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What is the LCM of 4 and 5?

What is the LCM of 4 and 5? Answer: In arithmetic, the least common multiple or LCM of two numbers say a and b, is denoted as LCM (a,b). The... View Article

What is the (a – b)³ formula?

Answer: (a-b)3 formula is used to calculate the cube of a binomial. (a-b)3 is nothing but (a-b)(a-b)(a-b). The a-b whole cube formula is given... View Article

What is the integral of Cotx dx?

Answer: Need to find ∫cotx dx Substitute sinx = u Then cosx dx = du Then the above integral becomes ∫cotx dx =∫(1/u) du... View Article

What is the LCM of 4 and 8?

Answer: In arithmetic, the least common multiple or LCM of two numbers say a and b, is denoted as LCM (a,b). The LCM is the smallest or least... View Article

What is 2 raised to the power 12?

Answer: Exponents and powers are ways used to represent very large numbers or very small numbers in a simplified manner. Basically, power is an... View Article

How to integrate e^2x?

Answer: Consider the given integral. I=∫e2xdx By applying the substitution method, we get u = 2x du = 2dx dx = du/2 Therefore, I =... View Article

Find derivative of x^x.

Answer: Let us consider y = xx Applying log on both the side, log y = x log x Differentiate the above equation with respect to y, . . .... View Article

Which of the following substances gives a positively charged sol? (1) Gold (2) Arsenious sulphide (3) Starch (4) Ferric hydroxide

Which of the following substances gives a positively charged sol? (1) Gold (2) Arsenious sulphide (3) Starch (4) Ferric hydroxide Answer:(4)... View Article

A number when divided by a divisor leaves a remainder of 24, when twice the original number of divided by the same divisor the remainder is 11, then divisor is- (1) 13 (2) 59 (3) 35 (4) 37

Answer: (4) 37 Let x = numbers d = Divisor x = md + 24 Then 2x = nd + 11 2md + 48 = nd + 11 2md - nd = 11 - 48 2md - nd = -37 nd -... View Article

On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be (1) Hydrogen (2) Oxygen (3) Hydrogen sulphide (4) Sulphur oxide

Answer:(2) Oxygen Electrolysis is defined as a process of decomposing ionic compounds into their elements by passing a direct electric current... View Article

In the phenomenon of interference, energy is (1) destroy’s at bright fringes (2) created at dark fringes (3) conserved, but it is redistributed (4) same at all points

Answer:(3) conserved, but it is redistributed Interference is the phenomenon in which two waves superpose to form the resultant wave of the... View Article

The Ksp of Mg(OH)₂ is 1×10_-12. 0.01m Mg(OH)2 will precipitate at the limiting pH equal to________

Answer: The Ksp of Mg(OH)2 is 1×10-12. 0.01m Mg(OH)2 will precipitate at the limiting pH equal to 9. KSP = [Mg2+][OH-]2 Given Ksp =... View Article

How to integrate ln x?

Answer: We will use integration by parts method to solve ∫ln(x)dx. ∫u dv = uv - ∫vdu Let u = ln(x) dv = dx ⇒ v = x ∫ln(x) dx = x ln(x) -... View Article

By what factor does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled? (1) 1.4 (2) 2.0 (3) 2.8 (4) 4.0

Answer:(1) 1.4 Average velocity given by the formula R = Gas constant m = Molecular weight T = Temperature Here Vav = √T... View Article

If momentum of an object is increased by 10% then its kinetic energy will increase by (1) 20% (2) 21% (3) 40% (4)19%

Answer: (2) 21% Kinetic energy is defined as “the energy required by a body to accelerate from rest to stated velocity. It is a vector... View Article

The equation y=Asin²(kx−ωt) represents a wave with (1) amplitude A frequency ω/2π (2) amplitude A /2 frequency ω/π (3) amplitude 2A frequency ω/4π (4) It does not represent a wave motion

The equation y=Asin<sup>2</sup>(kx−ωt) represents a wave with (1) amplitude A frequency ω/2π (2) amplitude A /2... View Article

Two positive point charges are of 12μC and 8μC are 10cm apart from each other. The work done in bringing them 4cm closer is (1) 5.8J (2) 13eV (3) 5.8eV (4) 13J

Answer:(4) 13J Given q1= 12μC q2= 8μC Two charges at a distance d1= 10cm Need to find: The work done in bringing two chargers (q1... View Article

A solution containing 62g ethyl glycol in 250g water is cooled to -10oC. If Kf for water is 1.86Kkgmol-1, the amount of water (ing) separated as ice is (1) 32 (2) 48 (3) 16 (4) 64

Answer: (4) 64 If T0b is the boiling point of the pure solvent and Tb is the boiling point of the solution then elevation in boiling point is... View Article

Which of the following isomers will give a white precipitate with BaCl² solution (1) [Co(NH³)⁵SO⁴]Br (2) [Co(NH³)⁵Br]SO⁴ (3) [Co(NH³)⁴(SO⁴)²]Br (4) [Co(NH³)⁴Br(SO⁴)]

Answer: (2) [Co(NH3)5Br]SO4 The complex [Co(NH3)5Br]SO4 dissociates to give [Co(NH3)5Br]2+ and SO42- ions. SO42- ions reacts with barium... View Article

What is the LCM of 60 and 75?

Answer: LCM is the method to find the smallest possible multiple of two or more numbers. LCM stands for Least common multiple. LCM of two... View Article

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