Which one of the following liquids is very good conductor of heat?
A. Mercury
B. Water
C. Ether
D. Benzene
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Which of the following metal is the heaviest?
A. Iron
B. Silver
C. Nickel
D. Osmium
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Choose the different one from the following.
A. aluminium
B. iron
C. copper
D. brass
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When silver chloride is kept in sunlight, So it becomes brown due to which formation?
A. Silver ion
B. Silver oxide
C. Silver metal
D. Silver oxalate
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If 1 kg The alloy contains 32% copper, 70% zinc and the remaining nickel, then what will be the amount of copper in the alloy?
A. 280 grams
B. 400 grams
C. 240 grams
D. 320 grams
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. . . . . . . . is an important metal required to make amalgam.
A. aluminium
B. mercury
C. iron
D. tungsten
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Zinc Sulfate heptahydrate (ZnSO4 .7H2 O) is commonly known as:
A. White vitriol
B. Gypsum
C. Epsom salt
D. Blue vitriol
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White ash is produced by burning magnesium ribbon, which mixes in water to make . . . . . . . .
A. Magnesium halides
B. Magnesium oxide
C. Magnesium hydroxide
D. Magnesium sulphate
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Which one of the following is the chemical formula of Washing Soda?
A. NaHCO3
B. N a 2 C O 3 ⋅ 10 H 2 O
C. N a 2 C O 3 ⋅ 5 H 2 O
D. NaOH
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Consider the following statements.
1. Mercury is found in liquid state at room temperature.
2. The property of metals by which they can beaten into thin sheets is called malleability.
3. The property of metals by which it can be drawn into wires is called ductility.
Which of the statements given above are correct?
A. 1 and 2
B. 1 and 3
C. and 3
D. 1, 2 and 3
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The metal reacts with steam of to form oxides is . . . . . . . .
A. Potassium
B. Sodium
C. Calcium
D. Iron
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The chemical name of limestone is
A. Calcium Carbonate
B. Magnesium Chloride
C. Sodium Chloride
D. Sodium Sulphate
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Aluminium metal is only extracted by the following:
A. Reduction
B. Oxidation
C. Neutralization
D. Electrolysis
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Mercury is basically used in thermometer devices because its especiality is
A. High density
B. High liquidity
C. High circulation power
D. High specific heat
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Tin layer is applied to food utensils, not zinc.
A. Zinc is costlier than tin
B. The boiling point of zinc is more than tin
C. Zinc is more reactive than tin
D. Zinc is less reactive than tin
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Which of the following gases is released when hydrochloric acid is mixed with sodiumbicarbonate?
A. Carbon monoxide
B. Carbon dioxide
C. Oxygen
D. Chlorine
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Which one of the following is the hardest metal?
A. Gold
B. Iron
C. Platinum
D. Tungsten
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Name the metal that can be easily cut with a knife:
A. sodium
B. copper
C. gold
D. aluminium
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Which of the following metals is required to be kept in oil?
A. Gold
B. Potassium
C. Iron
D. Silver
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Which are the materials generally employed as solder in soldering operation in electronics?
A. Iron and tin
B. Lead and tin
C. Aluminium and lead
D. Aluminium and iron
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