusting the weight of iron?

• Decrease

• Increases

• Remains the same

• Uncertain

The material that can be deformed permanently by heat and pressure is called ?

• Thermoset

• Thermoplastic

• Chemical Compound

• Polymer

The oil used in the froth floatation process is?

• Pine oil

• Coconut oil

• Olive oil

• Kerosene