If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal,then the purification of metal may be carried out by
- APoling
- BZone refining
- CElectrolytic refining
- DCupellation
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Similar Questions
$A$ random variable $X$ has the following probability distribution:
$X$ $1$ $2$ $3$ $4$ $5$ $P(X)$ $k^2$ $2k$ $k$ $2k$ $5k^2$
Then $P(X > 2)$ is equal to:
| $X$ | $1$ | $2$ | $3$ | $4$ | $5$ |
| $P(X)$ | $k^2$ | $2k$ | $k$ | $2k$ | $5k^2$ |
Then $P(X > 2)$ is equal to:
If $(1+x+x^2+x^3)^5 = \sum_{k=0}^{15} a_k x^k$,then $\sum_{k=0}^7 a_{2k}$ is equal to
Which of the following is used for making optical instruments?
$\frac{\sqrt{2} \cos 45^{\circ}+\cos 56^{\circ}+\cos 58^{\circ}-\cos 66^{\circ}}{\sqrt{2} \cos 28^{\circ} \cos 29^{\circ} \sin 33^{\circ}} = $
The cell junctions called tight,adhering,and gap junctions are found in
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