1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Roasting of sulphides gives the gas X as a byproduct. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing agent and its acid has never been isolated. The gas X is
A
CO2
B
SO3
C
H2S
D
SO2
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Identify the correct order of solubility in aqueous medium.
A
Na2S > CuS > ZnS
B
Na2S > ZnS > CuS
C
Cus > ZnS > Na2S
D
ZnS > Na2S > CuS
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Which of the following statements about the interstitial compounds is incorrect?
A
They are much harder than the pure metal.
B
They have higher melting points than the pure metal.
C
The retain metallic conductivity.
D
They are chemically reactive.
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Which of the following lanthanoid ions is diamagnetic?
(At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
A
Eu2+
B
Yb2+
C
Ce2+
D
Sm2+
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