Question

2.ThegeneralformulaofahydrocarbonisCnH2n.Thefollowingdescription

correctlydescribesit

a.AlkyneSaturatedhydrocarbon b.AlkeneSaturatedhydrocarbon c.

Alkanesaturatedhydrocarbon d.Alkeneunsaturatedhydrocarbon

e.Alkyneunsaturatedhydrocarbon.

Forquestionnumbers3,4and5,twostatementsaregiven-onelabelled

Assertion(A)andtheotherlabelledReason(R).Selectthecorrect

answertothesequestionsfromthecodes(a),(b),(c)and(d)asgiven

below:

a)BothAandRaretrue,andRiscorrectexplanationoftheassertion.

b)BothAandRaretrue,butRisnotthecorrectexplanationofthe

assertion.

c)Aistrue,butRisfalse.

d)Aisfalse,butRistrue.

3.Assertion:Theinnerliningofsmallintestinehasnumerousfingurelike

projectionswhichincreasethesurfaceareaofabsorption

Reason:Thevilliincreasethesurfaceareaforabsorption.

4.Assertion:LeadNitrateonthermaldecompositiongivesLeadOxide,

browncolourednitrogendioxideandOxygengas.

Reason:LeadnitratereactswithPotassiumiodidetoformyellow

precipitateofleadiodideandthereactionisdoubledisplacementaswell

asprecipitationreaction.

5.Assertion:Fuseisasafetydevicewhichisinstalledtopreventelectrical

shortcircuitsandpossiblefires.

Reason:Fuseconsistsoftin-platedcopperwirehavinglowmeltingpoint,

whichmeltsandbreaksthecircuitifthecurrentexceedssafevalue.​

Answer 1

Answer:

AlkeneSaturatedhydrocarbon

Explanation: