The electronic configuration of an element is 1s2,2s2 2p6, 3s2 3p6, 3d10, 4s2 4p3. To which of the following elements it is similar in properties?
Boron
Oxygen
Nitrogen
Chlorine
Which of the following will replace Br2 from the aqueous solution having bromide ion?
Cl2
I
I2
Cl
In which of the following compound the oxidation number of oxygen is +2?
H2O2
CO2
H2O
OF2
D.
OF2
Let the oxidation state ofoxygen is 'x'
OF2
x + 2(-1) = 0 [∴ F is most electronegative]
x = +2
Hence, the oxidation state of oxygen is +2 in OF2.
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