Bakelite is a copolymer of Phenol and
1). Formaldehyde
2). Acetaldehyde
3). Benzaldehyde
4). Cinnaldehyde
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1. The ratio of pure gold in 18 carat gold is
2. Which one of the following does not form oxyacid ?
4. Dry ice is
5. Milk is a colloidal system in which:
6. All isotopes of the same element have ________
7. Nitrogen forms a variety of compounds in all oxidation states ranging from
8. When there are two electrons in the same orbital they have: