NEET (UG) entrance exam Question Bank Solutions

In the Lassaigne's test for the sulphur in an organic compound, the violet colour is obtained due to the formation of ______.

Carbon monoxide is poisonous because it ______. 

Which of the following compounds will be suitable for Kjeldahl's method for nitrogen estimation? 

Crystalline CsCl has density 3.988 g cm^-3. The volume occupied by single CsCl pair in the crystal will be ______.
(Molar mass CsCl = 168.4 g/mol)

NaCl, MgCl₂ and CaSO₄ are known as ______.

Molal elevation of boiling point constant is the elevation of boiling point produced by ______

Which alkene on ozonolysis does NOT produce formaldehyde? 

Two students X and Y report the mass of the same substance as 7.0 g and 7.00 g respectively, which of the following statement is correct?

The liquified gas that is used in dry cleaning along with a suitable detergent is ______. 

Green chemistry means such reactions which ______.

Proteins are condensation polymers of:

Soft drinks and baby feeding bottles are generally made up of ______.

In the reaction, alcohol + diazomethane → ether + N₂; the ether cannot be ______.

Primary, secondary and tertiary amines may be separated by using ______.

Choose the correct option for a graphical representation of Boyle’s law, which shows a graph of pressure vs. volume of a gas at different temperatures:

For a reaction, A `→` B, enthalpy of reaction is −4.2 kJ mol⁻¹ and enthalpy of activation is 9.6 kJ mol⁻¹. The correct potential energy profile for the reaction is shown in option.

Identify the compound that will react with Hinsberg’s reagent to give a solid which dissolves in alkali.

Identify the compound that will react with Hinsberg’s reagent to give a solid which dissolves in alkali.

For a reaction, A `→` B, the enthalpy of reaction is −4.2 kJ mol⁻¹ and the enthalpy of activation is 9.6 kJ mol⁻¹. The correct potential energy profile for the reaction is shown in the option.

Assertion: The presence of nitro group at m-position (with respect to halogen atom) greatly activates the haloarenes towards nucleophilic substitution reactions.

Reason: In the case of m-substituted haloarenes, there is no negative charge at m-position in the resonating structures.