In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
- A
Minimize the heat loss due to radiation
- B
Protect aluminium produced from oxygen
- C
Dissolve bauxite and render it conductor of electricity
- D
Lower the melting point of bauxite
Similar Questions
Assertion : Boron is metalloid.
Reason : Boron shows metallic nature.
Assertion : Boron is metalloid.
Reason : Boron shows metallic nature.
- [AIIMS 1997]
Two students were given the task to prepare an adduct $NH_3 \to BH_3$ at low temperature :-
Student $I$ :- She mixed $B_2H_6$ and $NH_3$
Student $II$ :- He mixed $B_2H_6$ with $THF$ followed by addition of $NH_3$
Which student is expected to get the $CORRECT$ final product ?
Two students were given the task to prepare an adduct $NH_3 \to BH_3$ at low temperature :-
Student $I$ :- She mixed $B_2H_6$ and $NH_3$
Student $II$ :- He mixed $B_2H_6$ with $THF$ followed by addition of $NH_3$
Which student is expected to get the $CORRECT$ final product ?
During metallurgy of aluminium bauxite is dissolved in cryolite because
During metallurgy of aluminium bauxite is dissolved in cryolite because
$Al_4C_3$ is an ionic carbide, named as
$Al_4C_3$ is an ionic carbide, named as
Match List$-I$ with List$-II :$
List$-I$
List$-II$
$(a)$ $\mathrm{NaOH}$
$(i)$ Acidic
$(b)$ $\mathrm{Be}(\mathrm{OH})_{2}$
$(ii)$ Basic
$(c)$ $\mathrm{Ca}(\mathrm{OH})_{2}$
$(iii)$ Amphoteric
$(d)$ $\mathrm{B}(\mathrm{OH})_{3}$
$(e)$ $\mathrm{Al}(\mathrm{OH})_{3}$
Choose the most appropriate answer from the option given below :
Match List$-I$ with List$-II :$
| List$-I$ | List$-II$ |
| $(a)$ $\mathrm{NaOH}$ | $(i)$ Acidic |
| $(b)$ $\mathrm{Be}(\mathrm{OH})_{2}$ | $(ii)$ Basic |
| $(c)$ $\mathrm{Ca}(\mathrm{OH})_{2}$ |
$(iii)$ Amphoteric |
| $(d)$ $\mathrm{B}(\mathrm{OH})_{3}$ | |
| $(e)$ $\mathrm{Al}(\mathrm{OH})_{3}$ |
Choose the most appropriate answer from the option given below :
- [JEE MAIN 2021]