Discussion
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- Question
Natural radioactivity was discovered by
Options- A. Rutherford
- B. Becquerel
- C. Curie
- D. Schmidt
- Correct Answer
- Becquerel
- 1. Cathode rays are
Options- A. electromagnetic wave
- B. stream of alpha particle
- C. stream of electrons
- D. radiations Discuss
- 2. A pure substance can only be
Options- A. Compound
- B. an element
- C. an element or a compound
- D. a heterogeneous mixture Discuss
- 3. The monomer of polythene is
Options- A. ethylene
- B. ethyl alcohol
- C. vinyl chloride
- D. ethanol Discuss
- 4. Orlon is a polymer of
Options- A. Dacron
- B. Acrylonitrile
- C. Polyamide Nylon
- D. None of the above Discuss
- 5. Select the correct statement (s).
Options- A. When energy is transferred to the system from the surrounding as work, the surrounding do work on the system and the value of work (W) positive.
- B. When energy is transferred from the system to the surrounding as work, work is done on the surrounding and the value of W is negative.
- C. Both (A) and (B)
- D. None of the above Discuss
- 6. Formation of cation occurs by
Options- A. gain of electron
- B. loss of electron
- C. gain of proton
- D. loss of proton Discuss
- 7. In photography, the compound of nitrogen used is
Options- A. Potassium nitrate
- B. Silver nitrate
- C. Ammonium carbonate
- D. Ammonium bicarbonate Discuss
- 8. Van der Waal's equation explains the behaviour of _____
Options- A. Ideal gases
- B. Real gases
- C. Mixture of gases
- D. Diatomic gases Discuss
- 9. 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
- 10. The particle with 13 protons and 10 electrons is
Options- A. Al -atom
- B. Al3+ ion
- C. nitrogen isotope
- D. None of these Discuss
Chemistry problems
Search Results
Correct Answer: stream of electrons
Correct Answer: an element or a compound
Correct Answer: ethylene
Correct Answer: Acrylonitrile
Explanation:
The monomeric unit of orlon polymer is Acrylonitrile. Orlon is also known as Polyacrylonitrile (PAN).
Correct Answer: Both (and (B)
Correct Answer: loss of electron
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.
Correct Answer: Real gases
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.
Correct Answer: Al3+ ion
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