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WorksheetsPhysics Quiz
Total questions: 122
Worksheet time: 2hrs 2mins
A system consist of six identical particles each of mass m located on the vertices of a regular hexagon of side length a. The gravitational field at centre of hexagon is
Zero
GM/a^2
6GM/a^2
2GM/a^2
The time period of an earth’s satellite in circular orbit is independent of
Mass of satellite
Mass of earth and radius of orbit of satellite
Mass of earth
Mass of satellite and radius of orbit of satellite
Two wires A and B of diameter of cross section 0.5 cm each are loaded as shown in figure. The unloaded length of wire A is 3 m and that of wire B is 2 m. If Young’s Modulus of both wires is same, then the ratio of elongation of wire A to the wire B will be
2 : 1
3 : 2
4 : 1
3 : 1
If P, Q and R represents bulk modulus of elasticity for solid, liquid and gas respectively, then
P = Q = R
P < Q < R
P > Q > R
P < Q = R
Young’s modulus of perfectly rigid material is
Zero
Infinity
2 × 10^5 N/m^2
10 × 10^6 N/m^2
If T is surface tension of a liquid, then the energy needed to break a liquid drop of radius R into 27 equal drops is
3πR^2T
27πR^2T
9πR^2T
8πR^2T
The level of water in a tank is 20 m high which has a hole of area 2 cm^2 at its bottom. The rate of leakage of water from the hole at this instant is (g = 10 m/s^2)
10^(-3) m^3/s
4 × 10^(-3) m^3/s
2 × 10^(-3) m^3/s
4 × 10^(-2) m^3/s
At what height over the Earth’s pole, the free fall acceleration decreases by one percent? (Radius of earth = 6400 km)
h = 16 km
h = 32 km
h = 64 km
h = 128 km
A ball is thrown vertically upwards from the ground. It crosses a point at height of 60 m twice at an interval of 4 s. The velocity with which ball will hit the ground is
40 m/s
20 m/s
30 m/s
15 m/s
A particle has initial velocity and has acceleration . Its speed after 10 s is
A : Bus has more inertia as compared to car. R : Mass is the measure of inertia.
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
A person standing on an escalator takes time 30 s to reach the top of a tower when the escalator is moving. He takes time 60 s to reach the top of tower when the escalator is at rest and he is walking up. The time taken by him when he walks up on a moving escalator is
30 s
15 s
90 s
20 s
A projectile is launched at time t = 0 with velocity 20 m/s at an angle 53° with the horizontal. The magnitude of velocity of the projectile at the highest point of the trajectory is
9 m/s
16 m/s
12 m/s
7 m/s
Three blocks of masses 2 kg, 3 kg and 5 kg are connected with massless string and placed on frictionless surface as shown in figure. If system is pulled by force F, then the ratio of T1 and T2 is
2 : 3
3 : 5
2 : 5
8 : 5
A : The mass of the body is irrelevant in kinematics of body under free fall. R : The acceleration of the body is independent of its mass in case of free fall.
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
When pressure on a metal cube is increased by 10^6 Pa, if volume decreased by 0.030% then the bulk modulus of the metal is (in N/m^2)
3.3 × 10^11
3.3 × 10^9
6.67 × 10^9
3.3 × 10^10
Two stars each of mass M = 10^30 kg are approaching each other with negligible speed, when far off. What is the speed with which they will collide if radius of each star is 10^6 m?
5.77 × 10^3 m/s
5.77 × 10^6 m/s
2.55 × 10^6 m/s
3.44 × 10^6 m/s
Assuming earth to be sphere of uniform mass density. At what distance from the centre of earth inside, a body weight will be of its weight at earth's surface? (R = radius of earth)
A : In a river flowing from East to West, a swimmer can reach exactly opposite on north bank of river, if he follows correct angle towards East while trying to reach north side of river. R : The component of his velocity with respect to river towards east will be cancelled by the river velocity to help him reach exact north if correct angle is used.
