UHS Sample paper 2010 Chemistry
Entrance Self Test 2012
CHEMISTRY
Here is the UHS sample paper 2010.
1.
Which type of bonding is present in NH4Cl
a.
Ionic
b.
Covalent
c.
Coordinate covalent
d.
All of these
2.
When CuSO4 is electrolyzed in aqueous solution
using copper electrodes, then the substance which deposits at the cathode is
a.
Copper metal
b.
Copper ions
c.
Hydrogen
d.
Oxygen
3.
Aldehydes can be synthesized by the oxidation of
a.
Primary alcohols
b.
Secondary alcohols
c.
Organic acids
d.
Inorganic acids
4.
The products of the fermentation of a sugar are
ethanol and
a.
Water
b.
Oxygen
c.
Carbon dioxide
d.
Sulfur dioxide
5.
______ serve as carriers of heredity from one
generation to the other.
a.
Lipids
b.
Caeseins
c.
Formaldehydes
d.
Nucleoproteins
6.
____ extraction is controlled by partition law
a.
Iodine
b.
Benzoic acid
c.
Solvent
d.
Stationery
7.
The process of effusion is best understood by _
____law
a.
Graham’s
b.
Charles’s
c.
Boyle’s
d.
None of these
8.
__ has dipole moment
a.
CO
b.
CO2
c.
Benzene
d.
All of these
9.
________ is used as catalyst in Haber’s process
for NH3 gas manufacture.
a.
Iron
b.
Carbon
c.
Copper
d.
Silver
10.
In many of its properties_________ is quite
different from the other alkali metals
a.
Li
b.
Be
c.
Na
d.
K
11.
Which element forms long chains alternating with
oxygen?
a.
Carbon
b.
Silicon
c.
Nitrogen
d.
All of these
12.
The percentage of carbon in medium carbon steel
is
a.
0.7-1.5
b.
0.1-0.2
c.
0.2-0.7
d.
1.6-2.00
13.
Name the rare halogen among the following
a.
F
b.
Cl
c.
I
d.
At
14.
Which bond will break when electrophile attacks
an alcohol?
a.
O-H
b.
C-O
c.
Both a and b
d.
None of these
15.
The extent of un saturation in a fat is
expressed as its
a.
Acid number
b.
Iodine number
c.
Saponification number
d.
None of these
16.
The process of filtration is used to
separate_______ particles from liquids.
a.
Radial
b.
Angular
c.
Insoluble
d.
Soluble
17.
London forces are very significant in
a.
Sulphur
b.
Phosphorous
c.
Argon
d.
Sugar
18.
Which of the following formations endothermic
reaction?
a.
2H2 + O2 à
2H2O
b.
C + O2à
CO2
c.
N2 + O2 à
N2O
d.
None of these
19.
Name the partially miscible liquids from the
following ?
a.
Alcohol-ether
b.
Nicotine-water
c.
Benz3ene-water
d.
Both a and b
20.
AlI3 is electrically a ________
a.
Conductor
b.
Non conductor
c.
Semiconductor
d.
None of these
21.
The elements of IIIA to VIIIA subgroups except
He are known as ___block elements
a.
Q
b.
S
c.
P
d.
None of these
22.
Concentrated nitric acid gives _________ when it
reacts with tin
a.
Nitric oxide
b.
Meta stannic acid
c.
Ammonium nitrite
d.
None of these
23.
sulphuric acid is used to manufacture
a.
HCl aond HNO3
b.
H3PO4
c.
Both a and b
d.
Both HCl and 2COOH
24.
Alkanes containing _____ carbon atoms are waxy
solids
a.
Upto 4
b.
5 to 17
c.
18 or
more
d.
None of these
25.
Which of the following is used to make chloral
hydrate?
a.
Acetaldehyde
b.
Formaldehyde
c.
None of these
d.
Both a and b
26.
Ten moles of hydrogen are allowed to react with
6 moles of oxygen. How much water will be obtained from reaction on complete
consumption of one gas?
a.
10 moles
b.
8 moles
c.
6 moles
d.
4 moles
27.
The highest temperature a substance can exist as
___ is called its critical temperature
a.
Solid
b.
Liquid
c.
Gas
d.
Isotope
28.
_______ hybridization leads to a regular
tetrahedral structure
a.
Sp3
b.
Sp2
c.
Sp
d.
All of these
29.
Osmotic pressure of a solution is __________property.
a.
Obligative
b.
Fractional
c.
Colligative
d.
Automated
30.
Magnesium reacts with hydrogen at high pressure
in the presence of catalyst_______ forming magnesium hydride.
a.
Dolomite
b.
MgI2
c.
