List of practice Questions

Given below is the floral diagram of a flower. Which of the following descriptions of the flower matches the floral diagram ?
Read the two statements A and B and identify the correct choice from those given : Statement A : Agrobacterium tumefaciens is the causative agent of crown gall disease of dicots. Statement B : Agrobacterium tumefaciens cause infection by entering the plant through wounds and injuries.
The chromosomal complement of individuals with Turner's syndrome is :
Carbon dioxide is called green-house gas because it is
This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes the two Statements. It is not possible to make a sphere of capacity $1$ farad using a conducting material. It is possible for earth as its radius is $6.4 \times 10^6\,m$.
In a coil of resistance 10 Ω, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time. The magnitude of change in flux through the coil in weber is
In a coil of resistance 10 Ω, the induced current developed by changing magnetic flux through it, is shown in figure as a function of time.
The function of potassium ethyl xanthate in froth floatation process is to make the ore
Bond order of $1.5$ is shown by:
The differential equation whose solution is $Ax^2 + By^2 = 1$ where $A$ and $B$ are arbitrary constants is of
The tangent at $(1, 7)$ to the curve $x^2 = y - 6$ touches the circle $x^2 + y^2 + 16x + 12y + c = 0$ at
$\int \frac{dx}{\sin x - \cos x + \sqrt{2}} $ equals to
The value of integral $\int\limits_0^1 \, \sqrt{\frac{1-x}{1+x}}dx$ is
The value of $\displaystyle\lim_{x\to\infty}\left(\frac{\pi}{2} - \tan^{-1} x\right)^{1/x} $ is
There are $5$ letters and $5$ different envelopes. The number of ways in which all the letters can be put in wrong envelope, is
The coefficient of $x^n$ in the expansion of $\log_a (1 + x)$ is
Let $x_1 , x_2,...., x_n$ be n observations, and let $\bar{x}$ be their arithmetic mean and $\sigma^2$ be the variance. Variance of $2x_1, 2x_2, ..., 2x_n$ is $4 \sigma^2$. Arithmetic mean $2x_1, 2x_2, ..., 2x_n $ is 4 $\bar{x}$ .
Bond enthalpies of $H_2, X_2$ and $HX$ are in the ratio $2 : 1 : 2$. If enthalpy of formation of $HX$ is $-50 \,kJ \,mol^{-1}$, the bond enthalpy of $H_2$ is
What is the value of n so that the angle between the lines having direction ratios $(1, 1, 1)$ and $(1, -1, n)$ is $60^{\circ}$ ?
The foot of the perpendicular from the point $(7, 14, 5)$ to the plane $2x + 4y - z = 2$ are
For the function $f\left(x\right)= \frac{x^{100}}{100} + \frac{x^{99}}{99} + ... \frac{x^{2}}{2} + x + 1 , $ f ' (1) = mf' (0), where m is equal to
Formation of ozone in the upper atmosphere from oxygen takes place by the action of
If $\sin^2 \theta + \sin^2 \phi = 1/2, \cos^2 + \cos^2 \phi = 3/2$, then $\cos^2 (\theta - \phi)$ is equal to
In how many ways can $5$ prizes be distributed among $4$ boys when every boy can take one or more prizes ?
In which case the $NO_2$ will attack at the meta position
The coefficient of $x^{20}$ in the expansion of $(1 + x^2)^{40} . (x^2 + 2 + \frac{1}{x^2})^{-5}$ is