SADHIK- IIT- JEE MAINS
Date : 04.04.2014
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Marks : 100
PHYSICS
A wavefront is an imaginary surface
a) Phase is same for all points
b) Phase changes at constant rate at all points along the surface
c) Constant phase difference continuously changes between the points
d) Phase changes all over the surface
Huygen’s principle is used
a) to determine the velocity of light
b) to find the position of a wave front
c) to determine the wavelength of light
d) to find the focal length of a lens
Two waves are said to be coherent if they have
a) Different frequency, and same phase
b) Same frequency, and same phase
c) Same frequency, but different phase
d) Different frequency, and different phase
A pair of coherent sources may be
a) One virtual and the other real
b) both real
c) both virtual
d) 1 and 3
LASER light is considered to be coherent because it consist of
a) Many wavelengths
b) Un coordinate wave lengths
c) Co-ordinated wave of exactly the same wavelength
d) Divergent beams
The path difference between light rays from two coherent sources for constructive
interference is
a) n1/2
b) (2n+1) 1/2
c) (2n-1) 1/2
d) n1
To demonstrate the phenomenon of interference we require two sources which emit
radiation of
a) nearly the same frequency
b) the same frequency
c) different wavelength d) the same frequency and having a definite phase relationship
The phenomenon of Interference is possible in the case of
a) Longitudinal waves b) Transverse waves
c) Both
d) None
During interference of light
a) energy is destroyed at the dark bands
b) energy is created at the bright bands
c) energy is conserved but distributed among bright and dark bands
d) all the above are true
In the Young’s double slit experiment, the fringe width depends upon
a) distance between the two slits
b) distance between the slits and the screen
c) wavelength of light
d) all the above
Colours of soap film in sun light is due to
a) Dispersion
b) Diffraction
c) Interference
d) Double refraction
In Young’s double slit experiment the central part has (initially the two sources are
in phase)
a) Bright band
b) Dark band c) Partially bright band d) Partially dark band
In Young’s double slit experiment the band width is minimum for the colour
a) Red
b) Yellow
c) Green
d) Blue
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The graph between the separation of the slits and fringe width in Young’s double
slit experiment is (assume that the distance between the source and the screen and
the wavelength of the source are kept constant)
a) straight line with negative slope
b) rectangular hyperbola
c) straight line with positive slope
d) parabola
In Young’s double slit experiment the monochromatic source of light is replaced by
white light. Then the interference pattern on the screen is
a) Black central fringe surrounded by a few coloured fringes on either side
b) White central fringe surrounded by a few coloured fringes on either side
c) Unchanged
d) Uniform illumination without any fringe system
If Young’s double slit apparatus is shifted from air to water, then
a) Fringe width decreases
b) Fringe width increases
c) Fringe width remains same
d) Fringe system disappears
In Young’s double slit experiment the phase difference between the waves reaching
the central fringe and fourth bright fringe will be
a) zero
b) 4p
c) 6p
d) 8p
In Young’s double slit experiment a mica plate of thickness ‘t’ and refractive index
‘’ is introduced in one of the interfering beams. Then the central fringe will be
displaced through (d = distance between slits; D = distance between the slits and the
screen)
(𝜇−1)𝑡𝐷
a) dt/D( - 1)
b)
c) Dt/d
d) dt /D
𝑑
When a thin metal plate is placed in the path of one of the interfering beams of light
a) the fringes become blurred
b) the fringes become brighter
c) the fringes disappear
d) the fringe width increase
Two coherent sources S1 and S2 produce interference fringes. If a thin mica plate is
introduced in the path of light from S1 then the central maximum
a) shift towards S2
b) shift towards S1
c) do not shift to any side
d) disappear
CHEMISTRY
Which of the following is a liquid at 25oc
a) Na
b) Fr
c) K
d) Li
Alkali metals exist only as compounds because they are highly
a) Electro negative
b) Non-metals
c) Electro positive
d) None
The alkali metal that can combine directly with nitrogen when heated in air is
a) Na
b) Li
c) Cs
d) K
Which of the following undergoes decomposition on heating
a) Li2CO3
b) K2CO3
c) Na2CO3
d) Rb2CO3
The alkali metal with lowest melting point is
a) Fr
b) Cs
c) Rb
d) Na
Which of the following property of alkali metals increase with increase in atomic
number
a) Ionic radius
b) Electronegativity
c) Melting point
d) First ionization potential
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The alkali metal widely used in photo electric cells is
a) K
b) Rb
c) Cs
d) Na
Unpaired electrons are present in
a) BaO2
b) KO2
c) K2O
d) Na2O2
The softness of a group IA metals increases down the group because
a) The metallic bond strength decreases with increase in atomic size
b) I.P. decreases from Li to Cs
c) E.N. increases from Li to Cs
d) Atomic size decreases from Li to Cs
The metal that reacts easily with water is
a) Li
b) Cu
c) Fe
d) Cs
Which of the following is highly soluble
a) Na2O
b) K2O
c) Rb2O
d) Cs2O
The increasing order of basic nature for Na2O, MgO and Al2O3 is
a) Al2O3, MgO, Na2O
b) MgO, Na2O, Al2O3
c) Al2O3, Na2O, MgO
d) Na2O, Al2O, MgO
Which of the following is the strongest base
a) Li OH
b) KOH
c) Cs OH
d) NaOH
Alkali metal when exposed to air tarnish quickly due to the
a) formation of their hydroxides
b) formation of their carbonates
c) formation of their oxides
d) all the above
Pick out the false statement:
a) the electropositive character of alkali metals decreases with increases in atomic
number
b) lithium is a hard metal and cannot be cut with a knife
c) Alkali metals are strong reducing agents
d) the electro negativities of all alkli metals remain the same
Which of the following statements concening alkali metals is true?
