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A short bar magnet has a magnetic moment of 0. 65 JT^-1, then the magnitude and direction of the magnetic field produced by the magnet at a distance 8 cm from the centre of magnet on the axis is

A short bar magnet has a magnetic moment of 0. 65 JT^-1, then the magnitude and direction of the magnetic field produced by the magnet at a... View Article

The co-ordinates of a moving particle are x = at^2 and y = bt^2, where a and b are constants. the velocity of a particle at any instant is

The coordinates of a moving particle are x = at^2 and y = bt^2, where a and b are constants. The velocity of a particle at any instant is (a)... View Article

What is the r.m.s values for the current for which the graph here shows its variation with time?

What are the r.m.s values for the current for which the graph here shows its variation with time? (a) (b) (c) (d) Answer: (c)... View Article

A series LCR circuit is connected across a source of emf e = 10 sin, the current from the supply is i = 2 sin. Find the phase difference between e and i.

Determine the phase difference between current and voltage in the given series LCR circuit. Answer: The phase difference between... View Article

Which of the following is the correct stability order for N2 and its given ions?

(A) (B) (C) (D) The Correct Answer is (D) Solution: Bond stability bond order Bond order = Order of filling MO is:... View Article

The hybridization of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ are:

(A) sp, sp2 and sp3 respectively (B) sp2, sp3 and sp respectively (C) sp3, sp2 and sp respectively (D) sp3, sp and sp2 respectively The... View Article

For a reaction, A + 2B ⟶ C, the amount of C formed by starting the reaction with 5 moles of A and 8 moles of B is:

(A) 4 mol (B) 5 mol (C) 8 mol (D) 16 mol The Correct Answer is (A) 4 mol Solution: As given in the above rection A + 2B → C Here, one mole... View Article

In which of the following pair is most efficient packing is present?

(A) hcp and ccp (B) hcp and bcc (C) bcc and ccp (D) bcc and simple cubic cell The Correct Answer is (A) hcp and ccp Solution: The... View Article

Which of the following are ambident nucleophiles?

(A) Br- (B) CN- (C) NO2- (D) Both (B) and (C) The Correct Answer is (D) Both (B) and (C). Solution: Ambident nucleophile refers to an... View Article

What are the possible values of l if n = 5?

Solution: The principle quantum number(n), describe the energy level in which the electron an be found. l = 0 to n - 1 If n = 5 then l... View Article

Which of the following statements does not form a part of Bohr’s model of a hydrogen atom?

(A) Energy of the electrons in orbit is quantised (B) Electrons revolve in different orbits around the nucleus (C) The electron in orbit... View Article

Which of the following are the correct statements?

(A) 2s-orbital has one nodal surface. (B) For 2px-orbital yz is the nodal plane. (C) Electron density in the XY-plane in 3dx2−y2 orbital is zero.... View Article

The standard electrode potential of two half cells are given below- Ni2+ + 2e- Ni; E0 = -0.25V. Zn2+ + 2e- Zn; E0 = -0.77V. The voltage cell formed by combining the two half cells would be:

(A) +0.52 V (B) -0.52 V (C) +1.02 V (D) -1.02 V The Correct Answer is (A) +0.52 V. Solution: As given above: Explore more such... View Article

Which of the following set of quantum numbers (n, l, m, s) represents the valence electron in a copper atom? (atomic number of Cu = 29)

(A) n = 4, l = 1, m = 0, s = +1/2 (B) n = 4, l = 1, m = +2, s = +1/2 (C) n = 4, l = 0, m = 0, s = +1/2 (D) n = 4, l = 0, m = +2, s = +1/2 The... View Article

An unsaturated hydrocarbon ‘A’ adds two molecules of H2 and on reductive ozonolysis gives butane-1, 4-dial, ethanal and propanone. What will be the IUPAC name of ‘A.’

(A) 2-methylocta-2, 5-diene (B) 2-methylocta-2, 6-diene (C) 2-methylocta-3, 5-diene (D) 3-methylocta-2, 5-diene The Correct Answer is (B)... View Article

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