Top 1000+ Solved Chemistry MCQ Questions Answer

From 241 to 255 of 1421

Q. Which of the following gases is mixed with oxygen for breathing by divers in aqualungs?

a. Methane

b. Nitrogen

c. Helium

d. Hydrogen

  • b. Nitrogen

Q. The material known in commerce as Terylene is a –

a. Synthetic fibre

b. Natural fibre

c. Modified natural fibre

d. Blend of cotton and silk

  • a. Synthetic fibre

Q. Among the fuels given below, the one with highest calorific value is –

a. Coke

b. Coal

c. Wood

d. Natural gas

  • d. Natural gas

Q. Electric bulbs are filled with –

a. Nitrogen

b. Carbon dioxide

c. Argon

d. Oxygen

  • c. Argon

Q. The purest form of Iron is :

a. Cast iron

b. Steel

c. Pig iron

d. Wrought iron

  • d. Wrought iron

Q. Which of the following metals are present in hemoglobin and chlorophyll, respectively?

a. Fe and Mg

b. Fe and Zn

c. Mg and Zn

d. Zn and Mg

  • a. Fe and Mg

Q. Silver halides are used in photographic plates because they are -

a. oxidised in air

b. soluble in hyposolution

c. reduced by light

d. totally colourless

  • c. reduced by light

Q. Tetra ethyle lead (TEL) is -

a. a catalyst in burning fossil fuel

b. an antioxidant

c. areductant

d. an antiknock compound

  • d. an antiknock compound

Q. Which metal is heaviest -

a. osmium

b. mercury

c. iron

d. nickel

  • a. osmium

Q. The term PVC used in the plastic industry stands for -

a. polyvinyl chloride

b. polyvinyl carbonate

c. phosphor vanadium chloride

d. phosphavinyl chloride

  • a. polyvinyl chloride

Q. Rusting of iron takes place due to –

a. oxidation

b. carbonation

c. exfoliation

d. corrosion

  • a. oxidation

Q. German silver used for making utensils is an alloy of –

a. Copper, silver, nickel

b. Copper, zinc, nickel

c. copper, zinc, aluminium

d. copper, nickel, aluminium

  • b. Copper, zinc, nickel

Q. Sour milk contains –

a. acetic acid

b. tartaric acid

c. citric acid

d. lactic acid

  • d. lactic acid

Q. The acid used in lead storage cells is –

a. phosphoric acid

b. hydrochloric acid

c. nitric acid

d. sulphuric acid

  • d. sulphuric acid
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