Chemistry MCQs

Page No. 40

Ammonia may be prepared by heating ammonium chloride with_______________?


aWater

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bNaCl

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cAqueous sodium hydroxide

✓


dH2SO4

✖



Downs cell is used to prepare_________________?


aSodium carbonate

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bSodium bicarbonate

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cSodium metal

✓


dSodium hydroxide

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View Answer Sodium metal

The element cesium bears resemblance with________________?


aCa

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bCr

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cBoth of the above

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dNone of the above

✓


View Answer None of the above

Which one of the following is not an alkali metal ?


aFrancium

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bCaesium

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cRubidium

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dRadium

✓


View Answer Radium

Carbonates of lithium are not stable like that of sodium due to________________?


aLow electronegativity

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bLow electropositivity

✓


cLow charge density

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dNot known yet

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View Answer Low electropositivity

Li is different from its family members due to____________________?


asmall size

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bhigh charge density

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cless electropositivity

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dall of the above

✓


View Answer all of the above

The oxides of beryllium BeO is_______________?


aAcidic

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bBasic

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cAmphoteric

✓


dNeutral

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View Answer Amphoteric

Formula of Chile saltpetre is__________________?


aNaNO3

✓


bCaCO3

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cBa (NO3)2

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dNH4Cl

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View Answer NaNO3

A elements are named as alkali metals because_______________?


aTheir oxide are basic

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bTheir oxide and hydroxides are water soluble

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cBoth A and B

✓


dThey are found in earth

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View Answer Both A and B

In base catalyzed reaction of carbonyl compound the catalyst___________________?


aincreases the nucleophilic character of reagent

✓


bincreases electrophilic character of carbonyl compound

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cacidic character of reagent

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dBoth A and B

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