Discussion
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- Question
When iron rusts, its weight .....
Options- A. decreases
- B. increases
- C. remains the same
- D. first increases and then decreases
- Correct Answer
- increases
- 1. Iron and manganese present as pollutants in water cannot be removed by_____
Options- A. oxidation followed by settling and filtration
- B. chlorination
- C. ion exchange process
- D. lime soda process or manganese zeolite process Discuss
- 2. Which of the following green house gases has the greatest heat-trapping ability?
Options- A. Chlorofluoro carbon
- B. Methane
- C. Carbon dioxide
- D. Nitrous oxide Discuss
- 3. Glycol is used to manufacture which of the following ?
Options- A. Nylon
- B. Artificial silk
- C. Terylene
- D. Rubber Discuss
- 4. Sour taste of lemon is due to the presence of which of the following ?
Options- A. Citric acid
- B. Acetic acid
- C. Oxalic acid
- D. Formic acid Discuss
- 5. Chemical properties of isotopes .............
Options- A. must be same
- B. must be different
- C. need not be same
- D. need not be different Discuss
- 6. Metals react with sodium hydroxide to produce ___________.
Options- A. oxygen gas
- B. sodium
- C. water
- D. hydrogen gas Discuss
- 7. Magnesium (Mg) + Oxygen (O2) = ?
Options- A. Mg2O
- B. MgO4
- C. O2Mg
- D. MgO Discuss
- 8. What is the reaction between an acid and a base called?
Options- A. Desalination
- B. Crystallisation
- C. Neutralisation
- D. Sublimation Discuss
- 9. Which of the following is one of the commercial products obtained from Gelidium and Gracilaria and are used to grow microbes and in preparations of ice- creams and jellies?
Options- A. Agar
- B. Chlorella
- C. Spirullina
- D. Gymnosperms Discuss
- 10. Which of the following is an example of thermosetting plastic?
Options- A. Bakelite
- B. PVC
- C. Polyethylene
- D. No option is correct. Discuss
Chemistry problems
Search Results
Correct Answer: chlorination
Correct Answer: Chlorofluoro carbon
Correct Answer: Terylene
Correct Answer: Citric acid
Correct Answer: must be same
Correct Answer: hydrogen gas
Correct Answer: MgO
Correct Answer: Neutralisation
Correct Answer: Agar
Correct Answer: Bakelite
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