MEDIUM
10th CBSE
IMPORTANT
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A metal X is stored under kerosene. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water it turns red litmus blue.
Name a process by which X can be obtained from its molten chloride.

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Important Questions on Metals and Non-Metals

MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 13

Give reason for the following:

Zinc is used in the galvanization of iron and not copper.

EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 13

Give reason for the following:

Corrosion of aluminium is a blessing rather than a curse.

EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 13

Give reason for the following:

Food cans are coated with tin rather than zinc.

MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 14
Explain why calcium metal after reacting with water starts floating on its surface. Write the chemical equation for the reaction.
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 14
A metal X does not liberate hydrogen from acids, but reacts with oxygen to give a black coloured product. Identify X and the black coloured product and also write the reaction of metal X with oxygen.
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 15
Corrosion of iron is a serious problem. Every year, a large amount of money is spent to replace the rusted iron structure. But corrosion of all metals is not troublesome. Sometimes, corrosion of metals is an advantage because it prevent the metal underneath from further damage. Aluminium is highly resistant to corrosion due to the formation of a thin impervious (non-penetrable) layer of aluminium oxide (Al2O3) which does not allow moist air to come in contact with the metal and prevents the metal underneath from further damage.
Which metals do not corrode?
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 15
Corrosion of iron is a serious problem. Every year, a large amount of money is spent to replace the rusted iron structure. But corrosion of all metals is not troublesome. Sometimes, corrosion of metals is an advantage because it prevent the metal underneath from further damage. Aluminium is highly resistant to corrosion due to the formation of a thin impervious (non-penetrable) layer of aluminium oxide(Al2O3) which does not allow moist air to come in contact with the metal and prevents the metal underneath from further damage.
Suggest two methods to prevent rusting.
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 3 - Metals and Non-Metals>MOCK TEST>Q 15
Corrosion of iron is a serious problem. Every year, a large amount of money is spent to replace the rusted iron structure. But corrosion of all metals is not troublesome. Sometimes, corrosion of metals is an advantage because it prevent the metal underneath from further damage. Aluminium is highly resistant to corrosion due to the formation of a thin impervious (non-penetrable) layer of aluminium oxide(Al2O3) which does not allow moist air to come in contact with the metal and prevents the metal underneath from further damage.
“Corrosion of some metals is an advantage". Give an example in support of this statement.