List of top Chemistry Questions asked in MHT CET

Electrolysis of dilute aqueous $NaCl$ solution was carried out by passing $10$ milli ampere current. The time required to liberate $0.01$ mol of $H_2$ gas at the cathode is: ($1$ Faraday $=96500Cmo{l}^{-1}$)

The tendency of a reaction to take place spontaneously is greatest when the reaction is:

The melting point of particles in nano form ___________

When $10ml$ of $0.2M$ solution of an acid is added to $250ml$ of a buffer solution with $pH=6.34$, the $pH$ of the solution becomes $6.32$. The buffer capacity of the solution is:

Taking chromium and arsenic, which are toxic, out of pressure-treated wood, and using new less toxic chemicals for bleaching paper, are examples of___________.

Solid $Ba{\left({NO}_3\right)}_2$ is gradually dissolved in a $1.0\times {10}^{-4}M{Na}_2{CO}_3$ solution. At which concentration of ${Ba}^{2+}$, precipitate of ${BaCO}_3$ begins to form?$(K_{sp}$ for ${BaCO}_3=5.1\times {10}^{-9})$

In the presence of a catalyst, the heat evolved or absorbed during the reaction _______.

Given the solubility curves of ${\mathrm{KNO}}_3$ and $\mathrm{KCl}$, which of the following statements is not true?

The pH of a 10 ml aqueous solution of HCl is 4. The amount of water to be added to this solution in order to change its pH from 4 to 5 is:

The enthalpy and entropy change for the reaction:${\mathrm{Br}}_2(l)+{\mathrm{Cl}}_2(\mathrm{g})\to 2\mathrm{BrCl}(\mathrm{g})$ are $30\mathrm{kJ}{\mathrm{mol}}^{-1}$ and $105{\mathrm{JK}}^{-1}{\mathrm{mol}}^{-1}$ respectively.The temperature at which the reaction will be in equilibrium is:

A current of $2$ amp when passed for $5$ hours through a molten salt deposits $22.2\mathrm{g}$ of metal of atomic mass $177$. The oxidation state of the metal in the metal salt is:

What is the name of the above reaction?

When you heat a sample of gas, what happens to the particles that make up the gas?

If benzene in solution containing 30% by mass in carbon tetrachloride, calculate the mole fraction of benzene.

The number of moles of electrons passed when a current of $2A$ is passed through a solution of electrolyte for $20$ minutes is:

Which of the following carboxylic acid is highly insoluble in water?

In ___________, a reaction product is itself a catalyst for that reaction leading to positive feedback.

In nitroprusside ion, the iron and NO exist as Fe(II) and $N{O}^{+}$ rather than Fe(III) and NO. These forms can be distinguished by:

Hybridization of $\mathrm{Fe}$ in ${\mathrm{K}}_3[\mathrm{Fe}(\mathrm{CN}{)}_6]$ is:

Which of the following is Baeyer’sreagent?

If we assume that one-sixth the mass of an atom of ${}^{12}C$ isotope is taken as the reference, the mass of one molecule of oxygen will:

Which of the following given elements is the least reactive among all other elements? 

Identify the element with the atomic number 10.

A catalyst is added to a reaction to increase the rate of reaction. Which of the following statements is correct?

Which of the following compounds give(s) positive test with Tollens' reagent?A. Carboxylic acidB. AlcoholC. Alpha hydroxy ketonesD. Aldehydes