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
A : An object falling from a greater height reaches a steady terminal velocity. R : At a steady velocity, the viscous drag due to air is just equal to its weight (Take buoyancy negligible).
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
Two trains P and Q are moving with velocities vP and vQ, respectively along the positive x-axis. If vP < vQ, then which of the following position-time graph is correctly showing the velocity of trains P and Q?
(1)
(2)
(3)
(4)
A metal rope of density 5000 kg/m3 has a breaking stress 9.8 × 10^8 N/m2. If the radius of the rope is doubled, then the new breaking stress will be
(1) 39.2 × 10^8 N/m2
(2) 9.8 × 10^8 N/m2
(3) 6 × 10^8 N/m2
(4) 16 × 10^8 N/m2
A machine gun fires n bullets per second with speed u, mass of each bullet is m. If bullets hit the wall and get embedded in it, then force acting on the wall is
(1) mnu
(2) 2mnu
(3)
(4) 4mnu
If a planet of mass ‘m’ is revolving around the sun in a circular orbit of radius ‘2r’ with time period T, then mass of the sun is
(1)
(2)
(3)
(4)
With what minimum acceleration can a fireman slide down a rope, whose breaking strength is th of his weight? [g = 10 m/s2]
(1) 4 m/s2
(2) 10 m/s2
(3) 8 m/s2
(4) 6 m/s2
An iceberg of density 900 kg/m3 is floating in water of density 1000 kg/m3 the percentage of volume of ice-cube outside the water is
(1) 20%
(2) 35%
(3) 10%
(4) 25%
Find contact force between blocks
(1) 20 N
(2) 40 N
(3) 60 N
(4) 50 N
In uniform circular motion, which of the following quantity remains constant?
(1) Linear momentum
(2) Velocity
(3) Kinetic energy
(4) Acceleration
Which of the following is correct graph for a sphere falling in a viscous liquid? (at t = 0, velocity v = 0)
(1)
(2)
(3)
(4)
If a ball is thrown vertically upwards with speed 40 m/s, the distance covered during the last second of its descent will be (g = 10 m/s2)
(1) 70 m
(2) 90 m
(3) 35 m
(4) 125 m
A particle is moving in a circular path of radius r with constant speed v as shown in the figure. Average acceleration of particle during its motion from A to B is
(1)
(2)
(3)
(4)
For a satellite to appear stationary to an observer on earth, which of the following is false?
(1) Its sense of rotation must be from west to east
(2) It must be rotating about the Earth’s axis
(3) It must be rotating in the Equatorial plane
(4) Its time period must be 84.6 min
Two bodies A and B of mass 5 kg and 10 kg in contact with each other rest on a table against a rigid wall. The coefficient of friction between the bodies and the table is 0.2. When the force of 200 N is applied horizontally on A, which of the following is correct? (g = 10 ms–2)
(1) The reaction of wall is 200 N
(2) The action reaction force between A and B is more than reaction of wall
(3) The action reaction force between A and B is less than reaction of wall
(4) Both (A) and (C) are correct
On increasing temperature, the viscosity of
A. Gas decreases
B. Gas increases
C. Liquid decreases
D. Liquid increases
Consider a U-tube with liquids filled inside, as shown in the figure. If the system is at rest, then the value of ‘h’ will be approximately (ρoil = 0.8 g/cc, ρmercury = 13.6 g/cc and ρglycerol = 1.3 g/cc)
(1) 12.8 cm
(2) 20.8 cm
(3) 7.3 cm
(4) 24.1 cm
A particle is moving on circular path with decreasing speed, then the angle between velocity vector and acceleration vector is
(1) θ >
(2)
(3)
(4)
A wooden ball of density 900 kg/m3 is immersed in water to a depth 18 cm below the surface of water and then released. Upto what height will the ball jump out of water?
(1) 2 cm
(2) 9 cm
(3) 18 cm
(4) 4 cm
A particle is moving on straight line x'x with constant velocity 20 m/s. An observer B is sitting at perpendicular distance 50 m from x'x. The angular velocity of particle A w.r.t B at the instant θ = 45° is
(1) 0.1 rad/s
(2) 0.2 rad/s
(3) 0.4 rad/s
(4) 0.5 rad/s
In a hydraulic lift as shown in figure, mass of the car is m = 1000 kg, area of pistons A1 = 20 cm2, A2 = 5 m2. The minimum force F required to lift the car is g = 10 m/s2
(1) 8 N
(2) 4 N
(3) 6 N
(4) 1 N
The position of a particle varies with the time t as x = (7 + 5t – t2) m. Its acceleration – time graph is best represented as
(1)
(2)
(3)
(4)
A silver coin weighing 2.4 g is dissolved in excess HNO3 and then further treated with HCl solution in excess. The weight of AgCl formed is 2.87 g. The percentage of silver in the coin is (Atomic weight of Ag = 108, Cl = 35.5)
(1) 85%
(2) 88%
(3) 92%
(4) 90%
Conjugate acid and conjugate base of respectively are
(1) H2C2O4 and CO2
(2) and H2CO3
(3) CO2 and
(4) H2CO3 and
Which one of the following is not correct according to postulates of Bohr's atomic model?
(1) Energy of the electron only changes when it makes a transition from one energy level to the other
(2) An electron around the nucleus can revolve only in certain circular path of fixed radii and energy
(3) Angular momentum of an electron is quantized
(4) An electron moves in an orbit with continuous loss of energy
A 10 W bulb emits 400 nm radiation, the rate of emission of photons is (h = 6.626 ×10–34 Js)
(1) 2 × 10^12
(2) 5 × 10^15
(3) 5 × 10^17
(4) 2 × 10^19
Which of the following set of quantum number is not possible?
(1)
(2)
(3)
(4)
If the mole fraction of acetone in ethanol is 0.2 then molality of acetone in ethanol will be
(1) 5.4 m
(2) 6.8 m
(3) 4.5 m
(4) 7.2 m
The wave number for the shortest wavelength transition in Paschen series of Li2+ ion is (R: 109677 cm–1)
(1) 27420 cm–1
(2) 164515 cm–1
(3) 219354 cm–1
(4) 109677 cm–1
Consider the following reaction at equilibrium 2NO(g) + O2(g) ⇌ 2NO2(g) If helium is introduced at constant pressure then
(1) Formation of NO2 will increase
(2) Equilibrium constant of the reaction will change
(3) Dissociation of NO2 will increase
(4) There is no effect on equilibrium
From 44 mg CO2, 10^20 molecules are removed calculate the moles of CO2 left (Use NA = 6 × 10^23)
(1) 4.25 × 10–4
(2) 8.3 × 10–4
(3) 1.6 × 10–2
(4) 4.4 × 10–2
Maximum number of visible lines when an electron returns from 6th orbit to ground state in H spectrum will be
(1) 5
(2) 4
(3) 6
(4) 3
20.0 g of an impure sample of calcium carbonate decomposes on heating to give 8.4 g calcium oxide. What is the percentage purity of calcium carbonate sample? (At. Wt. : Ca = 40)
(1) 50
(2) 75
(3) 85
(4) 95
At equilibrium PCl5(g) dissociates 50%, then the value of (P + Kp) is (where P = total pressure at equilibrium)
(1) 2P
(2) 4P
(3) P
(4)
The pKa of a weak acid HX and pKb of a weak base BOH are 4.76 and 4.75 respectively. The pH of the solution of salt BX will be
(1) 8.005
(2) 7.32
(3) 7.005
(4) 6.008
Find out the correct statement(s) about moseley's work leading to modern periodic law.
(1) Atomic number is more fundamental property than atomic mass
(2) All of these
(3)
(4) where Z is atomic no. v is frequency of emitted x-rays
If uncertainty in position and momentum of a moving particle is equal then uncertainty in its velocity will be
(1)
(2)
(3)
(4)
Which of the following salt undergoes cationic hydrolysis?
(1) NH4Cl
(2) NaHCO3
(3) NaNO3
(4) NaCN
Which of the following salt undergoes cationic hydrolysis?
