The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be____kg
(a)
4 M
(b)
2 M
(c)
M/4
(d)
M
If the Earth shrinks to 50% of its real radius its mass remaining the same, the weight of a body on the Earth will
(a)
decrease by 50%
(b)
increase by 50%
(c)
decrease by 25%
(d)
increase by 300%
To project the rockets which of the following principle(s) is /(are) required?
(a)
Newton’s third law of motion
(b)
Newton’s law of gravitation
(c)
law of conservation of linear momentum
(d)
both a and c
The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in
(a)
A
(b)
B
(c)
C
(d)
D
A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce
(a)
a convergent beam of light
(b)
a divergent beam of light
(c)
a parallel beam of light
(d)
a coloured beam of light
Which of the following lens would you prefer to use while reading small letters found in a dictionary?
(a)
A convex lens of focal length 5 cm
(b)
A concave lens of focal length 5 cm
(c)
A convex lens of focal length 10 cm
(d)
A concave lens of focal length 10 cm
The value of universal gas constant
(a)
3.81 J mol–1 K–1
(b)
8.03 J mol–1 K–1
(c)
1.38 J mol–1 K–1
(d)
8.31 J mol–1 K–1
If a substance is heated or cooled, the linear expansion occurs along the axis of
(a)
X or –X
(b)
Y or –Y
(c)
both (a) and (b)
(d)
(a) or (b)
Temperature is the average ______ of the molecules of a substance
(a)
difference in K.E and P.E
(b)
sum of P.E and K.E
(c)
difference in T.E and P.E
(d)
difference in K.E and T.E
Which of the following is correct?
(a)
Rate of change of charge is electrical power
(b)
Rate of change of charge is current.
(c)
Rate of change of energy is current.
(d)
Rate of change of current is charge.
In a simple circuit, why does the bulb glow when you close the switch?
(a)
The switch produces electricity
(b)
Closing the switch completes the circuit.
(c)
Closing the switch breaks the circuit.
(d)
The bulb is getting charged.
Kilowatt hour is the unit of
(a)
resistivity
(b)
conductivity
(c)
electrical energy
(d)
electrical power
Velocity of sound in a gaseous medium is 330 ms-1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is
(a)
330 ms-1
(b)
660 ms-1
(c)
156 ms-1
(d)
990 ms-1
The velocity of sound in air at a particular temperature is 330 ms-1. What will be its value when temperature is doubled and the pressure is halved?
(a)
330 ms-1
(b)
165 ms-1
(c)
330 x \(\sqrt { 2 } \) ms-1
(d)
320/\(\sqrt { 2 } \)ms-1
Velocity of sound in the atmosphere of a planet is 500 ms-1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be
(a)
17 m
(b)
20 m
(c)
25 m
(d)
50 m
Man-made radioactivity is also known as ___________.
(a)
Induced radioactivity
(b)
Spontaneous radioactivity
(c)
Artificial radioactivity
(d)
a & c
Gamma radiations are dangerous because
(a)
it affects eyes & bones
(b)
it affects tissues
(c)
it produces genetic disorder
(d)
it produces enormous amount of heat
Kamini reactor is located at __________
(a)
Kalpakkam
(b)
Koodankulam
(c)
Mumbai
(d)
Rajasthan
In the nucleus of 20Ca40, there are
(a)
20 protons and 40 neutrons
(b)
20 protons and 20 neutrons
(c)
20 protons and 40 electrons
(d)
40 protons and 20 electrons
The gram molecular mass of oxygen molecule is
(a)
16 g
(b)
18 g
(c)
32 g
(d)
17 g
1 mole of any substance contains __________ molecules
(a)
6.023 × 1023
(b)
6.023 × 10-23
(c)
3.0115 × 1023
(d)
12.046 × 1023
The basis of modern periodic law is__________.
(a)
atomic number
(b)
atomic mass
(c)
isotopic mass
(d)
number of neutrons
_____ is a relative periodic property.
(a)
atomic radii
(b)
ionic radii
(c)
electron affinity
(d)
electronegativity
The process of coating the surface of metal with a thin layer of zinc is called______.
(a)
painting
(b)
thinning
(c)
galvanization
(d)
electroplating
A solution is a __________ mixture.
(a)
homogeneous
(b)
heterogeneous
(c)
homogeneous and heterogeneous
(d)
non homogeneous
Which of the following is the universal solvent?
