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In a hospital, 89% has disease A and 98% has disease B, K% is the number of patients who has both, then K can’t be the subset of ____

Solution:Answer: Least k =87, Max k = 89Let total =100n(A)=89, n(B)=98max (n(A),n(B)) ≤ n(AUB) ≤ 10098 ≤ n(A)+n(B)-n(A n B) ≤... View Article

Find value of (5 – e² ) for ellipse x²/8 + y²/4 = 1

Solution:Answer: 9/2x2/8 + y2/4 = 1a2 = 8, b2 = 4e = c/a = √((a2 - b2)/a2 ) = √(1-4/8) = √(1/2)(5 - e2 ) = 5 - 1/2 = 9/2... View Article

If log_e (x+y) = 4xy. Find (d²y)/(dx²) at x = 0.

Solution:Answer: 40loge (x+y) = 4xyor 1/((x + y)) [1 + (dy/dx)] = 4[x (dy/dx) + y]or 1 + (dy/dx) = 4(x + y) [x (dy/dx) + y]⋯(i)If x = 0, then y =... View Article

The sum of the square of the distance of a point from (0, 0), (0, 1), (1, 1), (1, 0) is 18 and its locus is a circle. If d is the diameter of the circle, then find d²

Solution:Answer: 16(OP) 2 + (AP) 2 + (PC) 2 + (PB) 2=18=> x2 + y2 + x2 + (y - 1) 2 + (x - 1) 2 + y2 + (x - 1) 2 + (y - 1) 2 =18=> 4x2 + 4y2... View Article

How many 3 digit numbers by using the digits 0,1,3,4,6,7 can be possible if repetition are allowed?

Solution:Answer: 180digits 0,1,3,4,6So, 5 x 6x 6 = 180... View Article

f(x) = [latex]cos((2 tan^{-1}((sin((cot^{-1}(sqrt{((1-x)/x) )} ) )[/latex] then

a. (1-x)2 f'(x) - 2(f(x)) 2 = 0b. (1-x) 2 f'(x) + 2(f(x)) 2= 0c. (1+x) 2 f'(x) - 2(f(x)) 2= 0d. (1+x) 2 f'(x)+2(f(x)) 2= 0Solution:Answer:... View Article

Which of the following is the correct sequence of the following conversion?

a. Br2 / FeBr3, HNO3 / H2SO4, NaCN, H2O / H+b. HNO3 / H2SO4, Br2 / FeBr3, Mg / Ether, CO2, H3O+c. NaCN, H3O+, Br2 / FeBr3, H3O+ / CO2 / H2Od.... View Article

The ratio of water of crystallization present in Mohr’s salt to that of Potash alum is……..x 10^-1?

Solution:Answer: (2.5)Potash alum = K2(SO4).Al2(SO4)3.24H2OMohr’s salt = (NH4)2Fe(SO4)2.6H2ORatio of water molecule = = 0.25 = 2.5 x... View Article

In the given equation:

+ ₂(ℎ / = 125^o ) → ?

Solution:Answer: (a)Bromination is highly selective.Reactivity order is: 3o > 2o > 1o.... View Article

Choose the correct option for the given statements.

Question: Choose the correct option for the given statements. Statement-I: Titration of a strong acid with a weak base uses methyl orange as an... View Article

Correct sequence of [Equation] of [Equation] at constant temperature.

a. (At constant temperature)And as we know, Molar Mass: CO2 > O2 > N2Therefore, Urms : UN2 > UO2 > UCO2Hence, option a) is correct.... View Article

Choose the correct option for the below-given statements.

Statement I: In Bohr’s model, the velocity of electrons increases with a decrease in the positive charge of the nucleus as electrons are not held tightly.

Statement II: Velocity decreases with an increase in principal quantum number.

a. Statement I is correct & Statement II is correctb. Statement I is correct & Statement II is incorrectc. Statement I is incorrect &... View Article

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Archives

In a hospital, 89% has disease A and 98% has disease B, K% is the number of patients who has both, then K can’t be the subset of ____

Find value of (5 – e² ) for ellipse x²/8 + y²/4 = 1

If log_e (x+y) = 4xy. Find (d²y)/(dx²) at x = 0.

The sum of the square of the distance of a point from (0, 0), (0, 1), (1, 1), (1, 0) is 18 and its locus is a circle. If d is the diameter of the circle, then find d²

How many 3 digit numbers by using the digits 0,1,3,4,6,7 can be possible if repetition are allowed?

f(x) = [latex]cos((2 tan^{-1}((sin((cot^{-1}(sqrt{((1-x)/x) )} ) )[/latex] then

Which of the following is the correct sequence of the following conversion?

The ratio of water of crystallization present in Mohr’s salt to that of Potash alum is……..x 10^-1?

In the given equation:

+ ₂(ℎ / = 125^o ) → ?

Choose the correct option for the given statements.

Correct sequence of [Equation] of [Equation] at constant temperature.

Choose the correct option for the below-given statements.

Statement I: In Bohr’s model, the velocity of electrons increases with a decrease in the positive charge of the nucleus as electrons are not held tightly.

Statement II: Velocity decreases with an increase in principal quantum number.

Which of the following will dissolve in water and give colour?

Which compound will have an equal freezing point as 0.1 Methanol?

Choose the correct option for the statements given below – Chemistry Problem

Choose the ion whose aqueous solution is violet coloured?

(A) and (B) respectively will be

Find the product – Solve Chemistry Problem

For adsorption of a gas

Predict the major product for the following reaction:

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