Science and Technology Part One
Class 10 Science 1
Que 1: Choose the correct
option in the multiple choice answer for the following questions:- ( 1 mark
each)
1) A ……. Is necessary
to change the speed as well as the direction of motion of an object.
a) force b) inertia c) momentum d) motion
Ans: force
2) The orbit of a planet revolving
around a star is ……
a) circular b) linear c) towards the focal
point d) elliptical
Ans: elliptical
3)The square of its period of
revolution around the sun is directly proportional to the ……….. of the mean
distance of a planet from the sun.
a) square b) square root c) cube d) cube root
Ans
:cube
4) The gravitational force between two bodies
is directly proportional to the product of the masses of those bodies and is
……….of the distance between them.
a) inversely proportional to the square
b) directly proportional to the square
c) inversely proportional to the cube
d) inversely proportional to the square root
Ans:
inversely proportional to the square
5) The value of universal gravitational
constant (G) in SI unit is…………
a) 6.673× 10 -11 Nm 2/ kg 2 b) 6.673× 10 11 Nm/ kg
c) 9.673 × 10 -11 Nm/ kg d) 9.673 × 10 -11 Nm 2/ kg 2
Ans: 6.673× 10 -11 Nm 2/ kg 2
6) The ……………..force is much weaker
than other forces in nature.
a) gravitational b) electromagnetic c) nuclear
force d) inter molecular
Ans: gravitational
7) The value of gravitational
acceleration (g) is ………..
a) highest at the poles
b) highest at the equator
c) same everywhere on the surface of
the earth
d) lowest at the poles
Ans: highest at the poles
8) The value of gravitational acceleration(g)
is …………at the equator.
a) 9.78 m/s 2 b) 9.832 m/s 2 c)
9.8 m/s 2 d) 6.67 m/s 2
Ans: 9.78 m/s 2
9) The free fall of an object is
possible only in…….
a) air b) vacuum c) on the surface of earth d) None of these
Ans: vacuum
10) The weight of any object on the moon is
nearly …………of the weight of the earth.
a) 1/6 b) 1/8 c)
½ d) 2/6
Ans:
1/6
11) A person weighs 60N on earth. His
weight on the moon will be……
a)360N
b) 60N c) 6N d) 10N
Ans
: 10N
12) Dobereiner laid down the…..rule.
a) periodic
b)modern periodic c) triad d)octaves
Ans
: triad
13)Newlands’ Law of Octaves is
applicable upto…..
a) oxygen b) calcium c) cobalt d) potassium
Ans:
calcium
14) X and Y are two elements having
similar properties which obey Newlands’s Law of Octaves. The minimum and
maximum number of elements in between X and Y respectively are……
a) 6 and 8 b) 7 and 15 c)
8 and 14 d) 6 and 13
Ans:
6 and 13
15)At the time of Mendeleev
…..elements were known.
a) 56 b)
65 c) 63 d) 118
Ans:
63
16)In Mendeleev’s periodic table eka-
silicon was later named as……..
a) Scandium b) Gallium c) Germanium d) Thorium
Ans: Germanium
17)In Modern Periodic Table the
number of columns and periods are respectively …….and …….
a) 16,7
b) 6,16 c) 18,7 d)18,6
Ans:
18, 7
18)…….is the outermost shell for
elements of period 2.
a)K b)
L c) M d) N
Ans: L
19)The groups 1 and 2 constitute
the………block.
a) s b)
p c) d d) d
Ans: s
20)Which pair of atomic numbers represents
elements in the same group ? a) 11,19 b) 6,12 c) 4,16
d) 8,17
Ans: 11,19
21)which among the following elements
would lose an electron easily ?
a) Mg
b) Na c) Al d) Cl
Ans:
Na
22)Which among the following is the
largest element?
a) Na b)Mg c) K d)Ca
Ans: K
23) Arrange the following elements in
order of their decreasing metallic character. Na, Si, Cl, Mg, Al
a) Cl > Si > Al > Mg > Na b) Na > Mg > Al
> Si > Cl
c) Na > Al > Mg > Cl > Si d) Al > Na > Si
> Ca > Mg
Ans:
Na > Mg > Al > Si > Cl
24)Which one of the following does not
increase while moving down the group of the Modern periodic table
a) Atomic radius b) Metallic character
c) Valency
d) Number of shells
Ans
: Valency
25) On moving from left to right in a
periodic table, the size of the atom……. a) increases b) decreases
c) decreases first and then increases d) does not change
Ans:
decreases
26)Which of the following statements about the
Modern periodic table is correct ?
a) 18 horizontal rows are known as
Periods.
b) 7 vertical columns are known as Periods.
c) 18 vertical columns are known as
groups.
d) 7 horizontal rows are known as Periods.
