karnataka cet chemistryâ2003
2003
KARNATAKA CET CHEMISTRY‐2003 www.vinuthetutor.com
KARNATAKA CET CHEMISTRY‐2003
1. Temperature coefficient of a reaction is 2. When temperature is increased form 30 o C to 100 o C, rate of the reaction increases by: a. 250 times b. 500 times c. 100 times d. 128 times 2. A gas formed by the action of alcoholic KOH on ethyl iodide, decolorizes alkaline KMnO4. The gas is a. C2H4 b. C2H2 c. CH4 d. C2H6 3. Dacron is obtained by the condensation polymerization of a. Phenol and formaldehyde b. Phenol and phthalic acid c. Tere phathalic acid and formaldehyde d. Dimethyl terephthalate and ethylene glycol 4. The standard reduction potentials of Zn and Ag in aqueous solution at 298 K are
Zn+2 + 2e- ƒ Zn; E o = -0.76 V
and
Ag + + e- ƒ Ag ; E o = -0.80 V
. Which of the
following reactions take place? a.
Zn( s ) + Ag ( s ) ® Zn+2 (aq ) + Ag + (aq )
b.
Zn+2 ( s ) + Ag + (aq ) ® Zn( s ) + Ag ( s )
c.
Zn( s ) + 2 Ag + (aq ) ® Zn+2 (aq ) + 2 Ag + (s )
d.
Zn +2 (aq ) + 2 Ag ( s ) ® 2 Ag + (aq ) + Zn( s )
5. Identify the organic compound which, on heating with strong solution of NaOH, partly converted into an acid salt and partly into alcohol a. Benzaldehyde b. Acetone c. Acetaldehyde d. Benzyl alcohol 6. The ratio of cationic radius to anionic radius in an ionic crstal is greater than 0.732. Its coordination number is a. 4 b. 1 c. 8
2
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KARNATAKA CET CHEMISTRY‐2003 d. 6 7. The gaseous reaction
A + B ƒ 2 C + D + Q
is most favored at:
a. Low temperature and low pressure b. High temperature and low pressure c. High temperature and high pressure d. Low temperature and high pressure 8. The process by which synthesis of protein takes place based on the genetic information present in mRNA is called: a. Messenger hypothesis b. Replication c. Transcription d. Translation 9. The enthalpies of formation of Al2O3 and Cr2O3 are 1596 kJ and 1134 kJ respectively. for the reaction. 2Al+Cr2 O3
DH
® 2 Cr + Al 2 O3
a. +2730 kJ b. 1365 kJ c. 462 kJ d. 2730 kJ 10. Solubility product of a salt AB is 1 x 10 8 in a solution in which concentration of A is 10 3 M. the salt will precipitate when the concentration of B becomes more than a. 10 5 M b. 10 6 M c. 10 7 M d. 10 4 M 11. 4chloro3, 5dimethyl phenol is called a. Dettol b. Barbital c. Paracetamol d. Chloramphenicol 12. Which of the following is not a characteristic of chemisorptions? a. Adsorption is specific b. Adsorption may be multimolecular layer c. Adsorption is irreversible d.
DH
is of the order of 300 kJ
13. A signature, written in carbon pencil weighs 1 mg. what is the number of carbon atoms present in the signature? a. 0.502 x 10 20 b. 6.02 x 10 20
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KARNATAKA CET CHEMISTRY‐2003 c. 5.02 x 10 20 d. 5.02 x 10 23 14. The concentration of electrolyte required to coagulate a given amount of As2S3 sol is minimum in the case of a. Aluminium nitrate b. Potassium sulphate c. Potassium nitrate d. Magnesium nitrate 15. NH3 and HCl gas are introduced simultaneously from the two ends of a long tube. A white ring of NH4Cl appears first a. Nearer to the NH3 end b. Throughout the tube c. At the centre of the tube d. Nearer to the HCl end 16. The volume of water to be added to N/2 HCl to prepare 500 cm 3 of N/10 solution is a. 400 cm 3 b. 45 cm 3 c. 100 cm 3 d. 450 cm 3 17. Pick out the complex compound in which the central metal atom obeys EAN rule strictly a.
[Cu ( NH 3 )4 ] SO 4
b.
[Cr ( H 2O)6 ] Cl 3
c.
K 3 [ Fe(CN )6 ]
d.
K 4 [ Fe(CN )6 ]
18. The equivalent weight of a certain trivalent element is 20. Molecular weight of its oxide is a. 68 b. 168 c. 56 d. 152 19. The structure of orthophosphoric acid is:
a.
H
4
O - O - P = O
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KARNATAKA CET CHEMISTRY‐2003
b.
c.
H | O ¬ P - O - H | H H | O ¬ P - O - H | H | H
H d.
O - O - P - O - H | O | H
20. In a reversible reaction, the catalyst a. Decrease the activation energy of forward reaction b. Decrease the activation energy of both, forward and backward reaction c. Increases the activation energy of the forward reaction d. Increase the activation energy of the backward reaction 21. Identify the reaction that doesn’t take place during the smelting process of copper extraction a.
Fe + SiO2 ® FeSiO3
b.
2Cu2 S + 3O2 ® 2Cu2 O + 2 SO2 -
c.
Cu2 O + FeS ® Cu2 S + FeO
d.
2 FeS + 3O2 ® 2 FeO + 2 SO2 -
22. For a reaction A+BàC+D, if concentration of A is doubled without altering that of B, rate doubles. If concentration of B is increased nine times without altering that of A, rate triples. Order of the reaction is: a.
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KARNATAKA CET CHEMISTRY‐2003 b.
1 1 2
c. 1 d. 2 23. Heat liberated when 100 ml of 1 N NaOH is neutralized by 300 ml of 1N HCl a. 17.19 kJ b. 22.92 kJ c. 5.73 kJ d. 11.46 kJ 24. Enthalpy of formation of HF and HCl are 161 kJ and 92 kJ respectively. Which of the following statements is incorrect a. HF is more stable than HCl b. The affinity of fluorine to hydrogen is greater than the affinity of chlorine to hydrogen c. HF and HCl are exothermic compounds d. HCl is more stable than HF 25. The pH value of gastric juice in human stomach is about 1.8 and in the small intestine it is about 7.8. The pKa value of aspirin is 3.5. aspirin will be: a. Ionized in the stomach and almost unionized in the small intestine b. Ionized in the small intestine and almost unionized in the stomach c. Unionized in the small intestine and in the stomach d. Completely ionized in the small intestine and in the stomach 26. In the manufacture of sulphuric acid by contact process, Tyndall box is used to a. Test the presence of dust particles b. Convert SO2 to SO3 c. Remove impurities d. Filter dust particles 27. The percentage scharacter of the hybrid orbital in methane, ethane and ethyne are respectively a. 10,20,40 b. 50,75,100 c. 25,50,75 d. 25,33,50 28. The number of
a
and
b
particles emitted during the transformation of
Th 232 , to 82 Pb 208
90
are respectively: a. 6,4 b. 8,6 c. 2,2 d. 4,2 29. Which metal is used to make alloy steel for armour plates, safes and helmets?
6
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KARNATAKA CET CHEMISTRY‐2003 a. Pb b. Cr c. Mn d. Al 30. A colorless crystalline salt ‘x’ is soluble in dilute HCl. On adding NaOH solution, it gives a white precipitate which is insoluble in excess of NaOH. ‘x’ is: a. SnCl2 b. MgSO4 c. ZnSO4 d. Al2(SO4)3 31. When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is a. DDT b. Gammexane c. Chlorobenzene d. Benzotrichloride 32. Iodoform test is not answered by
a.
CH 3 - CH | OH
- CH 3
b. CH3COCH3 c. CH3OH d. C2H5OH 33. A galvanic cell is constructed using the redox reaction
1 H 2 ( g ) + AgCl ( s ) ƒ H + (aq ) + Cl - ( aq ) + Ag ( s ) 2 a.
Pt | H 2( g ) | HCl( so ln) || AgCl( s ) | Ag
b.
