`SF_6` is known but `SH_6` is not known because :
(A) Fluorine is the strongest oxidizing agent
(B) Hydrogen is a weak oxidizing agent
(C) Both (A) and (B)
(D) Sulphur has smaller size

Non-metals generally act as oxidizing agents reducing agents Both (A) & (B) None of these

Which of the following is the strongest oxidising agent? (A) O_(2)^(+) (B) O_(2) (c) O_(2)^(-) (D) O_(2)^(2-)

Which of the following is the strongest oxidising agent? (A) O_(2)^(+) (B) O_(2) (c) O_(2)^(-) (D) O_(2)^(2-)

(a) Account for the following observations : (i) SF_(1) is easily hydrolysed whereas SF_(6) is not easily hydrolysed. (ii) Chlorine water is a powerful bleaching agent. (iii) Bi (V) is a stronger oxidising agent than Sb(V) (b) What happens when : (i) White phosphorus is heated with concentrated NaOH solution in an inert atmosphere of CO_(2). (ii) XeF_(6) undergoes partial hydrolysis. (Give the chemical equations involved).

Potassium dichromate is used (A) In leather industry (B) As an oxidant for preparation of many azo compounds (C) Both (1) and (2) (D) As reducing agent

Describe anomalous behaviour of fluorine with the other elements of group 17 with reference to : (a) Hydrogen bonding (b) Oxidation state (c) Polyhalide ions.

Explain the following : (a) An acidified K_2 Cr_2 O_7 paper turns green when exposed to SO_2 . (b) H_2 S acts only as reducing agent while SO_2 can act both as a reducing agent and an oxidising agent. (c) SO_2 acts as a bleaching agent. (d) Sugar turns black on addition of conc. H_2 SO_4 . (e) Ozone destroys mercury meniscus. (f) SF_6 is known, but SH_6 is not known.