Ans:
18 vertical columns are known as groups.
27) The d-block elements are called
as………elements.
a) Transition b)
Metalloid c) Normal
d) Inner transition
Ans: Transition
28)The size of an atom is indicated by its……..
a) atomic number b)
Atomic radius c)
number of shells d) atomic mass
Ans
: Atomic radius
29)……..is the distance between the
nucleus of the atom and its outermost shell.
a) Atomic radius b)
Atomic diameter c) atomic mass d)
atomic size
Ans
: Atomic radius
30) Atomic radius is expressed in the unit …..
a) nanometer b) picometer c) micrometer d) millimeter
Ans : picometer
31)The tendency of an element to form
cation is the ………. character of that element.
a) non metallic b) basic c) metallic d) acidic
Ans
: metallic
32)………… is in liquid form in the
halogen family.
a) Fluorine b) Chlorine c) Bromine d) Iodine
Ans
: Bromine
33)While going from top to bottom in
a group the atomic radius………
a) increases b) decreases
c)
remains same d) No change occurs
Ans
: increases
34) The tendency of an element to form anion
is the ………. character of that element.
a) non metallic b) basic
c) metallic d)
acidic
Ans
non metallic
35)The elements from the zero group are
called…..
a) alkali metals b) alkaline earth metals c) halogen d) noble gases
Ans
: noble gases
36)Writing a chemical reaction in
brief by using chemical formulae is called as…….
a) chemical change b) chemical symbol c) chemical equation d) chemical reaction
Ans
: chemical equation
37)When the positive charge on an ion
increases or the negative charge on them decreases it is called as…………..
a) reduction b)
corrosion c) oxidation d) decomposition
Ans
: oxidation
38) The chemical reaction in which
two or more products are formed from a single reactant is called
…………..reaction.
a) decomposition b)
combination
c) displacement d)
double displacement
Ans
: decomposition
39) In the chemical equation the ……………..are
written on the left hand side .
a) products b) reactants c)
element d) catalyst
Ans
: reactants
40) Aqueous solution of ZnSO4 is added into
the aqueous solution of BaCl2 , this is the example of ……reaction.
a) displacement b) double displacement c) redox d) reduction.
Ans
: double displacement
41)The unit of electrical power is ….
a) Volt
b) Watt c) Joule d) Ampere
Ans
: Watt
42)The ‘live’ and the ‘neutral’ wires
have potential difference of ……
a) 110 V b) 202V c) 201 V d)
220 V
Ans
: ) 220 V
43) In an electric bulb coil of …………..metal is
used.
a) copper b)
Tungsten c) aluminium d) iron
Ans
: Tungsten
44) The electricity bill specifies the usage
in ………..
a) kilowatt
b) Joule c)
Volt d) Unit
Ans
: Unit
45) The frequency of AC is ………….Hz
a) 20Hz b)
50Hz c) 25Hz
d)75Hz
Ans
: 50Hz
46) These days when current in the
circuit suddenly increases……..switches are used.
a) MCA b)
MCC c) MCD d) MCB
Ans:
MCB
47) A coil of an alloy……………..is used
in electric heater cooker as a resistor.
a) Stainless steel b) Nichrome
c) Copper d) Bronze
Ans:
Nichrome
48) The right hand thumb rule is also called
…………….rule.
a) Newton’s law of motion b) Newland’s law of Octave
c) Mendeleev’s periodic law d) Maxwell’s cork- screw
Ans :Maxwell’s cork- screw
49)…………….is used for electrical measurements.
a) Thermometer b) Galvanometer c)
Voltmeter d) Electric meter
Ans:
Galvanometer
50)Which of the following scientist invented
the rule of electromagnetic induction?
a) Newton
b) Kepler c)
Mendeleev d) Michael Faraday
Ans:
Michael Faraday
51) Which of the following substance
contracts on heating?
a)Lukewarm water b)
Ice c) Iron d) Mercury
Ans:
Ice
52)If pressure increases the melting point of
a substance ………..
a) does not change b) decreases c)
increases d) remains constant
Ans:
decreases
53) The vapour content in the air is measured
by ……….
a) relative humidity b) dew point
c) absolute humidity d) none of these
Ans:
absolute humidity
54)Humid and dry nature of air depends on
the………
a) amount of vapor in the air b)
amount of vapor to make the air saturated
c) temperature of the air d) volume of the air e) all the above
Ans:
All the above
55) Vapors in air condenses to form……..
a) fog b) snowfall c) rainfall d) All the above
Ans:
All the above
56) When the temperature of water
decreases below 4 0C it’s volume…..
a) decreases b)
increases c) remains same d)
none of these
Ans:
increases
57) In a region with a cold climate the
aquatic animals can survive at 4 0C, because……..
a) Ice floating on water is insulator
b) the heat from water cannot
transfer to the atmosphere
c) anomalous behaviour of water d) all the above
Ans:
all the above
58) From the options given below the
specific heat of…………is maximum.
a) copper b) silver c)
iron d) mercury
Ans
: iron
59) Ice-ball is prepared from
shredded ice again.This is the example of ……
a) melting b) condensation c) regelation d) freezing
Ans:
regelation
60) The SI unit of specific heat is …………….
a) Kcal b) Cal
c)
Cal/g 0 c d) J/Kg 0 c
Ans: J/Kg 0 c
61) ………………….apparatus is used to
study the anomalous behaviour of water.
a) calorimeter b)Joul’s apparatus
c) Hope’s apparatus d) Thermos flask
Ans:Hope’s
apparatus
62) …………heat is necessary to raise 1
Kg of water from 14.5 0 c to 15.5 0 C.
a) 4180 Joul b)1 KJoul c) calorie d) 4180 calorie
Ans: 4180 Joul
63) due to …………………..pencil looks bent
in water in the given experiment.
a) refraction of light b) dispersion of
light c) internal reflection of light d) reflection of light
Ans:
refraction of light
64) In the following diagram if ∠ i =40, then ∠ e =... ?
a) 50 b) 40 c) 60
d) 90
Ans: 40
65)
A ray of light strikes the glass slab at an angle 40 0 with the surface
of the slab. Then the angle of incidence will be………. 0
a) 50
b) 40 c) 60 d) 90
Ans
:50
66)We see the sun even after it goes below the
horizon, because…..
a) refraction of light b) dispersion of light
c) partial reflection of light d) reflection of light
Ans:
refraction of light
67)…………this is the unit of refractive index.
a) cm b)
m c) degree
d) refractive index has no unit
Ans:
refractive index has no unit
68) n =……………this law is also called as Snell’s
law.
a) 𝑠𝑖𝑛𝑟/ 𝑠𝑖𝑛 𝑖 b) 𝑠𝑖𝑛 𝑟/ 𝑠𝑖𝑛𝑒
c) sin𝑠𝑖𝑛 𝑒 /sin𝑠𝑖𝑛 𝑟 d) sin sin i/sin sin e
Ans:
69)Lights of different colours are used ad
signal for safety transport .From these the wavelength of red light is………nm.
a) 400
b)500 c) 600 d) 700
Ans: 700
70)If the refractive index of air
with respect to glass is 2/3 .What is the refractive index of glass with
respect to air ?
a) 2/3 b)
3/2 c) 1/3 d) ½
Ans:
3/2
71) The process of separation of
light into its component colours while passing through a medium is called
……………….
a) reflection of light
b) refraction of light
c) dispersion of light d) absorption of light
Ans:
dispersion of light
72)Light changes its direction when
going from one transparent medium to another transparent medium.This is called
………………
a) reflection of light b) refraction of light
c) dispersion of light d) absorption of light
Ans: refraction of light
73)A ray of light gets refracted
…………while entering the lens.
a) once
b)twice c) thrice d) doesn’t happen
Ans:
once
74)The point inside the lens on the
principal axis through which light rays pass without changing their path is
called ………………
a) centre of curvature b)
optical centre
c) principal focus d) axiom point
Ans:
optical centre
75) Virtual image is formed if an
object is placed …………..
a)at infinity b) at 2F1
c) at focus F1 d) between F1 and
O
Ans: between F1 and O
76) In the convex lens if an object
is placed at 2F1, the image is formed at………
a) F1
b) 2F1 c) beyond 2F1
d) On the same side of the lens as the object
Ans:
2F1
77)All distances parallel to the
principal axis are measured from the……
a) optical centre b) centre of curvature
c) principal focus d) infinity
Ans: optical centre
78)A small hole of changing diameter
at the centre if Iris is called ……..
a) optic nerves b)
cornea c)optic
disc d)
pupil
Ans:
pupil
79)For a normal human eye the near point is
at………
Ans:
a) 2.1cm b)2.5cm c)25cm d)5cm
Ans:
25cm
80)The image formed by ……. lens is
always virtual and small.
a) plane convex b) biconvex c)
biconcave d)
bifocal
Ans:
biconcave
81)In a relaxed state , the focal length of
healthy eyes is ……..
a) 2cm b)
2.5cm c) 25cm d) 5cm
Ans:
2cm
82)For a specific glass lens f=0.5 .This is
the only Information given to the student. Which type of lens is given to him
and what is its power?
a) power 2D ; convex lens b) power 1D ; concave lens
c) power -0.5; concave lens d) power -0.25 D ; convex lens
Ans: power 2D ; convex lens
83) In Myopia the human eye….
a)
cannot see nearby objects distinctly
b)cannot see distant objects clearly
c) cannot see nearby as well as distant
objects clearly
d) can see nearby as well as distant objects
clearly
Ans: cannot see distant objects clearly
84) Due to elongation of………….and increase in
curvature of the eye lens, a person cannot see distant objects clearly.
a) eyeball b) pupil c) eyelid d) cornea
Ans:
eyeball
85) In hypermetropia human eye ………..
a) can see distant objects clearly
b) can
see nearby objects distinctly
c)
cannot see nearby as well as distant objects clearly
d) cant see nearby as well as distant objects clearly
Ans:
can see distant objects
clearly
86) Bifocal lens is required to correct
……………defect.
a) myopia
b) hypermetropia c) presbyopia
d) none of these
Ans: presbyopia
87} ……. times larger images can be obtained by
using a simple microscope.
a) 5
b) 10 c) 20 d) 60
Ans:
20
88) ………… is a combination of two convex lenses
with small focal length. a)simple microscope b)
compound microscope c) telescope d) none of these
Ans:
compound microscope
89) Bronze is an alloy of…….
a) copper and tin b)
copper and zinc
c) copper and iron d)
iron and nickel
Ans: copper and tin
90)……………..is an alloy made from iron,
nickel and chromium.
a) brass b) bronze
c) stainless steel d)
amalgam
Ans:
stainless steel
91) …………….is basic oxide .
a) CO2
b) K2O c) SO2 d) Al2O3
Ans:
K2O
92)In electrolytic reduction of alumina
……………is used as a cathode.
a) sulphur b)
graphite c) platinum d) aluminium
Ans:
graphite
93) Iron is…….
a) more reactive than zinc b) more reactive than aluminium
c) less reactive than copper d) less reactive than aluminium
Ans:
less reactive than
aluminium
94)If Cu, Fe, Zn, Al elements are
arranged in increasing order of their reactivity Then the correct order would
be which of the following?
a) Cu, Fe, Zn, Al b) Al, Cu, Fe, Zn c) Zn, Al, Cu, Fe d) Fe, Zn, Al, Cu
Ans:
Cu, Fe, Zn, Al
95) Which of the following method is
used to prevent the accumulation of greenish layer on brass due to corrosion
a) electroplating b) anodization c)
tinning d) alloying
Ans: tinning
96)In Wilfley table method to separate
particles of gangue ……….method is used.
a) Magnetic b) Froth floatation c) Leaching d) gravitation
Ans: gravitation
97)Aluminium oxide is ……….oxide .
a) acidic b ) basic c)
neutral d) amphoteric
Ans:
amphoteric
98)Atomic number of aluminium is …
and its electronic configuration is……………
a) 13, ( 2, 8, 3) b) 12 ( 2, 8, 2)
c) 13, (3, 10) d) 12, (2, 10)
Ans:
13, ( 2, 8, 3)
99) The chemical formula of zinc
blend is…..
a) ZnSO4
b) ZnS c) ZnCO3 d) ZnO
Ans: ZnS
100)Extraction of moderately reactive
elements is done by …… and …….. method.
a)roasting and calcination b) roasting and reduction
c) separation and calcination d)none of these
Ans:
roasting and calcination
101)Corrosion of silver causes a black layer
of …………
a)Silver nitrate b) silver oxide
c) silver sulphide d) silver carbonate
Ans:
silver sulphide
102)To prevent corrosion of iron and steel …….
method is used .
a) electroplating b) anodization
c) tinning d) galvanizing
Ans:
galvanizing
103) In preparation of Aqua regia
hydrochloric acid and………….acid are mixed.
