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ICSE Board Exam 2018 : Chemistry FIRST

8 pages, 82 questions, 82 questions with responses, 243 total responses,

Rachit Katiyar
Sheiling House School, Kanpur Nagar
1st to 10th Science

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f he a t o n a lu m a d d e d t m o le c u le s w rm h y d r a te d o re lp h u ric ox c h a in s o a n e u tr a l id e is hic h a re n o ga se o m t in io n ic f id e n tic a l a to n s a lts , f c r y s ta lliz a tio n lp h id e su is [5 ] e n ts y c h a r g e d io n g a tiv e b a la n c e d c }le m ic a l e q u a tio n fo r Li) is e le c tr o n c e r ta in hic h h ic h an om f io n s f lo s e th e ir p ro c e s s by he n w e le m e n f an (iv ) T h e r ite a tP fo r th e fo llo w in g s ta te m se tio n o te n d e n c y o W o n ta c p e n to x id e (iii) T h e (v ) T h e e g a n e s e d io x id e e n e rgy p ro c e s s is th a n e is o la te d a to m to fo m (ii) e th y l e th e r f d im m e th a n e y ly s t u o n e w o r T he (i) e o n an y tio n IU p C x o an w d s h e n le ft c ru m s ta te ex p o s e d to b le in to p o w d e r c o n c e n tr a te d each o 5 f th e fo llo w in g a c id o n c a r b o n s o lu o n w itfi ir o n \ I) c hlo r id e in u m h y d r o x id e Scanned by i h y d r o c h lo r c (ii) (e ) - o n e r e le v a n t o S ta te L CH C ead n itr a te on m a gn e s iu m su lp h it e 3 fo r m u la o r ite th e s tn c tu r a w (i) C H 3C id H H 3 ac b s e r v a tio n fo f th e tw r eac is tr e a te d s o lu tio n w h o ith o is o m e rs o f b u ta n e f th e fo llo w in g so d iu m h y d r o x id e s o lu tio n dr o p w is e till it is in e x c e s s A t th e a n o e c tr o e ( iii) L e a d A (v ) B a r iu G iv e itr a te m c io n ic (ii) In (v ) lte n le a d b r o m id e is m o s c a lc iu m Is c s o lu each o e rt ga se s do ix e d m e le c tr o ly z e d o r ic ith d ilt te h y d r o c h ex po se d to a ir u s in g g r a p h ite fo r s o n e ac id m an d h e a te d e . is s lo w ly a d d e d io tio n so d iu m su p h a te s o lu t io n f th e jEo llo w in g n o t fo r m a M gh go o d m e ltin g p o in t io n s p o te n tia l in c r e e ta ls a r e w h lo r id e is po m ds ha v e co m lk a lim s o lu tio n fo r (iii) lo n is a tio n (iv ) A hen h lo r id e a re a so n (i) w de s hydro u (iv ) n n de , a s e r e d u c in o d , fr o m le ft to g h t g a g e n ts C o n d u c tiv ity o f dilu te h y d ro c h lo r ic a c id is g re a te r th a n th a t o f a c e tic ac 3 Scanned by SUlpht is o x A c er o tio n o f c o ld a n d d ilu te n itr ic a c id o n c p p (v ) R e ac n o f e th a n o lan d o ith th e w E le c tr o ly s is o f a at hydro g e n ry d is p la c e m (iv ) T h e T he to h lo r id e o n o re o sa lt p r e p a r e d b y th e w a te r u n po d s do [5 in b r a c k ts en t con du c t h lo r id e so n o e le c tr ic ity in th e ir d iu so f ir o m e c e can rd / p w co a ra lle c te d m ill fo rm l) by Fc a la th o d o e ta w ) is n lu ti n (h y d r o g e n g a s / s o d iu m ga s n w a m f d ir e c t c o b ir a tio m m n e / ha em a tite ) is n i) c h o S E C T IO N II (4 0 M r lp h id e f a c id ifie d o h o ic e g iv th e c a th o e f a ir (d o w m ly s is su m m eo u s qu o st c o m lir o n en c so o n (ti s e d / s o id ) m d iu c o rre c t c s t a (iii) D so e le c tr o v a le n t c o m F ac e le c tr o d e d t r in g th e an o tio io n ic d iu tio n o f d ilu te h y d r o c h lo r ic A t th e (ii) id c (iv ) (i) tr a te d