[PPSC Agriculture Development Officer, 2020]
46. Marsh gas, formed from decaying organic matter and also found in coal mines, is
Carbon dioxide
Methane
Ethane
Carbon monoxide
47. The substance made from only carbon is
Sugar
Acetic acid
Graphite
[PPSC Deputy Director, 2020]
48. Which of the following can be used as coolant in nuclear power reactors? 1. Light water
2. Heavy water 3. Carbon dioxide
4. Helium
Select the correct answer using the codes given below:
1 and 2
1 and 3
3 and 4
All of these
49. Where is the Headquarter of WIPO (World Intellectual Property Organisation) located?
Oslo
Washington
Geneva
Stockholm
50. Man and Biosphere Programme is affiliated with
UNESCO
UNFCCC
IUCN
WWF