Sets
Chemistry Set 14
30 questions 1. Changes in which one or more new substances are formed are called:
2. The amount of solute present in a fixed quantity of solution is termed its:
3. The only metal that is liquid at room temperature is:
4. To extinguish a fire on a person's clothes, which of the following should never be used to wrap the person?
5. When magnesium burns in air, the white powder formed is:
6. Carbon, in all its allotropic forms, burns in oxygen to give:
7. 12 g of sugar is dissolved in 88 g of water. The mass by mass percentage of the solution is:
8. The clusters formed by soap molecules in water, with hydrophobic tails in the interior, are called:
9. Millilitre is correctly abbreviated as:
10. In diamond, each carbon atom is bonded to ______ other carbon atoms.
11. The SI unit of volume is:
12. Talcum powder is made from the mineral:
13. Oil and gas are the remains of millions of tiny plants and animals that lived in the:
14. The height of the Iron Pillar near the Qutub Minar is about:
15. Covalent compounds generally have low melting and boiling points because their intermolecular forces are:
16. On heating, the blue crystals of hydrated copper sulphate turn:
17. Consider the following pairs:
(I) Alcohol – Suffix -ol
(II) Aldehyde – Suffix -al
(III) Halo alkane – Suffix -chloro
Which of the pairs given above is/are correctly matched?
18. A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. Its molar mass is 60 g mol⁻¹. Its molecular formula is (C = 12.0, H = 1.0, O = 16.0):
19. An aqueous solution of which of the following does not conduct electricity?
20. Tooth decay starts when the pH of the mouth falls below: