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(chatquestion)...Ionisation energy of element A are :- IE, 540 kJ/mol 47. IE, IE, 430 120 If A react with different elements, which compounds of A is not possible? (4) A,N, (3) A,N (2) A,0 (1) AF

asked Feb 16, 2020 by balaji.thirumalai

1 answer

(chatquestion)...hydrogen ? होगा - ) 1:4 (2) 4:1 (4) 8:1 (1) 1= (3) 1:8 Arrange the following compounds in decreasing 53. 53. निम्न यौ करें- order of acidity : ОН ОН ОН ОН ОН CH CH-CH, H,C-C-CH, CH, ČH,CH, ČH, CH, (P) (S) (R) (Q) (P) (1) (2) Q>R>P >S (1) P>Q>R> S.

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...my ne column of a given determinant. corresponding elements of any two rows (or columns) of a determinant roportional (in the same ratio), then its value is zero. For example az b3 =0 (rows R, and R, are proportional) b2 A= b, %3D ka, ka, 102 18 36 4. 1 3 9 Evaluate 6. 3 17...(Explain how R1 and R2 are proportional)

asked Feb 16, 2020 by balaji.thirumalai

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(chatquestion)...8. Dind eurtents d, andila intue netwepk EgplV...(Plz Give the Solution of this circuit)

asked Feb 16, 2020 by balaji.thirumalai

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(chatquestion)...95 Which ALLEN part of neuron mitochondria? contain तंत्रिका के more 95. (1) Dendron (2) Axon hillock (1) दुप्र (3) Tigroid body (3) (4) Telodendria 96. Which organelle lack membranes ? 96. किस (2) Centrosome (1) Ribosome

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...0.04K/s Z 4G VOLTE 5:13 PM 23% Major Test-4 NEET-UG - Major SAVE 6/41 A English A block of mass m is at rest on a rough inclined plane, whose friction coefficient is µ. Net force exerted by surface on block is :- mg 2 mg sin e 3 µmg cos 0 X Your Answer 4 umg sin e Solution Silly Conceptual

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...If ax +2hxy+ by² = c ,then show that d²y_c(h² - ab) (hx+by) dx2

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...sin 2x+h) 2 sin 2 - lim- COS x 2h cos(x+h) 2x+h sin - lim- h40 cos(x+h) sin - lim coS x 2 sin x COS X COS X = sec x tan x...(What did happen here ?)

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...R. r/2 T/2 Ar r/2 r/2 R. B....(Find equivalent resistance....if anyone knows..)

asked Feb 16, 2020 by balaji.thirumalai

1 answer

(chatquestion)...If ax +2hxy+ by² = c ,then show that d²y_c(h² - ab) (hx+by) dx2

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...ABC is a right angle triangle in which AB Q.68 = 3 cm, BC = 4 cm and ZABC = The %3D %3D three charges +15, +12 and – 20 e.s.u. are placed respectively on A, B and C. The force acting on B is (1) 125 dynes (3) 25 dynes (2) 35 dynes (4) Zero

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...6. The operation manager of a plant that manufactures tires want to compare the actual inner diameter of two grades tires, each of which is expected to be 575 millimeters. A sample of five tires of each grade has following result Grade X 568 570 575 578 584 Grade Y 573 574 575 577 578 a. Find mean and standard deviation of each grade. b. Which grade of tires is providing better quality?

asked Feb 16, 2020 by balaji.thirumalai

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(chatquestion)...What is the action of conc. NaOH on methanal? What is the action of dilute alkali on ehanal? What is action of Br2 on ethanoic acid?

asked Feb 16, 2020 by balaji.thirumalai

1 answer

(chatquestion)...f (x+h)- f(x) ian We have f'(x) = lim- 1 (x+h) x = lim %3D [(+), *J"...(Pls explain the second step)

asked Feb 16, 2020 by balaji.thirumalai

0 answers

(chatquestion)...f (x)-2 If the function f(x) satisfies lim -= TT, evaluate lim f (x). x² -1 x-1 x-1

asked Feb 16, 2020 by balaji.thirumalai

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(chatquestion)...deóxythymidine. When a phosphate group nucleoside through phosphoester linkage, a corresponding nucleo (or deoxynucleotide depending upon the type of sugar present) is form Two nucleotides are linked through 3-5 nhosnhodiester linkage to for a dinucleotide. More nucleotides ca ut Joneu in sucha manner to for a polynucleotide chain. A polymer thus formed has at one end a f sphate...(What does 3'-5' indicate)

asked Feb 15, 2020 by balaji.thirumalai

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(chatquestion)...If tan x + tan y = ; xy < 1, then write 4 the value of x + y + xy. All India 2014

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...x sin-1 dx. Evaluate | V1-x²

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A solution of Ni(NO3), is electrolysed between platinum electrodes using a current of 5.0 A for 20 min. What mass of nickel will be deposited at the cathode? (Given : Atomic mass of Ni = 58.7 g mol 1F= 96500 Cmol-1) %3D Foreign 2014 %3D

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...10. In Young's double slit experiment fringe width for the interferences of light of wavelength 6000 Aº is found to be 0-8 mm. If the wavelength of light 7500 A° is used and the distance between slits is doubled then determine the fringe width.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A current of 1.50 A was passed through an electrolytic cell containing AgNO3 solution with inert electrodes. The weight of silver deposited was 1.50 g. How long did the current flow? (Molar mass of Ag = 108 g mol, 1F = 96500 C mol-). %3D %3D

