Q.1

Which of the following is an element?

  • Ruby
  • Sapphire
  • Emerald
  • Diamond
Q.2

Which of the following are the ingredients of gun metal?

  • Iron, Zinc, Titanium
  • Iron, tin
  • Iron, Brass, Tin
  • Copper, Tin
Q.3

The group of metals Fe, Co, Ni may best called as

  • transition metals
  • main group metals
  • alkali metals
  • rare metals
Q.4

Marsh gas is

  • nitrogen
  • ethane
  • methane
  • hydrogen
Q.5

Washing soda is the common name for

  • Sodium carbonate
  • Calcium bicarbonate
  • Sodium bicarbonate
  • Calcium carbonate
Q.6

Which of the following is the lightest metal?

  • Mercury
  • Lithium
  • Lead
  • Silver
Q.7

The average salinity of sea water is

  • 3%
  • 3.5%
  • 2.5%
  • 2%
Q.8

Which metal pollute the air of a big city?

  • Copper
  • Chromium
  • Lead
  • Cadmium
Q.9

Non stick cooking utensils are coated with

  • Teflon
  • PVC
  • black paint
  • polystyrene
Q.10

Which of the following is used as a lubricant?

  • Graphite
  • Silica
  • Iron Oxide
  • Diamond
Q.11

Most soluble in water is

  • camphor
  • sulphur
  • common salt
  • sugar
Q.12

Diamond is an allotropic form of

  • germanium
  • carbon
  • silicon
  • sulphur
Q.13

From which mineral is radium obtained?

  • Rutile
  • Haematite
  • Limestone
  • Pitchblende
Q.14

Heavy water is

  • deuterium oxide
  • PH7
  • rain water
  • tritium oxide
Q.15

LPG consists of mainly

  • methane, ethane and hexane
  • ethane, hexane and nonane
  • methane, hexane and nonane
  • methane, butane and propane
Q.16

Quartz crystals normally used in quartz clocks etc. is chemically

  • silicon dioxide
  • germanium oxide
  • a mixture of germanium oxide and silicon dioxide
  • sodium silicate
Q.17

Bell metal is an alloy of

  • nickel and copper
  • zinc and copper
  • brass and nickel
  • tin and copper
Q.18

Monazite is an ore of

  • titanium
  • zirconium
  • iron
  • thorium
Q.19

Air is a/an

  • compound
  • element
  • electrolyte
  • mixture
Q.20

Which of the gas is not known as green house gas?

  • Methane
  • Nitrous oxide
  • Carbon dioxide
  • Hydrogen
Q.21

Carbon, diamond and graphite are together called

  • allotropes
  • isomers
  • isomorphs
  • isotopes
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