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Which National Park derives its name from the abundance of Red Silk Cotton Trees?
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Which National Park derives its name from the abundance of Red Silk Cotton Trees?
Some algae live as endophytes in sea-weeds. Which of the following alga is endophytic to the aquatic fern, $$\textit{Azolla}$$?
St. $$Anthony's $$ Fire disease is caused by consumption of infected grains of rye. Which of the following is responsible for this disease?
Given below are two statements, one labeled as Assertion (A) and the other labeled as Reason (R).
Choose the correct option from the codes given below.
Assertion (A): Each of the two strands of the original DNA molecule serves as a template for the
synthesis of a new complementary strand. The result is two DNA molecules, each composed of one old
(parental) strand and one new (daughter) strand.
Reason (R): During replication, the original DNA molecule is broken into fragments and each fragment is
replicated. The newly synthesized DNA fragments and the original fragments are then interspersed,
resulting in both strands of the daughter DNA containing a mix of old (parental) and new (daughter)
DNA segments.
Who among the following is the launching leader of the Human Genome Project?
Which of the following is often referred to as the Old Man of the Jungle?
In the following experimental set-up, a twig of a succulent plant $$\textit{Crassula}$$ was inserted in the glass tube. The apparatus was kept in sunlight for 6 hours. The inserted bubble will
Make the correct matches of the items M, N, O and P with (i) - (iv)
Choose the option showing correct matches:
Singly or in combination with other nucleotides, which of the following produce co-enzymes for oxidation-reduction reactions?
Match the characteristics (V-Z) listed in Column I with the Groups (i-v) listed under
Column II:
Choose the option showing the correct matches:
In the animal Kingdom some examples of structures (internal or external) with similar name and function
are found in distantly related animals. This is a fascinating example of convergent evolution. Choose the
correct option exhibiting such similarity by possessing an organ called ‘CROP’:
Identify the animals X and Y. Choose the correct option showing their diagnostic characteristic of scales.
Which of the following is not only the most abundant biopolymer on earth but a Nitrogenous Polysaccharide, too?
The mathematical relationship called Fibonacci Series is commonly observed in the arrangement of
Santalin, Red Brasilin and Haematoxylin dyes are naturally found in
Although, profiles of different types of soil differ markedly with respect to their physico-chemical and
biological properties; the following diagram shows a typical hypothetical soil profile with its 5 principal
horizons [O to R].
Study the given diagram. The characteristics [Q to U] related to various horizons and the names of
horizons [i to v] are tabulated below:
Make the correct matches of the characteristics [Q to U] with the horizons [i to v] and choose the correct
option:
A mixture of hydrogen and chlorine kept in a closed flask at constant temperature was irradiated with scattered light. After a certain time the chlorine content decreased by 20 $$\%$$ compared with the starting mixture and the resulting mixture had 60 volume $$\%$$ chlorine, 10 volume $$\%$$ hydrogen and 30 volume $$\%$$ hydrogen chloride. Determine the composition of the initial gaseous mixture.
A research scholar requires 50 mL aqueous $$\mathrm{NaNO_3}$$ solution containing 70.0 mg Na+ per mL. The amount of $$\mathrm{NaNO_3}$$ required is
A sample of crystalline soda (A) with a mass of 1.287 g was allowed to react with excess hydrochloric acid and 100.8 mL of gas was liberated at STP. How many molecules of water in relation to one molecule of $$\mathrm{Na_2CO_3}$$ are contained in the sample of soda? Relative atomic masses are Na = 23, H = 1, C = 12 and O = 16.
Which of the following ammonium salts release $$\mathrm{SO_3}$$ gas on thermal decomposition.
Which of the following group contains solid compounds at $$10^\circ\mathrm{C}$$?
How many primary 1 degree are possible for $$\mathrm{C_5H_{13}N}$$?
For the compound given below, the correct increasing order of $$C-H$$ bond strength is
Consider the $$C-O$$ bonds x, y and z present in the compound given below. The increasing order of $$C-O$$ bond length is
The correct order of the bond energy of different $$C-H$$ bonds in the given compound is
The total number of moles of $$\mathrm{NaHCO_3}$$ consumed during the given reaction is x. The value of x is
If 1 mL of water contains 20 drops, the number of water molecules in each drop of water is, where A is Avogadro number.
In which of the below given sets, all types of bonds ionic, covalent and coordinate are present in all the molecules?
Which of the following $$C-H$$ bonds has lowest bond dissociation energy?
The total number of lone pairs of electrons in $$I_3^-$$ is
The correct order of abstraction of hydrogen from the below given compound when treated with halogen is
Which of the following will form foam in water containing $$\mathrm{Ca^{2+}}$$ and $$\mathrm{Mg^{2+}}$$ ions?
