Discussion
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- Question
Metals react with sodium hydroxide to produce ___________.
Options- A. oxygen gas
- B. sodium
- C. water
- D. hydrogen gas
- Correct Answer
- hydrogen gas
- 1. When iron rusts, its weight .....
Options- A. decreases
- B. increases
- C. remains the same
- D. first increases and then decreases Discuss
- 2. 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
- 3. 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
- 4. Glycol is used to manufacture which of the following ?
Options- A. Nylon
- B. Artificial silk
- C. Terylene
- D. Rubber Discuss
- 5. 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
- 6. Magnesium (Mg) + Oxygen (O2) = ?
Options- A. Mg2O
- B. MgO4
- C. O2Mg
- D. MgO Discuss
- 7. What is the reaction between an acid and a base called?
Options- A. Desalination
- B. Crystallisation
- C. Neutralisation
- D. Sublimation Discuss
- 8. 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
- 9. Which of the following is an example of thermosetting plastic?
Options- A. Bakelite
- B. PVC
- C. Polyethylene
- D. No option is correct. Discuss
- 10. Removal of carbon particles from air involves the principle of
Options- A. Precipitation
- B. Filteration
- C. Electrophoresis
- D. Sedimentation Discuss
Chemistry problems
Search Results
Correct Answer: increases
Correct Answer: chlorination
Correct Answer: Chlorofluoro carbon
Correct Answer: Terylene
Correct Answer: Citric acid
Correct Answer: MgO
Correct Answer: Neutralisation
Correct Answer: Agar
Correct Answer: Bakelite
Correct Answer: Electrophoresis
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