HIGHER SECONDARY - One Mark Model Test
–Chemistry
Full Portion Time: 1 hr Marks:
300
1. The bond order of Lithium molecule is
a)
1 b) 2 c) 3 d) 4
Answer: a
2. What is the maximum number of hydrogen
bonds in which a water molecule may form?
a) 1 b)
2 c) 3 d) 4
Answer: b
3. Which molecule is does not exist?
a) He2 b)
Be2 c)
Ne2 d)
all the above
Answer: d
4. Dual character of light was explained by
a) debroglie b)
Bohr c) Einstein d) Heisenberg
Answer: a
5. The charge of the electron is determined
by
a) Milliken oildrop experiment b)
J.J. Thomson’s experiment
c)
G.P. Thomson’s experiment d)
Rutherford experiment
Answer: a
6. The uncertainty principle is
a) Δx.Δp ≥ 4π/h b) Δx.Δp ≤ h/4π
c) Δx.mΔp≥h/4π d)
Δx.mΔp ≤ h/4π
Answer: c
7. The
energy needed to promote an electron from the first level to second level of
hydrogen atom is
a) 328kJ/mol b) 1312kJ/mol c)
984kJ/mol d)
1166kJ/mol
Answer: c
8. The
value of CI – CI bond distance is
a) 1.44Ao b) 1.54Ao c)
1.98Ao d)
2.28Ao
Answer: c
9. Which
metal has maximum Electron affinity?
a) gold b) silver c) copper d) platinum
Answer: a
10. If
XA - XB > 1.7, the ionic character in A - B bond is
a) 50% b) 75% c) 40% d) 25%
Answer: b
11. Which
element is in liquid state at room temperature?
a) Ga b)
In c) Ge d) Tl
Answer: a
12. The
rotten fish odour compound is
a) PCl3 b) PCl5 c) pH3 d) H3PO3
Answer: c
13. The
better chlorinating agent is
a) PCl3 b) PCl5 c) SO2Cl d) POCl3
Answer: b
14. Fluorine
reacts with water forms
a) O2 b) O3 c) OF2 d) both a & b
Answer: d
15. Bordeaux
mixture is
a) ZnCO3 + Ca (OH)2 b) AgNO3
+ Ca (OH)2
c) K2Cr2O7
+ Ca (OH)2 d)
CuSO4 + Ca(OH)2
Answer: d
16. Which
metal commonly called just?
a) Cu b)
Cr c) Zn d) Ag
Answer: c
17. The
colour of purple of cassius is
a) blue b)
purple c) red d) both b & c
Answer: c
18. The
flux added in the smelting process in the extraction of copper is
a) FesiO3 b) FeO c)
SiO2 d)
Cu2O + FeS
19. Silver
obtained from silver coin is purified by fusion with
a) borax b)
AgNO3 c) HNO3 d) H2SO4
Answer: a
20. The
percentage of gold in 22 carat gold is
a) 100% b)
97.67% c) 91.67% d) 87.12%
Answer: c
21. When
gold is heated with aguaregia which compound is formed?
a) AuCl2 b) AuCl3 c) Au(NO3)2 d) AuNO3
Answer: b
22. Which
is used in gas lamp materials?
a) Ceria b)
Thoria c) Mish metals d) both a & b
Answer: d
23. Alloys
of Lanthanides are called as
a) Metalloids b)
Mish metals c) Plate metals d) Actimides
Answer: b
24. f
- block elements are also called as
a) rare earth elements b) alkaline earth metals
c) Heavy earth elements d) transition elements
Answer: a
25. Actinides
show higher oxidation states due to
a) low binding energy b) high binding energy
c) greater shilding
effect d)
actinide contraction
Answer: a
26. The
fuel used in Nuclear power plants is
a) Pu - 238 b)
U - 235 c) Np - 238 d) Th - 232
Answer: b
27. Which
is used in tracer bullets?