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Deduce an expression for the frequency of revolution of a charged particle in a magnetic field and show that it is independent of velocity or energy of the particle.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...In a potentiometer arrangement for determining the emf of a cell, the balance point of the cell in open circuit is 350 cm. When a resistance of 9 Q is used in the external circuit of the cell, the balance point shifts to 300 cm. Determine the internal resistance of the cell. 2018

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...3. %3D 3D The V-I characteristic of a silicon diode is as shown in the figure. Calculate the resistance of the diode at (i) I = 15 mA and (ii) V = -10V (1 mA) 30 Silicon 20 15 10 -10 V 01 0.51 0.7 0.8 V 1 µA

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...69. Consider the following three statements and select the Y correct option stating which ones are true (T) and which ones are false (F). O Hybridisation is crossing of two or more types of 1. plants for bringing their traits together in progeny. (i) Semi-dwarf rice varieties were derived from IR-8 and Taichung Native -1. T (ii) Hybrid breeding have led to the development of several high yielding varieties resistant to water stress.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...The number of atoms of radioactive substance of half-life T is Natt = 0. The time necessary to decay from No/2 atoms to No/10 atoms will be In 5 (d) T In 2 (a) T In 5 (c) T In

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...1 mg gold undergoes decay with 2.7 days half-life period, amount left after 8.1 days is (b) 0.5 mg (d) 0.91 mg (a) 0.125 mg (c) 0.25 mg

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...When four hydrogen nuclei combine to form a helium nucleus estimate the amount of energy in MeV released in this process of fusion (Neglect the masses of electrons and neutrons) Foreign 2011 Given: (i) Mass of H = 1.007825 u (ii) Mass of helium nucleus =4.002603 u, 1 u= 931 MeVIc"

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A radioactive isotope has a half-life of T years. How long will it take the activity to reduce to 3.125% of js original value?

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...The number of nuclei of a given radioactive sample at time t = 0 and t = T are No and Nln, respectively. Obtain an expression for the half-life (T12) of the nucleus %3D in terms ofn and T.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...The magnetic susceptibility of magnesium at 300K is 1.2×10°. At what temperature will its magnetic susceptibility become 1.44x105? A|l India 2019

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A bar magnet of magnetic moment 6 J/T is aligned at 60° with a uniform external magnetic field of 0.44 T. Calculate (a the work done in turning the magnet tO align its magnetic moment inormal to the magnetic field, opposite to the magnetic field and bthe torque on the magnet in the final orientation in case (ii). CBSE 2018

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Prove that the magnetic moment of the electron revolving around a nucleus in an orbit of radius r with orbital speed v is equal to evr/2. Hence using Bohr's postulate of quantisation of angular momentum, deduce the expression for the magnetic moment of hydrogen atom in the ground state. All India 2019

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A small compass needle of magnetic moment M and moment of inertia I is free to oscillate in a magnetic field B. It is slightly disturbed from its equilibrium position and then released. Show that it executes simple harmonic motion. Hence, write the expression for its time period. 00110

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...57. What is displacement currènt? Why was this concept introduced? Explain? PTICS

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...queStTon oT 2020 Exam, 36. Discuss the transmission.of radio waves through earth's atmosphere earth's atmosphere using amplitude modulated band and Give the relation between height of antenna and radius of earth.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...35.Describe electromagnetic spectrum, giving their wavelength and frequency range, their properties and uses, briefly.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...EMW electromagnetic waves? What are the characteristics of e.m. waves? 34. What are

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...21, Due to the earth's magnetic field, charged cosmic ray particles [CBSE AIPMT 1997] (a) can never reach the poles (b) can never reach the equator (c) require less kinetic energy to reach the equator than the poles (d) require greater kinetic energy to reach the equator than the poles

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...reaction. 83 What is a Chain reaction? When is it called chain reaction?

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...2. What are stable and unstable nuclei? What factors contribute towards stability of nuclei?) Discuss the nature of nuclear forces and Discuss nuclear fission

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...What is mass defect? Explain. Explain the terms mass and nuclear binding energy.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...9. Derive the expression for the number or remaining nuciei after time t. Definre half-life of a radioactive substance.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Or, (a) Three point charges 200 µ C,-300 µ C and 400 u C are kept at the vertices A, B and C respectively of an equilateral triangle ABC with each side 0-1 m. Find the electrostatic energy of the system. (b) Write down the relation between electrostatic field intensity and ecetrostatic potential.

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...What do you understand by radioactivity?

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...How are electromagnetic waves produced by accelerating charges? All India 2019 PEGUTVA

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...Sketch a schematic diagram depicting oscillating electric and magnetic fields of an EM wave propagating along positive Z-direction. Foreign 2014

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...1. A girl throws a ball upwards, giving it an initial speed u= 15 m/s. Neglect air resistance, (a) How long does the ball take to return to the girl 's hand? (b) What will be its velocity

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...A capacitor made of two parallel plates, each of area A and separation d is charged by an external DC source. Show that during charging, the displacement current inside the capacitor is the same as the current charging the capacitor. All India 2019

asked Feb 15, 2020 by balaji.thirumalai

1 answer

(chatquestion)...6.(2) Two identical large metallic plates with surface charge densities +o and-o are kept apart by a small distance. There is a point P, in between the two plates and another point P, outside the two plates. Find the electric field intensities at P, and P,. 1 () Find the electric field intonai

asked Feb 15, 2020 by balaji.thirumalai

0 answers

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