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An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the % increase in the apparent frequency? (1) Zero (2) 0.5% (3) 5% (4) 20%

An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is... View Article

The correct statement for the molecule CsI₃ is that (1) it contains Cs⁺,I⁻ and lattice I₂ molecule (2) it contains Cs³⁺ and I⁻ ions (3) it is a covalent molecule (4) it contains Cs⁺ and I³⁻ ions

Answer: (4) it contains Cs+ and I-3 ions CsI3 → Cs+ + I3– CsI3 contains Cs+ and I3–. It is... View Article

State the law of conservation of angular momentum and explain with a suitable example.

Answer: . The law of conservation of angular momentum states that when no external torque acts on an object, no... View Article

Which condition is not satisfied by an ideal solution? (1) Δ_mixH = 0 (2) Δ_mixV = 0 (3) Δ_mixS = 0 (4) Obeyance of Raoult’s law

Answer: (3) ΔmixS = 0 An ideal solution is a mixture in which the molecules of different species are distinguishable,... View Article

Not considering the electron spin, the degeneracy of second excited state is 9, while the generality of the first excited state of H atom is (1) 1 (2) 2 (3) 3 (4) 4

Answer:(1) 1 Electron orbitals having the same energy levels are called degenerate orbitals. Single electron species don’t follow the H... View Article

Jahn-Teller effect is not observed in high spin complexes of (1) d⁴ (2) d⁹ (3) d¹⁰ (4) d⁷

Answer: (3) d10 The geometrical distortion of molecules and ions caused by particular electron configurations is known as the John-Teller... View Article

How to find the inverse of 3 x 3 matrix?

Answer: If A is a non-singular square matrix, there is an existence of n x n matrix A-1, which is... View Article

How to find the inverse of the matrix?

Answer: If A is a non-singular square matrix, there is an existence of n x n matrix A-1, which is... View Article

How many even numbers are there between 1 to 100?

Answer: Any number that can be exactly divided by 2 is called as an even number. Even numbers always end... View Article

According to Fajan’s rule, covalent bond is favoured by (1) Small cation and large anion (2) Small cation and small anion (3) Large cation and large anion (4) Large cation and small anion

According to Fajan’s rule, covalent bond is favoured by (1) Small cation and large anion (2) Small cation and small... View Article

If 3 is the least prime factor of number a and 7 is the least prime factor of number b,then the least prime factor of a+b is (1) 2 (2) 3 (3) 5 (4) 10

Answer: (1) 2 Prime factorisation is a method to find the prime factors of a given number, say a composite... View Article

The number of integral values of m, for which the x-coordinate of the point of intersection of the lines 3x + 4y = 9 and y = mx + 1 is also an integer is (1) 0 (2) 2 (3) 4 (4) 1

Answer: (2) 2 Given eqaution 3x + 4y = 9__________(1) y = mx + 1___________(2) Substitute the eqaution (2) in... View Article

The weight of silver displaced by a quantity of electricity which displaces 5600 ml of O₂ at STP will be (1) 5.4g (2) 108.0g (3) 54.0g (4) 10.8g

The weight of silver displaced by a quantity of electricity which displaces 5600 ml of O<sub>2</sub> at STP will be... View Article

If the electric flux entering and leaving an enclosed surface respectively are ϕ1 and ϕ2, the electric charge inside the surface will be (1) (ϕ2−ϕ1)/ε0 (2) (ϕ2+ϕ1)/ε0 (3) (ϕ1−ϕ2)/ε0 (4) ε0(ϕ2−ϕ1)

Answer: (4) ε0(ϕ2−ϕ1) Gauss Law states that the total electric flux out of a closed surface is equal to the... View Article

Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform mag. field and describe circular path of radius r₁ and r₂ respectively. The ratio of mass of X to that of Y is ___________ (1) √(r₁/r₂) (2) (r₂/r₁) (3) (r₁/r₂)² (4) (r₁/₂2)

Answer: (3) (r1/r2)2 Magnetic Force = q × V × B Centripetal force = mV2/r mV2/r = q × V... View Article

Power supplied to a particle of mass 2 kg varies with time as P = 3t²/2 watt, where t is in second. If the velocity of particle at t = 0 is v = 0, the velocity of particle at time t = 2 s will be (1) 2√2 m/s (2) 4 m/s (3) 1 m/s (4) 2 m/s

Answer: (4) 2 m/s According to work-energy theorem, the net work done on a body is equal to change in... View Article

The S.I unit of permittivity of free space (ϵ0) is (1) CN⁻¹−m⁻¹ (2) Nm^-2C^-2 (3) C²N⁻¹m⁻² (4) C²N⁻¹m^-2

Answer: (4) C2N-1m-2 Permitivity (ε) is the property of every material, which measures the opposition offered against the formation of... View Article

A particle executes a simple harmonic motion of time period T. Find the time taken by the particle to go directly from its mean position to half the amplitude. (1) T/2 (2) T/4 (3) T/8 (4) T/12

Answer: (4) T/12 Simple Harmonic Motion (SHM) is defined as a motion in which the restoring force is directly proportional... View Article

How do you convert binary to decimal number?

Answer: A binary number system is defined as a number that is used in binary systems. It is also called... View Article

Zone refining process is used for the (1) Concentration of an ore (2) Reduction of a metal oxide (3) Purification of metal (4) Purification of an ore

Answer: (3) Purification of metal Zone Refining is a method used for purifying crystals and impurities in the metal to... View Article

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