List of practice Questions

Bryophytes are known as amphibians of plant kingdom because

Fucoxanthin is characteristic pigment of

Mitospores of algae are differentiated by

Syngamy is the fusion of

Carpogonium is formed in

Which of the following is not present is thallus of Marchantia ?

Sex organs in pteridophytes are

Which is not true of Pinus

Which plays an important role in the dispersal of spores in Funaria?

The leaves of fern plants are called

The tallest tree speices of gymnosperms is

The weight of oxalic acid that will be required to prepare a $1000\, mL$ $\left(\frac{N}{20}\right)$ solution is

Equal weights of $CH_{4}$ and $H_{2}$ are mixed in an empty container at $25^\circ C$. The fraction of the total pressure exerted by $H_{2}$ is

An aqueous solution of oxalic acid dihydrate contains its 6.3 g in 250 ml. The volume of 0.1 N NaOH required to completely neutralize 10 ml of this solution

Number of atoms of $He$ in $100$ amu of $He$ (atomic wt. of $He$ is $4$) are :

A cubical region of side a has its centre at the origin. It encloses three fixed point charges, $- q$ at $(0,- \frac{a}{4} ,0), + 3q$ at $(0, 0, 0)$ and $- q$ at $(0,+ \frac{a}{4},0)$. Choose the correct option(s).

An electrostatic field line never form closed loop. Electrostatic field is a conservative field.

If one root is square of the other root of the equation $x^2 + px + q = 0$, then the relations between p and q is

Let $ \alpha ( a) \, and \, \beta (a) $ be the roots of the equation $ (\sqrt [3] {1 + a} - 1) x^2 - (\sqrt {1 + a} - 1) x + (\sqrt [ 6] {1 + a} - 1) = 0$, where a > - 1. Then, $ lim_{a \to 0^+ } $, $ \alpha (a) \, and \, lim_{a \to 0^+ } \beta $ (a) are

Let $f:(-1,1)\rightarrow$ R be such that $f(cos 4 \theta)=\frac{2}{2-sec^2 \theta}$ for $\theta \in \Bigg(0,\frac{\pi}{4}\Bigg)\cup\Bigg(\frac{\pi}{4},\frac{\pi}{2}\Bigg).$ Then, the value(s) of $f\Bigg(\frac{1}{3}\Bigg)$ is are

$1\,C$ electricity deposits

The ratio of radius of two bubbles is $2:1$. What is the ratio excess pressure inside them?

A large number of droplets, each of radius, $r$ coalesce to form a bigger drop of radius, $R$. An engineer designs a machine so that the energy released in this process is converted into the kinetic energy of the drop. Velocity of the drop is ($T=$ surface tension, $\rho=$ density)

Let A and B be real matrices of the form $\begin{bmatrix}\alpha&0\\ 0&\beta\end{bmatrix}$ and $\begin{bmatrix}0&\gamma\\ \delta&0\end{bmatrix}$, respectively. AB - BA is always an invertible matrix. AB-BA is never an identity matrix.

A charge of total amount $Q$ is distributed over two concentric hollow spheres of radii $r$ and $R (R > r)$ such that the surface charge densities on the two spheres are equal. The electric potential at the common centre is