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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 rule and... 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 effect... 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 called the inverse matrix of A such that it... 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 called the inverse matrix of A such that it... 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 up with the last digit as 0, 2, 4, 6 or... 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 anion (3) Large cation... 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 number. These factors are nothing but... 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 eqaution (1), we get 3x + 4(mx... 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 (1) 5.4g (2)... 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 charge enclosed... 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 × B r = (mV/qB) mV =... 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 kinetic energy of the body. It can be... 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 to the displacement... 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 base 2 numeral system. It represents the... 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 obtain metals with very... View Article

How to calculate percentage? Give example.

Answer: In mathematics, a percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate per cent of a... View Article

If a,b,c,d are four positive real numbers such that abcd = 1, then the minimum value of (1 + a)(1 + b)(1 + c)(1 + d) is equal to_________?

Answer: 16 Real numbers are numbers that include both rational and irrational numbers. Rational numbers such as integers (-2, 0, 1),... View Article

A student wants to project the image of a candle flame on the walls of school laboratory by using a lens (1) Which type of lens should be use? (2) At what distance in terms of focal length F of the lens should be place the candle flame so as to get (a) a magnified, and (b) a diminished imaged respectively on the wall?

Answer: (1) The student should use a convex lens since it will allow him to project an image on the walls because the convex lens will create a... View Article

Following cards are put facing down: A E I O U What is the chance of drawing out (1) A card marked U? (2) A vowel (3) A or I (4) A consonant?

Answer: Probability is a measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty. We can predict... View Article

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