CHEMICAL
BONDING
1)With reference to ionic compounds, consider the
following statements: (2003)
i) Ionic compounds are insoluble in alcohol
ii) Ionic compounds in the solid state are good
conductors of electricity
Which of these statements is/are correct?
a)
Only I
b) Only ii
c)
Both I and ii
d) Neither I nor ii Ans :
only i
2) Which one of the following is paramagnetic in nature ? (1997)
a) Iron b)
Hydrogen c) Oxygen d) Nitrogen Ans:
Oxygen
3) The basic reason for the extraordinary sparkle of a
suitably cut diamond is that(1994)
a) It has a very high transparency
b) It has a very high refractive index
c) It is very hard
d) It has well-defined cleavage planes Ans:
(b)
PHYSICAL
CHEMISTRY
Structure of Atom:
1)
In an atom, the orded of filling up of the orbitals is governed by
: (2000)
a)
Aufbau principle b) Heisenberg’s uncertainly principle
c)Hund’s rule d) pauli’s exclusion principle Ans:
( c )
2)
The alpha particle carries two positive charges.
Its mass is very nearly equal to that of
(1996)
a) Two
protons b) an atom of helium c)sum of masses of two positrons and two
neutrons
d)
Two positrons as each positron carries a single
positive charge Ans: (b)
KINETIC THEORY OF MATTER:
1)
Regarding the atom of a chemical element, the magnetic quantum
number refers to (2003)
a)
Orientation
b) shape c) size d) spin Ans: ( a )
NATURE OF MATTER:
1)
Which one of the following present in the largest amount in terms of percent by
mass in the earth’s crust?
(1997)
a) Silicon b) Oxygen
c) Carbon d) Calcium Ans: Oxygen (upto 46.8%)
2)
One mole of hydrogen gas burns in excess of
oxygen to give 290 kJ of heat. What is the
(1994)
Amount of heat produced when 4 g
of hydrogen gas is burnt under the same conditions?
a)145 kJ b) 290 kJ
c) 580 kJ d) 1160 kJ Ans: ( c )
3) If a gas is compressed to half of its original volume
at 27 degrees C, to what temperature should it be heated to make it occupy its
original volume ? (1994)
a) 327° C b) 600°
C c) 54° C d) 300° C Ans: (a )
PERIODIC TABLE OF ELEMENTS:
1)
The most reactive among the halogens is (
1997)
a) Fluorine b) chlorine
c) bromine d) iodine Ans: ( a )
2)Consider the following statements with reference to the
Periodic Table of chemical elements: (2001)
1. Ionisation
potential gradually decreases along a period
2. In a group
of elements, electron affinity decreases as the atomic weight increases
3. In a given
period, electronegativity decreases as the atomic number increases
Which of these
statement is / are correct ?
a) 1
only b) 2 only
c) 1 and 3 d) 2 and 3 Ans: b) 2
only
2)
In the periodic table of chemical elements,
electron affinity is always found to increase from top to bottom in a
group. What is atomic radii ? ( 2003 )
a) Is
the distance from centre of nucleus of an atom to the outmost shell of electron
b) It
is electrons
c) It
is neutrons
d) It is protons
Ans : a
RADIO ACTIVITY :
1)
Which one of the following is not radioactive
?
(2001)
a) Astatine b) Francium
c) Tritium d) Zirconium Ans: d
2)
The half-life of a radioactive element is 5
years. The fraction of the radioactive substance that remains after 20 years
is (
1994)
a) ½ b) ¾
c) ⅛ d) ⅟16 Ans: d
TYPES OF
CHEMICAL SOLUTIONS
1)Which one of the following statements is not correct? (2002)
a) The boiling point of an aqueous solution is higher
than that of pure water
b) Addition of solutes to a solution causes an increase
in its water potential
c) The vapour pressure of the water in a solution is
lower than that of pure water
d) When a solution is separated from water by a
semipermeable membrane, water movement can be prevented by applying pressure to
the solution Ans
: (b)
2) Soft drinks such as colas contain significant
quantities of (2002, 2000)
a) Caffeine b)
Nicotine c) Tannin d) Resin Ans
: (d)
3) Consider the following statements: (2000)
Hard water is not suitable for
1)
Drinking 2) Washing clothes with soap
3)Use of boilers 4) Irrigating crops
Which of these statements are correct?
