List of top Chemistry Questions asked in Haryana PMT

When a number of thermocouple are joined in series, the thermo emf
The rate constant for a first order reaction is $60 \,s^{-1}$. How much time it will take to reduce the concentration of the reactant to $1 / 10^\text{ th}$ of its initial value?
Calculate the mass of urea $\left( NH _{2} CONH _{2}\right)$ required in making $2.5 \,kg$ of $0.25$ molal aqueous solution.
What is the mole fraction of benzene in solution containing $30\%$ by mass in carbon tetrachloride?
What will be the half-life period of a first order reaction with rate constant $k=5.5 \times 10^{-14} s^{-1}$ ?
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains
In the following sequence of reactions, the alkene gives the compound $B. B$ is $CH _{3}- CH = CH - CH _{3} \xrightarrow{ O _{3}} A \xrightarrow{ H _{2} O / Zn }B$
Which of the following amines gives carbylamine reaction?
The conductivity of $0.20 \,M\, K C l$ solution at $298\, K$ is $0.0248\, S\, cm ^{-1}$. What will be its molar conductivity?
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
The correct order of acidity is
Nylon-$6 6$ is obtained from
Which of the following is least volatile?
A metal nitrate reacts with $KI$ to give black precipitate which turns to orange on addition of $ KI $ . Metal is
Benzamide on reaction with $POCl_{3}$ gives
Which of the following is not oxidised by ozone?
Total number of lone pairs of electrons on $Xe$ in $XeOF_{4}$ is
$2$-acetoxy benzoic acid is
The ratio of rates of diffusion of helium and methane under same conditions of temperature and pressure will be
The number of radial nodes of $3\,s$ and $2\,p$ orbital are
Which is necessary for conversion of butane-$2$-one into propanoic acid?
Adsorption of gases on solid surface is exothermic since
A sodium salt on treatment with $ MgCl_{2}$ gives white precipitate on heating. The anion of sodium salt is