Pt | H 2( g ) | KCl( so ln) || AgCl( s ) | Ag
c.
Ag | AgCl( s ) | KCl( so ln) || HCl( so ln) | H 2( g ) | Pt
d.
Pt | H 2( g ) | HCl( so ln) || AgNO3( s ) | Ag
34. The order of reactivies of methyl halides in the formation of Grignard reagent is: a. CH3Br>CH3I>CH3Cl b. CH3Br>CH3Cl>CH3I c. CH3Cl> CH3Br> CH3I d. CH3I> CH3Br> CH3Cl
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KARNATAKA CET CHEMISTRY‐2003 35. In Goldschmidt aluminothermic process, thermite contains a. 1 part of Fe2O3 and 1 part of Al b. 3 parts Fe2O3 and 1 part of Al c. 3 parts of Fe2O3 and 2 parts of Al d. 3 parts of Al2O3 and 4 parts of Al 36. The flame colors of metal ions are due to a. Metal excess defect b. Metal deficiency defect c. Schottky defect d. Frenkel defect 37. Same amount of electric current is passed through solutions of AgNO3 and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated at S.T.P in the second class is: a. 22400 cm 3 b. 112 cm 3 c. 1.008 g d. 224 cm 3 38. A gaseous carbon compound is soluble in dilute HCl. The solution on treating with NaNO2 gives off nitrogen leaving behind a solution which smells a wood spirit. The carbon compound is a. CH3NH2 b. C2H5NH2 c. CO d. HCHO 39. Which of the following statements is incorrect regarding benzyl chloride? a. It is less reactive than vinyl chloride b. It undergoes nucleophile substitution reaction c. It is an aromatic compound which can give substitution in the side chain d. It gives white precipitate with alcoholic AgNO3 40. What is the volume of 20 volumes H2O2 required to get 5000 cm 3 of oxygen at STP? a. 125 cm 3 b. 100 cm 3 c. 50 cm 3 d. 250 cm 3 41. Urea is preferred to ammonium sulphate as nitrogenous fertilizer because a. It does not cause acidity in the soil b. It is quite stable c. It is cheaper than ammonium sulphate d. It is more soluble in water
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KARNATAKA CET CHEMISTRY‐2003 42. The reaction of a organic compound with ammonia followed by nitration of the product gives a powerful explosive called RDX. The organic compound is a. Formaldehyde b. Glycerine c. Toluene d. Phenol 43. The IUPAC name of (CH3)3CCH=CH2 is a. 3,3dimethyly1butene b. 2,2dimethyl3 butene c. 3,3,3trimethyl2propene d. 1,1,1trimethyl2propene 44. Thomas slag is a. CaCO3 b. MnSiO3 c. Ca3(PO4)2 d. CaSiO3 45. Angular momentum of an electron in the nth orbit of hydrogen atoms is given by a.
p 2nh
b.
2 p nh
c.
nh
d.
nh 2 p
46. Two gas cylinders having same capacity have been filled with 44 g of H2 and 44 g of CO2 respectively. If the pressure in CO2 cylinder is 1 atmosphere at a particular temperature, the pressure in the hydrogen cylinder at the same temperature is a. 44 atmosphere b. 22 atmosphere c. 1 atmosphere d. 2 atmosphere 47. Kinetic energy of one mole of an ideal gas at 300 K in kJ is a. 3.48 b. 34.8 c. 348 d. 3.74 48. An important reaction of acetone is auto condensation. In the presence of concentrated sulphuric acid acetone gives the aromatic compound________.
