Question

36) Which pair represents two forms of an element in the same phase at STP but with different structures and different properties? A) I2(s) and I2(g) B) O2(g) and O3(g) C) H2(g) and Hg(g) D) H2(s) and H2O()

Answer 1

The correct answer is O2(g) and O3(g). This element shows isotopy

Answer 2

Answer:

The correct answer is option B.

Explanation:

Oxygen element exists in two forms:

1) Oxygen gas : $O_2$

In this two oxygen atoms are bonded to each other with the help of double bond.

2) Ozone = $O_3$

In ozone molecule, two oxygen are linked with double bond and the third oxygen atom is linked to one of the oxygen atom by accepting its lone pair of electrons. Due to this double bond resonates between the ozone molecule by which partial double bond character establishes between oxygen-oxygen bond.