List of practice Questions

Which one of the following is not a common component of photo-chemical smog ?

A coil of inductive reactance $1/ \sqrt{3}\, O$ and resistance $1 \, \Omega$ is connected to a $200\, V$, $50\,Hz \,A.C.$ supply. The time lag between maximum voltage and current is

Which of the following is not a biodegradable polymer ?

The point on the curve $y^2 = x$ where the tangent makes an angle of $\pi /4$ with X-axis is

If $A = 2 \hat{i} + 3 \hat{j} + 8 \hat{k}$ is perpendicular to $B= 4 \hat{i} + 4 \hat{j} + \alpha \hat{k}$, then the value of $\alpha$ is

Two balls are thrown simultaneously in air. The acceleration of the centre of mass of the two balls when in air,

In a nuclear reactor the function of the Moderator is to decrease

The magnetic field at the center of a current carrying loop of radius $0.1\, m$ is $5 \sqrt{5}$ times that at a point along its axis. The distance of this point from the centre of the loop is

The eccentricity of the ellipse $\frac{x^2}{36} + \frac{y^2}{16} = 1$ is

Which of the following atoms should have the highest $1^{\text{st}]$ electron affinity?

Let $A(2, -3)$ and $B (-2, 1)$ be two angular points of $\Delta ABC$. If the centroid of the triangle moves on the line $2x + 3y = 1$, then the locus of the angular point $C$ is given by

Let $f(x) = x^{13} + x^{11} + x^9 + x^7 + x^5 + x^3 + x + 19$. Then $f(x) = 0$ has

The closed and open organ pipes have same length. When they are vibrating simultaneously in first overtone, produce three heats. The length of open pipe is made $\frac{1}{2}^{nd}$ and closed pipe is made three times the original, the number of beats produced will be

Transforming to parallel axes through a point $(p, q)$, the equation $2x^2 + 3xy + 4y^2 + x + 18y + 25 = 0$ becomes $2x^2 + 3xy + 4y^2 = 1$. Then

The locus of the mid-points of the chords of the circle $x^2 + y^2 + 2x - 2y - 2 = 0$ which make an angle of $90�$ at the centre is

What is the actual volume occupied by water molecules present in $20 \, cm^3$ of water ?

Aldehydes or ketones when treated with $\ce{C_6H_5 - NH - NH_2}$, the product formed is

Solubility of which among the following solids in water changes slightly with temperature ?

Identify the weakest oxidising agent among the following.

Which among the following compounds does not act as a reducing agent ?

In assigning $R-S$ configuration which among the following groups has highest priority ?

The amino acid which is basic in nature is

The colour and magnetic nature of manganate ion $(MnO^{2-}_4)$ is

The molality of solution containing $15.20\, g$ of urea, (molar mass = $60$) dissolved in $150 \,g$ of water is

The osmotic pressure of solution containing $34.2 \,g$ of cane sugar (molar mass = $342 \, g \, mol^{-1}$) in 1L of solution at $20^{\circ} C$ is (Given, $R = 0.082 \, L \, atm \, K^{-1} \, mol^{-1}$)