a)
1 and
3 b) 2 and 3
c)1,2 and 4 d) 1,2,3 and 4 Ans:
(d)
4) Water is a good solvent of ionic salts because (1994)
a) It has a high boilng point
b) It has a high dipole m ovment
c) It has a high specific heat
d) It has no colour Ans
: (b
5) Which one of the following colloidal systems is
represented by fog? (1993)
a) liquid in gas
b) Gas in liquid
c) solid in gas
d) Liquid in liquid Ans:
(b)
INORGANIC CHEMISTRY
1)
Which one of the following materials is very
hard and very ductile? (2000)
a)
Carborundum
b) Tungsten c) Cast Iron d) Nichrome
Ans: (d)
2)
A: Sodium metal is stored under kerosene
R: Metallic sodium melts when
exposed to air Ans: ( c ) (1998)
Explanation: When sodium is kept
in air, it burns to form Na2 O and Na2
O 2
3)
Consider the following statements about
acetylene (1998)
1. It
is used in welding industry
2. It
is raw material for preparing plastics
3. It
is easily obtained by mixing silicon carbide and water
Of these statements:
a) 1
and 2 are correct b) 1 and 3 are
correct
c)2 and 3 are correct d) 1,2 and 3 are correct Ans: (b)
4) Which one of the following elements is allowed with
iron to produce steel which
(1996)
can resist high temperatures and also have high hardness
and abrasion ‘resistance?
a)
Aluminium
b) Chronium c) Nickel d) Tungsten Ans: (b)
5)Monozite is an ore of (1994)
a) Zirconium b)
Thorium c) Titanium d) Iron Ans : (b)
6) Galvanised iron sheets are protected from rusting due
to the presence of a layer of
(1994)
the presence of a
layer of
a)
Lead
b) Chronium c) Zinc d) Tin Ans (c )
7) Quartzite is metamorphosed from (1994)
a) Limestone b)
Obsidian c) Sandstone d) Shale Ans : ( c )
ELECTRO CHEMISTRY
1)
Aluminium
surface are often ‘anodized’ . This means the deposition of a layer
of (2000)
a)
Chromium oxide
b)Aluminium oxide c) Nickel
oxide d) Zinc oxide Ans: (b)
2)
Which one of the following metals does not form
amalgams ? (1998)
a)
Zinc b)
Copper c) Magnesium d) Iron
Ans: (b)
3)
Which one of the following pairs of materials
serves as electrodes in chargeable batteries commonly used in devices such as
torchlight, electric shavers etc? ( 1995)
a)
Nickel and cadmium b) zinc and carbon c) lead peroxide and lead d) iron and cadmium Ans:(a)
DETERGENTS AND SOAPS
1)
Consider the following statements: (2003)
The purpose of adding sodium sulphate and sodium silicate
to the detergent in a washing powder is
a)
To keep the washing powder dry
b)
To maintain the alkalinity of the powder Ans
: a
2)
Synthetic detergents can leather well in which
water?
Ans : Well water (2002)
ACIDS AND BASES
1)
An aqueous solution of copper sulphate is acidic
in nature because the salt undergoes
a) Dialysis b) electrolysis c) hydrolysis d) photolysis
(2001)
Ans: c
2)
When ants bite, they inject
a) Glacial
acetic acid b) methanol c) formic acid d) stearic acid ( 1999)
Ans: c
3)
Glass can be etched or scratched by
a) Diamond b) hydrofluoric acid c) aquaregia
d) conc.sulpuric acid
(1999)
Ans: diamond used for cutting and hydrofluoric acid for writing on the
glass
4)
To dilute sulphuric acid, ____ is added to the
water and not water to acid (
1999)
Ans: acid
5)
Formic acid is a _______ acid than acetic
acid (1999)
Ans: stronger
6)
Acid precipitation is now regarded as a serious
problem in some European
(1998)
and Asian countries. Its major
cause or source is
a) Discharge
of acidic effluents onto neutral or slightly alkaline land where the acidic
components precipitate
b) Emissions
of sulphur oxides and nitrogen oxides from thermal powder plants and burning of
fossile fuels; these oxides dissolve in atmospheric water vapour and fall back
on earth as acid rain
c) Naural
carbondioxide released during respiration of living oranisms dissolves in
water, forming carbonic acid which is the chief contributor to acidity in rain
water
d) Chlorofluorocarbons
readily react with various chemicals near the earth’s surface, producing acidic
intermediates which cause acid precipitation Ans¨(b)
7)
Vinegar is an aquerous solution of (
1993)
a) Oxalic
acid b) citric acid c) acetic acid d) hydrochloric acid Ans: c
INDUSTRIAL CHEMISTRY
1)Coal based thermal power stations contribute to acid
rain because ______ are emitted when
coal burns.
a) oxides of carbon Ans:
a (
2003)
2)Most of the explosions in mines occur, due to the
mixing of (
2000)
a) hydrogen with oxygen
b) oxygen with acetylene c)
methane with air
d) carbon dioxide with ethane Ans:
c
3)Phenyl is used as a household ________ (1998)
a) germicide Ans:
a
METALLURGY
1)
Match the following :
(2000)
Industrial
Process Industry
with which associated
A.
Cracking 1.
Rubber
B.
Smelting 2.
Petroleum
C.
Hydrogenation 3.
Copper
D.
Vulcanization 4.
Edible Fats
Ans: A:2,
B:3, C:4, D:1
2)
Consider the following statements: (1998)
Coke is one of the materials of the charge added to blast
furnace for the production of steel/iron. Its function is to
1.
Act as the reducing agent
2.
Remove silica associated with the iron ore
3.
Function as fuel, to supply heat
4.
Act as an oxidizing agent
Of these statements which are
correct:
a) 1
and 2 b) 2 and 4
c) 1 and 3 d) 3 and 4 Ans
: c
ORGANIC CHEMISTRY
HYDROCARBONS:-
1)
Which one of the following is the correct
sequence in increasing order of molecular weights of the hydrocarbons ? (2001)
a)
Methane, ethane, propane and butane
b)
Propane, butane, ethane and methane
c)
Butane , ethane, propane and methane
d)
Butane, propane, ethane and methane
Ans: (a)
2)
Which one of the following types of coal
contains a higher percentage of carbon than the rest ? (1999)
a) Bituminuous
coal b) Lignite c) Peat
d) Anthracite Ans: (d) Anthracite
3)Which one of the following has the highest fuel
value? (1997)
a) Hydrogen b)
Charcol c) Natural gas d) Gasoline Ans : (a) Hydrogen
BIO-CHEMISTRY
ENVIRONMENTAL CHEMISTRY AND POLLUTION
1)
Which one of the following is produced during
the formation of photochemical smog?
(2003)
a)
Hydrocarbons b) Nitrogen Oxides c) Ozone
d) ethane Ans: (b) Nitrogen
Oxides
2)
The water pollution in river is measured by
dissolved amount of ______ (1998)
a)
Chlorine
b) Ozone c) Nitrogen d) Oxygen Ans: (d)
Oxygen
3)
Which one of the following fuels causes minimum
environmental pollution? ( 1995)
a)
Diesel b)
Coal c) Hydrogen d) Kerosene Ans: ( c ) Hydrogen
4)
The main constituents of peal are (1994)
a) Calcium
carbonate and magnesium carbonate
b) Aragonite
and conchiolin
c) Ammonium
sulphate and sodium carbonate
d) Calcium
oxide and ammonium chloride Ans:
(a)
5)Which radioactive pollutant has recently drawn the
attention of the public, due to its occurrence in the building material?
a) Plutonium b)
Thorium c) Radon d) Radium Ans: ( c )
(1994)
5)
If water pollution continues at its present
rate, it will eventually (
1994)
a) Stop water cycle
b) prevent precipitation c) make
oxygen molecules unavailable to water plants
d) make nitrate unavailable to water plants Ans: ( c )
ECOLONY AND ENVIRONMENT
1)Within biological communities, some species are
important in determining the ability of a large number of other species to
persist in the community. Such species are called as (2000)
a) Keystone species
b) Allopatric species c)
Sympatric species d) Threatened
species Ans: a
2)Which one of the following organisms is likely to show
the highest concentration of DDT once it has been introduced into the ecosystem
?
