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Eamcet 2014 Engineering Key Solutions AndhracollegesRatings: (0)|Views: 142|Likes: 0
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Eamcet 2014 Engineering Key Solutions Andhracolleges
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2 2 M a y 2 0 1 4 E A M C E T 2 0 1 4 - E N G I N E E R I N G
1
P A P E R ( C O D E -A ) 38
136.Which one of the following correctly represents the variation of electronegativity (EN) withatomic
number (Z) of group 13 elements ?
(1) (2) (3) (4)
Key: 3Sol:
Conceptual
137.Which one of the following elements reacts with steam ?
( 1 ) t e t r a h e d r a l a n d t r i g o n a l p l a n a r ( 2 ) l i n e a r a n d t e t r a h e d r a l ( 3 ) t r i g o n a l p l a n a r a n d l i n e a r ( 4 ) s q u a r e p l a n a r a n d l i n e a r
De carboxilation in presence of sodalime
141.Which one of the following gives sooty flame on combustion ?
(1) 4
C H ( 2 )
2 2 M a y 2 0 1 4 E A M C E T 2 0 1 4 - E N G I N E E R I N G P A P E R ( C O D E -A ) 39
142.Which one of the following elements on doping with
0 0 × × R T =× × R T M 1 00 3 4 2 1 0 0
M=68.4
144.Vapour pressure in mm Hg of 0.1 mole of urea in 180 g of water at 0
concentration of the reactant decreases from 0.6 M to 0.3 M in 15minutes. The time taken for the concentration to change from
0.1M
to
147.Assertion (A) : Van der Waals’ are responsible for chemisorptionReason (R) : High temperature is
favourable for chemisorptionThe correct answer is
(1) (A) and (R) are correct and (R) is the correct explanation of (A)(2) (A) and (R) are correct but (R) is not the correct
explanation of (A)(3) (A) is correct but (R) is not correct(4) (A) is not correct but (R) is correctwww.AndhraColleges.com - Eamcet Rank Estimator - Mock Counselling - Cutoff Ranks
2 2 M a y 2 0 1 4 E A M C E T 2 0 1 4 - E N G I N E E R I N G P A P E R ( C O D E -A ) 40
Key: 4Sol:
Conceptual
148.What is the role of limestone during the extraction of iron from haematite ore ?
( 1 ) o x i d i z i n g a g e n t ( 2 ) r e d u c i n g a g e n t ( 3 )
when treated with concentrated 24
H S O .
What is the type of reaction involved in it ?
( 1 ) H y d r o l y s i s
r e a c t i o n ( 2 ) A d d i t i o n r e a c t i o n ( 3 ) D i s p r o p o r t i o n a ti o n r e a c t i o n ( 4 ) D e h y d r a t i o n r e a c t i o n
Key: 4Sol:
Conceptual
150.The structure of 4
XeOF
is
( 1 ) S q u a r e p l a n a r ( 2 ) S q u a r e p y r a m i d a l ( 3 ) P y r a m i d a l ( 4 )
151.Which one of the following ions has same number of unpaired electrons as those present in 3+
V
ion ?
(1)
Key: 2Sol:
Conceptualwww.AndhraColleges.com - Eamcet Rank Estimator - Mock Counselling - Cutoff Ranks
Key: 4Sol:
Conceptual
154.Lactose is a disaccharide of ________
1)
D G l u c o s e a n d DG a l a c t o s e
chemical messengers?
1 ) A n t a g o n i s t s2 ) A g o n i s t s 3 ) R e c e p t o r s 4 ) A n t i b i o t i c s
Key: 2Sol:
2 2 7 2 4
NaCrO/HSO2) 2 2 7 2 4
NaCrO/HSO3) Zn4) Znwww.AndhraColleges.com - Eamcet Rank Estimator - Mock Counselling - Cutoff Ranks
2 2 M a y 2 0 1 4 E A M C E T 2 0 1 4 - E N G I N E E R I N G P A P E R ( C O D E -A ) 42
Key: 1Sol:
OH O2 5 7 2 4
Identify Z from the following:
1 ) A c e t i c a c i d 2 ) P r o p a n i c a c i d 3 ) M e t h y l a c e t a t e 4 ) E t h y l a c e t a t e
Key: 1Sol:
160.What is Z in the following reaction sequence?652
23223
i ) N a N O H C l / 2 7 3 K i i ) H P O H O iii)CO,HCl;anhydrousAlCl/CuCl
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