Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules.
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_______ is an anaesthetic agent.
Which of the following compounds is the strongest acid?
The most abundant element in the earth's atmosphere is
In an acid base reaction which product is produced along with a salt?
Which method will be employed to test the hardness of water?
According to Dalton’s Atomic Theory, the smallest indivisible particles of matter is called ______.
Air ___________________ are the substances which contaminate the air.
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