Karnataka CET- 2014(Chemistry)

Question 1 of 45

1. Question

25 cm³ of oxalic acid completely neutralized 0.064 g of sodium hydroxide. Molarity of the oxalic acid solution is

0.045
0.032
0.064
0.015

Question 2 of 45

2. Question

The statement that is Not correct is

Energies of stationary states in hydrogen like atoms is inversely proportional to the square of the principal quantum number
The radius of the first orbit of He⁺ is half that of the firstorbit of hydrogen atom
Angular quantum number signifies the shape of the orbital
Total number of nodes for 3s orbital is three

Question 3 of 45

3. Question

For the equilibrium:

CaCO_3(s) ⇌ CaO_(s) + CO_2(g); K_p = 1.64 atm at 1000 K
50 g of CaCO₃ in a 10 litre closed vessel is heated to 1000 K. Percentage of CaCO₃ that remains unreacted at equilibrium is
(Given R = 0.082 L atm K^-1 mol^-1)

50
20
40
60

Question 4 of 45

4. Question

Conversion of oxygen into ozone is non-spontaneous at

High temperature
Low temperature
All temperatures
Room temperature

Question 5 of 45

5. Question

Density of carbon monoxide is maximum at

0.5 atm and 273 K
4 atm and 500 K
2 atm and 600 K
6 atm and 1092 K

Question 6 of 45

6. Question

The acid strength of active methylene group in

CH₃COCH₂COOC₂H₅
CH₃COCH₂COCH₃
C₂H₅OOCCH₂COOC₂H₅ decreases as

a > b > c
c > a > b
a > c > b
b > a > c

Question 7 of 45

7. Question

A metallic oxide reacts with water to from its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be

Na₂O₂
CaO
Li₂O

Question 8 of 45

8. Question

Gold Sol is not

A lyophobic colloid
Negatively charged colloid
A macro molecular colloid
A multimolecular colloid

Question 9 of 45

9. Question

For an ideal binary liquid mixture

∆H_(mix) = 0; ∆S_(mix) < 0
∆S_(mix) > 0; ∆G_(mix) < 0
∆S_(mix) = 0; ∆G_(mix) = 0
∆V_(mix) = 0; ∆G_(mix) > 0

Question 10 of 45

10. Question

For hydrogen – oxygen fuel cell at one atm and 298 K

H_2(g) + 1/2 O_2(g) ⟶ H₂O_(l); ∆G˚ = − 240 kJ

E˚ for the cell is approximately,
(Given F = 96.500 C)

1.24 V
1.26 V
2.48 V
2.5 V

Question 11 of 45

11. Question

Which one of these is not known?

CuI₂
CuBr₂
CuCl₂
CuF₂

Question 12 of 45

12. Question

The correct statement is

The extent of actinoid contraction is almost the same as lanthanoid contraction
Ce⁺⁴ in aqueous solution is not known
The earlier members of lanthanoid series resemble calcium in their chemical properties
In general, lanthanoids and actinoids do not show variable oxidation states

Question 13 of 45

13. Question

0.44 g of a monohydric alcohol when added to methylmagnesium iodide in ether liberates at S.T.P., 112 cm³ of methane. With PCC the same alcohol forms a carbonyl compound that answers silver mirror test. The monohydric alcohol is

(CH₃)₃C – CH₂OH
(CH₃)₂CH – CH₂OH
CH₃ – CH(OH) – CH₂ – CH₃
CH₃ – CH(OH) – CH₂ – CH₂ – CH₃

Question 14 of 45

14. Question

For Freundlich isotherm a graph of log⁡ (x/m) is plotted against log P. The slope of the line and its y-axis intercept, respectively corresponds to

log(1/n), k
log(1/n), log k
(1/n), k
(1/n), log k

Question 15 of 45

15. Question

The IUPAC name of the complex ion formed when gold dissolves in aquaregia is

Tetrachloridoaurate (I)
Dichloridoaurate (III)
Tetrachloridoaurate (III)
Tetrachloridoaurate (II)

Question 16 of 45

16. Question

The correct sequence of reactions to be preformed to convert benzene into m-bromoaniline is

Bromination, nitration, reduction
Reduction, nitration, bromination
Nitration, reduction, bromination
Nitration, bromination, reduction

Question 17 of 45

17. Question

A_(g) → P_(g) + Q_(g) + R_(g), follows first order kinetics with a half life of 69.3 s at 500˚C. Starting from the gas ‘A’ enclosed in a container at 500˚C and at a pressure of 0.4 atm, the total pressure of the system after 230 s will be

