Discussion
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- Question
Which of the following is an example of thermosetting plastic?
Options- A. Bakelite
- B. PVC
- C. Polyethylene
- D. No option is correct.
- Correct Answer
- Bakelite
- 1. 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
- 2. What is the reaction between an acid and a base called?
Options- A. Desalination
- B. Crystallisation
- C. Neutralisation
- D. Sublimation Discuss
- 3. Magnesium (Mg) + Oxygen (O2) = ?
Options- A. Mg2O
- B. MgO4
- C. O2Mg
- D. MgO Discuss
- 4. Metals react with sodium hydroxide to produce ___________.
Options- A. oxygen gas
- B. sodium
- C. water
- D. hydrogen gas Discuss
- 5. When iron rusts, its weight .....
Options- A. decreases
- B. increases
- C. remains the same
- D. first increases and then decreases Discuss
- 6. Removal of carbon particles from air involves the principle of
Options- A. Precipitation
- B. Filteration
- C. Electrophoresis
- D. Sedimentation Discuss
- 7. Which of the following acts as best adsorbent?
Options- A. Charcoal
- B. Activated Charcoal
- C. Activated Coconut Charcoal
- D. Carbon black Discuss
- 8. The maximum fixation of solar energy is done by
Options- A. Bacteria
- B. Protozoa
- C. Fungi
- D. Green plants Discuss
- 9. Which one of the following is commonly used for pulp bleaching in the paper industry?
Options- A. Mild sulphuric acid
- B. Glucose isomerase
- C. peroxide
- D. Iodine and water Discuss
- 10. In water treatment plant, use of chloramines ensures __________
Options- A. taste and odour control
- B. weed control in reservoirs
- C. disinfection
- D. removal of permanent hardness Discuss
Chemistry problems
Search Results
Correct Answer: Agar
Correct Answer: Neutralisation
Correct Answer: MgO
Correct Answer: hydrogen gas
Correct Answer: increases
Correct Answer: Electrophoresis
Correct Answer: Activated Coconut Charcoal
Correct Answer: Green plants
Correct Answer: peroxide
Correct Answer: disinfection
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