What is used to prevent freezing of fuel in space carfts?
1). Benzene
2). Glycol
3). Acetylene
4). Ester
1. _____ are a group of chemicals that influence cell division and shoot formation.
2. Which of the following pollutants is main product of automobile exhaust ?
3. Which of the following green house gases has the greatest heat-trapping ability?
4. Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
5. Carbon dioxide is produced by all of the following except
6. The element with highest first ionisation energy is