9
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KARNATAKA CET CHEMISTRY‐2003 a. Phorone b. Trioxan c. Mesityl oxide d. Mesitylene 49. The function of AlCl3 in FriedelCraft’s reaction is a. to produce electrophile b. to produce nucleophile c. to absorb water d. to absorb HCl 50. Railway wagon axles are made by heating iron rods embedded in charcoal poweder. This process is known as: a. Annealing b. Sheradising c. Case hardening d. Tempering 51. The tripeptide hormone present in most living cells is a. Ptyaline b. Oxytocin c. Glutamine d. Glutathione 52. An organic compound answers Molisch’s test as well as Benedict’s test. But it does not answer Seliwanoff’s test. Most probably, it is a. Maltose b. Fructose c. Protein d. Sucrose 53. In a lime klin, to get higher yield of CO2, the measure that can be taken is a. To pump out CO2 b. To maintain high temperature c. To add more CaCO3 d. To remove CaO 54. Energy is stored in our body in the form of a. Carbohydrates b. Fats c. ADP d. ATP 55. For a reaction if Kp>Kc, the forward reaction is favored by: a. Low temperature b. High temperature
10
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KARNATAKA CET CHEMISTRY‐2003 c. High pressure d. Low pressure 56. Pick out the statement which is not relevant in the discussion of collids a. Deltas are formed at a place where the river pours its water into the sea b. Artificial rain is caused by throwing electrified sand on the clouds from an aeroplane c. Potash alum is used in shaving rounds and as a stypic in medicine d. Sodium aluminium silicate is used in the softening of hard water 57. The element with atomic number 36 belongs to _______ block in the periodic table. a. d b. f c. s d. p 58. Ethyl benzoate reacts with PCl5 to give a. C2H5Cl +C6H5COOH+POCl3 b. CH3COCl+ C6H5COCl +POCl3 c. C C2H5Cl + C6H5COCl +POCl3 d. C2H5Cl+C6H5COCl+HCl 59. A wooden box excavate from Indus valley had an activity of 9.3 disintegration per minute per gm of carbon. What is the approximate age of this civilization? a. 6000 years b. 8100 years c. 5700 years d. 4000 years 60.
NaNO2 | H 2 SO4 H 2 O NaOH Phenol ¾¾ ¾¾¾ ® B ¾¾ ¾ ® C ¾¾¾ ®D
name of the reaction is
a. SchottenBaumann reaction b. ReimerTiemann reaction c. Phthalein fusion test d. Liebermann’s reaction
11
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KARNATAKA CET CHEMISTRY‐2003 www.vinuthetutor.com
KARNATAKA CET CHEMISTRY‐2003
1. Temperature coefficient of a reaction is 2. When temperature is increased form 30 o C to 100 o C, rate of the reaction increases by: a. 250 times b. 500 times c. 100 times d. 128 times 2. A gas formed by the action of alcoholic KOH on ethyl iodide, decolorizes alkaline KMnO4. The gas is a. C2H4 b. C2H2 c. CH4 d. C2H6 3. Dacron is obtained by the condensation polymerization of a. Phenol and formaldehyde b. Phenol and phthalic acid c. Tere phathalic acid and formaldehyde d. Dimethyl terephthalate and ethylene glycol 4. The standard reduction potentials of Zn and Ag in aqueous solution at 298 K are
Zn+2 + 2e- ƒ Zn; E o = -0.76 V
and
Ag + + e- ƒ Ag ; E o = -0.80 V
. Which of the
following reactions take place? a.
Zn( s ) + Ag ( s ) ® Zn+2 (aq ) + Ag + (aq )
b.
Zn+2 ( s ) + Ag + (aq ) ® Zn( s ) + Ag ( s )
c.
Zn( s ) + 2 Ag + (aq ) ® Zn+2 (aq ) + 2 Ag + (s )
d.
