List of top Chemistry Questions asked in Punjab PMET

The conjugate acid of $NH_{3}$ ion is:

Codon is present in

The maximum number of electrons present in an orbit $ l=3 $ , is :

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:

Quartz is a crystalline variety of:

Glucose and bromine water reacts to produce:

The ore camalite is represented by structure:

The number of atoms present in unit cell of a monoatomic substance of simple cubic lattice is:

Acetaldehyde gives orange coloured precipitate on treatment with

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:

The $ IUPAC $ name of the following compound is:

DNA is a polymer of

The shape of an orbital is determined by :

Oxidation number $ Fe $ in $ {{K}_{3}}[Fe{{(CN)}_{6}}] $ is:

The enthalpies of all elements in their standard states are:

Which of the following turns potassium dichromate paper green?

The following compound cannot exhibit: $ C{{H}_{3}}CH=CH-CH(OH)\cdot COOH $

Which of the following order of ionisation energy is correct?

The correct order of stability of carbocations, is:

Which of the following turns potassium dichromate paper green?

For the reaction A$\to$ B, the rate law expression is rate = k [A], Which of the following statements is incorrect ?