List of practice Questions

If A,B are symmetric matrices of same order,then AB−BA is a

If \(A=\begin{bmatrix}cosα& -sinα\\ sinα& cosα\end{bmatrix}\),thenA+A=I,if the value of \(α\) is

The complex ions \([Co(NH_3)_5(NO_2)]^{2+\) and \([Co(NH_3)_5(ONO)]^{2+}\) are called}

A block of mass 50 kg is moving with speed of 10 m/s on a rough horizontal surface (friction coefficient of 0.3). Find the kinetic friction acting on the object.

A truck is moving from rest with constant power P. if the displacement of the truck is proportional to t", where t is time, find n.

A solid sphere is rolling without slipping. Find the ratio of rotational kinetic energy to total kinetic energy of sphere.

Shortest wavelength in Lyman series has wavelength of 915 À. Longest wavelength of Balmer series has a value of ?

Equanil drug is used for which disease?

Which of the following molecule is an acidic oxide?

From the given information, calculate enthalpy of formation of 2 moles of $C_6H_6$(l) at 25°C. Given: $CH(C_6H_6$(l)) = –3264.6 kJ/mol $CH(C(s))$ = –393.5 kJ/mol $fH(H_2O(l))$ = –285.83 kJ/mol

Number of π bonds present in product B is:

In an atom, how many electrons can have
(i) n = 4 (ii) m1 =1 (iii) ms = ½

How many of the following have zero dipole moment $H_2S, CH_4, NH_3, BF_3, SO_2, NF_3$

Consider the following reaction: The product is

Find out value of $C_p/C_y$ for an ideal gas undergoing reversible adiabatic process for which $P ∝ T^3$ is given

Which of the following is true regarding coagulation of egg:

If y=\(\frac{2\cos2\theta+\cos\theta}{\cos3\theta+\cos^2\theta+\cos\theta}\), Then value of y''+y'+y is

If S = {2, 4, 8, 16, ..., 512}. If S is broken in 3 equal subsets A, B and C such that A∩B = B∩C = C∩A = φ and A∪B∪C = S then maximum number of ways to break is

A line L is perpendicular to y = 2x + 10 such that it touches the parabola y² = 4(x – g). Then the distance between point of contact and origin is equal to

Consider a equation  P(x)= ax² + bx + c =0. If a,b,c ∈ A, were A = {1, 2, 3, 4, 5, 6} . Then the probability that P(x) has real and distinct roots?

Area bounded by y = -2|x| and y = x|x| is:

Let image of point(8,5,7) with respect to line \(\frac{x-1}{2}=\frac{y+1}{3}=\frac{z-2}{5}\) is (α,β,γ). Then, α+β+γ is equal to______.

The number of real solution x|x + 5| + 2|x + 7| - 2 = 0 is