MCQ
Which one of the following is employed as antihistamine?
- AOmeprazole
- BChloramphenicol
- ✓Diphenhydramine
- DNorethindrone
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Statement $I$ : The higher oxidation states are more stable down the group among transition elements unlike p-block elements.
Statement $II$ : Copper can not liberate hydrogen from weak acids.
In the light of the above statements, choose the correct answer from the options given below :
$(I)\,\, AgNO_3$
$(II)\,\, CaCO_3$
$(III) \,\,Pb(NO_3)_2$
$(IV) \,\,Na_2CO_3$
| Column $A$ | Column $B$ |
| $(i) \;\mathrm{Na}_{2} \mathrm{O}$ | $(a)$ Neutral |
| $(ii) \;\mathrm{Al}_{2} \mathrm{O}_{3}$ | $(b)$ Basic |
| $(iii)\;\mathrm{N}_{2} \mathrm{O}$ | $(c)$ Acidic |
| $(iv)\;\mathrm{Cl}_{2} \mathrm{O}_{7}$ | $(d)$ Amphoteric |
Which of the following options has all correct palrs
