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🩺 NEET🧪 Chemistry

General Principles and Processes of Isolation of Elements

3 NEET Chemistry previous year questions on General Principles and Processes of Isolation of Elements — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW

The reaction representing the Mond process for metal refining is

[JEE Main 2023, 29 Jan (Shift 1)]

a

\(Ni +4 CO \xrightarrow{\Delta} Ni ( CO )_4\)

b

\(2\mathrm{K}\left[\mathrm{Au}{\left(\mathrm{CN}\right)}_{2}\right]+\mathrm{Zn}\overset{∆}{\to }{\mathrm{K}}_{2}\left[\mathrm{Zn}{\left(\mathrm{CN}\right)}_{4}\right]+2\mathrm{Au}\)

c

\(Zr +2 I _2 \xrightarrow{\Delta} ZrI _4\)

d

\(ZnO + C \xrightarrow{\Delta} Zn + CO\)

✓ Correct answer: a)

\(Ni +4 CO \xrightarrow{\Delta} Ni ( CO )_4\)

Explanation

Mond's process is used to refine Ni.
\[
Ni +4 CO \rightarrow\left[ Ni ( CO )_4\right]
\]

Q2

In Hall - Heroult process, the following is used for reducing
\(Al _2 O _3\) :

[JEE Main 2023, 8 Apr (Shift 2)]

a

Graphite

b

Magnesium

c

\(Na _3 AlF _6\)

d

\(CaF _2\)

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Q3

The major component of which of the following ore is sulphide based mineral?

a

Calamine

b

Siderite

c

Sphalerite

d

Malachite

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