NH4Cl
NaHCO3
NaNO3
NaCN
Which one of the following statements is correct regarding following graph?
The graph is for 2s orbital
There are two radial nodes
There are three spherical nodes
Both (1) & (2)
Number of significant figures in 100 pens is
1
2
3
∞
In which of the following the order of arrangement does not agree with the variation of property indicated against it?
O < Te < Se < S (Electron affinity)
In < Ga < Tl < B (First ionisation enthalpy)
Si < Be < Mg < Na (Metallic nature)
H– < F– < Cl– < Br– (Ionic radii)
Number of radial and angular nodes present in 4d orbitals respectively are
2 and 2
2 and 1
1 and 2
3 and 2
If for the dissociation of NH2COONH4(s), Kp is 32 atm3 then equilibrium pressure is
2 atm
4 atm
32 atm
6 atm
If the equivalent weight of metal is 12, then the equivalent weight of its oxide will be
16
28
20
24
The pH of 10–8 M HCl solution is
8
6
3
6.97
Equal volumes of two strong acids having pH = 4 and pH = 6 are mixed. How much volume of this mixture is required to neutralise the 100 ml 0.2 N NaOH solution?
3.96 litre
3.96 ml
3.96 × 10^5 ml
3.96 × 10^6 ml
A sudden large jump between the values of second and third ionisation energies of element would be associated with which of the following electronic configuration?
1s2 2s2, 2p6, 3s1
1s2, 2s2 2p6, 3s2 3p1
1s2, 2s2 2p6, 3s2 3p2
1s2, 2s2, 2p6, 3s2
3 g of an oxide of metal is converted completely into its chloride having mass 5 g. Equivalent weight of metal will be
8
40
35.55
33.25
The ionization potential of the electron in the ground state of hydrogen atom is 13.6 eV. Then, the ionization potential for the electron in the second excited state of He+ ion will be
13.6 eV
3.41 eV
6.04 eV
30.6 eV
Number of oxygen molecules present in 1 equivalent of oxygen are (NA: Avogadro's number)
The percentage loss of mass by Na2SO4·10 H2O to become anhydrous is
72.5%
45.2%
55.9%
65.2%
Angular momentum of electron in 5th orbit of hydrogen atom is given by
Maximum number of electrons in an atom having n + l + m = 3 is
6
2
8
4
Given below are two statements: One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion(A): Na+ and Al3+ are iso-electronic but ionic radius of Na+ is less than that of Al3+. Reason(R): The magnitude of effective nuclear charge on the outer shell electrons in Na+ is greater than that in Al3+. In the light of above statements, choose the most appropriate answer from the options given below.
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
The equilibrium constant of the reaction can be altered by
Adding reactants
Adding products
Increasing volume
Decreasing temperature
Consider the following statements Statement-I: Gay Lussac’s Law of Gaseous Volumes: When gases combine or are produced in a chemical reaction they do so in a simple ratio by volume provided that all gases are at same temperature and pressure. Statement-II: The volumes of H2(g) and O2(g) which combine together to form water bear a simple ratio of 2 : 1 In the light of above statements, choose the correct answer from the options given below.
Statement I is false but statement II is true
Both statements I and II are true
Both statements I and II are false
Statement I is true but statement II is false
Correct order of first ionization enthalpy of the given elements is
F > O > N > C
N > F > O > C
O > F > N > C
F > N > O > C
The ratio of the wavelength of the second line of Balmer series to the third line of Balmer series of H-atom is
21 : 25
28 : 25
25 : 28
21 : 17
At 298 K, pH of a saturated solution of a diacidic base X(OH)2 is 11. The solubility product (Ksp) of X(OH)2 is
5.0 × 10–10
7.0 × 10–9
7.0 × 10–8
4.0 × 10–9
For a diprotic weak acid (H2A) the value of Ka1 and Ka2 are 3 × 10–6 and 3 × 10–10 respectively. The pH of its 1M aqueous solution will be
5.55
3.74
6.92
2.76
The first ionisation potential of Na, Mg and Si are respectively 496, 737 and 786 kJ/mol. The ionisation potential of Al will be closer to
419 kJ/mol
575 kJ/mol
760 kJ/mol
801 kJ/mol
Which will make acidic buffer?
