MCQ
Which is an amphoteric oxide
- ✓$ZnO$
- B$CaO$
- C$BaO$
- D$SrO$
✓
Answer
Correct option: A.
$ZnO$
a
(a) $ZnO$ is an amphoteric oxide,
(a) $ZnO$ is an amphoteric oxide,
$ZnO + {H_2}S{O_4} \to ZnS{O_4} + {H_2}O$
$ZnO + 2NaOH \to N{a_2}Zn{O_2} + {H_2}O$
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
Rank the hydrogen atoms $(H_a , H_b, H_c,)$ in the following molecules according to their acidic strengths
→The unit $J \,P{a^{ - 1}}$ is equivalent to
→According to Aufbau's principle, which of the three $4d,\,5p$ and $5s$ will be filled with electrons first
→Stadard electromotive force for following cell is $ Zn|Zn^{+2}\, (1\,M)| |I^{\circleddash}\,(1\,M)| CuI| Cu$ if halfcell reaction ........... $\mathrm{V}$
→$CuI_{(s)} + e^{\circleddash} \to Cu_{(s)} + I^{\circleddash}_{(aq)}$ ; $E^o = -0.17\, V$
$Zn^{+2}_{(aq)} + 2e^{\circleddash} \to Zn_{(s)}$ ; $E^o = -0.76\, V$
Which of the following metal is expected to have the highest third ionization enthalpy?
Technetium, the element below manganese in the Periodic Table, would be expected to have high values for its
$(I)$ melting point $(II)$ boiling point $(III)$ density
→$(I)$ melting point $(II)$ boiling point $(III)$ density
Radius of the isoelectronic species
Liquid $A$ and $B$ form an ideal solution. The vapour pressure of pure liquids A and B are 350 and 750 mm Hg respectively at the same temperature. If $\mathrm{x}_{\mathrm{A}}$ and $x_{B}$ are the mole fraction of $A$ and $B$ in solution while $y_{A}$ and $y_{B}$ are the mole fraction of $A$ and $B$ in vapour phase then :
→The pesticide $DDT$ slowly changes to
→The chemical reaction: $Ba{O_{2(S)}}$ $\rightleftharpoons$ $Ba{O_{(s)}} $ $ + {O_{2(g)}}$’ $\Delta H = \,+ ve$. In equilibrium condition, pressure of $O_2$ depends upon
→