1
NEET 2017
MCQ (Single Correct Answer)
+4
-1
In which pair of ions both the species contain S $$-$$ S bond?
A
S4O62$$-$$, S2O32$$-$$
B
S2O72$$-$$, S2O82$$-$$
C
S4O62$$-$$, S2O72$$-$$
D
S2O72$$-$$, S2O32$$-$$
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Extraction of gold and silver involves leaching with CN$$-$$ ion. Silver is later recovered by
A
distillation
B
zone refining
C
displacement with Zn
D
liquation
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Name the gas that can readily decolourise acidified KMnO4 solution.
A
SO2
B
NO2
C
P2O5
D
CO2
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
HgCl2 and I2 both when dissolved in water containing I$$-$$ ions, the pair of species formed is
A
HgI2, I$$-$$
B
HgI$$_4^{2 - }$$, I$$_3^{ - }$$
C
Hg2I2, I$$-$$
D
HgI2, I$$_3^{ - }$$
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