Chemistry problems
- 1. The monomer of polythene is
Options- A. ethylene
- B. ethyl alcohol
- C. vinyl chloride
- D. ethanol Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: ethylene
- 2. A pure substance can only be
Options- A. Compound
- B. an element
- C. an element or a compound
- D. a heterogeneous mixture Discuss
Correct Answer: an element or a compound
- 3. Cathode rays are
Options- A. electromagnetic wave
- B. stream of alpha particle
- C. stream of electrons
- D. radiations Discuss
Correct Answer: stream of electrons
- 4. Natural radioactivity was discovered by
Options- A. Rutherford
- B. Becquerel
- C. Curie
- D. Schmidt Discuss
Correct Answer: Becquerel
- 5. Formation of cation occurs by
Options- A. gain of electron
- B. loss of electron
- C. gain of proton
- D. loss of proton Discuss
Correct Answer: loss of electron
- 6. In photography, the compound of nitrogen used is
Options- A. Potassium nitrate
- B. Silver nitrate
- C. Ammonium carbonate
- D. Ammonium bicarbonate Discuss
Correct Answer: Silver nitrate
Explanation:
Silver nitrate is the basic substance from which silver bromide is obtained. The photographic films are impregnated with the light sensitive AgBr.
- 7. Van der Waal's equation explains the behaviour of _____
Options- A. Ideal gases
- B. Real gases
- C. Mixture of gases
- D. Diatomic gases Discuss
Correct Answer: Real gases
- 8. Which of the following carbon compounds is used as a fire- extinguisher?
Options- A. Carbon disulphide
- B. Chloroform
- C. Carbon tetrachloride
- D. Methyl ene chloride Discuss
Correct Answer: Carbon tetrachloride
Explanation:
Vapour of carbon tetra chloride is non-inflammable and is heavier than air. Hence it is used as a fire extinguisher under the trade name of pyrene.
- 9. The particle with 13 protons and 10 electrons is
Options- A. Al -atom
- B. Al3+ ion
- C. nitrogen isotope
- D. None of these Discuss
Correct Answer: Al3+ ion
- 10. A device used for the measurement of radioactivity is
Options- A. mass spectrometer
- B. cyclotron
- C. nuclear reactor
- D. G.M.counter Discuss
Correct Answer: G.M.counter
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