A molecule of a substance has permanent dipole moment p. A mole of this substance is polarised by applying a strong electrostatic field E. The direction of the field is suddenly changed by an angle of $$60^\circ$$. If N is the Avogadro's number the amount of work done by the field is :
NEET 2017 PITA
For the following questions answer them individually
If the angle of a prism is $$60^\circ$$ and angle of minimum deviation is $$40^\circ$$, then the angle of refraction will be
A student performs an experiment of measuring the thickness of a slab with a vernier calliper whose 50 divisions of the vernier scale are equal to 49 divisions of the main scale. He noted that zero of the vernier scale is between 7.00 cm and 7.05 cm mark of the main scale and 23rd division of the vernier scale exactly coincides with the main scale. The measured value of the thickness of the given slab using the calliper will be :
If the longest wavelength in the ultraviolet region of hydrogen spectrum is $$\lambda_o$$ then the shortest wavelength in its infrared region is :
A circular coil of radius 10 cm, 500 turns and resistance 2 Ω is placed with its plane, perpendicular to the horizontal component of the earth’s magnetic field. It is rotated about its vertical diameter through $$180^\circ$$ in 0.25s. The induced e.m.f in the coil is (Take $$H_E = 3.0 \times 10^{-5} T$$)
Two reasons for using soft iron as the material for electromagnets
A girl jumps down from a moving bus, along the direction of motion of the bus, tilting slightly forward. She falls on (a) a sheet of ice (b) a patch of glue.
A person has near point at 60 cm. The focal length of spectacles lenses to read at 22 cm having glasses separated 2 cm from the eyes, is :
Two sides of a semiconductor germanium crystal A and B are doped with arsenic and indium, respectively. They are connected to a battery as shown in figure
The correct graph between current and voltage for the arrangement is
A bulb connected in series with an air-cored solenoid is lit an a.c source. If a soft iron core is introduced in the solenoid
Due to Doppler effect, the shift in wavelength observed is $$0.1 A^\circ$$, for a star producing a wavelength $$6000 A^\circ$$. The velocity of recession of the star will be:
A metal rod of 1m length, is dropped exact vertically on to a hard metal floor. With an oscilloscope, it is determined that the impact produces a longitudinal wave of 1.2k Hz frequency. The speed of sound in the metal rod is :
The angular momentum of a rigid body of mass m about an axis is n times the linear momentum (P) of the body. Total kinetic energy of the rigid body is :
A parallel-plate capacitor is to be designed, using a dielectric of dielectric constant 5, so as to have a dielectric strength of $$10^9 Vm^{-1}$$. If the voltage rating of the capacitor is 12kV, the minimum area of each plate required to have a capacitance of 80 pF is :
A cyclist on a level road takes a sharp circular turn of radius 3m (g = 10 ms$$^{-2}$$). If the coefficient of static friction between the cycle tyres and the road is 0.2, at which of the following speeds will the cyclist not skid while taking the turn?
