One gas bleaches the colour of flowers by reduction, while the other gas bleaches by oxidation. The two gases, respectively, are:
1.
2.
3.
4.
Which of the following halides cannot be hydrolysed at room temperature?
(1)
(2)
(3)
(4)
Which parent oxy acid does not have its own hypo acid?
1. H2SO2
2. HNO2
3. H3PO3
4. HClO3
Consider the following reactions :
Then according to given information the incorrect statement is :
(1) During the (i) reaction the hybridisation of 15th group element does not
changed
(2) During the (ii) reaction the hybridisation of 16th group element
changed
(3) During the (iii) reaction the hybridisation of 13th group element does not
changed
(4) During the (iv) reaction the hybridisation of 18th group element does not
changed
Consider the oxy acids series, here value of n is 1 to 4. Then incorrect statement regarding these oxy acids is :
(1) Acidic character of oxy acids increases with increasing value of n.
(2) oxidising power of oxy acids increases with decreasing value of n.
(3) Thermal stability of oxy acids decreases with increasing value of n.
(4) bond order decreases with decreasing value of n
The correct statement regarding molecular ion is :
(1) On decreasing value of bond order increases
(2) On the increasing value of bond length increases
(3) On the increasing value of oxidation number of central atom increases
(4) On the increasing value of hybrid orbitals on the central atom increase
Bromine is commercially prepared from sea water by displacement reaction
gas thus formed is dissolved into solution of and then pure is obtained by treatment of the solution with :
Cl2(g) + Ba(OH)2 → X(aq) + BaCl2 + H2O
X + H2SO4 → Y + BaSO4
Y \(\xrightarrow[]{\Delta \ > \ 365 \ K}\) Z + H2O + O2
Y and Z are respectively :
1. HClO4, ClO2
2. HClO3, ClO2
3. HClO3, ClO6
4. HClO4, Cl2O7
Auto-oxidation of bleaching powder gives :
(1) only calcium chlorate
(2) only calcium chloride
(3) only calcium hypochlorite
(4) both (a) and (b)