aieee achiever 1

8/2/2019 Aieee Achiever 1

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CHEMISTRY CREST AIEEE ACHIEVER 1

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Maximum Marks: 120

Question paper format and Marking scheme:

1. This question paper has 30 questions of equal weight age. Each question is allotted 4(four) marks for eachcorrect response.

2. (one fourth) of total marks allotted to each question i.e., 1 mark will be deducted for indicating incorrect

response

3. No deduction from the total score will be made if no response is indicated for an item in the answer sheet.

4. There is only one correct response for each question. Filling up more than one response in each questionwill be treated as wrong response and marks for wrong response will be deducted accordingly.


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1. A solution containing 0.1g of a non-volatile organic substance P (molecular mass 100) in 100 g of

benzene raises the boiling point of benzene by 0.20C, while a solution containing 0.1 g of another

non-volatile substance Q in the same amount of benzene raises the boiling point of benzene by 0.40C. What is the ratio of molecular masses of P and Q(1) 1 : 2 (2) 2 : 1

(3) 1 : 4 (4) 4 : 1

2. The correct order of rates of nitration in the following isD

D

D

D

D

D

NO2 Cl

I II III IV V

1) II < III < I < IV < V 2) IV < V < I = III < II3) IV < I = III < V < II 4) I < III < II < V < IV

3. Consider the following molecular structures of [Pt(NO2)(Py)(NH3) (NH2OH)]+

O2N NH2OH

PyH3N

Pt

I II III IV

O2N Py

NH3HOH2N

Pt

O2N Py

NH2OHH3N

Pt

O2N NH3

NH2OHPy

Pt

+ + + +

Choose the incorrect statement among the following(1) I,II and III are geometrical isomers (2) III and IV are identical structures

(3) I ,II and III are diastereoisomers (4) II and IV are enantiomeric pair

4. In a fossil 97.56% of initial concentration of C-14 was present when analyzed in the year 2004.

The fossil is likely to originate in which of the following battle. (t1/2 for C-14 is 5760 year; use log

12.5/12.195 = 0.01072)

(1) Battle of Kalinga 361 BC which turned emperor Ashoka towards Buddhism(2) Ist battle of Panipat 1526, Babar defeats Ibrahim Lodi

(3) IInd battle of Panipat 1556, Akabar defeats Hemu .

(4) Battle of Pyramids 1798, Napoleon defeats Mamelkus in Egypt

5. on reaction with NBS in CCl4 gives the major product

(1) (2) (3) (4)

Br

CHBr

Br

CH2Br


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6. Most powerful reducing agent among the following is;

1) Pyrophosphoric acid 2) Hypophosphoric acid

3) Hypophosphorous acid 4) Orthophosphorous acid

7.

For the formation of phosgene from CO(g) and chlorine (g) as ,

2 2CO g Cl g COCl g( ) ( ) ( )+ + + + the possible mechanism is

2 2Cl Cl (fast) Cl CO COCl++++ (fast)

COCl+ Cl2 COCl2 + Cl (slow)

The rate law expression can be written as

(1) Rate = k [CO] [Cl2] (2) Rate = k [CO]1/2

[Cl2]

(3) Rate = k [CO] [Cl2]3/2 (4) Rate = k [CO] [Cl2]

1/2

.

8. Glucose on reduction with Na/Hg and water gives ?

(1) Sorbitol (2) Fructose (3) Saccharic acid (4) Gluconic acid

9. The decreasing order of second ionisation enthalpy of Mg, Al, Si is

(1) Mg > Al > Si (2) Al > Si > Mg

(3) Si > Al > Mg (4) Si > Mg > Al.

10. Two elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of former

weighs 10 grams while 0.05 moles of the latter weighs 9grams. Then the weight of 0.2 moles of

X2Y is

(1) 11 grams (2) 22 grams (3) 2.2 grams (4) 1.1 grams

11. Which is incorrect product(1)

3Na/ Liq.NH

3 3CH C C CH C C

CH3

H

CH3

H(cis)

(2)2

4

H

3 3 Pd/BaSOCH C C CH C C

CH3

H

CH3

H(cis)

(3)

2Br

cis-But-2-ene

CH3H

H CH3

CH3

H Br

Br H

CH3

+

CH3

Br H

H Br

CH3

-2, 3-Dibromobutane( )


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(4)

2Br

trans-But-2-ene

CH3H

CH3 H

CH3

H Br

H Br

CH3

Meso -2, 3-dibromobutane

12. Which of the following pairs have same hybridization about the central atom?

(1) SF4/SiF4 (2) 3 3NO / NF

(3) 2 22 8 2 3S O / S O

(4)5 7

BrF / IF

13. Coagulation values of the electrolytes 3AlCl and NaCl for 2 3As S solution are 0.093 and 52respectively. How many times nearly 3AlCl has greater coagulating power than NaCl ?

(1) 930 (2) 520 (3) 560 (4) 1000

14. The treatment of benzene with isobutene in the presence of sulphuric acid gives :

(1) isobutyl benzene (2) tert-butyl benzene(3) n-butyl benzene (4) no reaction

15. The wrong statement about N2O is :(1) It is nitrous oxide (2) It is least reactive oxide of nitrogen

(3) It is not a linear molecule (4) It is known as laughing gas

16. n containers having volumes v, 2v, 3v..nv containing gaseous moles n, 4n, 9n,..n3

respectively are connected with stopcock at same temperature. If pressure of first container is P,

then the final pressure when all the stopcocks are opened is

(1)( )n 2n 1 P

3

+(2)

( )2n 1 P

3n

+

(3)( )2n 1 P

6n

+(4)

( )2n 1 P

3

+

17.

NO2

OH

Cl

OH

Me

OH

OMe

OH OH

( I ) (II) (III) (IV) (V)


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Correct order of Acidic strength is

(1) I > II > III > IV > V (2) I > II > V > III > IV

(3) I > II > III > V > IV (4) I > II > V >IV > III

18. In electrolysis of Al2O3 byHall-Heroult process:

(1) cryolite Na3[AlF6] lowers the melting point of Al2O3 and increases its electricalconductivity.

(2)Al is obtained at cathode and probably CO2 at anode

(3) both (1) and (2) are correct.(4) none of the above is correct.

19. At equilibrium( ) ( )2 4 2

2g g

N O NO the observed molecular weight of 2 4N O is180g mol at 350K.

The percentage dissociation of 2 4N O (g) at 350 K is :

1) 10% 2) 15% 3) 20% 4) 18%

20. Arrange following in order of reactivity toward SN1

reaction

(I) (II) (III) (IV)

Cl ClCl

Cl

(1) I > II > III > IV (2) IV > I > II > III

(3) IV > II > I > III (4) IV > III > II > I

21. The following acids have been arranged in order of decreasing acid strength. Identify the correct

order.

ClOH (), BrOH (), IOH ()

(1) > > (2) > > (3) > > (4) > >

22. Electrolysis of an acetate solution produces ethane according to the Kolbe reaction :

3 2 6 22 2 2CH COO C H CO e + +

What volume of ethane is produced at 270C and 740 mm Hg, if a current of 0.500 A were passed

through the solution for 7 h and the electrode reaction is 82% efficient?

(1) 2.70 L (2) 5.4 L (3) 1.35L (4) 0.65 L

23. Which of the following compound gives N-nitrosoamine on reaction with nitrous acid

(1) CH2 NH2

(2)NH2H3C

(3) N

(4) CH3NH


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24. Which of the following ore can be concentrated by froth floatation process :

(1) Epsom (2) Silver glance (3) Haematite (4)All

25. The enthalpy of neutralization of a weak monoprotic acid, HA in 1 M solution with a strong base

is

-55.95 kJ/mol. If the unionized acid requires 1.4 kJ/mol heat for its complete ionization and

enthalpy of neutralization of the strong monobasic acid with a strong monoacidic base is -57.3

kJ/mol. Then % ionization of the weak acid in molar solution is

(1) 1.2 % (2) 3.57 % (3) 6.07 % (4) 12.01 %

26. Which will not perform iodoform reaction?

(1) CH3COCH2CH3 (2) CH3CONH2 (3) C6H5COCH3 (4) CH3CHO

27. Which of the following species will paramagnetic in nature, ifHund's rule is violated

while writing their molecular orbital configuration :(1) O2 (2) C2 (3) B2 (4) N2

---

.

28. Calcium lactate is a salt of weak acid i.e., lactic acid having general formula ( )2Ca Lac . Aqueous

solution of salt has 0.3 M concentration. pOH of solution is 5.60. If 90 % of the salt is dissociated

then what will be the value of apK ?

(1) ( )2.8 log 0.54 (2) ( )2.8 log 0.54+ (3) ( )2.8 log 0.57+ (4) None of these

29. Identify the reagent in the following reaction

(1) Conc. HCl (2) HCl , ZnCl2 (3) SOCl2 (4) Aqueous KOH

30. The ion that cannot be precipitated by both HCl and H2S is(1) Pb

2+(2) Cu

+(3) Ag

+(4) Sn

2+

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