|
Questions |
Answers |
| 1 |
What is the fundamental element of all organic compounds? |
Carbon |
| 2 |
In all bio-compounds the most necessary fundamental element is – |
Carbon |
| 3 |
Which sets of elements was primarily responsible for the origin of life on the Earth? |
Carbon, Hydrogen, Nitrogen |
| 4 |
A hydrocarbon in which two carbon atoms are joined by a double bond is called an – |
Alkene |
| 5 |
Which gases is used in cigarette lighters? |
Butane |
| 6 |
Which gases had caused the Bhopal Gas Tragedy? |
Methyl isocyanate |
| 7 |
When did the Bhopal Gas tragedy happen? |
2-3 Dec. 1984 |
| 8 |
From the decomposition of which of the following printing ink is formed – |
Methane |
| 9 |
Which chemicals helps in fruit ripening? |
Ethephon |
| 10 |
Calcium carbide is used for artificial ripening of green fruits because it produces – |
Acetylene |
| 11 |
Which gas mixtures is used in welding gas? |
Oxygen and Acetylene |
| 12 |
Numbers of sigma and pi bonds in benzene are – |
12, 3 |
