In which of the following substances all carbon atoms are quaternary in nature ?
1). Graphite
2). Diamond
3). Teflon
4). Napthalene
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1. The ratio of pure gold in 18 carat gold is
2. Question 16.12:Name a substance which can be used as an antiseptic as well as disinfectant.
3. The major component in the LPG is
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6. Which component referred to as 'Milk sugar'?
7. The liquid waste from kitchens and baths, of residences is known as :
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10. Brass is made of