Mg3N2
d.
Epsom salt
31.
Which metal is commonly used to remove air
bubbles from molten metals?
a.
Aluminum
b.
Copper
c.
Sodium
d.
Calcium
32.
With increase in number of unpaired electrons,
paramagnetism
a.
Increases
b.
Decreases
c.
Remains
d.
Decreases
33.
Which element has the larges number of
allotropic forms?
a.
Phosphorous
b.
Sulphur
c.
Oxygen
d.
Both a and c
34.
Which of the following bonds has minimum bond
energy?
a.
C-F
b.
C-Cl
c.
C-l
d.
C-Br
35.
Which of the following does not react with
water?
a.
Li
b.
Na
c.
Mg
d.
Be
36.
Al2O3(SiO2).2H2O is called
a.
Clay
b.
Talc
c.
Asbestos
d.
None of these
37.
CaO forms fertilize slag by reacting with
a.
P2O5
b.
Fe2O3
c.
Silica
d.
FeO
38.
________is colorless volatile liquid at room
temperature
a.
HCl
b.
HF
c.
HI
d.
HBr
39.
Hydrogen passed through phenol at 150 degree
centigrade in the presence of _______ catalyst gives cyclohexanol
a.
Tin
b.
Nickel
c.
Iron
d.
Sodium
40.
Ethanol-water is _________mixture
a.
Azeotropic
b.
Ideal
c.
Benedict’s
d.
Aliphatic
41.
The mobile phase in paper chromatography is usually
a.
An organic liquid
b.
Sulphuric acid
c.
Water
d.
Silver nitrate
42.
The amount of heat absorbed by one mole of solid
at 1 atm when it melts into liquid form is denoted by_________
a.
Delta Hv
b.
Delta Hf
c.
Delta Hl
d.
Delta Hs
43.
In synthetic fibers_______ bonding is responsible
for tensile strength.
a.
Nitrogen
b.
Hydrogen
c.
Oxygen
d.
None of these
44.
Boiling point of HF is ____H2O
a.
Lower than
b.
Higher than
c.
Equal to
d.
Almost same as
45.
_____is necessary for development of leaves and
it tends to accumulate in leaves and barks
a.
NO2
b.
Calcium
c.
Gypsum
d.
Nitrogen
46.
Which of the following is pale yellow to reddish
yellow in color
a.
Pb2O
b.
PbO2
c.
PbO
d.
2PbCO2.Pb(OH)2
47.
In which of the following carbon is double
bonded with itselp?
a.
Alkane
b.
Ether
c.
Alkene
d.
Alkyne
48.
In this process higher hydrocarbons can be cracked
at lower temperature and lower pressure.
a.
Thermal cracking
b.
Catalytic cracking
c.
Steam cracking
d.
Reforming
49.
Acetic acid is called ___acid
a.
Methanoic
b.
Propanoic
c.
Ethanoic
d.
Butanoic
50.
Na may be denoted by ______________ electron
configuration notation
a.
1s2 2s1
b.
[Ar] 4s1
c.
[Ne] 3s1
d.
None of these
51.
Which is the best drying agent in desiccators?
a.
KOH
b.
Gypsum
c.
CaCl2
d.
Silica sand
52.
100 m2 of a gas at 2 atm pressure and 27 degree
centigrade is transferred to a chamber of 300 m3 volume maintained at a
temperature of 327 degree centigrade.
What will be the pressure in chamber?
a.
6 atm
b.
4 atm
c.
2 atm
d.
1 atm
53.
The crystals of ___ are ionic solids
a.
Sugar
b.
Iron
c.
Diamond
d.
NaCl
54.
Which material possesses the highest pH?
a.
Soft drinks
b.
Bananas
c.
Milk of Magnesia
d.
Sea water
55.
The electron present in a particular orbit___
energy
a.
Releases
b.
Does not radiate
c.
Absorbes
d.
None of these
56.
Al2F2siO4 is named as
a.
Gibbsite
b.
Emerald
c.
Bauxite
d.
Cryolite
57.
Name the oxide in which N has the highest
oxidation number.
a.
Nitrous oxide
b.
Nitric oxide
c.
Nitrogen peroxide
d.
Nitrous anhydride
58.
Sulphur has oxidation state of
a.
+- w
b.
+4 and +6
c.
None of these
d.
Both a and b
59.
CH3-O-CH3 is example of _______ isomerism
a.
Metamerism
b.
Functional group
c.
Chain
d.
Position
60.
______ are product of reaction of an alcohol and
aromatic bi-functional acids
a.
Acrylic resins
b.
Polyester resins
c.
PVCs
d.
Polyaride resins
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