PAPER : MODEL QUESTION PAPER -AIEEE-2008

 

1.Compres1sibility factor for real gas at moderately low pressure can be expressed as

a)PV/RT b)1+ b)P/RT c)1- a/RTV d)none of these

2. For the equilibrium system

SO₂Cl₂ + HEAT ↔ SO₂ + Cl₂ , if some amount of chlorine is added to the equilibrium mixture at constant volume , the temp. of the system will

a)decrease b)increase c)remains unaltered d)first increases and then decreases

3. The saturated pot. Nitrate solution is used to make salt bridges because

a) velocity of K+ is greater than NO3- b) velocity of NO ^3- is greater than K⁺

c) velocity of K⁺ and NO^3- is nearly same d) pot. Nitrate is highly soluble in water

4. which of the fallowing carbohydrate is a polysaccharide? a)sucrose b)lactose c)maltose d)starch

5.The final step for the extraction of copper from copper pyrites in Bessemerer converter involves the reaction

a)4Cu₂O+ FeS--->8 Cu +FeSO₄ b)Cu₂S+2Cu₂O ----->6 Cu + SO₂

c) 2Cu₂O + FeS ---->4Cu +SO₂+ Fe d) Cu₂S+2 FeO ---->2Cu+ 2 FeCO + SO₂

6. In nitroprusside ion the iron and NO exist as Fe²⁺ and NO⁺ rather than Fe³⁺ and NO these forms can be differentiated by

a)estimating the conc. Of iron b)measuring the conc. Of CN^- ion

c)measuring the solid state magnetic moment d)thermally decomposing the compound

7. On mixing tetraethyl lead to gasoline available at petrol pump,

a)calorific value of fuel increases b)odour diminishes

c)less smoke is obtained on combustion d)antiknock property of fuel increases

8.which of the fallowing is an ex. For condensation polymer

a)polythene b)pvc c)terylene d)none

9. match the list I with list II and select the correct answer using the codes given below the list

	List I		List II
1	Heavy water	A	Bicarbonates of Mg and Ca in water
2	Temporary hard water	B	No foreign ions in water
3	Soft water	C	D2O
4	Permanent hard water	d	Sulphates and chlorides of Mg and Ca in water

a)1-C,2-D,3-B,4-A b)1-B,2-A, 3-C, 4-D c)1-B, 2-D, 3-C, 4-A d) 1-C, 2-A, 3-B, 4-D

Zn-HEAT CONC. HNO₃+H₂SO₄  

10. PHENOL-------> A ----------------> B

A and B are a)benzene and nitrobenzene b) benzene and dinitrobenzene

c)toluene and m- nitrobenzene d)any of these

11. The most appropriate reagent to distinguish between formaldehyde and acetaldehyde is a)fehlings solution b) tollens reagent c)schiffs reagent d)iodine in presence of base

12. N₂+ O₂ <----> 2NO –Q J

For the above reaction , which of the fallowing is the essential condition for the higher production of NO

a)high temp. b)high pressure c)low temp. d)low pressure

13.The bonds in K₄ [ Fe(CN)₆ ] are

a)all ionic b)all covalent c)ionic and covalent d) ionic, covalent and coordinate covalent

14. for which of the fallowing sets of quantum no. an electron will have the highest energy?

	n	l	m	s
A	3	2	1	+1/2
B	4	2	1	+1/2
C	4	1	0	-1/2
d	5	0	0	-1/2

15. which of the fallowing carbohydrate on hydrolysis gives two molecules of D- glucose

a)sucrose b)lactose c)maltose d)starch

16. If n₁ is the no. of moles of solvent , and n₂ is the no. of moles of solute, P₀-vapour pressure of pure solvent and P_s vapour pressure of solution then which of the fallowing correctly sujjests Raoults law?

a)P_O –P_s/P_s = n₁/ n₁+n_{2 b)} P_O –P_s/P_O = n₁/ n₁+n₂

c) P_O –P_s/P_s = n₂/ n₁+n₂ d) P_O –P_s/P_O = n₂/ n₁+n₂ 

17. Which of the fallowing is not an example for negative deaviation ?

a)acetone + benzene b)chloroform + acetone c)HCl + water d)acetic acid + pyridine

18. In which of the fallowing extraction is hydrometallurgical method employed?

a)lead from galena b)copper from copper glance

c)zinc from zinc blende d)tin from cassiterite

19. Which of the fallowing statement is correct regarding the slag obtained during the extraction of iron

a)the slag is lighter and has higher melting point than the metal b) the slag is lighter and has lower melting point than the metal c) the slag is heavier and has higher melting point than the metal d) the slag is heavier and has lower melting point than the metal