Zn +2 (aq ) + 2 Ag ( s ) ® 2 Ag + (aq ) + Zn( s )
5. Identify the organic compound which, on heating with strong solution of NaOH, partly converted into an acid salt and partly into alcohol a. Benzaldehyde b. Acetone c. Acetaldehyde d. Benzyl alcohol 6. The ratio of cationic radius to anionic radius in an ionic crstal is greater than 0.732. Its coordination number is a. 4 b. 1 c. 8
2
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KARNATAKA CET CHEMISTRY‐2003 d. 6 7. The gaseous reaction
A + B ƒ 2 C + D + Q
is most favored at:
a. Low temperature and low pressure b. High temperature and low pressure c. High temperature and high pressure d. Low temperature and high pressure 8. The process by which synthesis of protein takes place based on the genetic information present in mRNA is called: a. Messenger hypothesis b. Replication c. Transcription d. Translation 9. The enthalpies of formation of Al2O3 and Cr2O3 are 1596 kJ and 1134 kJ respectively. for the reaction. 2Al+Cr2 O3
DH
® 2 Cr + Al 2 O3
a. +2730 kJ b. 1365 kJ c. 462 kJ d. 2730 kJ 10. Solubility product of a salt AB is 1 x 10 8 in a solution in which concentration of A is 10 3 M. the salt will precipitate when the concentration of B becomes more than a. 10 5 M b. 10 6 M c. 10 7 M d. 10 4 M 11. 4chloro3, 5dimethyl phenol is called a. Dettol b. Barbital c. Paracetamol d. Chloramphenicol 12. Which of the following is not a characteristic of chemisorptions? a. Adsorption is specific b. Adsorption may be multimolecular layer c. Adsorption is irreversible d.
DH
is of the order of 300 kJ
13. A signature, written in carbon pencil weighs 1 mg. what is the number of carbon atoms present in the signature? a. 0.502 x 10 20 b. 6.02 x 10 20
3
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KARNATAKA CET CHEMISTRY‐2003 c. 5.02 x 10 20 d. 5.02 x 10 23 14. The concentration of electrolyte required to coagulate a given amount of As2S3 sol is minimum in the case of a. Aluminium nitrate b. Potassium sulphate c. Potassium nitrate d. Magnesium nitrate 15. NH3 and HCl gas are introduced simultaneously from the two ends of a long tube. A white ring of NH4Cl appears first a. Nearer to the NH3 end b. Throughout the tube c. At the centre of the tube d. Nearer to the HCl end 16. The volume of water to be added to N/2 HCl to prepare 500 cm 3 of N/10 solution is a. 400 cm 3 b. 45 cm 3 c. 100 cm 3 d. 450 cm 3 17. Pick out the complex compound in which the central metal atom obeys EAN rule strictly a.
[Cu ( NH 3 )4 ] SO 4
b.
[Cr ( H 2O)6 ] Cl 3
c.
K 3 [ Fe(CN )6 ]
d.
K 4 [ Fe(CN )6 ]
18. The equivalent weight of a certain trivalent element is 20. Molecular weight of its oxide is a. 68 b. 168 c. 56 d. 152 19. The structure of orthophosphoric acid is:
a.
H
4
O - O - P = O
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KARNATAKA CET CHEMISTRY‐2003
b.
c.
H | O ¬ P - O - H | H H | O ¬ P - O - H | H | H
H d.
O - O - P - O - H | O | H
20. In a reversible reaction, the catalyst a. Decrease the activation energy of forward reaction b. Decrease the activation energy of both, forward and backward reaction c. Increases the activation energy of the forward reaction d. Increase the activation energy of the backward reaction 21. Identify the reaction that doesn’t take place during the smelting process of copper extraction a.
Fe + SiO2 ® FeSiO3
b.
2Cu2 S + 3O2 ® 2Cu2 O + 2 SO2 -
c.
Cu2 O + FeS ® Cu2 S + FeO
d.
2 FeS + 3O2 ® 2 FeO + 2 SO2 -
22. For a reaction A+BàC+D, if concentration of A is doubled without altering that of B, rate doubles. If concentration of B is increased nine times without altering that of A, rate triples. Order of the reaction is: a.
5
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KARNATAKA CET CHEMISTRY‐2003 b.
