Hard woods have
In which of the following animals, blood does not transport oxygen
Cauliflower, used as vegetable is
The reaction of pure water is
The term chromosome was coined by
Major function of mitochondria in a cell is
Which type of blood vessel has thick walls in order to withstand high pressure?
Centrioles and centrosomes occur in the cells of
The free floating organisms, of an open sea and shore, are collectively called
Wings of Bat, Locust and Pigeon are
Which one is not vestigial in humans
Enzyme required for transcription is
Central dogma of modern genetics is
During DNA replication, the strands separate by
Out of two alleles of the same gene, one finds morphological expression. The phenomenon is
How many types of genotypes are formed in F₂-progeny obtained from self-pollination of a dihybrid F₁ ?
A pregnant woman underwent amniocentesis. An extra barr body is present in the embryo. Syndrome likely to occur in child is
In sex-linked traits the males are
A disease transferred from mother to child through placenta is
Which is wrong?
Edward Jenner discovered
Goldfussia in which two differnt size of filamentous hair like structures protruding from its tip are
Floral diagram fails to indicate
Ovary is called inferior in
Hypothesis for oxygen coming from water was put forward by
Which of the following can yield a completely haploid plant
Epidermal outgrowths are known as
In which one of the following pathogens do the cells of promycelium after the germination of teleutospore produce infection hyphae instead of basidiospores?
Which of the following organisms is used as an indicator of water quality?
Result of ozone hole is
Melanin protects us from
Relapse of malaria is caused by :
The site of testosterone production in the cytoplasm of an interstitial cell is the
What is the energy required in calories for formation of energy rich bond between phosphorus and ADP molecule in DNA?
The major objection against the theory of Natural Selection is that it
Neo-Darwinism believes that new species develop through
Lederberg replica experiment explains
The site of tubular excretion is the
The process that moves glucose from the proximal convoluted tubule into the peritubular capillaries is
Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength λ . If R is the Rydberg constant, the principal quantum number n of excited state is
An alternating current of rms value 10 A is passed through a 12 Ω resistor. The maximum potential difference across the resistor is
Energy, when one milligram mass is converted in to energy (in joules ) is
Two condensers, one of capacity C and the other of capacity C/2 , are connected to a V volt battery, as shown.
The work done in charging fully both the condensers is
x g of Ag is deposited by passing 4 A of current for 1 hour. How many gram of Ag will be deposited by passing 6 A for 40 min?
A laser beam is used for carrying out surgery because it
As the laser beam is highly monochromatic, directional and coherent, it can be sharply focussed.
Therefore it is used for carrying out surgery
In a balanced Wheatstone's network, the resistances in the arms Q and S are interchanged. As a result
At what temperature, the resistance of a copper wire will become three times its value at 0oC (Temperature coefficient of resistance for copper = 4 x 10-3 per oC)
Two wires of same material have length L and 2L and cross-sectional areas 4A and A respectively. The ratio of their specific resistance would be
The length of given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be
When a proton is accelerated with 1 volt potential difference, then its kinetic energy is
What is increased in a step-down transformer
In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will be
L = 0.4/π henry, R = 30 ohm
e = 200 volt, f = 50
I = ?, Z = ?
Impedance of L-R circuit
A coil of insulated wire is connected in series with a bulb, a battery and a switch. When the circuit is completed, the bulb lights up immediately. The circuit is switched off and a rod of soft iron is placed inside the coil. On completing the circuit again, it is observed that
The bulb does not glow to its normal brightness, because inductance of coil increases.
The velocity of electromagnetic wave is parallel to
A charge Q is placed at the corner of a cube. The electric flux through all the six faces of the cube is
Two equal print charges are fixed at x = -a and x = +a on the X axis. Another point charge Q is placed at the origin. The change in electrical potential energy of Q, when it is displaced by a small distance x along the X-axis is approximately proportional to
If a point charge q be rotated in a circle of radius r around a charge Q, the work done will be
The plates of a parallel plate capacitor are charged upto 200 volts. A dielectric slab of thickness 4 mm is inserted between its plates. Then to maintain the same potential difference between the plates capacitor, the distance between the plates is increased by 3.2 mm. The dielectric constant of dielectric slab is
The inward and outward electric flux of a closed surface are 8 x103 C and 4 x103C respectively. The net charge inside the closed surface is
A galvanometer of 100 Ω resistance gives full scale deflection with 0.01 A current. How much shunt resistance should be connected with it to convert into an ammeter of range 10 A?
The electric field inside a sphere which carries a charge density proportional to the distance from the origin ρ = α r (α is a constant is)
Cadmium rods are used in a nuclear reactor
α - particle is equivalent to
The mass number of nucleus is
The slope of frequency of incident light and stopping potential for a given surface will be
Graph of maximum kinetic energy of the photoelectrons against ν, the frequency of the incident radiation on the metal, is a straight line of slope equal to
Radius of curvature of convex mirror is 40 cm and the size of object is twice as that of image.Then the image distance is
For a transistor, if current gain in the common-base is 0.96, then current gain in common-emitter is
Light propagates rectilinearly because of its
When a p - n junction diode is reverse biased, the thickness of the depletion layer
The impurity to be added to get n - type semiconductor is
The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the
What is the voltage gain in a common emitter amplifier, where input resistance is 3 Ω and load resistance 24 Ω, β = 0.6 ?
