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NCERT Based Natural Science - Chemistry Questions For Competitive Exams
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NCERT Based Natural Science - Chemistry Questions For Competitive Exams
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25 Questions

1. Vinegar is acidic in nature due to the presence of
2. Denaturation of a protein is caused by
3. The greatest number of compounds are formed by the element
4. Pick the wrong statement: hydrogen bonding results in
5. The process of changing of one element into another is called
6. Information about the order of reaction is obtained from its
7. The most malleable metal is
8. The pH value of 12 may be of an aqueous solution of
1. Sodium hydroxide
2. Lithium hydroxide
3. Sodium chloride
4. Hydrogen chloride
The correct statements are:
9. The substance that DOES NOT contain silver is
10. The chemical name of vitamin C is
11. Consider the following processes:
1. Evaporation
2. Fractional distillation
3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are:
12. The active substance present in 'dettol’ is
13. The catalytic power of enzymes is due to
14. The increasing amount of CO2 in the atmosphere is slowly raising its temperature because it absorbs
15. The drug, reserprine is used to
16. The acid present in lemons and oranges is
17. The shape of a carbon molecule is
18. Which of the following is a chemical change?
19. When a salt dissolves in water
20. The chemical name of table salt is
21. The hardest form of carbon is
22. The boiling point of water, on the Kelvin scale of temperature is-K
23. During electrolysis, the cations and anions of the electrolyte are
1. Discharged
2. Hydrolysed
3. In motion
4. Hydrated
The correct answers are:
24. Which of the following statements about the physical properties of metal is not correct?
25. Denatured alcohol
1. Is an impure form of ethanol
2. Is unfit for drinking as it contains poisonous substances
3. Contains impurities
4. Is very unsafe to consume
The correct answers are:

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