1.32 atm
1.12 atm
1.15 atm
1.22 atm

Question 18 of 45

18. Question

MnO₂ + HCl ⟶ A_(g)
A_(g) + F_2(excess) ⟶ B_(g) (@573K temperature)
B_(l) + U_(s) ⟶ C_(g) + D_(g)

The gasses A, B, C and D are respectively

Cl₂, ClF₃, UF₆, ClF
O_2,O₂F₂, U₂O₃, OF₂
CL₂, ClF, UF₆, ClF₃
O₂, OF₂, U₂O₃, O₂F₂

Question 19 of 45

19. Question

Acetophenone cannot be prepared easily starting from

C₆H₅CH₃
C₆H₆
C₆H₅CH(OH)CH₃
C₆H₅C ≡ CH

Question 20 of 45

20. Question

5.5 mg of nitrogen gas dissolves in 180 g of water at 273 K and one atm pressure due to nitrogen gas. The mole fraction of nitrogen is 180 g of water at 5 atm nitrogen pressure is approximately

1 × 10^-5
1 × 10^-4
1 × 10^-6
1 × 10^-3

Question 21 of 45

21. Question

50 cm³ of 0.04 M K₂Cr₂O₇ in acidic medium oxidizes a sample of H₂S gas to sulphur. Volume of 0.03 M KMnO₄ required to oxidize the same amount of H₂S gas to sulphur, in acidic medium is

80 cm³
120 cm³
60 cm³
90 cm³

Question 22 of 45

22. Question

Conductivity of a saturated solution of a sparingly soluble salt AB at 298 K is 1.85 × 10^-5 S m^-1. Solubility product of the salt AB at 298 K is

Given ∧_m^∘ (AB) = 140 × 10^-4 S m² mol^-1

1.32 × 10^-12
1.74 × 10^-12
5.7 × 10^-12
7.5 × 10^-12

Question 23 of 45

23. Question

An incorrect statement with respect to S_N1 and S_N2 mechanisms for alkyl halide is

Competing reaction for an S_N2 reaction is rearrangement
A weak nucleophile and a protic solvent increases the rate of favours S_N1 reaction
A strong nucleophile in an aprotic solvent increases the rate of favours S_N2 reeaction
S_N1 reactions can be catalyzed by some Lewis acids

Question 24 of 45

24. Question

Butylated hydroxyl toluene as a food additive acts as

Flavouring agent
Emulsifier
Antioxidant
Colouring agent

Question 25 of 45

25. Question

Terylene is NOT a

Polyester fibre
Step growth polymer
Copolymer
Chain growth polymer

Question 26 of 45

26. Question

The correct statement is

One mole each of benzene and hydrogen when reacted gives 1/3 mole of cyclohexane and 2/3 mole unreacted hydrogen
It is easier to hydrogenate benzene when compared to cyclohexene
Cyclohexadiene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene
Hydrogenation of benzene to cyclohexane is an endothermic process

Question 27 of 45

27. Question

From the elements from atomic number 1 to 36, he number of elements which have an unpaired electron in their s subshell is

7
9
4
6

Question 28 of 45

28. Question

The statement that is NOT correct is

Van der Waals constant ‘a’ measures extent of intermolecular attractive forces for real gases
Boyle point depends on the nature of real gas
Compressibility factor measures the deviation of real gas from ideal behavior
Critical temperature is the lowest temperature at which liquefaction of a gas first occurs

Question 29 of 45

29. Question

The correct arrangement for the ions in the increasing order of their radii is

Ca⁺², K⁺, S^-2
Cl^-, F^-, S^-2
Na⁺, Cl^-, Ca⁺²
Na⁺, Al⁺³, Be⁺²

Question 30 of 45

30. Question

The correct arrangement of the species in the decreasing order of the bond length between carbon and oxygen in them is

CO₂, HCO₂^-, CO, CO₃^-2
CO, CO₃^-2, CO₂, HCO₂^-
CO, CO₂, HCO₂^-, CO₃^-2
CO₃^-2, HCO₂^-, CO₂, CO

Question 31 of 45

31. Question

The species that is not hydrolysed in water is

BaO₂
CaC₂
P₄O₁₀
Mg₃N₂

Question 32 of 45

32. Question

For the properties mentioned, the correct trend for the different species is in

Inert pair effect – Al > Ga > In
First ionization enthalpy – B > Al > Tl
Strength as Lewis acid – BCl₃ > AlCl₃ > GaCl₃
Oxidizing property – Al⁺³ > In ⁺³ > Tl ⁺³

Question 33 of 45

33. Question

A correct statement is

[Ni(NH₃)₆]⁺² is an inner orbital complex
[Co(NH₃)₆]⁺² is paramagnetic
[CoBr₂(en)₂]^- exhibits linkage isomerism

Question 34 of 45

34. Question

Idoform reaction is answered by all, except

CH₃CHO
CH₃ – CH₂ – CH₂OH
CH₃ – CH(OH) – CH₂ – COOH
CH₃ – CH₂ – OH

Question 35 of 45

35. Question

A crystalline solid XY₃, has ccp arrangement for its element Y. X occupies

33% of tetrahedral voids
33% of octahedral voids
66% of tetrahedral voids
66% of octahedral voids

Question 36 of 45

36. Question

The statement that is NOT correct is

Carbohydrates are optically active
Lactose has glycosidic linkage between C₄ of glucose and C₁ of galactose unit
Aldose or ketose sugars in alkaline medium do not isomerise
Penta acetate of glucose does not react with hydroxylamine

Question 37 of 45

37. Question

Match the reactant in Column – I with the reaction in Column – II

	Column – I		Column – II
I	Acetic acid	a	Stephen
II	Sodium phenate	b	Friedel-Crafts
III	Methyl cyanide	c	HVZ
IV	Toluene	d	Kolbe’s

I – d, II – b, III – c, IV – a
I – c, II – d, III – a, IV – b
I – c, II – a, III – d, IV – b
I – b, II – c, III – a, IV – d

Question 38 of 45

38. Question

The statement that is NOT correct is

In solid state PCl₅ exists as [PCl₄]⁺[PCl₆]^-
Phosphorous acid on heating disproportionate to give metaphosphoric acid and phosphine
Hypophosphorous acid reduces silver nitrate to silver
Pure phosphine is non-inflammable

Question 39 of 45

39. Question

In which one of the pairs of ion given, there is an ion hat forms a co-ordination compound with both aqueous sodium hydroxide and ammonia and another ion that forms a co-ordination compound only with aqueous sodium hydroxide?

Zn⁺², Al⁺³
Al⁺³, Cu⁺²
Pb⁺², Cu⁺²
Cu⁺², Zn⁺²

Question 40 of 45

40. Question

A crystalline solid X reacts with dil. HCl to liberate a gas Y. Y decolourises acidifier KMnO₄. When a gas ‘Z’ is slowly passed into an aqueous solution of Y, colloidal sulphur is obtained. X and Z could be, respectively

Na₂SO₄, H₂S
Na₂SO₄, SO₂
Na₂S, SO₃
Na₂SO₃, H₂S

Question 41 of 45

41. Question

An aromatic compound ‘A’ (C₇H₉N) on reacting with NaNO₂/HCl at 0˚C forms benzyl alcohol and nitrogen gas. The number of isomers possible for the compound ‘A’ is

7
6
5
3

Question 42 of 45

42. Question

The statement that is NOT correct is

Collectors enhance the wettability of mineral particles during froth flotation
Copper from its low grade ores is extracted by hydrometallurgy
A furnace lined with Haematite is used to convert cast iron to wrought iron
In vapour phase refining, metal should form a volatile compound

Question 43 of 45

43. Question

Volume occupied by single CsCl ion pair in a crystal is 7.014 × 10^-23 cm³. The smallest Cs – Cs internuclear distance is equal to length of the side of the cube corresponding to volume of one CsCl ion pair. The smallest Cs to Cs internuclear distance is nearly

4.3 Å
4.5 Å
4.4 Å
4 Å

Question 44 of 45

44. Question

For Cr₂O^-2₇ + 14H⁺ + 6e^– → 2Cr⁺³ + 7H₂O; E˚ = 1.33 V At [Cr₂O^-2₇] = 4.5 millimole, [Cr⁺³] = 15 millimole, E is 1.067 V. The pH of the solution is nearly equal to

3
4
2
5

Question 45 of 45

45. Question

10 g of a mixture of BaO and CaO requires 100 cm³ of 2.5 M HCl to react completely. The percentage of calcium oxide in the mixture is approximately
(Given: molar mass of BaO = 153)

55.1
47.4
52.6
44.9

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