Ans11 (Repaired)

8/18/2019 Ans11 (Repaired)

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1. C B A A2. B C A BB C D BC C C BD D B C

Section A:

SECTION B

NO. ANSWER MARK1 (a) equal

() it !oul" #in$ i% !ei&'t i# &eate t'an uoant %oce.

(c) it !ill *o+e# %o!a"# !it' &eate #,ee"-- it acceleate# %o!a"

(") it continue# to *o+e %o!a" ut #lo!# "o!n.

Due to it# inetia t'e oat #till !ill *o+e# %o!a" ut t'e &eate

!ate e#i#tance #lo! "o!n it# *otion.

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2. (a) t'e *ale# *o"el act# a# *olecule# . W'en t'e *ale# lea+in&

ta it *ean# t'e *olecule# I# e#ca,e" %o* t'e liqui" t'e ,oce##

o% e+a,oation i# occue".

() in o"e to e+a,oate t'e alco'ol it equie# ene&./eat ene& i# ta$en %o* t'e #$in an" t'e #$in %eel# col".

(c) (i) a ,'a#e tan#ition %o* t'e liqui" #tate to t'e &a# #tate

u#uall occuin& !'en a liqui" i# 'eate" to it# oilin& ,oint.

(ii) no c'an&e a# t'e #u%ace aea !oul" not a0ect# t'e oilin& ,oint

(iii) Pt =mL

60×5×60=0.5×L

L=36000 J kg−1

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(a)() ,lane *io *a ,o"uce *ulti,le i*a&e. Conca+e *io ale

to *a&ni% t'e #tuctue o% a toot' an" al#o t'e ca+it.

http://chemistry.about.com/od/chemistryglossary/a/phasetransition.htmhttp://chemistry.about.com/od/chemistryglossary/a/liquiddef.htmhttp://chemistry.about.com/od/chemistryglossary/a/gasdefinition.htmhttp://chemistry.about.com/od/chemistryglossary/a/liquiddef.htmhttp://chemistry.about.com/od/chemistryglossary/a/boilingpointdef.htmhttp://chemistry.about.com/od/chemistryglossary/a/liquiddef.htmhttp://chemistry.about.com/od/chemistryglossary/a/gasdefinition.htmhttp://chemistry.about.com/od/chemistryglossary/a/liquiddef.htmhttp://chemistry.about.com/od/chemistryglossary/a/boilingpointdef.htmhttp://chemistry.about.com/od/chemistryglossary/a/phasetransition.htm


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. (a) 3e##ue 4a!

() (i)

(ii) 526 7C

(c)

(") Kinetic ene& incea#e" -- Rate o% colli#ion et!een ,aticle#

an" t'e !all incea#e.(e) #u&&e#tion: #li&'tl le## t'an 28 $3a

Rea#on: a%te a lon& 9oune t'e %iction et!een t'e #u%ace o%

t'e oa" an" te# !ill ,o"uce 'eat !'ic' !ill incea#e t'e

te*,eatue ,e##ue in t'e te# !ill incea#e# too.

Section c

(a) T'e atio o% #in i to #in -- t'e atio o% t'e #,ee" o% li&'t in

+acuu* o ai to t'e #,ee" o% li&'t in *e"iu*.

() 1. T'e inci"ent an&le# in ot' ,i#*# ae t'e #a*e.

2. T'e e%acti+e in"e o% &la## i# 'i&'e t'an t'e e%acti+e in"e o%

!ate.

. T'e citical an&le o% &la## i# #*alle t'an t'e citical an&le o%

!ate.

. T'e 'i&'e t'e e%acti+e in"e t'e #*alle t'e citical an&le.

;. I% t'e inci"ent an&le < t'e citical an&le o% &la## !ill e#ult in

total intenal e=ection -- !'ile !ate !'ic' 'a# i&&e citical

an&le !ill e#ult in e%action o% li&'t.

Coect laelin& % C

O9ect "i#tance > %

4i&'t a ,at' !it'

coect "iection.


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(c)

1. Diamond has higher refractive index than glass.2. The critical angle of diamond is much smaller than the critical angle of glass.

3. Most of the rays that entered diamond will be total internally reflected thatmakes diamond sparkles.

. Mo#t o% t'e a# t'at entee" &la## !ill e e%acte" ut not

e=ecte". T'ee%oe &la## le## #,a$le# co*,ae to "ia*on".

#u&&e#tion e,lanation T'e e%acti+e in"e o% oute

lae i# le## t'an t'e e%acti+e

in"e o% inne lae.

T'e total intenal e=ection

occu in t'e ?e o,tic.

@#e 'i&' =eiilit *ateial Can ea#il en" at t'e cu+e

,at@#e #ton& *ateial Not ea#il ea$

@#e t'in *ateial Can e in#et in #*all #,aceaea

4o! "en#it *ateial 4i&'te not 'ea+ to caBuil" un"le o% o,tical ?e Ca *oe in%o*ation

Section D

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Ans11 (Repaired)