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 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. Which of the following gives the numerical expression for the statement, '4/5 the sum (1 + 2/3) added to twice the difference between 3 and 1/2'?

Q. Given table gives an account of differences between PCR and gene cloning. Which of the, following points shows the incorrect difference?

	Parameter	PCR	Gene cloning
1	Efficient	More	Less
2	Apparatus Requirement	DNA	Restriction enzyme, ligase, vector, bacterial cell
3	Manipulation	In vitro	In vitro and in vivo
4	Cost	More	Less
5	Automation	Yes	No
6	Error probability	Less	More
7	Time for a typical experiment	2-4 days	4 hours
8	Application	More	Less

Q.

What is the Difference between elements and compounds ?