(a)
Acetone
(b)
Benzene
(c)
Water
(d)
Alcohol
Which of the following is hygroscopic in nature?
(a)
ferric chloride
(b)
copper sulphate penta hydrate
(c)
silica gel
(d)
none of the above
H2(g) + Cl29(g) → 2HCl(g) is a
(a)
Decomposition Reaction
(b)
Combination Reaction
(c)
Single Displacement Reaction
(d)
Double Displacement Reaction
Which of the following is not an“element + element → compound” type reaction?
(a)
C(s) + O2(g) → CO2(g)
(b)
2K(s) + Br2(l) → 2KBr(s)
(c)
2CO(g) + O2(g) → 2CO2(g)
(d)
4Fe(s) + 3O2(g) → 2Fe2O3(s)
The pH of a solution is 3. Its [OH–] concentration is
(a)
1 × 10–3 M
(b)
3M
(c)
1 × 10–11 M
(d)
11 M
The secondary suffix used in IUPAC nomenclature of an aldehyde is ____
(a)
- ol
(b)
– oic acid
(c)
– al
(d)
- one
C2H5OH + 3O2 → 2CO2 + 3H2O is a
(a)
Reduction of ethanol
(b)
Combustion of ethanol
(c)
Oxidation of ethanoic acid
(d)
Oxidation of ethanal
Rectified spirit is an aqueous solution which contains about _______ of ethanol
(a)
95.5 %
(b)
75.5 %
(c)
55.5 %
(d)
45.5 %
The endarch condition is the characteristic feature of
(a)
root
(b)
stem
(c)
leaves
(d)
flower
Which is formed during anaerobic respiration
(a)
Carbohydrate
(b)
Ethyl alcohol
(c)
Acetyl CoA
(d)
Pyruvate
Kreb’s cycle takes place in
(a)
chloroplast
(b)
mitochondrial matrix
(c)
stomata
(d)
inner mitochondrial membrane
The segments of leech are known as
(a)
Metameres (somites)
(b)
Proglottids
(c)
Strobila
(d)
All the above
The body of leech has
(a)
23 segments
(b)
33 segments
(c)
38 segments
(d)
30 segments
The animals which give birth to young ones are
(a)
Oviparous
(b)
Viviparous
(c)
Ovoviviparous
(d)
All the above
Active transport involves
(a)
Movement of molecules from lower to higher concentrations
(b)
Expenditure of energy
(c)
It is an uphill task
(d)
All of the above
During transpiration there is loss of
(a)
Carbon dioxide
(b)
Oxygen
(c)
Water
(d)
None of the above
‘Heart to Heart’ is called
(a)
SA node
(b)
AV node
(c)
Purkinje fibres
(d)
Bundle of His
Bipolar neurons are found in
(a)
retina of eye
(b)
cerebral cortex
(c)
embryo
(d)
respiratory epithelium
The outer most of the three cranial meninges is
(a)
arachnoid membrane
(b)
piamater
(c)
duramater
(d)
myelin sheath
Vomiting centre is located in
(a)
medulla oblongata
(b)
stomach
(c)
cerebrum
(d)
hypothalamus
The hormone which has positive effect on apical dominance is:
(a)
Cytokinin
(b)
Auxin
(c)
Gibberellin
(d)
Ethylene
Avena coleoptile test was conducted by
(a)
Darwin
(b)
N. Smit
(c)
Paal
(d)
F.W. Went
To increase the sugar production in sugarcanes they are sprayed with _______
(a)
Auxin
(b)
Cytokinin
(c)
Gibberellins
(d)
Ethylene
The plant which propagates with the help of its leaves is ___________
(a)
Onion
(b)
Neem
(c)
Ginger
(d)
Bryophyllum
Syngamy results in the formation of____________
(a)
Zoospores
(b)
Conidia
(c)
Zygote
(d)
Chlamydospores
A single highly coiled tube where sperms are stored, get concentrated and mature is known as
(a)
Epididymis
(b)
Vasa efferentia
(c)
Vas deferens
(d)
Seminiferous tubules
9 : 3 : 3 : 1 ratio is due to
(a)
Segregation
(b)
Crossing over
(c)
Independent assortment
(d)
Recessiveness
The _____________ units form the backbone of the DNA.
(a)
5 Carbon sugar
(b)
Phosphate
(c)
Nitrogenous bases
(d)
Sugar phosphate
The number of chromosomes found in human beings are __________________.
(a)
22 pairs of autosomes and 1 pair of allosomes.
(b)
22 autosomes and 1 allosome
(c)
46 autosomes
(d)
46 pairs autosomes and 1 pair of allosomes.
Biogenetic law states that ___________
(a)
Ontogeny and phylogeny go together
(b)
Ontogeny recapitulates phylogeny
(c)
Phylogeny recapitulates ontogeny
(d)
There is no relationship between phylogeny and ontogeny
The ‘use and disuse theory’ was proposed by __________.
(a)
Charles Darwin
(b)
Ernst Haeckel
(c)
Jean Baptiste Lamarck
(d)
Gregor Mendel
Paleontologists deal with
(a)
Embryological evidences
(b)
Fossil evidences
(c)
Vestigial organ evidences
(d)
All the above
Which of the following is used to produce products useful to humans by biotechnology techniques?
(a)
enzyme from organism
(b)
live organism
(c)
vitamins
(d)
both (a) and (b)
We can cut the DNA with the help of
(a)
scissors
(b)
restriction endonucleases
(c)
knife
(d)
RNAase
In a hexaploid wheat( 2n = 6 x = 42 ) the haploid (n) and the basic(x) number of chromosomes respectively are
(a)
n = 7 and x = 21
(b)
n = 21 and x = 21
(c)
n = 7 and x = 7
(d)
n = 21 and x = 7
Excessive consumption of alcohol leads to
(a)
Loss of memory
(b)
Cirrhosis of liver
(c)
State of hallucination
(d)
Supression of brain function
Cancer of the epithelial cells is called
(a)
Leukemia
(b)
Sarcoma
(c)
Carcinoma
(d)
Lipoma
Where does alcohol effect immediately after drinking?
(a)
eyes
(b)
auditory region
(c)
liver
(d)
central nervous system
Soil erosion is more where there is
(a)
no rain fall
(b)
low rainfal
(c)
rain fall is high
(d)
none of these
Common energy source in village is
(a)
electricity
(b)
coal
(c)
biogas
(d)
wood and animal dung
Which of the following statement is wrong with respect to wind energy
(a)
wind energy is a renewable energy
(b)
the blades of wind mill are operated with the help of electric motor
(c)
production of wind energy is pollution free
(d)
usage of wind energy can reduce the consumption of fossil fuels.
All files are stored in the _____________
(a)
Folder
(b)
box
(c)
Pai
(d)
scanner
Which is used to build scripts?
(a)
Script area
(b)
Block palette
(c)
stage
(d)
sprite
Which is used to edit programs?
(a)
Inkscape
(b)
script editor
(c)
stage
(d)
sprite
Part B
44 x 1 = 44
Passengers lean forward when sudden brake is applied in a moving vehicle. This can be explained by ___________
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inertia of motion
___________ is used to change the speed of car.
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Acceleration
The path of the light is called as_____________
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ray of light
Amount of light entering into the eye is controlled by________
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Iris
The value of Avogadro number ________
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6.023 x 1023 / mol
According to Boyle’s law, the shape of the graph between pressure and reciprocal of volume is ______.
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straight line
When a circuit is open, _____________ cannot pass through it.
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current
The ratio of the potential difference to the current is known as ________.
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resistance
A whistle giving out a sound of frequency 450 Hz, approaches a stationary observer at a speed of 33 ms–1. The frequency heard by the observer is (speed of sound = 330 ms–1) ______.
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500 Hz
A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is ___________.
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2067 Hz
The average energy released in each fusion reaction is about ________ J.
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3.84 x 10-12 J
If the radiation exposure is 100 R, it may cause ______________.
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Leukemia
Atoms of different elements having _______ mass number, but ________ atomic numbers are called isobars.
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same, different
Relative atomic mass is otherwise known as __________
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standard atomic weight
The scientist who propounded the modern periodic law is ________.
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Hendry Moseley
________ and ________ are called inner transition elements
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Lanthanides, Actinides
Solubility is the amount of solute dissolved in _____ g of solvent.
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100
Volume persentage decreases with increases in temperature because _____.
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of expansion of liquids
Electrolysis is type of _______________ reaction
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decomposition
The number of products formed in a synthesis reaction is _________
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