Question

16. Assertion: 03 is a powerful oxidizing agent in comparison to O2.

Reason: O3 is diamagnetic but Oz is paramagnetic.


17. Assertion: Zn2 and Cuare colourless.

Reason: Both Zn2 and Cu' contain partially filled 3d subshell.

18. Assertion: 3° Haloalkanes undergo nucleophilic substitution via SN mechanism.

Reason : 3° carbonium ion is stabilized by inductive effect and hyperconjugation.

19. Assertion: In a crystal with Schottky defect number of cations and anions are not same.

Reason : Equal number of cation and anion vacancies are present.

20. Assertion: Sea water looks blue.

Reason : Colloidal impurities present in sea water scatter light. ​

Answer 1

Answer:

Cuprous ion is colourless whereas cupric ion is blue in the aqueous solution.

Reason : Cuprous ion has unpaired electrons while cupric ion does not.