20. A mixture of sand and iodine can be separated by

a)by dissolving it in water and then filtration b)fractional crystalisation

c)adding dil HCl d)sublimation

21. Which of the fallowing statement regarding noble gas is wrong?

a)they are used to provide inhert atmosphere in many chemical reactions

b)they are only sparingly soluble in water

c)they form diatomic molecule

d)they are used to fill discharge tubes used for advertising signs

22. The total entropy change for the reaction H2O(l)---> H₂( s) is x J/K/mol. The entropy of this process at various temp 272K, 273K and 274K are respectively

a)+x, 0, -x b)-x, 0, +x c)+x at all temp d)-x at all temp.

23. Which of the fallowing is incorrect about a lyophylic colloid

a) solution is highly hydrated b)solution particles usually have low viscocity

c)solution has lower surface tension d)solution is reversible in nature

24. Which of the fallowing compounds exhibits linkage isomerism?

a) [ Co (en)₃ ] Cl₃ b) [ Co (NH₃)₆ ] [ Cr (en)₃ ]

c) [ Co (en)₂ NO₂ Cl ] Br d) [ Co (NH₃)₅ Cl] Br₂

25. In zone refining method , the molton zone

a)consists of impurities only b)contains more impurity than original metal

c)contains purifide metal only d)moves to either side 

26. The rates of diffusion of oxygen and hydrogen at same pressure and temp. are in the ratio 

a)1;4 b)1:8 c)1:16 d)4:1

27. Which partical is used to bombard ₁₃ Al²⁸ to give ₁₅P³¹ and a neutron ?

a)alpha partical b)deuteron c)proton d)neutron


28. phosphate + conc. HNO₃ + (NH₄)₂ MoO_{4 solution} ---> yellow ppt.

The composition of yellow ppt is

a) (NH₄)₃ PO_4. MoO₃ b)(NH₄)₃ PO_4. 12 MoO₃

c) (NH₄)₂ PO_4. 12 MoO₃ d) NH₄ PO_4. MoO₃ 

29. stereoisomers which are neither superimposable nor mirror images to each other are called as a)enantiomers b)mesomers c)tautomers d)diastereomers

30. For preparing a buffer solution of pH 6 by mixing sodium acetate and acetic acid , the ratio of conc. Of salt and acid (Ka=10-5) should be 

a)1:10 b)10:1 c)100:1 d)1:100

31. a hypothetical reaction A2+B2 ßà 2AB, fallows the mechanism given below

A2<---> A+A (fast)

A+B2 --> AB+ B(slow)

A+B --> AB(fast)

The order of the overall reaction is a)2 b)1 c)3/2 d)zero

32. Silica gel is commonly used as a)wetting agent b)drying agent c)solvent d)catalyst

33. Formaldehyde gives an addition product with methyl meg. Iodide which on aq. Hydrolysis gives a)isopropyl alcohol b) ethyl alcohol c) methyl alcohol d) propyl alcohol

34. An ion Mn a+ where a+ is oxidation state , the magnetic moment is equal to 4.9 BM the value of a is

a)3 b)4 c) 2 d)5

35. How many optically active sterioisomers are possible for 2,3-di chloro butane

a)1 b)2 c)3 d)4

36.choose the correct matching option

	COLUMN -I		COLUMN-II
P	Standard free energy change	I	nRln(V2/V1)
Q	Enthalpy change	II	-RTlnk
R	Entropy change	III	▲E+P▲V
S	Free energy change	IV	-nFE

P Q R S

a) II III I IV

b) III IV II I

c) III II IV I

d) IV III I II

37. In a solid lattice the cation has left a lattice site in to an interstitial position . The lattice defect is known as

a)interstitial defect b)valency defect c)Frenkal defect d)Scottky defect

38. For H₃PO₃ and H₃PO₄ , the correct choice is

a) H₃PO₃ is dibasic and reducing agent b) H₃PO₄ is dibasic and non reducing agent

c) H₃PO₄ is tribasic and reducing agent d) H₃PO₄ is tribasic and non reducing agent 

39.When KCl is treated with conc. Sulphuric acid and pot. Dichromate crystals we get,

a)chromyl chloride b)chromous chloride c)chromic chloride d)chromic oxide

40. Number of moles of oxygen liberated by electrolysis of 90g of water

a)9 moles M b)4.5moels c)2.5 moles d)5 moles