TRB MODEL QUESTIONS FOR CHEMISTRY
21. |
Either chloroform and nitrous oxide are |
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- A. Analgesics
- B. Antibiotics
- C. Anaesthetics
- D. Explosives
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22. |
Calciferol is |
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- A. Vitamin A
- B. Vitamin B
- C. Vitamin C
- D. Vitamin D
|
23. |
Which of the following substances is used for preservation of food grains? |
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- A. Vinegar
- B. Sodium chloride
- C. Sodium benzoate
- D. Potassium permanganate
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24. |
Which one of the following is a mixture? |
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- A. Lime
- B. Sugar
- C. Sea water
- D. Table salt
|
25. |
Non stick kitchen wares are coated with |
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- A. Silicon
- B. PVC
- C. Graphite
- D. Teflon
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