a) They are powerful oxidation agents
b) They are powerful reducing agents
c) They have no oxidizing or reducing poperty
d) They are both oxidising and reducing agents
A solution of sodium metal in liquid ammonia acts as a strong reducing agent due to
the presence of
a) NaNH2
b) Sodium ions
c) Sodium hydride d) Solvated electrons
Which of the following will have largest size in water
a) Rb+
b) Na+
c) K+
d) Li+
The correct order of stability of hydrides of alkali metal is
a) LiH > NaH > KH > RbH
b) NaH > KH > RbH > LiH
c) RbH > KH > NaH > LiH
d) LiH > RbH > KH > NaH
The correct order of mobility of alkali metal ions n aqueous solution is:
a) K+ > Rb+ > Na+ > Li+
b) Rb+ > K+ > Na+ > Li+
c) Li+ > Na+ > K+ > Rb+
d) Na+ > K+ > Rb+ > Li+
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BOTANY
Who is known as the Father of mycology
a) P.A. Micheli
b) Bessey
c) De Bary
d) Butler
Chlorophyll absent, nutrition absorptive, sexual reproduction gradually becoming
simple and degenerated are specialites to
a) Algae
b) Fungi
c) Lichen
d) Bacteria
Fungi tissue is called
a) Plectenchyma
b) Pseudoparenchyma
c) Prosenchyma d) All the above
In which fungi the cell wall is absent
a) Phycomycetes
b) Ascomycetes
c) Deutreamycetes
d) None of the above
The fungi growing on faecal matter are called
a) Coprophilous
b) Saprophyte
c) Parasite
d) Symbiont
Which is called as micorrhiza
a) Root like structure made of fungal hypae
b) Fungi growing on roots
c) Association of fungi and roots of higher plants
d) All the above
Which of these is unicellular fungi
a) Yeast
b) Synchytrium
c) (1) and (2) both
d) None of these
Unicellular, multinucleate, amoeboid type of thallus fungi is called
a) Coeenocytic
b) Multinucleate
c) Plasmodium
d) Syncytial
What is lacking in fungi
a) Carotenoids
b) Chlorophyll
c) Both a and b
d) None of these
Who discovered lomasomes
a) Moore
b) Mc Clear
c) Both a and b
d) Gaumann
Which of these is a facultative saprophyte
a) Albugo
b) Aspergillus
c) Ustilago
d) Agaricus
Absorptive nutrition is found in
a) Plants
b) Fungi
c) Bacteria
d) All the above
Which process occurs during sexual reproduction in Mucor
a) Gametangial contact b) Gametangial copulation c) Spermatisation d) Somatogamy
What happens in dikaryotisation
a) Fusion of two nuclei in cell
b) Separation of two nuclei in cell
c) Transfer of nucleus from one type of cell to another type of cell
d) Each cell of the hyphae becoming dikaryotic
Where the basidiospores are formed
a) In basidium (Endogenous)
b) On basidium (exogenous)
c) In basidiocarp
d) On basidiocarp
Which type of enzymes are secreted by fungi to drive nutrition
a) Endoenzymes
b) Exoenzymes
c) Both a & b
d) Isoenzymes
Which are self sterile organisms
a) Homothalic
b) Heterothalic
c) both of above
d) None of these
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Who is known as the father of Indian mycology
a) E.J. Butler
b) Maartin
c) K.C. Mehta
d) H.A.D. Beri
The classification of fungi is mainly based on
a) Septation in mycelium
b) Reserve food
c) Types of spores
d) All the above
In which of the following mycogical groups the cell wall is made up of cellulose
a) Zygomycetes
b) Trichomycetes
c) Oomycetes
d) Ascomycetes
ZOOLOGY
The study of worms causing parasitic infestation in humans is :
a) Malacology
b) Helminthology
c) Ichthyology
d) Herpetology
Flatworms resemble to coelenterates in :
a) body plan
b) symmetry
c) number of germ layers
d) parasitism
What is common amongst tapeworm, liver fluke and planarian?
a) They are all found in gut
b) They are all segmented
c) They all have flattened body
d) They all have a coelem
Flame cells are excretory organs of :
a) Coelenterates
b) Platyhelminthes
c) Annelida
d) Echinodermata
In flatworms, the excretory organs are :
a) Archaeocytes
b) Solenocytes
c) Nephrons
d) Nephridia
Anus is absent in
a) Fasciola
b) Metaphire
c) Unio
d) Periplaneta
Which one is not a larva stage of flatworms?