a) ceria b)
theria c) pyrophoric
alloy d) mish metals
Answer: c
28. The
coordination number of cobalt in [Co(en)3]3+ is
a) 2 b) 3 c) 4 d) 6
Answer: d
29. An
example of chelating ligand is
a) en b)
oxalato c) EDTA d) all the above
Answer: d
30. The
central metal in chlorophyll is
a) Mg+ b) Mg2+ c) Fe2+ d) Fe3+
Answer: b
31. In
the reaction 90 Th232→82Pb208 the number of α and β
particles emitted are
a) 7α
, 5β b)
6α,
4β c) 4 α, 3 β d) 8 α, 6 β
Answer: b
32. Which
isotope is used in detection of eye temour?
a) H - 3 b)
C - 11 c) P - 32 d) Na - 24
Answer: c
33. The
energy released from sun is
a) 3.7 x 1033 erg/sec b) 7.3 x 10
33 erg/sec
c) 3.7 x 1023
erg/sec d)
7.3 x 1023 erg/sec
Answer: a
34. In
an Edge centred cubic, the edge centred atom is shared by
a) 2 unit cells b)
4 unit cells c) 6
unit cells d) 8 unit cells
Answer: b
35. The
most common point defect is
a) schottky defect b) frenkel defect
c) Metal excess defect d) both a &
b
Answer: d
36. The
number of Nacl unit per unit cell is
a) 2 b)
4 c) 6 d) 8
Answer: b
37. Which
of the following does not result in an increase in entropy?
a) Crystlline of sucrose from solution b) vapourisation of camphor
c) conversion of ice to
water d)
vapourisation of camphor
Answer: a
38. If
ΔG for a reaction is positive, the change is
a) spontaneous b)
non - spontaneous c) reversible d) equilibrium
Answer: b
39. The
entropy of vapourisation of a liquid is equal to
a) 20 cal k-1 mol-1 b) 25 cal k-1 mol-1
c) 21 cal k-1 mol-1 d)
30 cal k-1 mol-1
Answer: c
40. The
final temperature of an engine whose initial temperature is 400K and having 25%
efficiency is
a) 200K b)
400K c) 300K d) 450K
Answer: c
41. s = q/T is valid only for ____________
a) forward reactions b) backward reaction
c) reversible process d) none of
these
Answer: c
42. In
an cyclic process, which of the following is true?
a) q = -w b)
q = 0 c) Δ E = 0 d)
PΔV = 0
Answer: b
43. When
does entropy increases in a chemical reaction?
a) np > nr b) np < nr c) np = nr d)
both a & c
Answer: a
44. Δ ng value for C(s) + O2(g) → CO2(g) is
a) -1 b)
0 c) 1 d) none of these
Answer: a
45. The
unit of Kc for H2(g) + l2(g) ⇌ 2Hl(g) is
a) mol dm-3 b) mol dm-3 c) mol-1 dm3 d) no unit
Answer: d
46. In
Q < Kc then __________ reaction is favoured
a) forward b)
backward
c) both forward &
backward d) none
of these
Answer: a
47. The
pressure applied in Haber’s process is
a) 300 - 500 atm b) 400 - 450 atm c) 500 - 550 atm d) 700 - 1200 atm
Answer: a
48. For
which of the following reaction Kp = Kc?
a) H2(g) + I 2(g) ⇌ 2HI(g) b) PCI5(g) ⇌ PCI3(g) +
CI2(g)
c) N2(g) + O2(g) ⇌ 2 NO(g) d)
both a & c
Answer:
d
49. For
the reaction N2(g) + O2(g) ⇌ 2NO(g), Δ H = x kJ, which of the
following favours forward reaction?
