Question

Match column A to column B:
$\begin{array}{cc}ColumnA& ColumnB\\ a.Noblegas& \left(i\right)Carbon,hydrogen,oxygen\\ b.Graphite& \left(ii\right)Argon\\ c.Calcium& \left(iii\right)Lubricants\\ d.Glucose& \left(iv\right)Monoatomic\end{array}$

• A. a-(i),b-(ii),c-(iii),d-(iv)
• B. a-(ii),b-(iii),c-(iv),d-(i)
• C. a-(iii),b-(i),c-(ii),d-(iv)
• D. a-(ii), b-(iii),c-(iv),d-(i)

Answer 1

The correct option is D a-(ii), b-(iii),c-(iv),d-(i)

Argon is a noble gas which does not react chemically with other elements. They are found in the air only in traces. Graphite is the allotropic form of carbon which is used to make the lead of pencils, paper black and also to make lubricants. Calcium is a monoatomic molecule. (Monoatomic- A molecule is monoatomic when it contains one atom). Glucose is a compound, which contains the elements - carbon, hydrogen, oxygen. Compounds are pure substance formed by the chemical combination of two or more elements in a definite proportion by mass. So the correct option is d. a-(ii), b-(iii),c-(iv),d-(i).