Asked/Added Questions From NCERT:

Question 1. Asked on :06 September 2019:07:55:02 PM

What is anodising?

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

priyanshu kumar
Anodising is a process of forming a thick layer of aluminium. Aluminium develops a thin oxide layer when exposed to air.

-Answered by priyanshu kumar On 12 October 2019:04:26:00 PM

Question 2. Asked on :02 September 2019:07:55:37 PM

What is called triple covalent bond?

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

priyanshu kumar
The nitrogen atoms share three pairs of electrons among themselves, the bond between them is called a triple covalent bond or just a triple bond.

-Answered by priyanshu kumar On 10 October 2019:11:27:08 AM

Question 3. Asked on :02 September 2019:05:40:41 PM

Why food cans are coated with tin and not zinc?

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

priyanshu kumar
Food cans are coated with tin and not zinc because zinc is more reactive than tin it reacts with food and the food taste is bad.

-Answered by priyanshu kumar On 20 October 2019:09:50:14 AM

Question 4. Asked on :02 September 2019:05:09:29 PM

Name the metal which is used for galvanising iron.

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

priyanshu kumar
Zinc is the metal which is used for galvanising iron.

-Answered by priyanshu kumar On 20 October 2019:09:52:18 AM

Question 5. Asked on :02 September 2019:05:08:49 PM

What is meant by galvanisation ? Why is it done?

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

priyanshu kumar
Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting. The most common method is hot dip galvanizing, in which steel sections are submerged in a bath of molten zinc.

-Answered by priyanshu kumar On 13 October 2019:10:38:37 AM

Question 6. Asked on :02 September 2019:05:01:27 PM

Write the properties of an alloy?

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

Akki chauhan

1. Alloys are stronger then the metals from which they are made.

2. Alloys are harder than the constituent metals.

3. Alloys are more resistant to corrosion.

4. Alloys have lower melting points than the consistuent metals.

5. Alloys have lower electrical conductivity than pure metals.

-Answered by Akki chauhan On 02 September 2019:08:58:01 PM

Question 7. Asked on :29 August 2019:06:25:23 PM

Name a carbon containing molecule which has two double bonds.

-Added by Himanshi Verma Science » Metals And Nonmetal

Answer:

Nishant Verma
The carbon containing molecule in which two double bonds are present is carbon dioxide. Its bond structure is O=C=O.

-Answered by Nishant Verma On 30 August 2019:03:00:31 PM

Question 8. Asked on :25 August 2019:09:38:38 AM

What is alloy?

-Added by Akki chauhan Science » Metals And Nonmetal

Answer:

Shivang Gupta
An alloy is a homogenous mixture two metal or one metal and one non metal.

-Answered by Shivang Gupta On 25 August 2019:02:43:58 PM

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