Boron cannot form which one of the following anions?
(1) BO2-
(2) BF63-
(3) BH4-
(4) B(OH)4-
Due to absence of low lying vacant d orbital in B, sp3d2hybridization is not possible hence BF63-will not formed.
Which of the following elements has the lowest melting point?
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The Chemical formula of Ammonium nitrate is ___________.
Which is the most economical method of removing solid matter from water?
NaHCO3 is chemical formula for ___________.
A change in which no new substances are formed is called _____________.
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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.
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