(1997)
a) Grasshopper
b) Toad c) Snake d) Cattle Ans : c
3)The only anthropoid ape to be found in India is
the
(1994)
a) Hanuman monkey
b) Lion tailed macaque of Western Ghats
c)Slow Loris of Assam
d) White brewed gibbon of Assom Ans: d
4)Biofilms are (1993)
a) colour films used by biologists to photograph living
organisms
b) Photomicrographs of micro-organisms from various
habitats
c) accumulation of micro-organisms at surfaces such as those of a rock, a tooth
or an oil droplet
d) Photographic films made through fermentation processes
of certain industrial microorganisms
Ans:c
5)Which one of the following provides the best estimate
of the world’s biological diversity?
(1993)
a) Of about ten million species probably alive today,
some 20 species are lost everyday, most of them unknown because no more than
half a million have, yet been actually identified by sientists
b)Of about thirty million living species, some 50 are
lost every day, most of them unknown because no more than half a million have
yet been actually identified by scientists
c)Of about forty five million living species, some 100
are lost everyday, most of them unknown because no more than 1.5 million have
been actually identified
d)Of about seventy five million living species, some 500
are lost everyday, most of them unknown because no more than 3 million have
been actually identified
Ans: (d)
6)Which one of the following strongly threatens
biodiversity? (1993)
a) Fragile ecosystems such as mangroves and wetlands
b)Inaccessible habitats in the Himalayas
c)Destruction of natural habitats, vegetation and
shifting cultivation
d) Creation of biosphere reserves Ans:
( c )
FOOD CHEMISTRY
1)
Saturated fats have single bon in their
structure. Unsaturated fats can have
double or more than double bonts which results in ______________ compared to
saturated fats ( 2003)
Ans: very high reactivity
2)
Drinking of whisky increases the frequency of
urination. Alcohol intake speeds up
the secretion of vasopressin in the body. True / Untrue (2002)
Ans: True
3)
Which one of the following is an active compound
of oil of clove? (1997)
a) Menthol b) Eugenol
c) methanol d) Benzaldehyde Ans: (b)
4)
The characteristic odour of garlic is due to (
1997)
a) A
chloro compound b) a sulphur compound
c) A fluorine compound d) acetic acid Ans: (b)
5)
Which of the following elements are present in
all proteins? (1995)
a) Carbon b) Hydrogen
c) Oxygen d) Nitrogen Ans: All
the above
6)
Consumption of fish is considered to be
healthy when compared to flesh of other animals because fish contains? (1995)
a) Polyunsaturated
fatty acids b) saturated fatty acids
c)Essential vitamins d) more carbohydrates and proteins Ans: (a)
AGRICULTURE CHEMISTRY:
1)
Which one of the following is a mixed fertilizer
? (1995)
a)Urea b) CAM
c) Ammonium sulphate d) NPK Ans: d
Nitrogen,Phosphorous,Potassium
POLYMERS AND PLASTICS:
1)
Which one of the following polymers is widely
used for making bullet proof material?
(1995)
a) Poly
vinyl chloride b) polyamides c) polyethylene d) polycarbonates Ans: (b)
BIOCHEMISTRY AND LIFE PROCESS:
1)The major chemical compound found in human kidney stone
is (1998, 2000)
a)Uric acid b)
calcium carbonate c) calcium
oxalate d) calcium sulphate Ans: ( c )
2)Which of the following professional(s) are more likely
to run the risk of a permanent change in their cell’s DNA? (1996)
1)
Researchers using carbon-14 isotope 2)
X-ray technicians
3) Coal
miner 4) Dyer and painter
Code:
a)
2
alone b) 1,2 and 3 c) 1,2 and 4 d) 1,3 and 4 Ans: (b)
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