Free MCQs & Online Quiz Practice for Exams

Q: All are the raw materials for the manufacturing of urea except

A) CO₂

B) NH₃

C) CH₄

D) NaCl

Q: Percentage of nitrogen in urea is

A) 14%

B) 28%

C) 60%

D) 46%

Q: Blister copper is refined through

A) Concentration

B) Reduction

C) Smelting

D) Electrolysis

Q: Petroleum is separated into different fractions by the process of

A) Simple distillation

B) Condensation

C) Fractional distillation

D) Destructive distillation

Q: All steps are used for the extraction of metals except

A) Roasting

B) Smelting

C) Evaporation

D) Bessemerization

Q: When Sodium Bicarbonate is heated to get sodium carbonate all are produced except

A) CO

B) CO₂

C) Na₂CO₃

D) Froth

Q: Water has the ability to dissolve non polar/covalent compounds due to

A) Ionic forces

B) Dipole-dipole forces

C) Ionic-dipole forces

D) Hydrogen bonding

Q: All salts cause the water become hard except

A) Calcium Chloride

B) Magnesium Sulphate

C) Calcium Bicarbonate

D) Sodium Chloride

Q: The salt which causes temporary hardness in water is

A) Magnesium Sulphate

B) Calcium Chloride

C) Magnesium Chloride

D) Calcium Bicarbonate

Q: Chlorine acts as bleaching agent in the presence of

A) HCl

B) H₂O

C) NaOH

D) HNO₃

Q: Permanent hardness of water is removed by adding

A) Washing Soda

B) Soda lime

C) Caustic Soda

D) Baking Soda

Q: Most of the aquatic animals cannot survive in water above

A) 20°C

B) 25°C

C) 30°C

D) 35°C

Q: The density of water is maximum at

A) -40°C

B) 40°C

C) -4°C

D) 4°C

Q: The disease which causes liver infection is

A) Hepatitis

B) Cholera

C) Typhoid

D) Dysentery

Q: All are waterborne diseases except

A) Hepatitis

B) Malaria

C) Typhoid

D) Dysentery

Q: Water gas is a mixture of

A) CO and H₂

B) C and H₂

C) CO and H₂O

D) C and H₂O

Q: Ozone is present in

A) Mesosphere

B) Thermosphere

C) Stratosphere

D) Troposphere

Q: All are air pollutants except

A) NO₂

B) SO₂

C) SO₃

D) N₂

Q: Which one of the following is responsible for global warming?

A) Increase in concentration of N₂

B) Increase in concentration of CO₂

C) Increase in concentration of O₂

D) Increase in concentration of H₂O vapours

Q: The pH of acid rain is less than

A) 13.6

B) 10.6

C) 7.6

D) 5.6