MCQ
Which of the following material is not a semiconductor.
- AGermanium
- ✓Graphite
- CSilicon
- DCopper oxide
✓
Answer
Correct option: B.
Graphite
b
Graphite is conductor
Graphite is conductor
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
If $C + {O_2} \to C{O_2} + 94.2\,kcal$ ${H_2} + \frac{1}{2}{O_2} \to {H_2}O + 68.3\,kcal$$C{H_4} + 2{O_2} \to C{O_2} + 2{H_2}O + 210.8\,kcal$ then the possible heat of methane will be......$kcal$
→Which one of the following statements regarding helium is incorrect ?
Consider the following statements :
→In the chemical reaction
$Mn{O_2} + 4HCl \to MnC{l_2} + 2{H_2}O + C{l_2}$
$(1)$ Manganese ion is oxidised
$(2)$ Manganese ion is reduced
$(3)$ Chloride ion is oxidised
$(4)$Chloride ion is reduced.
Which of these statements are correct
$4.5$ moles each of hydrogen and iodine is heated in a sealed ten litre vessel. At equilibrium, $3$ moles of HI were found. The equilibrium constant for $H _2( g )+ I _2( g ) \rightleftharpoons 2 HI ( g )$ is .......
→The first ionization energy for Li is $5.4 \,eV $ and electron affinity of $Cl$ is $3.61\,eV.$ The $\Delta H$ (in $kJ/mol$) for the reaction $Li(g) + Cl(g) \to L{i^ + } + C{l^ - }$ is (if resulting ions do not combine with each other) $(1\,eV = 1.6 \times {10^{ - 19}}\,J)$
→Simplified absorption spectra of three complexes $((i),$$( ii)$ and $( iii ))$ of $M ^{ n +}$ ion are provided below; their $\lambda_{\max }$ values are marked as $A, B$ and $C$ respectively. The correct match between the complexes and their $\lambda_{\max }$ values is
→$(i)$ $\left[ M ( NCS )_{6}\right]^{(-6+ n )}$
$(ii)$ $\left[ MF _{6}\right]^{(-6+ n )}$
$(iii)$ $\left[ M \left( NH _{3}\right)_{6}\right]^{ n ^{+}}$
The highest possible oxidation states of uranium and plutonium, respectively, are
$N{a^ - }\xleftarrow{x}Na\xrightarrow{{5\,eV}}N{a^ + }$
→Predict the value of $'X'$ is .............. $\mathrm{eV}$
Which among the following alkyl halide give more than one product upon Dehydrohalogenation
the heat of combustion of carbon monoxide at constant volume and at ${17\,^o}C$ is $-283.3 \,kJ$ , then its heat of combustion at constant pressure.....$kJ$
→$(R = 8.314\,J\,{\rm{degre}}{{\rm{e}}^{{\rm{ - 1}}}}mo{l^{ - 1}})$