An electron moves straight inside a charged parallel plate capacitor of uniform change density $$\sigma$$ The space between the plates is filled with uniform magnetic field of intensity B, as shown in the figure. Neglecting effect of gravity, the time of straight line motion of the electron in the capacitor is :
Inside a parallel plate capacitor the electric field E varies with time as $$t^2$$. The variation of induced magnetic field with time is given by :
The volume of 1 mole of an ideal gas with the adiabatic exponent $$\gamma$$ is changed according to the relation $$V = \frac{b}{T}$$ where b = constant. The amount of heat absorbed by the gas in the process if the temperature is increased by $$\triangle T$$ will be:
Two coherent sources of intensity ratio $$\alpha$$ interfere. The value of $$\frac{I_{max} - I_{min}}{I_{max} + I_{min}}$$ is:
When the temperature of a gas is raised from $$30^\circ C$$ to $$90^\circ C$$, the percentage increase in the r.m.s velocity of the molecules will be :
A parallel beam of light of wavelength $$\lambda$$ is incident normally on a single slit of width d. Diffraction bands are obtained on a screen placed at a distance D from the slit. The second dark band from the central bright band will be at a distance given by :
A thin uniform rod of mass ‘M’ and length ‘L’ is rotating about a perpendicular axis passing through its centre with a constant angular velocity $$'\omega'$$. of mass $$\frac{M}{3}$$ are attached gently to the two ends of the rod. The rod will now rotate with an angular velocity of :
Two open organ pipes of fundamental frequencies $$n_1$$ and $$n_2$$ are joined in series. The fundamental frequecny of the new pipe so obtained will be :
The density of a metal at normal pressure is $$\rho$$. Its density when it is subjected to an excess pressure p is $$\rho'$$ If B is Bulk modulus of the metal, the ratio of $$\frac{\rho'}{\rho}$$ is
In the electrical circuit shown in the figure, the current i through the side AB is
If the mass of neutron is $$1.7 \times 10^{-27}$$ kg, then the de-Broglie wavelength of neutron of energy 3eV is : $$(h = 6.6 \times 10^{34} JS)$$
Imagine earth to be a solid sphere of mass M and radius R. If the value of acceleration due to gravity at a depth ‘d’ below earth’s surface is same as its value at a height ‘h’ above its surface and equal to $$\frac{g}{4}$$ (where g is the value of acceleration due to gravity on the surface of earth), the ratio of $$\frac{h}{d}$$ will be:
In a certain planetary system, it is observed that one of the celestial bodies having a surface temperature of 200K, emits radiation of maximum intensity near the wavelength 12 $$\mu$$m. The surface temperature of a nearby star which emits light of maximum intensity at a wavelength $$\lambda = 4800 A$$, is:
One mole of a gas obeying the equation of state P(V-b) = RT is made to expand from a state with coordinates $$(P_1, V_1)$$ to a state with $$(P_2, V_2)$$ along a process that is depicted by a straight line on a P-V diagram. Then, the work done is given by
A metal block of base area 0.2m$$^2$$ is connected to a 0.02 kg mass via a string that passes over an ideal pulley as shown in figure. A liquid film of thickness 0.6 mm is placed between the block and the table. When released the block moves to the right with a constant speed of 0.17 m/s. The co-efficient of viscosity of the liquid is :
The energy liberated per nuclear fission is 200 MeV. If $$10^{20}$$ fissions occur per second the amount of power produced will be
A ball of mass 1 kg is thrown vertically upwards and returns to the ground after 3 seconds. Another ball, thrown at $$60^\circ$$ with vertical also stays in air for the same time before it touches the ground. The ratio of the two heights are
A body initially at rest, breaks up into two pieces of masses 2 M and 3 M respectively, together having a total kinetic energy E. The piece of mass 2 M, after breaking up, has a kinetic energy :
A light beam is incident on a denser medium whose refractive index is 1.414 at an angle of incidence $$45^\circ$$. Find the ratio of width of refracted beam in a medium to the width of the incident beam in air.
From the circuit of the following Logic gates, the basic logic gate obtained is :
A body starts moving unidirectionally under the influence of a source of constant power. Which one of the graph correctly shows the variation of displacement(s) with time (t)?
In an experiment of photoelectric effect the stopping potential was measured to be $$V_1$$ and $$V_2$$ with incident light of wavelength $$\lambda$$ and $$\lambda/2$$ respectively. The relation between $$V_1$$ and $$V_2$$ is
A cell of emf E and internal resistance ‘r’ is connected to a variable external resistor ‘R’. The graph which gives the terminal voltage of cell ‘V’ with respect to R is
A wall consists of alternating blocks of length ‘d’ and coefficient of thermal conductivity $$K_1$$ and $$K_2$$ respectively as shown in figure. The cross sectional area of the blocks are the same. The equivalent coefficient of thermal conductivity of the wall between left and right is:
A common emitter amplifier circuit is shown in the figure below. For the transistor used in the circuit the current amplification factor, $$\beta_{dc} = 100$$ Other parameters are mentioned in the figure.
