Chemistry MCQs

Page No. 6

Parke’s process is used in the extraction of________?


aIron

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bSodium

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cSilver

✓


dZinc

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View Answer Silver

Which metal is used as a reducing agent in Smelting______?


aC

✓


bZn

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cAl

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dCu

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View Answer C

A process used for the Concentration of Ore is________?


aRoasting

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bForth flotation

✓


cElectrolysis

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dDistillation

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View Answer Forth flotation

Which Oxide of Manganese is amphoteric?


aMnO2

✓


bMn2O3

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cMn2O7

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dMnO

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View Answer MnO2

The purpose of Smelting an ore is to________?


aReduce it

✓


bOxidize it

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cObtain an alloy

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dSeparate volatile impurities

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View Answer Reduce it

Which set of quantum numbers is not allowed?


an=2,l=1,m1=0,ms=+1/2

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bn=2,l=2,m1=1,ms=+1/2

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cn=2,l=0,m1=0,ms=-1/2

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dn=2,l=2,m1=1,ms=-1/2

✓


View Answer n=2,l=2,m1=1,ms=-1/2

Find the PH of a 0.001 M solution of Nitric acid HNO3?


a2

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b3

✓


c4

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d5

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View Answer 3

Potassium Permanganate is used for purifying drinking water, because_________?


aIt is a sterilising agent.

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bIt dissolves the impurities of water.

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cIt is a reducing agent.

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dIt is an oxidising agent.

✓



Marsh gas is_______?


aNitrogen

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bEthane

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cMethane

✓


dHydrogen

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View Answer Methane

The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?


aBromine

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bFluorine

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cchlorine

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dSulphur

✓


View Answer Sulphur

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