The following table shows the difference between elements and compounds. Which of the given difference(s) is/are correct? $\begin{array}{cc}\text{Elements}& \text{Compounds}\\ \text{(1) Pure substances}& \text{(1) Impure substances}\\ \text{(2) Formed of only one kind of atoms}& \text{(2) Formed of two or more kinds of atoms}\\ \text{(3) Can be broken down into elements}& \text{(3) Cannot be further broken down}\\ \text{(4) Represented by a symbol}& \text{(4) Represented by a chemical formula}\end{array}$

Q.

The following table gives the difference between elements and compounds. Which of the given difference is incorrect?

Q.

The following table gives the difference between elements and compounds. Which of the given difference is incorrect?

$\begin{array}{cc}\text{Elements}& \text{Compounds}\\ \text{(1) Pure substance}& \text{(1) Impure substance}\\ \text{(2) Has only one kind of atoms}& \text{(2) Has two or more kinds of}\\ & \text{atoms}\\ \text{(3) Represented by symbol}& \text{(3) Represented by chemical}\\ & \text{formula}\\ \text{(4) Smallest particle is atom}& \text{(4) Smallest particle is molecule}\end{array}$

Q. The given table represents the proportional relationship between the two quantities $x$ and $y.$ Which of the following shows the correct values of $a$ and $b?$

$\begin{array}{cccccc}\text{Input}\left(x\right)& 2& 3& 5& 8& 11\\ \text{Output}\left(y\right)& 5& 7.5& 12.5& a& b\end{array}$

Q. X and Y are two compounds of elements $A$ and $Cl$. The molar mass and the mass % of $Cl$ are given in the table below.

$\begin{array}{ccc}\text{Compound}& \text{Molar mass}& \%\text{of Cl}\\ X& 200& 71\\ Y& 213& 50\end{array}$

X and Y are:

Q. X and Y are two compounds of elements A and Cl. Molar mass and mass % of Cl are given in the table below.
$\begin{array}{ccc}\text{Compound}& \text{Molar mass}& \%\text{of Cl}\\ X& 137& 77.5\\ Y& 208& 85.1\end{array}$

Thus, X and Y are: