Discussion
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- Question
Chlorophyll is a naturally occurring chelate compound in which central metal is
Options- A. copper
- B. magnesium
- C. iron
- D. calcium
- Correct Answer
- magnesium
- 1. Which of the following is used in pencils?
Options- A. Graphite
- B. Silicon
- C. Charcoal
- D. Phosphorous Discuss
- 2. Which of the following is not an isotope of hydrogen?
Options- A. Tritium
- B. Deuterium
- C. Protium
- D. Yttrium Discuss
- 3. Soda water contains
Options- A. carbonic acid
- B. sulphuric acid
- C. carbon dioxide
- D. nitrous acid Discuss
- 4. Which of the following was to be discovered first in the chromospheres of the sun?
Options- A. Krypton
- B. Xenon
- C. Neon
- D. Helium Discuss
- 5. Most soluble in water is
Options- A. camphor
- B. sulphur
- C. common salt
- D. sugar Discuss
- 6. Bromine is a
Options- A. black solid
- B. red liquid
- C. colourless gas
- D. highly inflammable gas Discuss
- 7. Heavy water is
Options- A. deuterium oxide
- B. PH7
- C. rain water
- D. tritium oxide Discuss
- 8. Permanent hardness of water may be removed by the addition of
Options- A. sodium carbonate
- B. alum
- C. potassium permanganate
- D. lime Discuss
- 9. Carbon, diamond and graphite are together called
Options- A. allotropes
- B. isomers
- C. isomorphs
- D. isotopes Discuss
- 10. Brass gets discoloured in air because of the presence of which of the following gases in air?
Options- A. Oxygen
- B. Hydrogen sulphide
- C. Carbon dioxide
- D. Nitrogen Discuss
General Science problems
Search Results
Correct Answer: Graphite
Correct Answer: Yttrium
Explanation:
http://en.wikipedia.org/wiki/Isotopes_of_hydrogen
Correct Answer: carbon dioxide
Correct Answer: Helium
Correct Answer: sugar
Correct Answer: red liquid
Correct Answer: deuterium oxide
Correct Answer: sodium carbonate
Correct Answer: allotropes
Correct Answer: Hydrogen sulphide
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