which of these substances are elements and which are compact explain your answer ko2 NaCl a l c a c a l cl2 H2

Open in App

Solution

Dear student,
1) KO₂= It is a compound because it consists of two combined elements.
2) NaCl = It is a compound because it consists of two combined elements.
3) Cl₂= It is an element because it consists of the same type of atom.
4) H₂= It is an element because it consists of same type of atom.
Regards!

Suggest Corrections

Similar questions

Q. What products are formed during, the electrolysis of a concentrated aqueous solution of

N a C l

?
(I)

C l_{2}

(II)

N a O H

(aq)

(III)

H_{2}

(g)

Write answers the following questions.

(a) Explain the difference between acids and bases.

(b) Why does an indicator not affect common salt?

(d) Explain the difference between a base and an alkali.

The electronic configurations of three elements A, B and C are as follows:
$\begin{matrix} A & 2, 8, 1 B & 2, 8, 7 C & 2, 4 \end{matrix}$

(a) Which of these elements is a metal?
(b) which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which tow elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?

Q. Classify the following as elements and compounds: MgO, H₂, NaCl, Cl₂, N₂, Cl, Ca, H₂O

Q. Which type of lens is : (a) a converging lens, and which is (b) a diverging lens? Explain your answer with diagrams.

Join BYJU'S Learning Program