MCQ
Bell metal is an alloy of
- A$Cu,\,Zn$ and $Sn$
- B$Cu,\,Zn$ and $Ni$
- C$Cu$ and $Zn$
- ✓$Cu$ and $Sn$
✓
Answer
Correct option: D.
$Cu$ and $Sn$
d
(d)$\mathop {Cu}\limits_{80\% } + \mathop {Sn}\limits_{20\% } \to {\rm{Bell metal}}$
(d)$\mathop {Cu}\limits_{80\% } + \mathop {Sn}\limits_{20\% } \to {\rm{Bell metal}}$
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
On the basis of the following $E^o$ values, the strongest oxidizing agent is
→${[Fe\,{(CN)_6}]^{4 - }}\, \to \,{[Fe{(CN)_6}]^{3 - }}\, + \,{e^ - }\,;\,$ ${E^o}\, = \, - \,0.35\,V$
$\,F{e^{2 + }}\, \to \,F{e^{3 + }}\, + \,{e^ - }\,;$ ${E^o}\, = \, - \,0.77\,V$
What is the $pH$ of $Ba{(OH)_2}$ if normality is $10$
→Ethanol and $HCO_2H$ can't be distinguished by
→Cyclohexadiene contains ______ vinylic and _____ allylic hydrogen atoms ?
The bond enthalpies of $H_2,\, X_2$ and $HX$ are in the ratio of $2 : 1 : 2$ . If the enthalpy for formation of $HX$ is $-50\, kJ\, mol^{-1}$ , the bond enthalpy of $H_2$ is .....$kJ\,mol^{-1}$
→Match $List-I$ with $List-II$.
→| $List-I$ | $List-II$ |
| $(A)$ $\Psi_{ MO }=\Psi_{ A }-\Psi_{ B }$ | $(I)$ Dipole moment |
| $(B)$ $\mu=Q \times I$ | $(II)$ Bonding molecular orbital |
| $(C)$ $\frac{N_{b}-N_{a}}{2}$ | $(III)$ Anti-bonding molecualr orbital |
| $(D)$ $\Psi_{ MO }=\Psi_{ A }+\Psi_{ B }$ | $(IV)$ Bond order |
Phenol condenses with phthalic anhydride in presence of conc. $H_2SO_4$ to form
→the nitration will mainly take place at position -
Bond order is a concept in the molecular orbital theory. It depends on the number of electrons in the bonding and antibonding orbitals. Which of the following statements is true about it ? The bond order
The active ion in Tollen's reagent is