Which of the following is the composition of glass?

For the reaction sequence given below, the correct statement$(s)$ is$(are)$
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$(A)$ Both $X$ and $Y$ are oxygen containing compounds.
$(B) \ Y$ on heating with $CHCl _3 / KOH$ forms isocyanide.
$(C) \ Z$ reacts with Hinsberg's reagent.
$(D) \ Z$ is an aromatic primary amine.

The vectors $3\,i + j - 5\,k$ and $a\,i + b\,j - 15\,k$ are collinear,if

If $A$ and $B$ are two sets,then $A \cup B = A \cap B$ if and only if

Which of the following statements is false regarding the properties of electromagnetic waves?

Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not formed in these reactions?