Top 1000+ Solved Chemistry MCQ Questions Answer

From 496 to 510 of 1421

Q. The smallest particle of an element is called -

a. Ion

b. Electron

c. Atom

d. Molecule

  • c. Atom

Q. There are some substances whose odor changes in acidic or basic media. These are called -

a. Olfactory indicators

b. Litmus indicator

c. Gustatory indicators

d. All of the above

  • a. Olfactory indicators

Q. Which of the following elements has the atomic number greater than that of Phosphorus?

a. Aluminium

b. Silicon

c. Chlorine

d. Magnesium

  • c. Chlorine

Q. If the sewage is fully oxidized, the nitrogen is in the form of –

a. Nitrites

b. Ammonia

c. Nitramines

d. Nitrates

  • d. Nitrates

Q. Which one of the following does not form oxyacid?

a. Sulphur

b. Chlorine

c. Nitrogen

d. Fluorine

  • d. Fluorine

Q. The gas used to extinguish fire is –

a. Neon

b. Nitrogen

c. Carbon dioxide

d. Carbon monoxide

  • c. Carbon dioxide

Q.           is not an allotrope of carbon.

a. Buckminsterfullerene

b. Carbon Doxide

c. Diamond

d. Graphite

  • b. Carbon Doxide

Q. Which hydrocarbons are the major constituents of 'LPG'?

a. Methane and Ethane

b. Propane and Butane

c. Pentane and Benzene

d. Only Methane

  • b. Propane and Butane

Q. The major use of sulphur is in the manufacture of –

a. H2SO4

b. H2S

c. SO2

d. Fungicide

  • a. H2SO4

Q. Which of the following metals has least, melting point?

a. Gold

b. Silver

c. Mercury

d. Copper

  • c. Mercury

Q. Water gas is the combination of –

a. CO and H2

b. CO2 and H2

c. CO and H2O

d. CO2 and CO

  • a. CO and H2

Q. If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?

a. Two million

b. One million

c. Half a million

d. Ten million

  • a. Two million
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