Sets
Chemistry Set 13
30 questions 1. On heating, ferrous sulphate crystals decompose to give ferric oxide, sulphur dioxide and:
2. When non-metals react with metals, they form:
3. Turmeric paper cannot differentiate between:
4. Metal oxides that react with both acids and bases to produce salts and water are called:
5. Cations and anions are collectively called:
6. The first scientist to consider the idea of trends among properties of elements was:
7. Which non-metal is commonly used in water purification?
8. Consider the following statements:
(I) Brass and bronze are good conductors of electricity.
(II) Solder has a low melting point.
(III) The melting point of an alloy is less than that of pure metals.
Which of the above is/are correct?
9. Assertion (A): Oxidation and reduction always occur together in a chemical reaction.
Reason (R): The electrons lost by one species are gained by another species.
10. Consider the following about a burning candle:
(I) Melting of wax is a physical change.
(II) Evaporation of wax is a physical change.
(III) Burning of wax vapour is a chemical change.
Which of the above is/are correct?
11. The correct decreasing order of reactivity of the following metals with dilute acids is:
12. Consider the following statements:
(I) A transparent solution shows the Tyndall effect.
(II) A colloid shows the Tyndall effect.
(III) A suspension shows the Tyndall effect.
Which of the above is/are correct?
13. Consider the following pairs:
(I) Butter paper – Translucent
(II) Cardboard – Opaque
(III) Water – Opaque
Which of the pairs given above is/are correctly matched?
14. A change in which no new substance is formed is called a:
15. The acid produced by the stomach to help in digestion is:
16. The melting point of gallium, as found experimentally, is:
17. Consider the following statements:
(I) Diamond and graphite have the same chemical properties.
(II) Graphite is a very good conductor of electricity.
(III) Synthetic diamonds are easily distinguishable from natural diamonds.
Which of the above is/are correct?
18. A three-carbon chain with a triple bond is named:
19. The suffix used in naming the ketone group is:
20. The lecture series 'Chemical History of a Candle' was delivered by: