List of practice Questions

In zinc blende structure, the coordination number of the cation is
The alloy of copper that contains zinc is
Sun is visible a little before the actual sunrise and until a little after the actual sunset. This is due to
The van't Hoff factor $i$ for a dilute aqueous solution of sucrose is
When a solution containing non-volatile solute is diluted with water
Which of the following compound is chiral?
Which one of the following amines cannot be prepared by Gabriel's synthesis?
If the equivalent capacitance between $P$ and $Q$ of the combination of the capacitors shown in figure below is $ 30\,\mu \,F $ , the capacitor $C$ is
Which of the following is a correct name according to IUPAC rules?
The particle that cannot be accelerated by a cyclotron is
Which of the following is the largest is size?
The $S.I$ unit of activity of a radioactive sample is
Position-time graph for motion with zero acceleration is
Phenol on heating with alcoholic $KOH$ and chloroform - undergoes
The correct order of reducing character of alkali metals is
Freundlich adsorption isotherm equation is
The best coagulant for the precipitation of $Fe ( OH )_{3}$ is
A car moving with a speed of $50 \,km\, h^{-1}$ can be stopped by applying brakes after moving atleast $6 \,m$. If the same car is moving at a speed of $100 \,km\, h^{-1}$ the minimum stopping distance is
Zeigler-Natta catalyst is used to prepare
The maximum power dissipated in an external resistance R, when connected to a cell of emf E and internal resistance r, will be
The value of $ \cos \frac{\pi }{7}.\,\cos \frac{2\pi }{7}.\,\cos \frac{4\pi }{7} $ is equal to
Two oxides of a metal contain $36.4 \%$ and $53.4 \%$ of oxygen by mass respectively. If the formula of the first oxide is $M _{2} O$, then that of the second is
The standard enthalpy of formation of $C_2H_{4(g)}, CO_{2(g)}$ and $H_2O_{(l)}$ are $52, -394$ and $-286\, kJ\, mol^{-1}$ respectively. Then the amount of heat evolved by burning $7\, g$ of $C_2H_{4(g)}$ is
A gardener pushes a lawn roller through a distance $ 20\,m $ . If he applies a force of $ 20\,kg\,wt $ in a direction inclined at $ 60^{\circ} $ to the ground, the work done by him is
Chemically unreactive three different gases $A, B$ and $C$ of molecular masses $16, 32$ and $64$ are enclosed in a vessel at constant temperature till equilibrium is reached. Which of the following statements is true?