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Asked/Added Questions From NCERT:


Question 1. Asked on :21 August 2019:08:31:38 AM

 What is crop?

-Added by Sohail siddique Science » Coal And Petroleum

Answer:

priyanshu kumar

 When we grow Fruits and vegetables in large amount of land. This is called crop.


-Answered by priyanshu kumar On 13 December 2019:08:44:25 AM


Question 2. Asked on :21 August 2019:08:24:47 AM

 explain why fossil fuel are exhaustible natural resource?

-Added by Sohail siddique Science » Coal And Petroleum

Answer:

priyanshu kumar

Fossils Fuels Require millions of years to form the dead vegetation and animals that get buried deep inside the earth.


-Answered by priyanshu kumar On 13 December 2019:08:44:32 AM


Question 3. Asked on :25 July 2019:09:09:45 PM

Write the uses of coke. 

-Added by Master Mind Science » Coal And Petroleum

Answer:

Himanshi Verma

 Coke is used as a fuel and as a reducing agent in the smelting iron ore in a blast furnace. The carbon monoxide produced by its combustion reduces iron oxide in the production of the iron product. coke is commonly used as a fuel for blacksmithing.

-Answered by Himanshi Verma On 26 July 2019:07:41:19 PM


Question 4. Asked on :25 July 2019:08:32:14 PM

Write name of three useful products of coal. 

-Added by Master Mind Science » Coal And Petroleum

Answer:

Himanshi Verma
(i) Coke (ii) Coal tar and (iii) coal  gas are three useful products of coal. 

-Answered by Himanshi Verma On 26 July 2019:07:46:28 PM


Question 5. Asked on :25 July 2019:08:20:46 PM

Why is petroleum called black gold? Explain. 

-Added by Master Mind Science » Coal And Petroleum

Answer:

Master Mind

Petroleum gives so many useful and valuable products like petrol, diesel, kerosene, paraffin and other petroleum gases. Also many products called petrochemicals are obtained from petroleum like polythene, plastics and polymers. These products are the base of many industries and have a number of commercial importance. Hence crude oil is black in colour but as valuable as gold. So people call it black gold. 

-Answered by Master Mind On 25 July 2019:08:21:43 PM


 

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