When dilute hydrochloric acid is added to sodium chromate solution the colour changes to :

Salicylaldehyde can be prepared by treating phenol with

The vapour pressure of a solution is 2985 \(\text{Nm}^{-2}\) when 5 g of a non-electrolyte is added to 100 g of water at a particular temperature.
The vapour pressure of pure water at this temperature is 3000 \(\text{Nm}^{-2}\).
The molecular mass of the solute is

Answer the question on the basis of passage given below:
Aldehydes are generally more reactive than ketones in nucleophilic addition reactions due to steric and electronic reasons. Sterically, the presence of two relatively large substituents in ketones hinders the approach of nucleophile to carbonyl carbon more than aldehydes having only one such substituent Electronically aldehydes are more reactive than ketones because two alkyl groups reduce the elctrophilicity of the carbonyl more effectively than in former.
Write the reaction sequence when phthalic acid reacts with ammonia.


Choose the correct answer from the options given below:

For the first order reaction :
(A) The degree of dissociation is equal to \((1 – e^{-kt})\)
(B) A plot of reciprocal concentration of the reactant v/s time gives a straight line
(C) The time taken for the completion of 75\% reaction is thrice the half life of the reaction
(D) 1st order reaction never completes
Choose the correct answer from the options given below :

The reaction in which an amide is treated with bromine in presence of ethanolic solution of sodium hydroxide is called

Fehling solution A and Fehling solution B are:

The solution set of the inequation \(\frac{7+5 x}{4} \geq \frac{x}{3}-10, x \in R\) is :

The voltage sensitivity of a voltmeter can be increased by :
(A) decreasing the resistance of the voltmeter
(B) increasing the resistance of the voltmeter
(C) decreasing the torsional constant of spring
(D) increasing the number of turns of the coil
(E) taking a strong permanent magnet
Choose the correct answer from the options given below :

Amniocentesis should not be used for:

The solution of LPP :
Min. \(z=100 x+400 y\)
s.t. \(x+2 y \geq 8\)
\(2 x+5 y \leq 20\)
\(x \geq 0, y \geq 0\)
occurs at :

The disease phenylketonuria is caused by mutation in the gene that codes for -

Choose the correct statement.