MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Chemistry

An element crystallizes in a bee lattice with cell edge of 500 pm. The density of the element is 7.5 g cm^-3. How many atoms are present in 300 g of metal?

Silver crystallizes in face centred cubic structure, if radius of silver atom is 144.5 pm. What is the edge length of unit cell?

Gold crystallizes in face centred cubic structure. If atomic mass of gold is 197 g mol^-1, the mass of unit cell of gold is ______.

When a system absorbs 8 kJ of heat and does 2.2 kJ of work on surrounding, calculate the internal energy change.

The standard electrode potential of Zn and Ni are - 0.76 V and - 0.25 V respectively. If the reaction takes place in the cell constructed between these two electrodes is spontaneous. What is the standard emf of the cell?

The major product formed when 2-bromobutane is treated with alcoholic KOH is ______.

The order of reactivities of the following alkyl halides for an S_N2 reaction is ______.

Select the compound which on treatment with nitrous acid liberates nitrogen.

Which among the following solid is a non-polar solid?

Which of the following statements is incorrect regarding the dehydrohalogenation of alkenes?

12 g of a nonvolatile solute dissolved in 108 g of water produces the relative lowering of vapour pressure of 0.1. The molecular mass of the solute is ______.

A catalyst lowers the activation energy of a certain reaction from 83.314 to 75 kJ mol⁻¹ at 500 K. What will be the rate of reaction as compared to uncatalysed reaction? Assume other things are equal.

The order of reactivity of the given haloalkanes towards nucleophiles is:

An ideal gas expands against a constant external pressure of 2.0 atmosphere from 20 litre to 40 litre and absorbs 10 kJ of heat from the surrounding. What is the change in the internal energy of the system?

(Given: 1 atm-litre = 101.3 J)

Which of the following compounds gives a dye test?

The standard EMF for the cell reaction,
\[\ce{Zn + Cu^{2+} -> Zn^{2+} + Cu}\], 
is 1.10 V at 25°C. The EMF of the cell reaction, when 0.1 M Cu²⁺ and 0.1 M Zn²⁺ solutions are used at 25°C is:

Which among the following equation represents Arrhenius equation?

The vapour pressure of a solvent A is 0.80 atm. When a non-volatile substance B is added to this solvent its vapour pressure drops to 0.6 atm. the mole fraction of B in the solution is ______.

Which of the following solutions will have the maximum lowering of vapour pressure at 300 K?

Which of the following in Baeyer's reagent?