List of practice Questions

A block of mass 2 kg is free to move along the x-axis. It is at rest and from t = 0 onwards it is subjected to a time-dependent force F(t) in the x direction. The force F(t) varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is
A thin wire of mass M and length L is bent to form a circular ring. The moment of inertia of this ring about its axis is
A cylinder of height 1m is filled with water. If a small orifice is made at a height of 0.25 m from the ground, the horizontal range of water stream will be :
The major organic product formed from the following reaction is
Phenol + Aniline $ {Phenol + Aniline ->[{C_6H_5N_2^+Cl^-}][{KOH}] Product (P) (Major)}$ Major product (P) will be
For the following amines. The correct order of basic strength is
The correct order of basic strength is
(2) CH-CHO (3) p-CH-CH-CHO (4) p-CHO-CH-CHO Correct order for nucleophilic addition reaction :
Find out the products of the reaction.
Find the end product of the following reaction.
$C_7H_{10}(A)$ reacts with $CH_3MgBr$ to give a compound, $C_8H_{14}0$ which gives the iodoform test, then find out the structure A
Select the correct set of answer.
When $Ag^+$ reacts with excess of sodium-thiosulphate then he obtained species having charge and geometry respectively :
A point mass $M$ moving with a certain velocity collides with a stationary point mass $M/2$. The collision is elastic and in one-dimension. Let the ratio of the final velocities of $M$ and $M/2$ be $x$. The value of $x$ is
Which of the following is not the property of laser beams?
Which of the following alcohol is dehydrated most easily by concentrated $ {H_2SO_4}$
What is the correct volume of equilibrium constant for the following reaction at 400 K if the values of $\Delta H^{\circ}$ is 77.5 kJ $mol^{-1}$ and $ {\Delta S^{\circ} = 135 \; JK^{-1} \; mol^{-1}}$ $ {2NOCl{(g)} <=> 2NO{(g)} + Cl_2{(g)}}$
The value of $\sin 20^{\circ} \; \sin 40^{\circ} \; \sin 80^{\circ} $ equals
The value of $20! + \frac{21!}{1!} + \frac{22!}{2!} + ..... + \frac{60!}{40!} $ is
The unit of self inductance is
The reaction $ { P_4 + 3NaOH + 3H_2O \to 3NaH_2PO_2 + PH_3} $ is an example of
The phase difference between two waves $x_1 = A \; \sin (\omega t + \frac{\pi}{6} )$ and $x_2 = A \cos \omega t $ is
The normal dehydrating agent, used in a laboratory is
The dimensional formula of Reynold?? number is same as
The correct decreasing order of the boiling points of compounds $ {H_2O, HF}$ and $ {NH3}$ is
Find the major product (Considering E as the electrophile) when the following substrate is subjected to electrophilic aromatic substitution