Q. Which of the following properties is different for neutral atoms of two isotopes of the same element?
1) Atomic number
2) Mass
3) Number of electrons
4) General chemical reaction
Q. Which of the following would be expected to form ionic solutions in water?
1) CO2
2) CCl4
3) O2
4) NaI
Q. Gypsum is used in the case of the soils which are -
1) Soline
2) Alkaline
3) Waterlogged
4) Glavey
Q. As the temperature of water falls from 8°C to 1°C, water will -
1) First contract and then expand
2) First expand and then contract
3) Freeze
4) Gradually becomes denser
Q. Nitrogen in the air -
1) Is essential for the body
2) Dilutes oxygen which is very active in pure form
3) Makes oxygen soluble in the blood
4) Decreases the density of air
Q. Iron is protected from rusting by coating with zinc. This process is called -
1) Galvanization
2) Condensation
3) Evaporation
4) None of the above
Q. Which of the following is not a fossil fuel?
1) Natural gas
2) Petroleum
3) Coal
4) Wood
Q. Which allotrope of carbon is in the form of a rigid three dimensional structure?
1) Graphite
2) Fullerene
3) Diamond
4) Lampblack
Q. Which one of the following is not used as cryoprotectant?
1) Sucrose
2) DMSO
3) Glycerol
4) Sodium hypochloride
Q. Which of the following is NOT a greenhouse gas?
1) Nitrous oxide
2) Water vapour
3) Surface level ozone
4) Helium
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