Question

2 Which of the following acids is a strong electrolyte? a) H2SO4 Ob) HCI OC) HE d) HCIO4 Oe) H2CO3 Of) HBr O g) more than one correct response O h) no correct response 6 What is the conjugate base of HSO4 ? • a) H2SO4 b) SO42- OC) H3504 d) H2SO4 e) no correct response 3 Which of the statements below is true for the following reaction? 3H2S + 2 HNO3 --->3 S + 2 NO + 4H20 a) oxygen is reduced b) hydrogen is reduced c) sulfur is oxidized d) hydrogen is oxidized e) no correct response PIC.COLLAGE

Answer 1

5.

strong electrolytes are

H₂SO₄ HCl, HClO₄ , HBr.

correct option is g).

6.

conjugate base is formed by loss of H⁺ from a species.

HSO₄^- - H ⁺$\to$ SO₄^2- (conjugate base).

correct option is b)

7.

In oxidation there is loss of electrons.

S^-2 - 2e $\to$ S.

There no change in oxidation state of hydrogen and oxygen.

hence, correct option is c) sulfur is oxidised.