a) increase of pressure b) decrease of pressure
c) increase of
temperature d)
decrease of temperature
Answer: c
50. For
Hl formation, number of moles H2,l2 and Hl are 1,2,3 mole
respectively. Calculate the partial pressure of Hl when total pressure is 60
atm
a) 10 atm b)
20 atm c) 30 atm d) 40 atm
Answer: c
51. The
half life period of a first order reaction is 100 minutes. Then its rate
constant is
a) 6.93 x 102 min-1 b) 0.693 x 10-2 min-1
c) 6.93 x 10-2 min-1 d)
69.3 x 10-1 min-1
Answer: c
52. t90%
= 10 hour for a first order reaction then t99% is equal to
a) 20 hr b)
100 hr c) 200 hr d) 300 hr
Answer: a
53. Saponification
of diester inpresence of alkali is an example for
a) simple reaction b) consecutive reaction
c) parallel reaction d)
opposing reaction
Answer: b
54. Concentration
of pure water perlitre is equal to
a) 55.45 moles b)
55.55 moles c) 55.65 moles d) 55.75 moles
Answer: b
55. For
selective hydrogenation of alkenes into alkanes the catalyst used is
a) pd. partially inactivated by quinoline b) Ni at 250oC
c) pt at 25oC
d)
Raney Nickel
Answer: a
56. Fog
is a colloidal solution of
a) liquid in gas b) solid in gas c)
gas in liquid d) gas in solid
Answer: a
57. The
promoter used in Bosch’s process is
a) cucl2 b) Fe2O3 c) cr2O3 d) V2O5
Answer: c
58. Which
of following is more readily soluble and easily liquefiable gas?
a) H2 b) N2 c) O2 d) Cl2
Answer: d
59. The
negative catalyst for decomposition of H2O2 is
a) alcohol b)
glycerine c) MnO2 d) glycol
Answer: b
60. An
example for emulsion type is
a) paint b)
ink c) curd d) milk
Answer: d
61. Arsenic
sulphide sol is prepared by
a) peptisation b)
Bredig’s are method
c) Double decomposition d) Mechanical dispersion method
Answer: c
62. For the titration between Hydrochloric acid and
sodium carbonate the suitable indicator is
a) potassium permanganate b) Phenolphthalein
c) litmus d)
methyl orange
Answer: d
63. The
specific conductance of a 0.1 M solution of KCl is 0.0014 mho cm-1 at
25oC, its equivalent conductance is
a) 14 mho cm2 geq-1 b) 140 mho
cm2 geq-1
c) 1.4 mho cm2
geq-1 d)
0.14 mho cm2 geq-1
Answer: b
64. The
ionic product of water at 298 K is
a) 1x10-7mol dm-3 b) 1x10-10mol2 dm-6
c) 1x10-14mol2dm-6
d) 0
Answer: c
65. The
ionised form of methyl orange is in ________ colour
a) pink b)
yellow c) green d) colourless
Answer: a
66. Which
one of the reagent is used for the dihydroxylation of alkene?
a)
fentons b) lucas c) Baeyers d) tollens
Answer: a
67. Which type of reaction takes place when
tert butyl alcohol reacts with copper at 573 K?
a) dehydrogenation b)
dehydration c) oxidation d) loss of electron
Answer: a
68. The reactivity order of alcohols with Na is
a) 1o <2o <3o b) 1o > 2o
> 3o c) 3o
> 2o > 1o d)
1o < 2o < 3o
Answer: b
69. Which of the following is unsymmetrical
ether?
a) CH3 - O - C2H5 b) CH3 - O – CH3 C) C2H5 - O - C2H5 d) C6H5 - O – C6H5
Answer: a
70. When ether is exposed to air for some time
an explosive substance produced is
a) oxide b)
superoxide c) peroxide d) TNT
Answer: c
71. Higher ether can be prepared from lower
members by the action of
a) con H2SO4 b) AgOH c)
sodium alkoxide d) grignard reagent
Answer: d
72. Which of the following is used in
perfumery?
a) dimethyl ether b)
diethyl ether c) ethyl methyl
ether d) methyl phenyl ether
Answer: d
73. Zeisels method is used for estimation of
________ group
a) halide b)
amino c) hydroxyl d) methoxy
Answer: d
74. In the reaction of ethers with BF3,
BF3 acts as
a) lewis acid b)
lewis base c) arhennius acid d) arrhenious base
Answer: a
75. From
which of the following sec butyl alcohol is obtained by the action of methyl
magnesium iodide?
