Consider the following:Statement-I : In the e | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Statement-$I$ is correct. In the Hall-Heroult process,pure $Al_2O_3$ has a very high melting point and is a poor conductor of electricity. Adding

Vedclass · Accepted Answer

Statement-$I$ is correct,but statement-$II$ is not correct

Vedclass · Answer

(C) Statement-$I$ is correct. In the Hall-Heroult process,pure $Al_2O_3$ has a very high melting point and is a poor conductor of electricity. Adding $Na_3AlF_6$ (cryolite) and $CaF_2$ (fluorspar) lowers the melting point of the mixture and increases its electrical conductivity.Statement-$II$ is incorrect. Zirconium $(Zr)$ is purified by the Van Arkel method,which involves the formation of a volatile iodide $(ZrI_4)$ followed by its thermal decomposition. Zone refining is typically used for semiconductors like $Si$ and $Ge$.

Consider the following:
Statement-$I$ : In the extraction of $Al$ by Hall-Heroult process,pure $Al_2O_3$ mixed with $Na_3AlF_6$ lowers its melting point and increases conductivity.
Statement-$II$ : Zirconium metal is purified by zone refining method.

Similar Questions

Which alloy contains a non-metal?

In the leaching of $Ag_2S$ with $NaCN$,a stream of air is also passed. This is because of:

Identify the correct statements from the following:
$(i)$ In the extraction of $Ag$ and $Au$,zinc is used as a reducing agent.
$(ii)$ Impure zinc can be refined by distillation method.
$(iii)$ Malachite is an ore of nickel.

Which of the following statements is not correct?

The statement that is $INCORRECT$ about Ellingham diagram is :

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Consider the following:Statement-$I$ : In the extraction of $Al$ by Hall-Heroult process,pure $Al_2O_3$ mixed with $Na_3AlF_6$ lowers its melting point and increases conductivity.Statement-$II$ : Zirconium metal is purified by zone refining method.