List of practice Questions

Let A and B be two matrices then (AB)' equals:

Let $\overrightarrow{a} $ and $\overrightarrow{b} $ be two unit vectors. If the vectors $\overrightarrow{c} =\overrightarrow{a}+2\,\overrightarrow{b} $ and $\overrightarrow{d} =5\,\overrightarrow{a}-4\,\overrightarrow{b} $ are perpendicular to each other, then the angle between $\overrightarrow{a} $ and $\overrightarrow{b} $ is .

Let $A = \{1, 3, 5, 7, 9, 11\}$, then number of subsets of $A$ is equal to

Let $a_1,a_2,a_3,a_4$ and $a_5$ be such that $a_1,a_2$ and$ a_3$ are in A.P., $a_2,a_3$ and $a_4$ are in G.P. and $a_3, a_4$ and $a_5$ are in H.P. Then, $a_1,a_3$ and $a_5$ are in

Let $a_1, a_2, a_3,$ ...........be the sequence, then the sum expressed as $a_1 + a_2 + a_3 + ...... + a_n$ is called ........

Let $A = \{a_1, a_2\}$ and $B = \{b_1, b_2\}$, then the number of relations from $A$ to $B$ is

Length of intercept made by the circle $x^{2} + y^{2} - 16x + 4y - 36 = 0$ on $x$-axis is

Let $A = { 1,2,3,4}$ and $B = {2,3,4,5,6 }$ then $A \Delta B$ is equal to

Let A = {1, 2, 3, 4, 5} and the functions f :A $\to$ A and g:A $\to$ A be defined by f (1) = 3, f (2) = 5, f (3) = 3, f (4) = 1, f (5) = 2; g (1) = 4, g (2) = 1, g (3) = 1, g (4) = 2, g (5) = 3. Then

Let $A=\begin{bmatrix}1&2\\ -5&1\end{bmatrix} $and$ A^{1} = xA + yI$, then the values of $x$ and $y$ respectively are

Least energetic conformation of cyclohexane is

Leaves appear green because they

Leaves of many plants have adventitious buds that help in vegetative propagation, e.g., Begonia, Bryophyllum, Adiantum, etc.In Bryophyllum diagremontianum, buds develop on the marginal notches of intact leaves which form plantlets

Lead poisoning in the body can be removed by

Lead sulphate is soluble in

Leaf tip tendrils are present in

'Lean meat' is considered to be of high quality because it has

Lead Pencil contains

Lead pipes are not suitable for drinking water because

Largest diffraction is undergone in the case of

Laser light of wavelength 630 nm incident on a pair of slits produces an interference pattern in which the bright fringes are separated by 8.1 mm. A second light produces an interference pattern in which the fringes are separated by $7.2\, mm$. The wavelength of the second light is

Latex is a colloidal suspension of rubber particles, they carry

Lanthanoid contraction is due to increase in

Lampbrush chromosomes are seen in which typical stage?

$l,m,n$ the real, $l\, \ne\, m$, roots of the equation $(l -m) x^2- 5(l + m)x -2(l- m) = 0$ are.