MCQ
Pair of metals which does not dissolve in nitric acid
- ✓$Cr, Al$
- B$Al, Ag$
- C$Ag, Au$
- D$Pt, Hg$
✓
Answer
Correct option: A.
$Cr, Al$
a
chromium and aluminium do not dissolve in concentrated nitric acid because of the formation of a passive form of oxide on the surface.
chromium and aluminium do not dissolve in concentrated nitric acid because of the formation of a passive form of oxide on the surface.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Sulphur $(S)$ containing amino acids from the following are:
→$(a)$ isoleucine
$(b)$ cysteine
$(c)$ lysine
$(d)$ methionine
$(e)$ glutamic acid
A quick supply of $C{l_2}$ gas may be made by reacting crystals of $KMn{O_4}$ with a concentrated solution of
→Amongst $TiF_6^{2 - },CoF_6^{3 - },C{u_2}C{l_2}$ and $NiCl_4^{2 - }$ (Atomic number $Ti = 22,$ $Co = 27,$ $Cu = 29,$ $Ni = 28$). The colourless species are
→The product $A$ formed in the following reaction is: $Image$
→The vapour pressure of pure liquid $A$ is $0.80\,atm$. On mixing a non-volatile $B$ to $A$, its vapour pressure becomes $0.6\,atm$. The mole fraction of $B$ in the solution is
→The colloidal dispersion of a liquid in a liquid is called:
Calculate $E^o_{cell}$ for following cell ............. $\mathrm{V}$
→$Zn(s)\,\,|,\,Zn^{+2}_{(aq.)}\,\,|| Ag^+_{(aq.)}\,\,| Ag(s)$
$E^o_{Zn^{+2}/Zn}\,\,=\,-\,0.76V\,\, ;\,\, E^o_{Ag^+ /Ag}\,\, = 0.80V$
In a particular isomer of $[Co(NH_3)4Cl_2]^0,$ the $Cl - Co - Cl$ angle is $90^o ,$ the isomer is known as
→Night blindness is caused by deficiency of which vitamin?
Chlorine is used in water for