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Q 1.
Name the metal oxides that dissolve in water to form alkalis?
Ans.
Sodium and Potassium oxides.
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Q 2.
Who is the least reactive metal?
Ans.
Gold.
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Q 3.
Which metal do not react with water?
Ans.
1.Gold and silver
2.Lead and copper. |
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Q 4.
Name the metal that is liquid in room temperature?
Ans.
Mercury.
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Q 5.
Name the non- metal that is liquid in room temperature?
Ans.
Bromine.
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Q 6.
Full form of PVC?
Ans.
Polyvinyl chloride.
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Q 7.
Name the metal that are best conductor of electricity?
Ans.
Silver.
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Q 8.
Name the metal that are best conductors of heat?
Ans.
Copper and silver.
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Q 9.
Which non-metal have the allotropes called Diamond and graphite?
Ans.
Carbon.
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Q 10.
Which non-metal can exist in different forms and each forms called an allotrope?
Ans.
Carbon.
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Q 11.
What is metallic luster?
Ans.
Metals in their pure state have a shining surface is called metallic luster.
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Q 12.
Why food cans are coated with tin and not with zinc?
Ans.
Because zinc is more reactive than tin.
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Q 13.
Name the ore of mercury?
Ans.
Cinnabar.
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Q 14.
Method to prevent rusting of iron?
Ans.
1.Greasing
2.Chrome plating 3.Painting or oiling. |
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Q 15.
Hydrogen gas is not evolved when a metal (expect manganese and magnesium) reacts with?
Ans.
Nitric acid.
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Q 16.
Which gas is produced when metals react with dilute acids, along with metal salts?
Ans.
Hydrogen.
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Q 17.
Which gas is produced when metal react with water?
Ans.
Hydrogen.
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Q 18.
Name the metals that do not react with oxygen even at a high temperature?
Ans.
Gold and silver.
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Q 19.
What length of wire can be drawn from 1 gm of gold?
Ans.
2 km.
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Q 20.
Name the metal used in thermometer?
Ans.
Mercury.
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