1. Water has maximum density at .... degree celcius:
(a) 0 (b) 4
(c) 25 (d) 100
2. The gas using for filling balloons:
(a) Nitrogen (b) Oxygen
(c) Helium (d) Argon
3. Beryllium aluminium silicate is known as:
(a) Alum (b) Topaz
(c) Ruby (d) Emerald
4. The isotope using for radio carbon dating:
(a) Carbon-14 (b) Cobalt-60
(c) Uranium-238 (d) None of these
5. Which is not correctly matched?
(a) Black lead-Graphite (b) Solid CO2-Dry ice
(c) Nitrous oxide- laughing gas (d) Helium-Chemical sun
6. The best non-metallic conductor of electricity:
(a) Silicon (b) Germanium
(c) Graphite (d) Boron
7. The first Trans Uranic element:
(a) Plutonium (b) Neptunium
(c) Einsteinium (d) Fermium
8. Most chemically reactive element?
(a) Hydrogen (b) Oxygen
(c) Carbon (d) Flourine
9. The colour of sodium vapour lamp:
(a) Yellow (b) Blue
(c) Violet (d) Red
10. The essential constituent of chlorophyll:
(a) Manganese (b) Sodium
(c) Potassium (d) Magnisium
11. The first to isolate aluminium from bauxite:
(a) Oesterd (b) Wohler
(c) Charles Martin Hall (d) Henry Bessemer
12. The main constituent of bone:
(a) Calcium carbonate (b) Calcium silicate
(c) Calcium phosphate (d) None of these
13. Which is used for the vulcanisation of rubber:
(a) Sulpher (b) Sodium
(c) Phospherus (d) Iron
14. The most abundant inert gas:
(a) Radon (b) Xenon
(c) Krypton (d) Argon
15. Which is known as the ‘metal of future’?
(a) Uranium (b) Platinum
(c) Tantallum (d) Titanium
16. Pyrolusite is the ore of:
(a) Magnisium (b) Iron
(c) Copper (d) Manganese
17. Second most abundant metal in the earth’s crust:
(a) Silicon (b) Iron
(c) Aluminium (d) Gold
18. The purest form of Iron:
(a) Rust (b) Pig iron
(c) Wrought iron (d) Haematite
19. Which is not a constituent of Alnico?
(a) Nickel (b) Cobalt
(c) Copper (d) Aluminium
20. Malachite is the ore of:
(a) Copper (b) Iron
(c) Manganese (d) Aluminium
21. Which is used as a catalyst in hydrogenation?
(a) Cobalt (b) Nickel
(c) Silver (d) Zinc
22. Basic copper carbonate is the chemical name of:
(a) Rust (b) Corrundum
(c) Carborandum (d) Verdigris
23. The first metal used used systematically for making tools:
(a) Iron (b) Aluminium
(c) Copper (d) Gold
24. Select the correctly matched?
1. Ferrum 2. Cuprum 3. Kalium 4. Natrium
A.Potassium B. Iron C.Copper D. Sodium
(a) 1D 2C 3A 4 B (b) 1B 2A 3C 4 D
(c) 1B 2C 3D 4 A (d) 1B 2C 3A 4 D
25. Pentlandite is the ore of:
(a) Iron (b) Cobalt
(c) Nickel (d) Copper
Answers
1 (b) 2(c) 3 (d) 4 (a)
5(d) 6(c) 7(b) 8(d)
9(a) 10(d) 11(c) 12(c)
13(a) 14(d) 15(d) 16(d)
17(b) 18(c) 19(c) 20(a)
21(b) 22(d) 23(c) 24(d)
25(c)