1 1 2
c. 1 d. 2 23. Heat liberated when 100 ml of 1 N NaOH is neutralized by 300 ml of 1N HCl a. 17.19 kJ b. 22.92 kJ c. 5.73 kJ d. 11.46 kJ 24. Enthalpy of formation of HF and HCl are 161 kJ and 92 kJ respectively. Which of the following statements is incorrect a. HF is more stable than HCl b. The affinity of fluorine to hydrogen is greater than the affinity of chlorine to hydrogen c. HF and HCl are exothermic compounds d. HCl is more stable than HF 25. The pH value of gastric juice in human stomach is about 1.8 and in the small intestine it is about 7.8. The pKa value of aspirin is 3.5. aspirin will be: a. Ionized in the stomach and almost unionized in the small intestine b. Ionized in the small intestine and almost unionized in the stomach c. Unionized in the small intestine and in the stomach d. Completely ionized in the small intestine and in the stomach 26. In the manufacture of sulphuric acid by contact process, Tyndall box is used to a. Test the presence of dust particles b. Convert SO2 to SO3 c. Remove impurities d. Filter dust particles 27. The percentage scharacter of the hybrid orbital in methane, ethane and ethyne are respectively a. 10,20,40 b. 50,75,100 c. 25,50,75 d. 25,33,50 28. The number of
a
and
b
particles emitted during the transformation of
Th 232 , to 82 Pb 208
90
are respectively: a. 6,4 b. 8,6 c. 2,2 d. 4,2 29. Which metal is used to make alloy steel for armour plates, safes and helmets?
6
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KARNATAKA CET CHEMISTRY‐2003 a. Pb b. Cr c. Mn d. Al 30. A colorless crystalline salt ‘x’ is soluble in dilute HCl. On adding NaOH solution, it gives a white precipitate which is insoluble in excess of NaOH. ‘x’ is: a. SnCl2 b. MgSO4 c. ZnSO4 d. Al2(SO4)3 31. When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is a. DDT b. Gammexane c. Chlorobenzene d. Benzotrichloride 32. Iodoform test is not answered by
a.
CH 3 - CH | OH
- CH 3
b. CH3COCH3 c. CH3OH d. C2H5OH 33. A galvanic cell is constructed using the redox reaction
1 H 2 ( g ) + AgCl ( s ) ƒ H + (aq ) + Cl - ( aq ) + Ag ( s ) 2 a.
Pt | H 2( g ) | HCl( so ln) || AgCl( s ) | Ag
b.
Pt | H 2( g ) | KCl( so ln) || AgCl( s ) | Ag
c.
Ag | AgCl( s ) | KCl( so ln) || HCl( so ln) | H 2( g ) | Pt
d.
Pt | H 2( g ) | HCl( so ln) || AgNO3( s ) | Ag
34. The order of reactivies of methyl halides in the formation of Grignard reagent is: a. CH3Br>CH3I>CH3Cl b. CH3Br>CH3Cl>CH3I c. CH3Cl> CH3Br> CH3I d. CH3I> CH3Br> CH3Cl
7
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KARNATAKA CET CHEMISTRY‐2003 35. In Goldschmidt aluminothermic process, thermite contains a. 1 part of Fe2O3 and 1 part of Al b. 3 parts Fe2O3 and 1 part of Al c. 3 parts of Fe2O3 and 2 parts of Al d. 3 parts of Al2O3 and 4 parts of Al 36. The flame colors of metal ions are due to a. Metal excess defect b. Metal deficiency defect c. Schottky defect d. Frenkel defect 37. Same amount of electric current is passed through solutions of AgNO3 and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated at S.T.P in the second class is: a. 22400 cm 3 b. 112 cm 3 c. 1.008 g d. 224 cm 3 38. A gaseous carbon compound is soluble in dilute HCl. The solution on treating with NaNO2 gives off nitrogen leaving behind a solution which smells a wood spirit. The carbon compound is a. CH3NH2 b. C2H5NH2 c. CO d. HCHO 39. Which of the following statements is incorrect regarding benzyl chloride? a. It is less reactive than vinyl chloride b. It undergoes nucleophile substitution reaction c. It is an aromatic compound which can give substitution in the side chain d. It gives white precipitate with alcoholic AgNO3 40. What is the volume of 20 volumes H2O2 required to get 5000 cm 3 of oxygen at STP? a. 125 cm 3 b. 100 cm 3 c. 50 cm 3 d. 250 cm 3 41. Urea is preferred to ammonium sulphate as nitrogenous fertilizer because a. It does not cause acidity in the soil b. It is quite stable c. It is cheaper than ammonium sulphate d. It is more soluble in water
8
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KARNATAKA CET CHEMISTRY‐2003 42. The reaction of a organic compound with ammonia followed by nitration of the product gives a powerful explosive called RDX. The organic compound is a. Formaldehyde b. Glycerine c. Toluene d. Phenol 43. The IUPAC name of (CH3)3CCH=CH2 is a. 3,3dimethyly1butene b. 2,2dimethyl3 butene c. 3,3,3trimethyl2propene d. 1,1,1trimethyl2propene 44. Thomas slag is a. CaCO3 b. MnSiO3 c. Ca3(PO4)2 d. CaSiO3 45. Angular momentum of an electron in the nth orbit of hydrogen atoms is given by a.
