Chapter 4rth LIQUIDS AND SOLIDS MCQs
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1 Chpter 4rth LIQUIDS AND SOLIDS MCQs Q.1 Ioni solis re hrterize y () low melting points () goo onutivity in soli stte () high vpour pressure () soluility in polr solvents Q.2 Amorphous solis. () hve shrp melting points () unergo len levge when ut with knife () hve perfet rrngements of toms () n presses smll regions of orerly rrngements of toms Q.3 The fore of ttrtion etween the toms of helium is () hyrogen oning () oorinte ovlent on () ovlent on () lonon ispersion fore Q.4 Whih of the following is pseuo-soli () CF2 () Glss () NCl () All Q.5 Dimon is onutor euse () It hs tight struture () It hs high ensity () There is no free eletron present in the rystl of imon to onut eletriity () None of the ove Q.6 The wekest intermoleulr for () ipole ipole fore () eletrostti fore etween ions () ion ipole fore () ipole inue ipole fore Q.7 In liquis intermoleulr fores re () very wek () very strong () resonly strong () ion ipole fore Q.8 Vlues of het of vporiztion for liquis, with strong ipole ipole fores will e () very high () very low () resonly high () negligile
2 Q.9 Instntneous ipole inue ipole fore is lso lle () ipole fore () lonon ispersion () hyrogen oning () none of the ove Q.10 Down the group polrizility generlly () inreses () ereses () remins onstnt () o not follow regulr tren Q.11 Tren of oiling points of hlogens from fluorine to ioine is tht it. () ereses () inreses () remins onstnt () negligile Q.12 Moleules of hyro rons with lrge hin lengths experiene () repulsive fores () strong ttrtive fore () weker ttrtive fores () no ttrtive fore Q.13 Hyrorons whih generlly hve high moleulr msses exist is. () soli form () liqui form () vpour form () gseous form Q.14 Exeptionlly low ii strength of HF is ue to () strong polr on () smll size of fluorine () strong hyrogen oning () Vner Wl s fores Q.15 Long hin of mino is re oile out one nother into spirl y. () ovlent on () ioni on () hyrogen on () Vner Wl s fores Q.16 Evportion of wter is possile t () 100oC () 0oC () t ll tempertures () ove 100oC Q.17 Boiling point is low for liqui with () high vpour pressure t given temperture () low vpour pressure t given temperture () very high vpour pressure () very low vpour pressure Q.18 At equilirium rte of evportion n rte of onenstion () eome very high () eome very low () n never e equl () eome equl Q.19 In n open system vpour pressure of wter t 100oC t se level is
3 () 700 mm of Hg () 760 mm of Hg () 670 mm of Hg () 1000 mm of Hg Q.20 Molr het of vporiztion of wter is () kj/mol () kj/mol () 18 kj/mol () 40.6 kj/mol Q.21 When externl pressure is 23.7 torr oiling point of wter is () 100oC () 200oC () 98oC () 25oC Q.22 Distilltion uner very reue pressure is lle () frtionl istilltion () istilltion () vuum estrutive istilltion () estrutive istilltion Q.23 Wter my oil t 120oC when externl pressure is () 760 torr () 100 torr () 1489 torr () 700 torr Q.24 Amount of het sore when one mole of soli melts into liqui form t its melting point is lle () molr het of sulimtion () het of vporiztion () ltent het of fusion () molr het of fusion Q.25 Ethnol is muh more solule in wter thn ethyl ethnute whih one of the following sttement orretly ount for this () ethnol is polr moleule ut ethyl ethnote is non polr () ethnol is non polr moleule ut ethyl ethnote is polr () hyrogen on is forme etween H tom of the OH group in ethnol n O tom of wter moleule () hyrogen on is forme etween the H tom of the OH group in ethnol n hyrogen of the wter moleule Q.26 The oiling point of liqui will e () lower t high ltitue () higher t high ltitue () sme t se level n high ltitues () equl to tmospheri pressure Q.27 The proess in whih liquis n e me to oil t low temperture is lle () vuum istilltion () estrutive istilltion () istilltion () vuum estrutive istilltion
4 Q.28 Why is the oiling point of methne greter thn tht of neon () moleule of methne hs greter mss () moleule of methne hs more eletrons thn moleule of neon () the moleules of methne hve stronger intermoleulr fores thn those of neon () the moleule of methne is polr ut tht of neon is not Q.29 The mount of het require to vporize one mole of liqui t its oiling point is lle () molr het of vporiztion () molr het of fusion () ltent het of fusion () molr het of sulimtion Q.30 Whih of the elements in its rystlline form will hve the lowest enthlpy hnge of vporiztions () hlorine () rgon () phosphorous () silion Q.31 Crystls show vrition in physil properties epening upon the iretion. The property is lle () isomorphism () polymorphism () nisotropy () isotropy Q.32 Certin melt to turi liqui phse with properties of liquis s well s some egree of orer like soli. Suh turi liquis re lle () norphous soli () vitreous soli () rystlline soli () liqui rystl Q.33 Isomorphous rystls show () sme hemil properties () sme physil properties () sme rystlline form () sme melting point Q.34 Existene of n element in more thn form is known s () llotropy () isomorphism () isotropy () none of these Q.35 Crystlline forms of the sme, sustne n oexist in equilirium with eh other t its () melting point () trnsition temperture () oiling point () none of these Q.36 Crystl lttie of sustne n e tgorise into () five types () seven types () six types () none of these
5 Q.37 Covlent solis re ompose of () ions () ifferent moleules () neutrl toms () ny of the ove Q.38 Cron toms of imon re () sp hyriize () sp2 hyriize () sp3 hyriize () unhyriize Q.39 Moleulr rystls re generlly () hr () soft () unstle () stle Q.40 Ioni rystls re () hr () soft () rittle () morphous ANSWER
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