List of practice Questions

In the following reaction the reagent A is,
\[ {Ar-N2^+X^- →[A] Ar-N2^+BF4^- →[\Delta] Ar-F + BF3 + N2} \]
In case of substituted aniline the group which decreases the basic strength is
Which of the following is NOT dihydric phenol?
Identify the product B in the following reaction
\[ {CH3COOH + C2H5OH →[H^+][-H2O] A →[H2/Ni] B} \]
Which of the following substances is NOT used for food preservation?
Which of the following oxyacids of sulphur contain S–O–S linkage?
Isochor is the graph plotted between
For the reaction,
\[ C_2H_5OH(l) + 3O_2(g) \rightarrow 2CO_2(g) + 3H_2O(l) \] Which among the following is true?
Van’t Hoff factor for $K_3[Fe(CN)_6]$ is $3.333$. What is its percentage dissociation in water?
Which among the following is an example of pseudo first order reaction?
Which mineral among the following contains zinc?
Which among the following groups has lowest priority in assigning R,S convention?
Which of the following set of compounds does NOT demonstrate the law of multiple proportion?
Which of the following has intramolecular hydrogen bonding?
Which of the following is a Wolff–Kishner reduction?
Identify the mineral of iron from the following.
A capacitor of unknown capacitance is connected across a battery of $V$ volt. The charge stored in it is $Q$ coulomb. When potential across the capacitor is reduced by $V'$ volt, the charge stored in it becomes $Q'$ coulomb. The potential $V$ is
Which cation from the following does NOT form a colourless compound? (Atomic number: Cu = 29, Ti = 22, Zn = 30, Sc = 21)
Which of the following properties is NOT a colligative property?
An electron moves in a circular orbit of radius $r$ with uniform speed $v$. It produces magnetic field $B$ at the centre of the circle. The magnetic field $B$ is proportional to
S.I. unit of emissive power of a body at a given temperature is
Two coherent light sources of intensity ratio $n$ are employed in an interference experiment. The ratio of the intensities of the maxima and minima in the interference pattern is $(I_1>I_2)$
In potentiometer experiment, the balancing length with cell $E_1$ of unknown e.m.f. is $\ell_1$ cm. By shunting the cell $E_1$ with resistance $R$ which is equal to internal resistance $r$ of the cell $E_1$, the balancing length $\ell_2$ is
When a lens of refractive index $\mu_1$ is placed in a liquid of refractive index $\mu_2$, the lens looks to be disappeared only if
A simple pendulum oscillates with an angular amplitude $\theta$. If the maximum tension in the string is twice the minimum tension, then $\theta$ is