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An acid which is used as a preservative for pickles is

A. hydrochloric acid

B. citric acid

C. tartaric acid

D. acetic acid

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  1. Which of the following carbon compounds is used as a fire extinguisher?
  2. Which of the following is not a characteristic of potable water?
  3. Beri-beri is caused by deficiency of Vitamin
  4. In the making of jewels, gold is usually mixed with
  5. The compound of iron used in the manufacture of blue-black ink is
  6. Soda-water contains
  7. The sugar which is used in silvering mirrors is
  8. Vulcanisation was discovered by
  9. Water has an unusually high bolling point because
  10. The presence of dust particles in air serves
  11. The gas used in balloons in the place of hydrogen is
  12. Brass contains
  13. Iodine in alcohol is known as
  14. Which among the following is a metalloid?
  15. Which or the following gases is soluble in water and Is collected by the downward displacement or air?
  16. PAS is a drug used In the treatment of
  17. A metal which occurs 'free' in nature is
  18. The non-metal which is electropositive is
  19. An example of thermo setting plastics is
  20. A metal which is extracted by thermal reduction is
  21. The form of carbon used in decolourising sugar solution is
  22. Which or the following electrolysis?
  23. Which of the following elements is not required for the healthy growth of plants?
  24. The compound which is both an antiseptic and a disinfectant is
  25. Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because…
  26. The process of heating steel to bright red heat and cooling suddenly by plunging it into water is known…
  27. The flux added in the blast furnace is
  28. A non-metal which is a good conductor of electricity is
  29. Reduction involves
  30. Clark's method for removal of temporary hardness in water uses