The methods chiefly used for the extraction of lead and tin from their ores are respectively
self reduction and carbon reduction
self reduction and electrolytic reduction
carbon reduction and self reduction
cyanide process and carbon reduction
Additional Questions
Which do not decolourise KMnO4 aqueous solution? |
Answer |
(NH4)2Cr2O7 on heating gives a gas which is also given by |
Answer |
Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect? |
Answer |
Which of the statements is not true? |
Answer |
During the extraction of gold the following reactions take place Au + CN– + H2O $\xrightarrow{O_2}$ [X] [X] + Zn → [Y] + Au X and Y are respectively |
Answer |
Which of the following is a Ferrous alloy |
Answer |
Identify the incorrect statement among the following |
Answer |
Which of the following pairs of elements cannot form an alloy? |
Answer |
Which of the following types of metals form the most efficient catalysts? |
Answer |
Which one of the following exists in the oxidation state other than +3? |
Answer |