Methane contributes towards global warming so it is called a _________________ gas.
The Chemical formula of Ammonium nitrate is ___________.
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Which is the most economical method of removing solid matter from water?
Which of the following elements has the lowest melting point?
NaHCO3 is chemical formula for ___________.
A change in which no new substances are formed is called _____________.
Which of the following is the best fire-extinguisher?
Which of the following statements are CORRECT?
I. Melamine is a Thermo setting plastic.
II. It resists fire.
III It is a poor conductor of heat.
Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
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