100 mL of 0.1 M HCl and 50 mL of 0.2 M NH4OH
100 mL of 0.1 M CH3COOH and 50 mL of 0.1 M NaOH
100 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH
100 mL of 0.2 M HCl and 100 mL of 0.1 M CH3COOH
Covalency of aluminium in [AlCl(H2O)5]2+ is
2
3
5
6
The value of IE1, IE2, IE3 and IE4 of a metal is xeV, 2xeV, 3xeV and 20xeV respectively. Then the formula of the metal sulphate is
M2SO4
M2(SO4)3
MSO4
M(SO4)2
Which of the following is independent on the temperature?
Normality
(w/v)%
Molality
Molarity
Read the following Assertion (A) and Reason (R) statements and select the correct option. Assertion: Centrosome is an organelle usually containing two cylindrical structures called centrioles. Reason: Both the centrioles in a centrosome lie perpendicular to each other and each has a cartwheel appearance.
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
Read below given features a. Stored food is very similar to amylopectin and glycogen in structure. b. Complex post fertilization development occur. c. Absence of motile stage throughout their life cycle. d. Deepest dweller. Above given features are true for members of
Chlorophyceae
Phaeophyceae
Rhodophyceae
Chrysophytes
Gemmae are
Non-green
Unicellular structure
Asexual buds
Present on sporophyte
Which of the given is not seen in sporophyte of Equisetum?
Strobilus
Node
Rhizome
Floral bud
Which of the given plants has flower of bilateral symmetry?
Cassia
Canna
Datura
Chilli
Vascular cryptogams differ from amphibians of plant kingdom as former
Have multicellular sex organs
Have photosynthetic gametophyte
Have sporophyte as dominant plant body
Show zygotic meiosis
Opposite phyllotaxy of leaves is found in
Mustard, maize
China rose, guava
Calotropis, guava
Nerium, Alstonia
A : Artificial classification system separates the closely related species into different groups. R : Artificial classification system is based on few characters only.
Both Assertion & Reason are true and the reason is the correct explanation of the assertion
Both Assertion & Reason are true but the reason is not the correct explanation of the assertion
Assertion is true statement but Reason is false
Both Assertion and Reason are false statements
The spread of living pteridophytes is limited and restricted to narrow geographical regions because of
Dependence of gametophytes on sporophytes
Gametophytes that require cool, damp and shady places to grow
No need of water for fertilisation
Sporophyte which can grow only in dry conditions
Which of the following is not a moss?
Funaria
Salvinia
Polytrichum
Sphagnum
If a capsule cell of Funaria has 10 chromosomes then number of chromosomes in its zygote and a rhizoid cell are respectively
10, 5
5, 10
5, 5
10, 10
Classification system based upon gross superficial morphological characters
Was given by Bentham and Hooker
Was an artificial classification
Consider various internal features also for classification of organisms
Was mainly based upon evolutionary relationships among organisms
Read the statements and select the correct option. Statement A: Cytoplasm is the main arena of cellular activities in only plant cells. Statement B: Ribosomes are non-membrane bound organelles.
Only statement A is correct
Both statements A and B are correct
Only statement B is correct
Both statements A and B are incorrect
Select the features which are common for both ER and Golgi apparatus.
Only (b)
Only (b) and (c)
Only (a) and (d)
All except (d)
In five kingdom classification, how many kingdoms may have photosynthetic members but without membrane bound cell organelles?
Three
Four
One
Two
Archaebacteria are dissimilar to eubacteria as the former have
Peptidoglycan in their cell wall.
Branched chain lipids in the membrane.
Different sequences of 16S ribosomal RNA genes.
All a, b and c
The stem bear single leaf at each node in
Sunflower
Guava
Calotropis
Nerium
Which of the given plants have superior ovary with axile placentation?
