MCQs of General Principles and Processes of Isolation of Elements | GUJCET MCQ

General Principles and Processes of Isolation of Elements MCQs

MCQs of General Principles and Processes of Isolation of Elements

Showing 151 to 154 out of 154 Questions

151.

In the extraction of copper from sulphide ore the metal is formed by reduction of Cu₂O with

(a)	FeS
(b)	CO
(c)	Cu₂S
(d)	SO₂

152.

Carbon and CO gas are used to reduce which of the following pairs of metal oxides for extraction of metals ?

(a)	FeO, SnO
(b)	SnO, ZnO
(c)	BaO,Na₂O₂
(d)	FeO, ZnO

153.

Identify X, Y, Z in the following reaction and select the proper choice :

X \overset{∆}{\to} Y + C O_{2 (g)} Y + Z \overset{∆}{\to} Z n_{(s)} + C O_{(g)}

(a)	$X = {ZnO}_{(s),} Y = {ZnCO}_{3 (s)}, Z = C_{(s)}$
(b)	$X = {ZnCO}_{3 (s)}, Y = {ZnO}_{(s)}, Z = C_{(s)}$
(c)	$X = C_{(s)}, Y = {CO}_{2 (g)}, Z = {ZnCO}_{3 (s)}$
(d)	$X = {ZnCO}_{3 (s)}, Y = C_{(s)}, Z = {CO}_{2 (g)}$

154.

Which of the following reactions is to obtain chlorine from sea water ?

(a)	${Cl}_{2 (a q)} + 2 H_{2} O_{(l)} \to 2 {OH}^{-}_{(aq)} + H_{2 (g)} + {Cl}_{2 (g)}$
(b)	$2 {Cl}^{-}_{(a q)} + 2 H_{2} O_{(l)} \to 2 {OH}^{-}_{(aq)} + H_{2 (g)} + {Cl}_{2 (g)}$
(c)	$2 {Cl}^{-}_{(a q)} + 2 {OH}^{-}_{(aq)} \to 2 H_{2} O_{(l)} + H_{2 (g)} + {Cl}_{2 (g)}$
(d)	$2 {OH}^{-}_{(aq)} + H_{2 (g)} + {Cl}_{2 (g)} + \to 2 {Cl}^{-}_{(aq)} + 2 H_{2} O_{(l)}$

Showing 151 to 154 out of 154 Questions