A student, intending to catch a bus, finds that the bus starts and accelerates away with uniform acceleration $$a=2\text{ m s}^{-2}$$ when he is 16 m far from the bus. He runs with unifor$$\mathrm{m\ s^{-1}}$$peed so as just to catch the bus. The minimu$$\mathrm{m\ s^{-1}}$$peed with which the student must run is
A block of mass 2.0 $$\mathrm{kg}$$ is suspended from the ceiling by a massless string. The string is taut when the block is stationary. Suddenly, the string breaks and the block starts falling freely. The difference in the tension in the string just before and after it breaks is
Having been paddled continuously on a horizontal road, the speed of a bicycle is increasing. The force of friction exerted by the ground on the wheels is
A current $$i=2\text{ amp }$$ is established through the long straight conductors which are the arms of a hairpin
like structure placed in the plane of paper as shown in the figure. Knowing that a current carrying
conductor produces magnetic field represented by the lines of force, analyze the situations described
The correct option is
A certain water pump rated 500 watt lifts water from ground level to a height $$h=10\text{ m}$$ at a rate of 240 $$\mathrm{kg}$$ per minute. Ignoring kinetic energy, the efficiency of the water pump is
An electric kettle consists of two filaments F1 and F2 of different resistances 𝑅1 and 𝑅2 respectively,
connected in parallel with separate switches. With a certain fixed amount of water in the kettle pot to
prepare the tea, when only F1 is switched on, it takes 4 minute to boil the water. When F1 and F2 both are
switched on simultaneously, it takes 3 minute to boil the same amount of water up to the same
temperature. The time taken to boil the same amount of water when only F2 is switched on (assume that
entire heat radiated by filaments is used in boiling the water starting from the same room temperature in
each case) is
Two filament bulbs $$B_1$$ of 100 W and 220 V and $$B_2$$ of 60 W and 220 V are connected in series with a 440 V supply. When switched on, the bulb
The volume of water spilled out of a completely filled cubic container of side 4 m when the container is accelerated horizontally with $$1.96\text{ m s}^{-2}$$ is
Two athletes, A and B, run in the ground on an oval track of length L (say) at 8.0 m/s and 6.0 m/s
respectively in the same direction starting from same initial point. How many laps (rounds) will the athlete
A complete on the track before overtaking athlete B for the first time?
A wooden solid cylinder (density 0.80 kg/m3), a plastic ball (density 0.90 kg/m3) and a rubber cube (density
0.95 kg/m3) all of equal mass M float partly immersed in a trough containing water (density 1.00 kg/m3) as shownbelow (ignore any tilt during floatation).
A stone is thrown vertically down into a well, the splash is heard after a time t1. If the stone is thrown
vertically up with the same speed from the same point, the splash is heard after a time t2. The common
initial speed (u) of the stone in both the cases is given by (the time taken by the splash sound to reach the
observer is ignored)
A beam of light is incident parallel to principal axis on a convex lens (L) of focal length f = 20 cm. A
plane mirror PQ (See figure), inclined at 60° with the principal axis, is placed a distance ‘d’ behind the
lens so as to form a real image I of the distant object at a distance ‘d’ from the optical center of the lens as
shown in the figure. The value of ‘d’ is
The value of d is
A 80 kg man skating with a speed of 10 m/s on a smooth horizontal surface collides with a 20 kg skater at
rest, as a result the two cling to each other. What percentage of initial kinetic energy of skaters is lost
during the collision? (Ignore any friction)
Two cylindrical vessels V1 and V2 are placed on the same horizontal level. Each vessel contains the same
liquid of density ρ. Initially the vessels are not connected (valve closed). The height of liquid in vessel V1
is h1 and that in vessel V2 is h2. The diameter of vessels V1 and V2 are 2d and d respectively. When
vessels are interconnected (valve opened) at the bottom, the height h of liquid in each vessel (neglecting
the volume of liquid in connecting tube) will be
Two vertical object pins are located on the principal axis of a thin lens at distances of $$x_{1}$$= 9.0cm and $$x_{2}$$= 18.0cm from the lens on the two sides of the lens. The images of the two pins formed by the lens are at the same position (overlap). The focal length and the nature of the lens are
A steam boat goes across a lake up to a distance of 1200 meter and comes back. There is a uniform wind
blowing with velocity v so as to help the onward journey and to impede the journey back. If the uniform
speed of launch of the boat is 5 ms-1 and total time taken by the boat in going and coming back is 500 s,
the velocity v of the wind blow is
Fine structure of striated muscle fibres has been elucidated with the help of electron microscope. Study
the following statements and choose the incorrect ones:
The autonomic nervous system is divided into sympathetic and parasympathetic parts. Some effects are given below. Choose the correct options.
Study the following statements regarding haemophilia and choose the incorrect options.
Which of the following trees do not show cheiropterophily?
The pair(s) or pairs of elements which have equal numbers of electrons in the outermost shell are
The correct statement or statements are
Considering the hydrogen spectrum series, select the correctly matched pairs.
Which of the following acids are stronger than benzoic acid?
A trolley of mass 240 kg is initially at rest on the frictionless horizontal straight rails lying in east-west
direction. The length of the trolley is 20 meter. A man of mass 60 kg is standing at the eastern end of the
trolley. The man starts moving on the trolley from eastern end towards west with velocity 1.0 m/s relative
to the trolley. Assume the displacement and the velocity in eastward direction to be positive.
Choose the correct option.
In an experiment performed using a cloud chamber (a device that can show the tracks of subatomic
particle) the nature of a particle can be analysed. Under the influence of a strong perpendicular magnetic
field B directed into the plane of paper, a particle track like the one shown beside as p q was obtained.
The track shown may depict
A homogeneous column of water with refractive index a$$\mu_w=4/3$$ and height 8.0 $$\mathrm{cm}$$ fills the space above a 9.0 $$\mathrm{cm}$$ thick glass slab with refractive index a$$\mu_g=3/2$$. Observers A and B are in air just outside the top and the bottom whereas the observers C and D are inside just below the top and above the bottom. The total thickness of glass plus water
observed by these observers are
Several resistances of 2 $$\Omega$$ and 3 $$\Omega$$ form the electric network shown in the figure. A dc supply of emf 18 Volt and negligible internal resistance has been connected between points A and B.
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