n itr ic a c id c o n ce n A F ill u p th e b la n k s (h ) id iz e d b y : A tte t : y lo a n qu r a r fr o m e s tio n s k s) th is S e c tio n . Q u e s tio n (a ) (b ) ' 2 gg (U W n at do y o u O i) D ra w th e e le c tro n n P e r io O n co m d 3 o fth e u n r s ta n d by a lo n d o t d ia g ra m o e [3 p a ir o f e le c tro n s ? fH y a n iu m io n . (H - 1; 0 = 8) P e r io d ic T a th e b a s is o f th is n fo rm a tio n p le te th e fo lo w in g s ta te m , c h o o se c o rr e c t w o r m th e b r a c k e ts to e n ts (i) T he e le m e n t B w o u ld h a v e d o (in T he e le m e n tA w o u th e w er /\ ld p r o b a b ly h a v e er ) m e ta (Ze s s e r / i llic c h a r a c te r th a n A er ) e le c tr o n a flin ity th a n B w ou ld h a v e (g r e a te r / s m a t / ze r ) Scanned by C o py to n Q u est o n d an e u tr a co m p le te th e fo llo W te th e b a la n (ii) S ta te (iii) W n (i) N am (ii) hy w y is r Q o n m th e a id la b o r a to r y W n W r ite c ce r s to th e re c o n v e r s io n o f io n s su r n re en r ite th e ) ac l e c te d d c to n is p re p a re ' " id n o , a m i to n ' . t u s e d fo r ' .' d r y in g ia g a s in th e " ; am m o n . i g a s o v e r w a te r ? ac hy dro ge n id p r e fe r r e d to h e m ic a l e q u a tio re a c o c ac n fo c h lo r id e g a s in th e th e r o th e la b o r id in th e la b o f h y d ro g e n t is d o n e to d is s o lv fin in g (ii) W ' d th e p r e p a r a tio n o f y is d ir e c t a b s o r p tio n e le c tr o ' lp h u c n o t co d fo q u a tio ac r a to r y id s ? H y " L , p r e p a r a tio n f h lo r id e g a s n a t is th e c a th o o de e c h lo r a to r y [2 ] d e g a s in h y dro ge n c w a te r n o t fe a s ib le ? h lo d e g a s in w a te r ? f co pper: m d e u p [2 ] o f? tio n th a t ta k e s p la c e a t th e a n o d e 4 T h e p e r c e n ta e g N itr o g e n 8 2 3 5 % F in d th e T 18 5 2 2 lk a li an a d e y is th is p a r tic u la r (i) W (a ) g t s e ic a l che m ia g a s b a la n th e W D a t a rra n g e m F o r th e u e s tio n d th e p r e p a r a tio n o f h y d r o c h lo (i) W O i) u s in c e ce c o n c e n tr a te am h y dr o g e n Fo h ic h l p a r tic le la b o r a to r y b y w 3 (i) in g ta b e w em co m , p o s itio n o f a g a s is : [2 ] H y d r o g e n 17 6 4 % p ir ic a l fo r m u la o f th e g a s IN 5 = 14 , H = l] T u rn O v er Scanned by u c a r b id e r e a c ts w A lu m in (b ) 3 + (i) M h a t m a ss c a r b id e O i) W na t w f in a lu m lu m e o f in g e q u a tio n 4 d fro m 12 g o f a lu m in u m b ta in e d fr o m 12 g o f a lu m in u m h y d r o x id e is fo um w e rm at s is tp o ' ? m le c u la r o cc o f ga s A gases A e 3C H + m e th a n e w e an ig h t o f A 14 C c o n ta in s ill b e p r e s e n t in 7 5 th g to th e fo llo rd in w a te r a G c a \ R e la tiv e If 1 5 0 o ? v o c a r b id e (i) 03 4A I( 12 H 2 0 A 14 C ith d B x cc o fB ? are u n m o - 3 14 4 A I(O H le c u le s , h o d e r th e sam e a bo v e p r o b le m w co n )3 m an d itio n y 7 8] - m s o o le c u le s o f gas B f te m p e r a tu r e an [2 ] d p re s s u r e N am N e tl e m a in c o m p o n e n t o (i) B ra s s ( O i) D u r a lu m in (d ) Q J u e s tio n (a ) h ic h th e O i) c am la w L o n w f th e fo llo w in g llo y s ! t\ p le te th e fo llo , w in g ta b le w h ic h r e la te s 3 T 18 522 a is b a s e d 5 om ' " e th e to th e ho m o lo go u s s e r ie o f [ ] 6 Scanned by Scanned by Scanned by

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