We find that :
The angle between $$\overrightarrow{A} - \overrightarrow{B}$$ and $$\overrightarrow{A} \times \overrightarrow{B}$$ is $$\overrightarrow{A} \neq \overrightarrow{B}$$:
A satellite of mass m is in circular orbit of radius $$3 R_E$$ about earth (mass of earth $$M_E$$, radius of earth $$R_E$$). How much additional energy is required to transfer the satellite to an orbit of radius $$9 R_E$$ ?
A wheel having mass m has charges +q and -q on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of a vertical electric field E. Then value of E is :
A uniform magnetic field of 0.3 T is established along the positive Z-direction. A rectangular loop in XY plane of sides 10 cm and 5 cm carries a current of I = 12 A as shown. The torque on the loop is :
The rotational kinetic energy of a solid sphere of mass 3 kg and radius 0.2 m rolling down an inclined plane of height 7 m is :
Consider the following sequence of reactions :
The substance ‘B’ is
Toluene in the vapour phase is in equilibrium with a solution of benzene and toluene having mole fraction of toulene 0.50 If vapour pressure of pure benzene is 119 torr and that of toluene is 37.0 torr at the same temperature, mole fraction of toluene in vapour phase will be :
Among halogens, the one which can oxidise water to oxygen is :
The reaction :
Amongst the following compounds the one which is most easily sulphonated is
The standard equilibrium constant, Kp at 298 K for the reaction, $$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3 (g) is 5.8 \times 10^5$$. The value of standard equilibrium constant, if the concentration of gases is expressed in terms of mol/L, will be :
[Given : R = 0.08314 L bar $$K^{-1} mol^{-1}$$]
Which one of the folowing ions is not tetrahedral in shape ?
The letter ‘D’ in D-glucose signifies :
Consider the following reaction for which the change in enthalpy is positive
$$2A(g) + B(g) \leftharpoondown C(g) + D(g)$$
Which of the following will not affect the equilibrium ?
Consider the reaction between chlorine and nitric oxide
$$Cl_2(g) + 2NO(g) \rightarrow 2NOCl(g)$$
On doubling the concentration of both reactants, the rate of the reaction increases by a factor of 8. However, if only the concentration of $$Cl_2$$ is doubled, the rate increases by a factor of 2. The order of this reaction with respect to NO is :
Which of the following will react faster through $$S_N 1$$ mechanism ?
The correct statement regarding ethane conformation is :
Which of the following lanthanoids shows +4 oxidation state to acquire noble gas configuration ?
(At nos. : La = 57, Ce = 58, Eu = 63 and Yb = 70)
The tendency to form monovalent compounds among the Group 13 elements is correctly exhibited in :
W hich of the f ollowing complex ions is not diamagnetic ?
The product (P) of the following reaction
Match Column-I with Column-II:
Which of the following absorbs carbon dioxide and releases oxygen?
Of the following, the largest value of entropy at $$25^\circ C$$ and 1 atm is that of
Which of the following pairs shows highest bond dissociation enthalpy among halogens and lowest bond dissociation enthalpy among hydrogen halides?
For the reaction $$CO(g) + Cl_2(g) \rightleftharpoons COCl_2 (g), \frac {K_p}{K_c}$$ is equal to
A compound formed by Mg, Al and O, is found to have cubic close array of oxide ions in which $$Mg^{2+}$$ occupying $$\frac {1}{8}th$$ of tetrahedral voids and $$Al^{3+}$$ ions occupying $$\frac{1}{2}$$ the octahedral voids. The formula for the compound is
Which of these artificial sweetener is unstable at cooking temperature?
Strong reducing behaviour of $$H_3PO_2$$ is due to
For the tetrahedral complex $$[MnBr_4]^{2-}, the spin only magnetic moment value is
[At. no. of Mn = 25]
The total number of orbitals present for principle quantum number, n = 4 is
Under isothermal and reversible conditions, the term "free energy" in thermodynamics signifies
Which of the following statements is incorrect?
The oxidation of phenol with chromic acid gives
For the reaction, $$XA + YB \rightarrow ZC$$, if $$\frac {-d[A]}{dt} = \frac {-d[B]}{dt} = \frac {1.5d[C]}{dt}$$, then the correct statement among the following is
Given that $$\wedge_m^\alpha = 133.4 (AgNO_3); \wedge_m^\alpha = 149.9(KCl); \wedge_m^\alpha = 144.9S cm^2 mol^{-1} (KNO_3)$$ the molar conductivity at infinite dilution for AgCl is
Which of the following statements is incorrect?
Among the following acids, the strongest acid is
The electron distribution in $$d^n$$ coordination complexes depends on magnitude of crystal field splitting, $$(\triangle_0)$$ and pairing energy (P). The condition which favours formation of high spin complexes is
Match the polymer in Column-I to the monomer from Column-II and assign the correct code
The $$[Co(H_2O)_6]^{2+}$$ ion has three unpaired electrons. The hybridization of Co in $$[Co(H_2O)_6]^{2+}$$ is
If the rate of the reaction
is fastest, then Z is
Depressant used in the concentration of an ore containing ZnS and PbS is
Of the following alcohols, the one that would react fastest with conc. HCl and anhydrous $$ZnCl_2$$ is
A hydrocarbon contains 85.7% C. If 42 mg of the compound contains $$3.01 \times 10^{20} molecules, the molecular formula of the compound will be
Which of the following pair of species is not iso-structural?
For dry cleaning of clothes instead of tetrachloroethane which is carcinogen in nature, which of the following solvents can be used?
The zinc/silver oxide cell is used in electric watches. The reaction is as following,
$$Zn^{2+} + 2e^- \rightarrow Zn; E^0 = - 0.760 V$$
$$Ag_2O + H_2 O + 2e^- \rightarrow 2Ag + 2OH^- ; E^0 = 0.344 V$$
If F is $$96,500 C mol^{-1}, \triangle G^0$$ of the cell will be
Which of the following hydrides has the largest bond angle?
Which of the following amino acid is not optically active?
Which statement is wrong about photorespiration?
Select the wrong statement:
Which of the following is not a ciliary movement?
The correct sequence of involvement of cell organelles in secretion of proteins from the cell is:
Continental drift led to disappearance of a number of South American mammals because:
Opposite type of phyllotaxy is not present in:
The Pacinian corpuscle responds to rapid changes in:
Thymosin is responsible for:
Which of the following type of muscle fibres will be the first one to undergo fatigue?
Tree planting helps reduce global warming as trees:
To protect and improve the quality of environment, the Government of India passed the Environment (Protection) Act in the year:
Which technique helps to identify a bacterial or viral pathogen in a human body even when its concentration is very low and clinical symptoms are not yet visible?
Which of the following represents correct match of feature with the given set of animals
Match Column-I with Column-II and select the correct option using codes given below
Which one of the following is not an IUD?
The hollow foliar structure in a wheat embryo that encloses the shoot apex and a few leaf primordia is called:
Which of the following statements is correct with respect to cell cycle?
Select the correct option:
A fat moleucle is formed from:
Restriction endonucleases are:
In Lactational amenorrhoea, ovulation does not occur during the period of intense lactation because of:
Choose the false statement regarding Petromyzon
Select wrong statement:
(a) Glucose is completely reabsorbed
(b) Urea is partially reabsorbed
(c) Proteins are secreted into urine
(d) Creatinine is secreted into urine
Which of the following options, in view of above statements is correct?
Identify and select the wrong statement out of the following:
Air pollution can result in Emphysema, which is
An example of flagellate protozoan is:
n a hypothetical population of 100 individual having ‘r’=0.5/female/year, what will be the population size in 6 years (with e = 2.72) showing exponential rate of growth?
. Which of the following statements is true for phloem in plants?
Which of the following ossicles is adhered to tympanic membrane of middle ear?
Growth hormone Auxin was isolated by F.W. Went from tips of seedling coleoptile of
Special feature about Strobilanthus kunthiana (neelakuranji) is its flowering once in :
Which of the following pairs is not correctly matched?
Which of the following is not true for callus culture?
. Which of the following symmetry is exhibited by Echinoderm Larvae ?
A large amount of about 180 L of fluid is filtered by the human kidneys per day. Which one of the following renal corpuscle features does not justify this?
Which of the followig is not true of organisms in the Kingdom Monera ?
Flippers of Penguins and Dolphins are the example of
A genetically engineered bacterium first used for cleaning the oil spills, was a species of :
What is not true for an angiospermic embryo sac ?
In gene therapy to treat adenosine deaminase deficiency disorder, which of the patients blood cells are used ?
The sequential events from initial stage till climax stage in a succession are called :
Van Mahotsava is a festival of :
Whch of the following cannot be measured by spirometry ?
Which of the following statements is correct ?
Select the sac fungus :
The recessive genes located on X-chromosome in humans are always :
Choose the correct sequence representing the ploidy of Nucellus; Megaspore mother cell; Megaspore; Egg cell; Zygote; A polar nucleus of embryo sac; Secondary nucleus and Primary endosperm nucleus.
Signals for the onset of parturition originate from :
Which of the following structures does not open into the genital chamber of female cockroaches ?
All the components of the conducting system can generate an action potential for the contraction of heart muscle, but the sino-atrial node acts as the pacemaker because :
.The chief function of vessels in the plant body is to
Select the incorrect option with respect to features present in three animals.
“MOET” technique is used for super-ovulation in :
Continued self-pollination results in:
If the ratio of $$\frac{(T+C)}{(A+G)}$$ in one strand of DNA is 1.43, same ratio in the complementary strand is:
A complex of ribosomes attached to a single strand of mRNA is known as:
The protein coat around a virus is called:
A couple claimed in court that a child belonged to them. Their claim can be true if the DNA fingerprint pattern of the child shows.
Which of the following statements regarding enzyme inhibition is correct?
Which of the following values will depict correct respiratory quotient when tripalmitin (a fatty acid) is used as a respiratory substrate?
Cholecystokinin acts on:
An athlete while running fell on the track. She used her hands to sustain minimal injury. In the process, her hands received the maximum blow on the joints. Which combination of joints would be badly affected in this accident ?
Which of the following pathways is involved for packaging of secretory proteins ?
Which of the following statements is not true ?
Which one of the following is not true for the experiments of Mendel on pea ?
The technique of DNA fingerprinting, is superior to conventional fingerprinting because it can:
An inflorescence with younger flowers at the base and the older ones at its apex is known as :
Name the element which is the main constituent of the ring structure of chlorophyll and helps to maintain the ribosome structure
The type of ribosomes is same in:
Which of the following ecologists has tried to put
price-tags on nature’s life support services ?
Tetradynamous stamens are characteristic of:
Which scientist proposed ‘Rivet popper hypothesis’ related to biodiversity and Ecosystems ?
Which of the following enzymes is not protein ?
Which of the following statements is not true ?
The increase in concentration of the toxicant at successive trophic levels is referred to as
Select the correct option :
Pollen grains can be stored for years in liquid nitrogen, maintained at temperature :
Which of the following is a proteinaceous and water soluble photosynthetic pigment ?
Given below are defined the various taxonomic aids used in taxonomy which facilitate identification and classification of organisms. Which one of the following is wrong ?
Which of the following plants has association with Frankia ?
Match Column - I with Column - II and select the correct option.
What is the meaning of Bt in Bt cotton ?
The difference between Marasmus and Kwashiorkor is that :
In the heart, as the action potential reaches the AV node from the SA node, there is a delay of the action potential. This delay is important because :
At what phase of meiosis homologous chromosomes are separated ?
Trace the correct path of sperm from seminiferous tubules :
Consider the following statments and choose the correct option :
(a)Six codons do not code for any amino acid
(b)Codon is read in m-RNA in a contiguous fashion
(c))Three codons function as stop codons
(d) The initiator codon AUG codes for methionine
In roots absorption of water and minerals mostly occurs in the :
Reserved material in prokaryotic cells is stored as :