a) Miracidium
b) Bipinnaria
c) Cercaria
d) Redia
Which one of the following kinds of animals are triploblastic?
a) Corals
b) Sponges
c) Flatworms
d) Ctenophores
Roundworms differ from flatworm in having a :
a) Pseudocoel
b) Circular muscle layer
c) Dorsal nerve cord
d) Circulatory system
Which one of the following phyla is characterized by the absence of a true coelem?
a) Annelida
b) Mollusca
c) Nematoda
d) Echinodermata
One of the following characteristics is not found in nematoda :
a) Hermaphroditism
b) Elongated body
c) Cell constancy
d) Pseudocoel
Which of the following belongs to class Insecta?
a) Julus
b) Silverfish
c) Lobsters
d) Prawn
Spiders and scorpion belong to class :
a) Anthozoa
b) Merostomata
c) Arthropoda
d) Arachnida
Peripatus is a connecting link between :
a) Annelida and Arthropoda
b) Annelida and Mollusca
c) Mollusca and Arthropoda
d) Coelenterata and Platyhelminthes
Syncytial (=coenocytic) epidermis is present in :
a) Housefly
b) Ascaris
c) Metaphire
d) Periplaneta
Wuchereria bancrofti is transmitted by :
a) Culex
b) Anopheles
c) Tsetse fly
d) Sandfly
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Filariasis is caused by
a) Ascaris lumbricoides
b) Taenia solium
c) Fasciola hepatica
d) Wuchereria bancrofti
78. Which one of the following disease is caused by a nematode?
a) Leprosy
b) Poliomyelitis
c) Amoebiasis
d) Filariasis
79. The correct matching of causative agent/germ and disease:
a) Anopheles - Malaria
b) Leishmania – Sleeping sickness
c) Glossina – Kala-azar
d) Wuchereria – Filariasis
80. Scientific name of pinworm is
a) Trichinella
b) Ancylostoma
c) Enterobius
d) Wuchereria
ENGLISH
Directions : Choose the word that best fills in the blank
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Being a direct relative of the deceased, her claim to the estate was
a) optional
b) vicious
c) prominent
d) legitimate
The hail ………… the cornfield until the entire crop was lost.
a) belittled
b) pummeled
c) rebuked
d) commended
The Earth Day committee leader placed large garbage bins in the park to …………
Saturday’s cleanup
a) confound
b) pacify
c) integrate
d) facilitate
Her rapport with everyone in the office ………… the kind of interpersonal skills that
all of the employees appreciated
a) prevailed
b) diverged
c) exemplified
d) varied
The ………… of the two rivers provided the perfect place to build a new state park
a) assumption
b) confluence
c) seclusion
d) treatise
Do you have the ………… paperwork you need to register for the class?
a) punitive
b) grandiose
c) restorative
d) requisite
Do not ………… yourself; you must pass the last exam of the semester to graduate
a) delude
b) depreciate
c) relinquish
d) prohibit
When you address the members of the committee, be sure to give a …………
description of the new office procedures
a) principled
b) determined
c) comprehensive
d) massive
Although Hunter was ………… about revealing information to us when we first met
him, he soon began to talk more than anyone.
a)customary
b) reticent
c) animated
d) voluntary
The darkening skies in the west were a ………… to the dangerous thunderstorm that
summer afternoon
a) tedium
b) precursor
c) preference
d) momentum
The news was no longer secret; Martin Kemp ………… told the press that he had
accepted the nomination as board chairperson.
a) repulsively
b) reputedly
c) perpetually
d) principally
After an hour of heavy rain, the thunderstorm …………, and we were able to continue
our golf game.
a) abated
b) germinated
c) constricted
d) evoked
93. After years of experience, Florin became a ………… veterinarian who could treat and
operate on many different kinds of animals
a) acute
b) superficial
c) consummate
d) ample
94. Anthony, a meticulous young man, ………… watered his neighbor’s plants once a
week while they were on vocation
a) terminally
b) perpendicularly
c) diligently
d) haphazardly
95. ………… elephants from the wild not only endanger the species but upset the balance
of nature
a) Irritating
b) Poaching
c) Provoking
d) Smuggling
96. The two cats could be ………… only by the number of rings on their tails; otherwise,
they were exactly alike.
a) separated
b) divided
c) disconnected
d) differentiated
97. On each slick curve in the road, I was afraid we would ………… and have an accident
a) operate
b) hydroplane
c) submerge
d) reconnoiter
98. My cousin claimed to be ………… ; evidently she was right because she always seemed
to know what would happen in the future.
a) dreamlike
b) comical
c) criminal
d) clairvoyant
99. Although the plot of the film is admittedly trite, the characters are so endearing that
the movie is highly entertaining despite the old storyline. Trite means
a) original
b) exciting
c) complex
d) overused
100. Ilka has always emulated her older brother, so it is no surprise that she is also pursuing
a career as neuroscientist. To emulate means
a) to support wholeheartedly
b) to strive to equal, imitate, or outdo
c) to be more successful than
d) to regard as inferior
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