Question

Match the following:

$$\begin{array}{cccc}1& Molecularformulaofwater& A& 18amu\\ 2& Chemicalnameofwater& B& Oceans\\ 3& Molecularmassofwater& C& H_{2}O\\ 4& Largewaterbodies& D& Dihydrogenmonoxide\end{array}$$

• A. 1-C, 2-D, 3-A, 4-B
• B. 1-C, 2-B, 3-A, 4-D
• C. 1-D, 2-B, 3-A, 4-C
• D. 1-D, 2-A, 3-B, 4-C

Answer 1

The correct option is A

1-C, 2-D, 3-A, 4-B

Next to air, water is an essential substance for survival, and indeed for life on earth. It makes up seven-tenth of our body. One molecule of water contains two atoms of hydrogen and one atom of oxygen. The molecular formula of water is $H_{2}O$. The chemical name of water is dihydrogen monoxide. The molecular mass of water is 18 amu [(2 $\times$1)+16 = 18]. Water bodies like rivers, lakes, oceans and the polar ice caps constitute large reservoirs of water, the oceans being the largest. In fact, water covers three-fourths of the earth's surface.

$$\begin{array}{cccc}1& Molecularformulaofwater& C& H_{2}O\\ 2& Chemicalnameofwater& D& Dihydrogenmonoxide\\ 3& Molecularmassofwater& A& 18amu\\ 4& Largewaterbodies& B& Oceans\end{array}$$