NEET Practice Questions (MCQs) with Answers & Solutions

Zn is extracted from ZnS. The reducing agent used is ______ _ & method of refining is ____

Match the following Set 1

1. Al
2. Fe
3. Zn
4. Ag Set 2 p) Haematite q) Nuggets r)Sphalerite s) Feldspar t) Limonite

Match the following Set 1

1. Pi g iron
2. Cast iron
3. Wroughtiron Set 2 p) Hard & brittle q) Prepared from cast Fe r) Prepared by methyl pigiron s)Malleable t)Fe + 4% C

Match the following Set 1

1. Earthly impurities
2. Sulphideores
3. Bauxide
4. Magnetite Set 2 p) Froth flotation q) Magnetic separation r)Gravity separation s) Leaching

Match the following Set 1

1. Bauxite
2. Zinc blend
3. Copper pyrites
4. Haematite Set 2 p) Bayers q) Blast Furnace r) Hall- heroult s) Bessemerisation t) Fire Clay cylindrical retort

Match the following Set 1

1. Zn
2. Wrought iron
3. Steel
4. Copper Set 2 p) Automobiles q) Galvanising r) BellMeta s) MuntzMetal t) Anchors

Match the following Set 1

1. Non spontaneous
2. spontaneous
3. Equilibrium

Set 2 p) $ \triangle G= 0 $ q) $ K \lt 1 $ r) $ \triangle $ G decreases s) $ K \gt 1 $

Assertion Reason type Statement 1) Magnesium is mainly extracted by electrolysis of molten electrolyte and not by chemical methods. Statement 2) The $ \triangle_i H $ of Mg is very low & hence it is very difficult to reduce $ Mg^{2+}_{(aq)} \rightarrow Mg_{(s)} $

Assertion Reason type Statement 1) In Bayer’s process the ore is heated with Conc. $Ca(OH)_2.$ Statement 2) The ore used in Bayer’s process is atmospheric & is soluble in NaOH therefore ore is concentrated.

Assertion Reason type Statement 1) $ \triangle G = -nFE ^\circ $ is applicable to metallurgy Statement 2) If cellpotential is negative electrolytic reduction of metal ions is possible