p 2nh
b.
2 p nh
c.
nh
d.
nh 2 p
46. Two gas cylinders having same capacity have been filled with 44 g of H2 and 44 g of CO2 respectively. If the pressure in CO2 cylinder is 1 atmosphere at a particular temperature, the pressure in the hydrogen cylinder at the same temperature is a. 44 atmosphere b. 22 atmosphere c. 1 atmosphere d. 2 atmosphere 47. Kinetic energy of one mole of an ideal gas at 300 K in kJ is a. 3.48 b. 34.8 c. 348 d. 3.74 48. An important reaction of acetone is auto condensation. In the presence of concentrated sulphuric acid acetone gives the aromatic compound________.
9
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KARNATAKA CET CHEMISTRY‐2003 a. Phorone b. Trioxan c. Mesityl oxide d. Mesitylene 49. The function of AlCl3 in FriedelCraft’s reaction is a. to produce electrophile b. to produce nucleophile c. to absorb water d. to absorb HCl 50. Railway wagon axles are made by heating iron rods embedded in charcoal poweder. This process is known as: a. Annealing b. Sheradising c. Case hardening d. Tempering 51. The tripeptide hormone present in most living cells is a. Ptyaline b. Oxytocin c. Glutamine d. Glutathione 52. An organic compound answers Molisch’s test as well as Benedict’s test. But it does not answer Seliwanoff’s test. Most probably, it is a. Maltose b. Fructose c. Protein d. Sucrose 53. In a lime klin, to get higher yield of CO2, the measure that can be taken is a. To pump out CO2 b. To maintain high temperature c. To add more CaCO3 d. To remove CaO 54. Energy is stored in our body in the form of a. Carbohydrates b. Fats c. ADP d. ATP 55. For a reaction if Kp>Kc, the forward reaction is favored by: a. Low temperature b. High temperature
10
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KARNATAKA CET CHEMISTRY‐2003 c. High pressure d. Low pressure 56. Pick out the statement which is not relevant in the discussion of collids a. Deltas are formed at a place where the river pours its water into the sea b. Artificial rain is caused by throwing electrified sand on the clouds from an aeroplane c. Potash alum is used in shaving rounds and as a stypic in medicine d. Sodium aluminium silicate is used in the softening of hard water 57. The element with atomic number 36 belongs to _______ block in the periodic table. a. d b. f c. s d. p 58. Ethyl benzoate reacts with PCl5 to give a. C2H5Cl +C6H5COOH+POCl3 b. CH3COCl+ C6H5COCl +POCl3 c. C C2H5Cl + C6H5COCl +POCl3 d. C2H5Cl+C6H5COCl+HCl 59. A wooden box excavate from Indus valley had an activity of 9.3 disintegration per minute per gm of carbon. What is the approximate age of this civilization? a. 6000 years b. 8100 years c. 5700 years d. 4000 years 60.
NaNO2 | H 2 SO4 H 2 O NaOH Phenol ¾¾ ¾¾¾ ® B ¾¾ ¾ ® C ¾¾¾ ®D
name of the reaction is
a. SchottenBaumann reaction b. ReimerTiemann reaction c. Phthalein fusion test d. Liebermann’s reaction
11
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