a) HCHO b)
CH3 - CHO c) CH3
- CO - CH3 d)
CO2
Answer: b
76. Schiffs
reagent gaive pink colour with
a) acetone b)
acetaldehyde c) ethyl alcohol d) methyl acetate
Answer: b
77. Aldehydes
without α hydrogen undergo
a) polymerisation b) claisen reaction c)
aldol condensation d) cannizaro
reaction
Answer: d
78. Oil
of bitter almond is
a) tinitro phenol b) benzyl alcohol c)
nitro benzene d)
benzaldehyde
Answer: d
79. The
acid that cannot be prepared by grignard reagent is
a) acetic acid b)
formic acid c) butyric acid d) benzoic acid
Answer: b
80. Which
of the following is used as an antiseptic and astringent?
a) silver nitrate b) silver lactate c)
silver acetate d)
silver formate
Answer: b
81. Anthranilic
acid is
a) O - amino benzoic acid b) P - amino benzoic
acid
c) O - hydroxy benzoic
acid d) m - amino
benzoic acid
Answer: a
a) aq NaOH b)
anhy AlCl3 c)
alk KOH d) moist Ag2O
Answer: d
a) CH3 CH2 CONH2 b) CH3 CN c) CH3COOH d) (CH3CO)2
O
Answer: b
|
0oC
|
a) C6H5CI b) C6H5NHOH c) C6H5N2CI d) C6H5OH
Answer: c
85. The
compound that is most reactive towards electrophilic nitration is
a) methyl benzene b) benzene c)
benzoic acid d) nitro benzene
Answer: b
86. Nitro
benzene on reduction with Zn /NaOH gives
a) azoxy benzene b) azo benzene c)
hydrozoa benzene d) aniline
Answer: c
87. Which
of the following will react with Br2/NaOH
a) (CH3)2 C-NO2 b) CH3-CH2-NO2 c) C6H5NO2 d) C6H5ONO2
Answer: b
88. Schotten
Baumann reaction is the formation of
a) acetamide b)
acetanilide c)
diazonium salt d) benzanilide
Answer: d
89. When
nitro ethane is boiled with con HCl it is hydrolysed to form
a) formic acid and nitrogen b) acetic acid and nitrogen
c) formic acid and hydroxylamine d) acetic acid and hydroxylamine
Answer: d
90. The
test for aniline is
a) Fehlings test b) Ferric chloride test
c) bromination test d)
Reimer tiemann test
Answer: c
91. Aniline
couples with benzene diazonium chloride to form
a) benzal aniline b) p - amino azo benzene
c) p benzo quinine d)
benzanilide
Answer: b
92. The
IUPAC named of CH3 – CN is
a) methyl cyanide b) acetonitrile
c) ethane nitrile d)
cyano ethane
Answer: c
93. Benzene
diazonium chloride reacts with acetic acid, it forms
a) phenyl acetate b) benzene c)
anisole d) phenol
Answer: a
94. The
no of asymmetric carbon is fructose is
a) 3 b)
4 c) 5 d) 6
Answer: a
95. Starch
react with iodine forms colour
a) black b)
red c) green d) blue
Answer: d
96. The
amino acid without chiral carbon is
a) glycine b)
alanine d) proline d) thyrosine
Answer: a
97. The
precipitation of proteins is known as
a)
denaturation b) renaturalition c) coagulation d) peptisation
Answer: a
98. Which
of the following is a disaccharide?
a) lactose b)
sucrose c) maltese d) all the above
Answer: b
99. D(+)
Glucose and D(-) fructose are isomers
a) optical b)
sepimers c) anomers d) functional
Answer: a
100. Basicity
of pyrophosphoric acid is
a) four b)
three c) two d) one
Answer:a
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