-->
1. Ancient chemistry was given the name ‘Alchemy’ by:
(a) Arabs (b) Greeks (c) Romans (d) Chinese
2. Molecules responsible for the smell of fruits:
(a) Alum (b) Lime (c) Ester (d) Epsom
3. Colour of Iodoform:
(a) Red (b) Blue (c) Green (d) Yellow
4. The metal that shows acidic and basic charactor:
(a) Iron (b) Aluminium (c) Gold (d) Silver
5. The most harmful metal to man:
(a) Copper (b) Silver (c) Tin (d) Lead
6. Metals ….. when they are heated:
(a) relax (b) contract (c) expand (d) deviate
7. The red colour of Mars is due to:
(a) Iodine (b) Ferric oxide (c) Potassium permanganate (d) Methyl red
8. The atomic weight of Mercury is:
(a) 256 (b) 95.95 (c) 20.183 (d) 200.61
9. Which of the following alkali metals has the highest specific heat?
(a) Potassium (b) Caesium (c) Rubidium (d) Lithium
10. Natural rubber is a polymer of:
(a) Ethylene (b) Venyl Chloride (c) Isoprene (d) Styrene
11. Which metal is used to make the covering of nuclear reactors?
(a) Lead (b) Uranium (c) Tin (d) Copper
12. Which is added to petrol to reduce knocking:
(a) Ethyl Mercapton (b) Tetra Ethyl Lead (c) Gas Oil (d) Benzene
13. The first organic compound prepared in laboratory:
(a) Ammonia (b) Urea (c) Methane (d) Benzene
14.Which is known as ‘Artificial Silk’?
(a) Dioxine (b) Nylon (c) Cellulose (d) Rayon
15. Which one of the following is an isotope of Hydrogen?
(a) Protium (b) Deuterium (c) Tritium (d) All of these
16. Number of naturally occurring elements:
(a) 90 (b) 91 (c) 92 (d) 93
17. Number of periods in the periodic table:
(a) 5 (b) 7 (c) 18 (d) 9
18. Number of groups in the periodic table:
(a) 18 (b) 19 (c) 16 (d) 15
19. Number of blocks in the periodic table:
(a) 4 (b) 5 (c) 6 (d) 7
20. Alakaline earth metals belong to ...... group.
(a) Fourth (b) Third (c) Second (d) First
Answers: 1 (a) 2(c) 3 (d) 4 (b) 5(d)6(c) 7(b) 8(d)
9(d) 10(c) 11(a) 12(b) 13(b) 14(d) 15(d) 16(c)
17(b) 18(a) 19(a) 20(d)
-->
1. Ancient chemistry was given the name ‘Alchemy’ by:
(a) Arabs (b) Greeks (c) Romans (d) Chinese
2. Molecules responsible for the smell of fruits:
(a) Alum (b) Lime (c) Ester (d) Epsom
3. Colour of Iodoform:
(a) Red (b) Blue (c) Green (d) Yellow
4. The metal that shows acidic and basic charactor:
(a) Iron (b) Aluminium (c) Gold (d) Silver
5. The most harmful metal to man:
(a) Copper (b) Silver (c) Tin (d) Lead
6. Metals ….. when they are heated:
(a) relax (b) contract (c) expand (d) deviate
7. The red colour of Mars is due to:
(a) Iodine (b) Ferric oxide (c) Potassium permanganate (d) Methyl red
8. The atomic weight of Mercury is:
(a) 256 (b) 95.95 (c) 20.183 (d) 200.61
9. Which of the following alkali metals has the highest specific heat?
(a) Potassium (b) Caesium (c) Rubidium (d) Lithium
10. Natural rubber is a polymer of:
(a) Ethylene (b) Venyl Chloride (c) Isoprene (d) Styrene
11. Which metal is used to make the covering of nuclear reactors?
(a) Lead (b) Uranium (c) Tin (d) Copper
12. Which is added to petrol to reduce knocking:
(a) Ethyl Mercapton (b) Tetra Ethyl Lead (c) Gas Oil (d) Benzene
13. The first organic compound prepared in laboratory:
(a) Ammonia (b) Urea (c) Methane (d) Benzene
14.Which is known as ‘Artificial Silk’?
(a) Dioxine (b) Nylon (c) Cellulose (d) Rayon
15. Which one of the following is an isotope of Hydrogen?
(a) Protium (b) Deuterium (c) Tritium (d) All of these
16. Number of naturally occurring elements:
(a) 90 (b) 91 (c) 92 (d) 93
17. Number of periods in the periodic table:
(a) 5 (b) 7 (c) 18 (d) 9
18. Number of groups in the periodic table:
(a) 18 (b) 19 (c) 16 (d) 15
19. Number of blocks in the periodic table:
(a) 4 (b) 5 (c) 6 (d) 7
20. Alakaline earth metals belong to ...... group.
(a) Fourth (b) Third (c) Second (d) First
Answers: 1 (a) 2(c) 3 (d) 4 (b) 5(d)6(c) 7(b) 8(d)
9(d) 10(c) 11(a) 12(b) 13(b) 14(d) 15(d) 16(c)
17(b) 18(a) 19(a) 20(d)
-->
Post A Comment:
0 comments: