Which of the following gases makes bread or cake rise making them soft and spongy?
The percentage of nitrogen in the air is about
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Methane contributes towards global warming so it is called a _________________ gas.
Which of the following is a metal?
Which of the following group is NOT Dobereiner Triads?
Safety matches contain
Air ___________________ are the substances which contaminate the air.
By using which foam the Researchers from Indian Institute of Technology – Bombay have made a low cost piezo resistive vibration sensor?
Which of the following is NOT a compound?
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