List of top Questions asked in Haryana PMT- 2010

The concentration of hydronium ions in a cup of black coffee is $1.3 \times 10^{-5} M$. What will be the $pH$ of the coffee?

In Lucas test an alcohol react immediately and gives insoluble chloride. The alcohol is

The type of hybridisation of carbon atom in graphite, diamond and Buckminster fullerene are respectively

Nylon-$6 6$ is obtained from

The correct order of acidity is

Which of the following is least volatile?

Air is filled at $60^{\circ} C$ in a vessel of open mouth. The vessel is heated to a temperature $T$ so that $1/4^\text{th}$ part of air escapes. Assuming the volume of the vessel remaining constant, the value of $T$ is

A hydrogen atom emits a photon corresponding to an electron transition from $n=5$ to $n=1$. The recoil speed of hydrogen atom is almost (mass of proton $\approx 1.6 \times 10^{-27} \,kg$ )

A bullet of mass $m$ moving with velocity $v$ strikes a suspended wooden block of mass $M$. If the block rises to a $S$ height the initial velocity of the block will be

A body falls freely from the top of a tower. It covers $36\%$ of the total height in the last second before striking the ground level. The height of the tower is

The fundamental frequency of a closed pipe is $220 \,Hz$. If $\frac{1}{4}$ of the pipe is filled with water, the frequency of the first overtone of the pipe now is

A battery is connected to a uniform resistance wire $AB$ and $B$ is earthed. Which one of the graphs below shows how the current density $J $ varies along $AB$?

A winding wire which is used to frame a solenoid can bear a maximum $10\, A$ current. If length of solenoid is $80\, cm$ and its cross-sectional radius is $3\, cm$ then required length of winding wire is $(B=0.2\, T)$