a) sulphuric acid b)
nitric acid
c) carbonic acid d) phosphoric acid
Ans:
nitric acid
104)The sound of one metal colliding
with another makes a noise, this property is called as ……
a) good conductors b) ductility
c) sonority d)
malleability
Ans:
sonority
105) ………… exist in a liquid state at room
temperature.
a) Chlorine b)
Bromine
c) Iodine d) Fluorine
Ans:
Bromine
106)Ionic compounds are electrically
…………..
a) positively charged b) negatively charged
c) neutral d) conductor
Ans:
neutral
107) ………..is good conductor of heat but bad
conductor of electricity.
a) graphite b) diamond c)coal d) iodine
Ans:
diamond
108)………is the least reactive metal.
a) silver b) sodium
c) zinc d) gold
Ans:
gold
109)………. forms a green colour in the
water.
a) CuSO4 b) FeSO4 c) NaCl d) all the above
Ans:
FeSO4
110)Tin is an alloy of ……….
a) copper b) tin c)
zinc d) silver e) non of these
Ans:
non of these
111) When one of the metals in an alloy is
mercury the alloy is called……….. a) amalgam b) sodium amalgam
c) zinc amalgam d) all the above
Ans:
amalgam
112) The minerals from which the metal can be
separated economically are called ………
a) minerals
b) ores c)
gangue d) alloy
Ans:
ores
113)Generally the melting and boiling
point of carbon compounds are found to be less than …….. 0 c
a) 300
b) 100 c) 200 d)150
Ans:
300
114) Number of valence electrons in a
carbon atom is…….
a) 4 b)
5 c) 1 d) 3
Ans:
4
115)The bond between two oxygen atoms is
…………bond .
a) double
b) triple c) single d) none of these
Ans:
double
116)The molecule mass of a carbon
compound is spread over a range of ….. a)10 12
b) 10 14 c) 10 10 d) 10 13
Ans:
10 12
117)The unsaturated hydrocarbons containing a
carbon- carbon double bond are called….
a) Alkenes b)
Alkanes c) Alkynes d) Alcohol
Ans:
Alkenes
118) The unsaturated hydrocarbons whose
structures contain a carbon -carbon triple bond are called ……..
a) Alkenes b) Alkanes c)
Alkynes d) Alcohol
Ans: Alkynes
119)The phenomenon in which compounds having
different structural formulae have the same molecular formula is called …………
a) structural isomerism b) catenation
c)homologous d) functional group
Ans:
structural isomerism
120) From the following hydrocarbon ………………is
the cyclic hydrocarbon. a) isobutene b)
propyne c) benzene d) isobutylene
Ans:
benzene
121) While going in an increasing order of the
length there is a rise in the molecular mass of the members by…….
a) 14 u b) 15u c)
16 u d) 17u
Ans:
14 u
122) The general molecular formula
for the homologous series of alkynes is ……….
a) CnH2n
b)CnH2n + 2 c) CnH2n - 2 d) CnH2n – 1
Ans:
CnH2n - 2
123) …….is one of the combustible
components of L.P.G.
a) Methane b) Ethane c)
Propane d) Butane
e) Both c and d
Ans:
Both c and d
124)At room temperature ethanol is ……
a)solid b)
gas c) plasma d) liquid
Ans:
liquid
125)Generally ……is called spirit.
a) methanol b) ethanol
c) propanol d) butanol
Ans:
ethanol
126)Due to……….. we can gather
information about worldwide events sitting at home.
a) worldwide web b) internet
c) artificial satellite d) natural satellite
Ans:
internet
127) The first person to step on the
moon is ……..
a) Neil Armstrong b) Rakesh Sharma
c) Kalpana Chawla d) Sunita Williams
Ans:
Neil Armstrong
128)The first artificial satellite ……was sent to
space by Soviet Union in 1957. a) Apollo
b) Chandrayaan c)
Sputnik d) Luna 2
Ans:
Sputnik
129)If a spacecraft is to be sent to
travel to outer space.it must have minimum velocity of ………
a) 11.2 km/s b)11.6km/s
c)13.2km/s d)1.4m/s
Ans:
11.2 km/s
130) A group of students from COEP Pune sent a
small satellite …….. through ISRO in 2016.
a) Luna 6 b) Apollo 6 c)
Swayam d) Param
Ans:
Swayam
131)The astronomical object closest to us is
the ………
a) Moon b) Mars c)
Saturn d) Mercury
Ans:
Moon