Question

Complete the following reactions:
(i) $SiO_2 + 2NaOH \rightarrow X + H_{2}O$
(ii) $SiO_{2 }+ 4HF \rightarrow Y + 2H_{2}O$
(iii) $Si + 2CH_{3}Cl \xrightarrow[570\,K]{Cu \text{powder}}Z$

	X	Y	Z
(a)	$Na_{2}SiO_{3}$	$SiF_4$	$(CH_{3})_{2}SiCl_{2}$
(b)	$H_{2}SiO_{3}$	$SiF_2$	$CH_{3}SiCl_{3}$
(c)	$Na_{2}SiO_{3}$	$H_{2}SiO_{3}$	$(CH)_{3})_{3}SiCl$
(d)	$Na_{2}SiO_{3}$	$H_{2}SiF_{4}$	$(CH)_{3})_{2}SiCl_{2}$

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (A)

$SiO _2+2 NaOH \rightarrow \underset{(X)}{Na _2 SiO _3}+ H _2 O$
$SiO _2+4 HF \rightarrow \underset{(Y)}{2 H _2 O}$
$Si +2 CH _3 Cl \xrightarrow[570\, K ]{\text { cu powder }} \underset{(Z)}{\left( CH _3\right)_2 SiCl _2}$