The polymerisation of which of the following is used in manufacturing of polythene in industry ?
1). Methane
2). Styrene
3). Acetylene
4). Ethylene
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1. The mass number of a nucleus is
2. The chemical bahaviour of an atom depends upon
3. Which one of the following is used for dating very old objects of archaeological importance?
4. Iodine value is used to estimate
5. The gas used for artificial fruit ripening of green fruit is
6. Commercially, sodium bicarbonate is known as
7. Aspirin is
8. The amount of chlorine available in water after disinfection is: called as