Chemistry Set 2 FAQs

1. Heating sugar gently in a boiling tube leaves behind:

2. Dalton published 'A New System of Chemical Philosophy' in the year:

3. With increase in hydronium ion concentration, the pH value of a solution:

4. The white precipitate formed on mixing sodium sulphate and barium chloride solutions is:

5. Spreading of the fragrance of an incense stick throughout a room shows that air particles are:

6. The most malleable metals are:

7. A chemical reaction in which a substance reacts with oxygen and produces heat and/or light is called:

8. The present system of atomic masses is based on the standard:

9. The molecular formula of cyclohexane is:

10. Suspended Particulate Matter (SPM) refers to:

11. The acid present in tamarind is:

12. The molecular formula of benzene is:

13. With an increase in temperature, the solubility of gases in liquids generally:

14. Consider the following pairs: (I) Silver – Silver sulphide coating (II) Copper – Basic copper carbonate coating (III) Copper – Silver sulphide coating Which of the pairs given above is/are correctly matched?

15. The process of forming a thick oxide layer on aluminium is called:

16. Coal is formed from the remains of:

17. The three states of matter are interconvertible by changing the conditions of:

18. Consider the following pairs: (I) Acid + Metal – Salt + Hydrogen gas (II) Metal carbonate + Acid – Salt + Oxygen + Water (III) Metal oxide + Acid – Salt + Water Which of the pairs given above is/are correctly matched?

19. The interparticle spaces in solids contain:

20. A solution of slaked lime is used for:

21. When a metal is attacked by substances around it, such as moisture and acids, the process is called:

22. Combustion of coal and petroleum produces major pollutants which are oxides of:

23. Which of the following non-metals is lustrous?

24. Cisplatin and taxol are drugs effective in the therapy of:

25. A stone is lowered into a measuring cylinder containing 40 mL of water, and the water level rises to 52 mL. The volume of the stone is:

26. Consider the following pairs: (I) Hydrogen molecule (H₂) – Single bond (II) Chlorine molecule (Cl₂) – Single bond (III) Oxygen molecule (O₂) – Single bond Which of the pairs given above is/are correctly matched?

27. Sieving is used when the components of a solid–solid mixture differ in:

28. Ethanol produced for industrial use is made unfit for drinking by adding poisonous substances like methanol and a dye that colours it:

29. In the conversion of ethanol to ethene, concentrated sulphuric acid acts as a:

30. Baked clay is called: