Showing posts with label AIEEE. Show all posts
Showing posts with label AIEEE. Show all posts

Monday, May 16, 2011

Free Chemistry Online Practice Tests

Free Chemistry Online Practice Tests
FREE online interactive quizzes on Chemistry 10+2 level
Free Online Test Preparation: Practice tests for chemistry for PET and PMT
Free online chemistry practice test for engineering/medical entrance exams
1. Which of the following varies with change in temperature?
(a) Mole fraction
(b) Molality
(c) % (w/w)
(d) Formality
Ans. (d)
2. Which of the following is not a chalcogen?
(a) Se
(b) O
(c) S
(d) Na
Ans. (d)
3. A radioactive substance decays to 3/4 of its original value in 2h. The half-life of the substance is:
(a) 60 mm
(b) 30 mm
(c) 90 mm
(d) 15 mm
Ans. (a)
4. A compound of vanadium has a magnetic moment of 1.73 BM. What is the oxidation number of vanadium in the compound?
(a) +4
(b) +3
(c) +2
(d) +1
Ans. (a)
5. A bottle of dry ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends, the white ammonium chloride ring first formed will be:
(a) At the centre of tube
(b) Near the hydrogen chloride bottle
(c) Near the ammoni bottle
(d) Throughout the length of the tube
Ans. (b)
6. With the help of which reaction cyclohexanone is converted into cyclohexane?
(a) Wurtz-Fittig reaction -
(b) Wolff-Kishner reduction
(c) Tischenko reaction
(d) Stephen’s reaction
Ans. (b)
7. Benadryl is used as:
(a) Antiseptic
(b) Disinfectant
(c) Analgesic
(d) Antihistamine
Ans. (d)
8. Azeotropic mixture of HC1 and water has:
(a) 80% HC1
(b) 20.2% HC1
(c) 60% HC1
(d) 40.8% HC1
Ans. (b)
9. The molal freezing point constant for water is1.86°C per mol therefore, the freezing point of 0.M NaCl solution in water is expected to be:
(a) —1.86°C
(b) —0.186°C
(c) +0.372°C
(d) —0.372°C
Ans. (d)
10. The percentage by weight of hydrogen in C2H5OH is:
(a) 20 %
(b) 23.08 %
(c) 13.04%
(d) 10.15%
Ans. (c)
11. Real gas will approach the behaviour of an ideal gas at:
(a) Low temperature and low pressure
(b) High temperature and low pressure
(c) High temperature and high pressure
(d) The critical point
Ans. (b)
12. 0.45 g acid of molecular weight 90 was neutralise by 20 mL of 0.5N KOH. The basicity of the acid is:
(a) 2
(b) 4
(c) 1
(d) 3
Ans. (a)
13. Which of the following is not possible?
(a) n=2, l=1, m=0
(b) n=2, l=0, m= -1
(c) n=3, l=0, m=0
(d) n=3, l=1, m= -1
Ans. (b)
14. The relationship which describes the variation of vapour pressure with temperature is known as:
(a) Kirchhoff’s law
(b) Clausius-Clapeyron equation
(c) EquationHesss law
(d) Arrhenius equation
Ans. (b)
15. Phenol is more acidic than alcohol because:
(a) Phenol is more soluble in polar solvents
(b) Alcohol does not lose hydrogen atom
(c) Pentoxide ion is stabilized by resonance
(d) Pentoxide ion do not exhibit resonance
Ans. (c)
16. The element having highest electron affinity is:
(a) Bromine
(b) Iodine
(c) Fluorine
(d) Chlorine
Ans. (d)
17. Bakelite is prepared by the reaction between:
(a) Phenol and formaldehyde
(b) Urea and formaldehyde
(c) Ethylene and glycol
(d) Tetra ethylene and glycol
Ans. (a)
18. Which one of the following is a conjugated protein?
(a) Phosphoprotein
(b) Glycoprotein
(c) Chromoprotein
(d) All of the above
Ans. (d)
19. Iodine test is shown by
(a) Glucose
(c) Glycogen
(b) Starch
(d) Polypeptide
Ans. (b)
20. A fruity smell is obtained by the reaction of  ethanol with:
(a) CH3COCH3
(b) PCl5
(d) CH3CHO
Ans. (c)
Directions: In the following questions more than one of the answers given may be correct. Select the correct answers and mark it according to the code.
(a) 1, 2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct.
(d) 1 and 3 are correct
21. The enthalpy change for the process
(1) Heat of vaporisation
(2) Heat of sublimation
(3) Heat of atomisation
(4) Heat of allotropic change
Ans. (c)
22 The anodic mud obtained during electro refining of Cu contains:
(1) Ag
(2) Fe
(3) Au
(4) Zn
Ans. (d)
23. Which is natural polymer?
(1) Cellulose
(2) Protein
(3) SBR
(4) PMMA
Ans. (b)
24. Resolution can be done by:
(1) Mechanical method
(2) Biochemical method
(3) Chemical method
(4) Dialysis method
Ans. (a)
25. Aldehyde and ketone can be distinguished by:
(1) Tollen’s reagent
(2) Fehling’s reagent
(3) 2, 4 -DNP
(4) NaHC03
Ans. (b)
26. Which elements can detect by flame test?
(1) Na
(2) Ca
(3) Ba
(4) Be
Ans. (a)
27. The raw material in Solvay process is:
(1) NaC1
(2) CaCO3
(3) NH4C1
(4) CO2
Ans. (a)
28. Which are the acidic oxides?
(1) CO2
(2) SO2
(3) MgO
(4) AI2O3
Ans. (b)
29. Monodentate ligands are:
(1) H2O
(2) NH3
(3) EDTA
(4) Ethylene diamine
Ans. (b)
30. The greater stability of tert-butyl carbocation over methyl carbocation can be explained on the basis of:
(1) +1 effect of the methyl group
(2) Hyperconjugation effect of the methyl group
(3) Electromeric effect of the methyl group
(4) —I effect of the methyl group
Ans. (b)
31. Graphite is used:
(1) In making electrodes
(2) As lubricant
(3) As crucible in lead pencil
(4) In the manufacture of glass
Ans. (a)
32. IInd group basic radicals are:
(1) Pb
(2) Ba
(3) Sb
(4) Ni
Ans. (d)
33. Which are colligative properties?
(1) Osmotic pressure
(2) Pressure
(3) Elevation in boiling point
(4) Volume
Ans. (d)
34. Which are sulphide ores?
(1) Zinc blende
(2) Galena
(3) Cryolite
(4) Rutile
Ans. (b)
35. Disaccharide sugars are:
(1) Maltose
(2) Glucose
(3) Sucrose
(4) Raffinose
Ans. (d)

Chemistry practice test for C.B.S.E. All India Engineering Entrance Exam. (AIEEE)

Chemistry practice test   for C.B.S.E. All India Engineering Entrance Exam. (AIEEE)
Free online AIEEE Practice Test chemistry
AIEEE sample paper Chemistry
All India Engineering Entrance Examination (AIEEE) is an all-India common entrance examination conducted by CBSE.This is a sample Paper on subject of Chemistry
1. Cyanide process is used for extraction of:
(a) Ag
(b) Ni
(c) Pt
(d) Zn
Ans. (a)
2. An acid solution of 0.005 M has a pH of 5. The degree of ionisation of acid is:
(a) 0.1 x 10-2
(b) 0.2 x 10-2
(c) 0.5 x 10-4
(d) 0.6 x 10-6
Ans. (b)
3. Which metal gives hydrogen gas on heating with hot concentrated alkali?
(a) Ag
(b) Ni
(c) Zn
(d) Cu
Ans. (c)
4. The conversion of ethyl chloride into diethyl ether takes place by:
(a) Williamson’s synthesis
(b) Perkin’s reaction
(c) Wurtz reaction
(d) Grignard reaction
Ans. (a)
5. CHCl3 + C6H5NH2 + 3NaOH ← A+3B+3C
In the above reaction, the product ‘A’ is:
(a) Chlorobenzene
(b) Phenyl isocyanides
(c) Phenyl cyanide
(d) Phenyl chloride
Ans. (b)
6. A gas is found to have a formula [CO] x. Its vapour density is 70, the x is:
(a) 3.0
(b) 3.5
(c) 5.0
(d) 6.5
Ans. (c)
7. Which of the following is used as purgative?
(a) HgS
(b) Hg2Cl2
(c) HgC12
(d) ZnSO4
Ans. (b)
8. Least stable oxide of chlorine is:
(a) Cl2O
(b) ClO2
(c) C12O7
(d) ClO3
Ans. (a)
9. The sides of safety matches contains
(a) Red phosphorus + sand powder
(b) P4S3
(c) Ca(PO) 4 + glass pieces
(d) KC1O3, KNO3, sulphur + antimony
Ans. (a)
10. Chemically aspirin is known as:
(a) Salicylic acid
(b) Salicylaldehyde
(c) 2-acetoxybenzoic acid
(d) Phenyl salicylate
Ans. (c)
11. Borax is represented as:
(a) Na2B4O5(OH) 4.8H2O
(b) Na2B4O7.8H2O
(c) Na2B4O7. 4H2O
(d) Na2B4O7.7H2O
Ans. (a)
12. Which cannot be oxidized by H2O2 ?
(a) Na25O3
(b) PbS
(c) KI
(d) O2
Ans. (d)
13. The gas not absorbed by coconut charcoal is:
(a) He
(b) Ne
(c) Ar
(d) Kr
Ans. (a)
14. K1 and CuSO4 solutions on mixing produce:
(a) Cu212 + K2SO4
(b) Cu212 + I2 + K2SO4
(c) Cu12 ÷ K2SO4
(d) Cu12 + I2 + K2SO4
Ans. (b)
15. Vitamin B12 contains:
(a) Co
(b) Mn
(c) Mg
(d) Fe
Ans. (a)
16. Water glass is:
(a) Glass made of water
(b) Sodium silicate
(c) Calcium format
(d) Pyrex glass
Ans. (b)
17. Purification of alumina takes place by:
(a) Bosch process
(b) Hall’s process
(C) Hoope’s process
(d) Quartation process
Ans. (b)
18. What will be the product in the following reaction?
Ans. (a)
19. What will be the TUPAC name of given compound?'
(a) 2, 5-diethyl-4-methylhexane
(b) 3, 4, 6-trimethyloctane
(c) 2, 5, 6-trimethyloctane
(d) 3, 5-dimethyl-6-ethylheptane
Ans. (b)
20. The correct order of hybridisation of the central atom in the following species:
NH3, [PtCI4] 2-, PCl5 and BCl3 is:
(a) dsp2, dsp3, sp2, sp3
(b) sp3, dsp2, sp3d, sp2
(c) dsp2, sp2, sp3, dsp3
(d) dsp2, sp3, sp2, sp3
Ans. (b)
21. Unit of mole fraction is:
(a) mol-L
(b) mol/L2
(c) mol/L
(d) Dimensionless
Ans. (d)
22. The equivalent weight of phosphoric acid (H3PO4) in the reaction:
NaOH + H3PO4 → NaH2PO4 + H2Ois:
(a) 59
(b) 49
(c) 25
(d) 98
Ans. (d)
Ans. (c)
24. DDT is prepared by reacting chlorobenzene with:
(a) CHC13
(b) CClCHO
(c) CCl4
(d) C2H6
Ans. (b)
25. According to Heisenberg’s uncertainty principle, the product of uncertainties in position and ‘velocities for an electron of mass 9.1 xl0-31 kg is
(a) 2.8 x10-3 m2s-1
(b) 3.8x 10-5 m2s-1
(c) 5.8 x 10-5 m2s-1
(d) 6.8 x 10-6 m2-1
Ans. (c)
26. The state of hybridisation of B in BCI3 is:
(a) sp
(b) sp2
(c) sp3
(d) sp2d2
Ans. (b)
27. The significant figures in 3400 are:
(a) 2
(b) 5
(c) 6
(d) 4
Ans. (a)
28. For a Carnot engine, the source is at 500 K and the sink at 300 K. What is efficiency of this engine?
(a) 0.2
(b) 0.4
(c) 0.6
(d) 0.3
Ans. (b)
29. If 20 g of a solute was dissolved in 500 mL of water and osmotic pressure of the solution was found to be 600 mm of Hg at 15°C, then molecular weight of the solute is
(a) 1000
(b) 1200
(c) 1400
(d) 1800
Ans. (b)
30. Work done during isothermal expansion of one mole of an ideal gas from 10 atm to 1 atm at300 K is:
(a) 4938.8J
(b) 4138.8J
(c) 5744.1J
(d) 6257.2J
Ans. (c)
31. The number of sodium atoms in 2 moles of sodium ferrocyanide is:
(a) 12 x 1023
(b) 26 x 1023
(c) 34 x 1023
(d) 48 x 1023
Ans. (d)
32. According to Bohr’s principle, the relation between principle quantum number (n) and radius of orbit is
(a) r α n
(b) r α n2
(c) r α 1/n
(d) r α 1/n2
Ans. (b)
33. For an exothermic reaction, the value of:
(a) Δ E is negative
(b) Δ H is positive
(c) Δ H is negative
(d) Δ H equal to zero
Ans. (c)
34. The number of lattice arrangements in different crystal systems are
(a) 8
(b) 7
(c) 9
(d) 14
Ans. (b)
35. If equilibrium constants of reaction,
N2+ O= 2NO is K1, and
1/2N2 + 1/2O2 =NO is K2, then:
(a) K1 = K2
(b) K2 = √K1
(c) K1= 2K2
(d) K1 = 1/2K2
Ans. (b)
36. Wolframite ore is separated from tins tone ore by the process of:
(a) Roasting
(b) Electromagnetic
(c) Smelting
(d) Calcinations
Ans. (b)
37. If solubility product of HgSO4 is 6.4 x 10, then its solubility is:
(a) 8 x 10-3 mol/L
(b) 6.4 x 10-5 mol/L
(C) 6.4 x 10-3 mol/L
(d) 2.8 x 10-6 mol/L
Ans. (a)
38. Disintegration constant for a radioactive substance is 0.58 per hour. Its half-life period is:
(a) 82h
(b) 5.2h
(c) 1.2h
(d) 2.4h’
Ans. (c)
39. The rate constant of a reaction depends upon:
(a) Extent of reaction
(b) Time of reaction
(c) Temperature of the system
(d) Concentration of the system
Ans. (c)
40. A cylinder of 5 L capacity, filled with air at NTP, is connected with another evacuated cylinder of 30 L capacity. The resultant air pressure in both the cylinders will be:
(a) 10.8cm of Hg
(b) 14.9cm of Hg
(c) 21.8cm of Hg
(d) 38.8cm of Hg
Ans. (a)
41. The maximum number of hydrogen bonds formed by a water molecule in ice is :.
(a) 4
(b) 5
(c) 7
(d) 3
Ans. (d)
42. The volume strength of 1.5 N H2O2 solutions is:
(a) 8.4L
(c) 16.8L
(b) 4.2L
(d) 5.2 L
Ans. (a)
43. When a substance is dissolved in a solvent, the vapour pressure of solvent decreases. It brings:
(a) A decrease in boiling point of the solution
(b) An increase in boiling point of the solution
(c) A decrease in freezing point of the solution
(d) An increase in freezing point of the solution
Ans. (b)
44. Acetone reacts with iodine to form iodoform in the presence of:
(a) CaCO3
(b) NaOH
(c) KOH
(d) MgCO3
Ans. (b)
45. The chemical formula of diammine silver (I) chloride is
(a) [Ag(NH3)]Cl
(b) [Ag(NH3) 2 ]Cl
(c) [Ag(NH3) 2] 2 Cl
(d) [Ag (NH4) 2] CI
Ans. (b)
46. When alkyl halide is heated with dry Ag20, it produces:
(a) Ester
(c) Ketone
(b) Ether
(d) Alcohol
Ans. (b)
47. The IUPAC name of the compound
(a) 2-methoxy-1-butanol
(b) 3-methoxy-1-butanol
(c) 2-methoxy-1-butanal
(d) 1, 2-methoxy-butanol
Ans. (a)
48. Which of the following has the highest first ionisation energy?
(a) Li
(b) Be
(c) B
(d) C
Ans. (d)
49. Which of the following is used widely in the manufacture of lead storage battery?
(a) Arsenic
(b) Lithium
(c) Bismuth
(d) Antimony
Ans. (d)
50. By annealing, steel:
(a) becomes soft
(b) becomes liquid
(c) becomes hard and brittle
(d) Is covered with a thin film of Fe3O4
Ans. (a)