In p-type semiconductors conduction is due to
Indium impurity in germanium takes
When distance between source of light and observer decreases, then the apparent frequency of light
In Young's double slit interference experiment the wavelength of light used is 6000 Å . If the path difference between waves reaching a point P on the screen is 1.5 microns, then at that point P
If ratio of amplitude of two waves is 4:3, then ratio of maximum and minimum intensity is
In Young's experiment of double slit, the intensity of central bright band is ---- times the individual intensities of the interfering waves
Proof spirit (by volume) is a mixture of
The reaction of Grignard reagent with formaldehyde followed by acidification gives
Which of the following does not give red ppt. with Fehling solution?
Which of the following reagents cannot be used to distinguish between hexanal and 2-hexanone?
100 mL of PH₃ on decomposition produced phosphorus and hydrogen. The change in volume is
Pentene-1 with HCl gives
The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ is
Volumetric estimation of Cu2+ is carried out iodometrically as follows:
2 Cu2+ + 4 Kl = 2 Cul2 + 4K+
2 Cul2 = 2 Cul + l2
This liberated l2 is titrated against Na2S2O3 solution
2Na2S2O3 + l2 = Na2S4O6 + 2 Nal
2 moles Cu2+ ions ≡ 1 mole l2 ≡ 2 moles of Na2S2O3
∴ 1 mole Cu2+ ion ≡ 1 mole Na2S2O3
Eq. wt. of Na2S2O3 = mol. wt
∴ 1 mole Cu2+ ion ≡ 1 Eq. wt. of Na2S2O3
Which of the following method is most appropriate for the manufacture of methane?
The colour of the precipitate formed when a reducing sugar is heated with Fehling solution is
DNA has deoxyribose, a base and the third component is
Essential human diet is
Acetamide and NaOBr/OH⁻ produce
In the above sequence of reactions, A and B are
Sulphonation of benzoic acid produces mainly
The rate, at which a substance reacts at constant temperature, depends upon its
A vessel at equilibrium, contains SO₃, SO₂ and O₂. Now some helium gas is added, so that total pressure increases while temperature and volume remain constant. According to Le-Chatelier's principle, the dissociation of SO₃
The heat of neutralisation is maximum when
The heat of neutralisation of any strong acid (HCl, HNO3, H2SO4) with a strong base (LiOH, NaOH, KOH) is always maximum (57.1 kJ). In case, either the acid or the base or both are weak, the heat of neutralisationis usually less than 57.1 kJ.
The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is
The Δ H value for the reaction H2 + Cl2 → 2 HCl is − 44.12 K.cal. If E1 is the activation energy of the reactants and E2 is the activation energy of the products, then for the above reaction
Plants and living beings are the examples of
IUPAC name of CH₃CH = CH-C ≡ CH is
The co-ordination number of a central metal atom in the complex is determine by
Which one of the following will not show geometrical isomerism?
In the following reaction C₆H₆NH₂ + CHCl₃ + 3NaOH → A + 3B + 3C the product A is
Which of the following reagent can be used to convert benzene diazonium chloride into benzene ?
Acetic anhydride reacts with diethyl ether in the presence of anhydrous AlCl₃ to give
The equivalent conductance of NaCl, HCl and C₂H₅COONa at infinite dilution are 126.45, 426.16 and 91 ohm-1 cm2 respectively. The eq. conductance of C₂H₅COOH is
The molar conductances of NaCl, HCl and CH₃COOHa at infinite dilution are 126.45, 426.16 and 91 Ω-1-cm2-mol-1 respectively. The molar conductance of CH₃COOH at infinite dilution i s
Iron rusts in the presence of
When oxalic acid is dehydrated by conc. H₂SO₄, then it forms
What is hybridization of P in Pcl₅ ?
Iron ore is concentrated by
Vapour pressure of a substance on increasing temperature
The acid which forms two series of salts is
Chlorine is in +1 oxidation state in
Which of the following describes the hexagonal close packed arrangement of spheres?
Which one of the following substances is not used for preparing lyophillic sols?
CuCl₂ and CuBr₂ exist as
The basic character of the transition metal monoxides follows the order
Find the Antonym of LEND
Find the Syonym of ABORIGINAL
Fill in the blank with appropriate word.
He lost the match easily because he had played a.........five set match in the earlier round.
Choose the alternative which best expresses the meaning of the idiom/phrase.
To end in smoke
Improve the sentence by choosing best alternative for capitalised part of the sentence.
No one could explain how a calm and balanced person like him could PENETRATE such a mindless act on his friends.