Tomato
Gram
Mustard
Tulip
Petunia
State True(T) or False(T) for the given statements w.r.t. the characters of algae and select the correct option. A. Most common asexual spores are non-flagellated. B. Some of the algae have association with animals. C. They are responsible for 50% of total photosynthesis on earth. D. Agar, an important commercial product is obtained from some brown algae.
FFTT
FTTF
TFFT
TTFF
Consider the following statements regarding methanogens and select the correct option. A. They are obligate anaerobes B. Are responsible for production of a greenhouse gas from dung of ruminant animals C. Live in harsh habitats like extreme salty areas D. Are chemoautotrophs
A, B and D are correct
B and D are incorrect
Only A and B are correct
B, C and D are correct
Given floral diagram is correct for
Sesbania
Indigofera
Petunia
Allium cepa
A plant family to which a medicinal plant muliathi belongs
Has bisexual and zygomorphic flowers
Has inferior ovary
Has endospermons seeds
Has perianth
How many of the given fungi belong to the class Basidiomycetes, Phycomycetes and Deuteromycetes, respectively? Saccharomyces, Mucor, Ustilago, Trichoderma, Bracket fungi, Alternaria, Colletotrichum, Albugo, Puffballs, Claviceps
3, 2, 4
2, 2, 4
3, 2, 3
3, 3, 3
Which of the following statements is incorrect regarding fungi?
It is a unique kingdom of heterotrophic organisms
They are mostly terrestrial
They prefer to grow in warm & humid places
They are always diploid with thalloid body
Find the odd one out about epipetalous stamen
In this condition stamen is attached to petal
Stamen is attached to tepals
This condition is present in chilli
Potato and tomato also have epipetalous androecium
Which one of the following is the correct statement for viroids?
Protein capsid is present
Infectious DNA particles
Discovered by T.O. Diener
Pathogenic only in animals
Select the wrongly matched pair
Plasmodesmata – Connects cytoplasm of neighbouring cells
SER – Detoxification of drugs
RER – Continuous with outer membrane of nucleus
Primary cell wall – Incapable of growth
A fungus ‘X’ with below given features should belong to the class a. Non-motile asexual spores b. Fruiting bodies absent c. Hyphae aseptate
Deuteromycetes
Ascomycetes
Basidiomycetes
Zygomycetes
Aleurone layer in monocotyledonous seeds is
Triploid and is part of scutellum
Diploid and is part of endosperm
Diploid and is part of endosperm
Triploid and is part of endosperm
is the floral formula of a plant family whose one of the members is
Petunia
Gloriosa
Indigofera
Trifolium
Select the ones which are diploid. a. Aleurone layer of maize b. Pollen grain of pea. c. Embryo of Colocasia d. Plumule of wheat e. Seed coat of mango f. Endosperm of castor
b, c & d
c, d & e
d, e & f
All except a & f
Select the correct option w.r.t sub-aerial weak stem that arises from the base of the main axis, grows aerially for some time and then arch downwards to touch the ground.
Runner in grasses
Sucker in pineapple
Offset in mint
Stolon in jasmine
Both Neurospora and Claviceps form
Endogenous asexual and exogenous sexual spores
Conidia as asexual and basidiospore as sexual spore
Zoospore as asexual and ascospore as sexual spore
Exogenous asexual and endogenous sexual spores
Stilt roots
Support main axis in sugarcane
Are helpful to get oxygen
Grow vertically upwards
Are modified for storage of food
Number of peripheral microtubules in a flagellum and centriole is respectively
18 and 27
20 and 27
9 and 27
27 and 18
In pitcher plant, pitcher is a modified
Petiole
Leaf base
Lamina
Leaf apex
In a racemose inflorescence the main axis
Bears a solitary flower
Has unlimited growth
Terminates in a flower
Has limited growth & flowers grow in basipetal manner
Which of the following roots grow against the direction of gravity?
Prop roots
Stilt roots
Pneumatophores
Storage root of radish
