- Home
- Standard 12
- Chemistry
Among statements $(a)- (d),$ the correct ones are
$(a)$ Lime stone is decomposed to $CaO$ during the extraction of iron from its oxides.
$(b)$ In the extraction of silver, silver is extracted as an anionic complex.
$(c)$ Nickel is purified by Mond's process.
$(d)$ $Zr$ and $Ti$ are purified by Van Arkel method.
$(c)$ and $(d)$ only
$(a), (c)$ and $(d)$ only
$(a),$ $(c)$ and $(d)$ only
$(a), (b), (c)$ and $(d)$
Solution
$(a)$ $CaCO _{3} \stackrel{\Delta}{\longrightarrow} CaO + CO _{2}$ {In Blast furnace } lime stone
$(b)$ Ag form cyanide complex $\left[ Ag ( CN )_{2}\right]^{-}$ during cyaride process
$Ag / Ag _{2} S + CN ^{\ominus} \rightarrow\left[ Ag ( CN )_{2}\right]^{-}$
$(c)$ $Ni$ is purified by mond's process
$(d)$ $Zr$ and $Ti$ are purified by van arkel method
All $(a),$ $(b),$ $(c),$ $(d)$ are correct statements
Thus correct option is $(4)$
Similar Questions
Match Column $-I$ with Column $-II$ and select the correct answer using the codes given below
| Column $-I$ (metals) | Column $-II$ (Ores) |
| $(A)$ Tin | $(1)$ Calamine |
| $(B)$ Zinc | $(2)$ Cassiterite |
| $(C)$ Titanium | $ (3)$ Cerrusite |
| $(D)$ Lead | $(4)$ Rutile |
