Question 221
Which of the following is manmade resource?
Question 222
Which of the following is natural resource?
Question 223
An example of fossil fuel is?
Question 224
PCRA stands for?
Question 225
The first oil well was drilled in?
Question 226
Coaltar contains about?
Question 227
Purest form of carbon is?
Question 228
Water is a ________?
Question 229
An electric lamp glows due to?
Question 230
Electroplating prevents?