List of top Questions asked in Punjab PMET

Codon is present in
At what depth below the surface of the earth, acceleration due to gravity $g$ will be half its value $1600\,km $ above the surface of the earth?
One mole of water at $100^{\circ} C$ is converted into steam at $100^{\circ} C$ at a constant pressure of $1\, atm .$ The change in entropy is [heat of vaporisation of water at $100{ }^{\circ} C =540\,cal / gm ]:$
The emf of a galvanic cell, with electrode potential of zinc $ =+0.76\,V$ and that of copper $ =0.34\,V $ , is:
The maximum number of electrons present in an orbit $ l=3 $ , is :
Quartz is a crystalline variety of:
The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is:
The ore camalite is represented by structure:
Glucose and bromine water reacts to produce:
Acetaldehyde gives orange coloured precipitate on treatment with
A perfectly black body is one where
A particle moves from position $r_1 = 3 \hat i + 2 \hat j - 6 \hat k$ to position $r_2 = 14 \hat i + 13 \hat j + 9 \hat k$ under action of force $F = 4 \hat i + \hat j + 3 \hat k$ N. The work done will be
If $\vec{A} \times \vec{B}|=| \vec{A} \cdot \vec{B} \mid$ then the angle between $\vec{A}$ and $\vec{B}$ will be :
If $\left|\vec{A}+\vec{B}\right|=\left|\vec{A}-\vec{B}\right|$, then the angle between $\vec{A}$ and $\vec{B}$ will be
Two open organ pipes of length $25\, cm$ and $25.5\, cm$ produce $0.1$ beat/sec. The velocity of sound will be :
Which one of the following is different from others?
A man of weight $ 75\,kg $ is standing in an elevator which is moving with an acceleration of $5\,m/s^{2}$ in upward direction the apparent weight of the man will be: $ (g=10\,m/s^{2})$
In achromatic combination of lenses is formed by joining :
In Bohr?s model, the atomic radius of the first orbit is $r_0$ . The radius of the third orbit, is
The effective acceleration of a body, when thrown upwards with acceleration $ a $ will be:
A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity $ 20000\,\,V/m $ . If mass of the particle is $ 9.6\times {{10}^{-16}}kg $ , the charge on it and excess number of electrons on the particle are respectively $ (g=10\,m/s^2) $ :
The half-life of a radioactive substance is $3.6$ days. How much of $ 20\,\,mg $ of this radioactive substance will remain after $36$ days:
If vibration of string are to be two times, then tension in the string must be made:
Volume of $ C{{O}_{2}} $ obtained from complete decomposition of $ 20\,\,g\,\,CaC{{O}_{3}} $ at STP is:
The correct order of stability of carbocations, is: