Multiple Choice QuestionsWhich of the following is pseudo halogen?
IF7
(CN)2
ICl
I
B.
(CN)2
Ions which consists of two or more electronegative atoms of which at least one is nitrogen and have properties similar to those of halide ions are called pseudohalide ions. Just as halide ions have corresponding diatomic molecules, pseudohalide ions have also corresponding dimeric molecules. These are called pseudo halogens and show properties similar to those of halogens.
e.g. (CN)2, (SCN)2, (OCN)2
Correct order of electron affinities of halogens is
F> Cl> Br> I
I> Br> Cl> F
Cl> F>I>Br
Cl>F>Br>I
If NO2(N2O4) is dissolved in NaOH, we get solution of
NaNO2
NaNO3
mixture of NaNO2 and NaNO3
NaNO4
Which one of the following gases has both oxidising as well as reducing property?
CO
SO2
H2S
PH3
Among the following, the group of molecules that undergoes rapid hydrolysis is
SF6, Al2Cl6, SiMe4
BCl3, SF6, SiCl4
BCl3, SiCl4, PCl5
SF6, Al2Cl6, SiCl4
A silver iodide sol has been prepared by adding slight excess of KI solution to AgNO3 solution having the same concentration as that of KI solution. The silver iodide sol particles are
positively charged
negatively charged
neutral
partially positively and partially negatively charged
P4O10 on reacting with water does not form
tetrametaphosphoric acid
phosphorus acid
orthophosphoric acid
pyrophosphoric acid
Chlorine reacts with carbon disulphide in presence of I2 catalyst to form
CHCl3
CHI3
CCl4
C2H5Cl
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