CBSE
Multiple Choice QuestionsWhich of the following oxide is most acidic?
As2O3
P2O5
Sb2O3
Bi2O3
In the structure of ClF3, the number of lone pair of electrons on central atom ‘Cl’ is
One
Two
Three
Four
In which of the following compounds, sulphur show maximum oxidation number?
H2SO4
SO3
H2S2O7
All have same oxidation number for sulphur
Which of the following statements is not true for halogens?
All form monobasic oxyacids
All are oxidizing agents
Chlorine has the highest electron-gain enthalpy
All but fluorine show positive oxidation states
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
Na
K
Rb
Rb
Consider the reaction, H2 + X2 2HX, where X is halogen. The reactivity of halogens decrease in the order of
Cl2 > F2 > Br2 > I2
I2 > Br2 > F2 > Cl2
F2 > Cl2 > Br2 > I2
I2 > Br2 > Cl2 > F2
when CO2 is bubbled through a solution of barium peroxide in water then
Carbonic acid is formed
O2 is released
H2O2
No reaction occurs
Among the following compounds, which will produce POCl3 with PCl5
Only O2
O2 and CO2
CO2, O2 and P4O10
SO2, H2O, H2SO4 and P4O10
In which pair of ions both the species contain S – S bond?
S2O72–, S2O32–
S4O62–, S2O32–
S2O72–, S2O82–
S2O72–, S2O82–
Which one of the following elements is unable to form ion?
Ga
Al
In
B
