Chemistry MCQs

Page No. 108

The mass of one mole of electron is________________?


a1.008

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b0.55

✓


c0.184

✖


d1.637

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View Answer 0.55

For industrial preparation of CH3CHO catalytic promoter is_________________? 0


aPdCl2

✖


bCu2Cl2

✓


cCuCl2

✖


dPbCl2

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View Answer Cu2Cl2

Ethy1 chloride on reduction in the presence of Zn/HCI produces___________________?


an. butane

✖


bEthanol

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cEthane

✓


dDiethyl ether

✖


View Answer Ethane

When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________?


aCarboxylic acid

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bEthanoic acid

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cPropanoic acid

✓


dButanoic acid

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View Answer Propanoic acid

Which one of the following will be sulphonated readily ?


aChlorobenzene

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bToluene

✓


cNitrobenzene

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dBenzene

✖


View Answer Toluene

When benzene is heated in air with V2O5 at 450°C yields_________________?


aPhenol

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bMaleic anhydride

✓


cGlyoxal

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dBenzoic acid

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View Answer Maleic anhydride

In 1 – pentene -4- yne the carbon exhibit hybridization_________________?


asp3 – sp2

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bsp2 – sp

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csp2 – sp

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dsp3 – sp2 – sp

✓


View Answer sp3 – sp2 – sp

Which one of the following looks odd__________________?


aH2SO4

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bKMnO4

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cH2S

✓


dK2CrO4

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View Answer H2S

The most paramagnetic element is____________________?


aIron

✓


bCobalt

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cChromium

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dManganese

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View Answer Iron

Which molecule has the highest bond energy among the halogens_________________?


aFluorine

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bChlorine

✓


cIodine

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dBromine

✖


View Answer Chlorine

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