Which has the lowest freezing point?
Helium has the lowest freezing point of all the elements. When coming to metals, mercury has the lowest freezing point of all the metals.
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?