List of practice Questions

What will be the final product in the following reaction sequence: \[ \text{CH}_3\text{CH}_2\text{CN} \xrightarrow{\text{H}^+ / \text{H}_2\text{O}} A \xrightarrow{\text{NH}_3} B \xrightarrow{\text{NaOBR}} C \]

In a set of reactions, acetic acid yields a product D: \[ \text{CH}_3\text{COOH} \xrightarrow{\text{SOCl}_2} \text{Benzene} \xrightarrow{\text{AlCl}_3} (B) \] \[ \text{HCN} \xrightarrow{\text{(C)}} \text{HOH} \xrightarrow{\text{H}_2\text{O}} (D) \] The structure of \( D \) would be:

In fructose, the possible optical isomers are:

The increasing order for the values of e/m (charge/mass) is:

In which of the following pairs both the ions are coloured in aqueous solutions?

The total number of possible isomers for square-planar \( \text{[Pt(Cl)(NO}_2)(NO_3)(SCN)]^{2-} \) is:

For the reaction, \[ 2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g), \] \[ \Delta H = -57.2 \, \text{kJ/mol} \quad \text{and} \quad K_c = 1.7 \times 10^{16} \] Which of the following statement is INCORRECT?

The half-life of a reaction is inversely proportional to the square of the initial concentration of the reactant. Then the order of the reaction is:

To deposit 0.634 g of copper by electrolysis of aqueous cupric sulphate solution, the amount of electricity required (in coulombs) is:

In the following skew conformation of ethane, the \( H' - C - C - H'' \) dihedral angle is:

What is the product of the following reaction?
Hex-3-ynal + (i) NaBH\(_4\), (ii) Pb\(_3\), (iii) Mg/ether, (iv) CO\(_2\)/H\(_2\)O → ?

In the following sequence of reactions, \[ \text{CH}_3\text{CH}_2\text{OH} \xrightarrow{P_1,2} A \xrightarrow{\text{Mg/ether}} B \xrightarrow{\text{HCHO}} C \xrightarrow{H_2O} D \] The compound D is:

Which of the following reactions can produce aniline as the main product?

Secondary structure of protein refers to:

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity of 17 m/s. The apparent change in the wavelength of sound heard by the observer is (speed of sound in air = 340 m/s):

Consider the following reactions: \[ \text{NaCl} + \text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 (\text{Conc.}) \rightarrow (A) + \text{Side products} \] \[ (B) + \text{H}_2\text{SO}_4 (\text{dilute}) + \text{H}_2\text{O}_2 \rightarrow (C) + \text{Side products} \] The sum of the total number of atoms in one molecule each of (A), (B) and (C) is __________.

Xenon hexafluoride on partial hydrolysis produces compounds 'X' and 'Y'. Compounds 'X', 'Y' and the oxidation state of Xe are respectively:

The edge length of unit cell of a metal having molecular weight 75 g/mol is 5 Å which crystallizes in cubic lattice. If the density is 2 g/cc, then find the radius of the metal atom. (\( N_A = 6 \times 10^{23} \)) Give the answer in pm.

Consider the following statements: I. Increase in concentration of reactant increases the rate of a zero order reaction. II. Rate constant \( k \) is equal to collision frequency if \( E_a = 0 \). III. Rate constant \( k \) is equal to collision frequency if \( E_a = \infty \). IV. \( \ln k \) vs \( T \) is a straight line. V. \( 1/T \) vs \( \ln k \) is a straight line. Correct statements are:

The following circuit represents

A particle of mass 10 kg is moving with a velocity of 5 m/s. The kinetic energy of the particle is:

The root mean square velocity of hydrogen molecules at 300 K is 1930 meters/second. The velocity of oxygen molecules at 1200 K will be:

A magnetic field of 5 T is applied perpendicular to a coil with 5 turns. The induced emf in the coil is 10 V. The rate of change of magnetic flux is:

A parallel plate capacitor with air between the plates has a capacitance of 3 μF. Calculate the capacitance if the distance between the plates is reduced by half and the space between them is filled with a substance of dielectric constant \( k \).

A body executing SHM has displacement \( y = A \cos \omega t \). Identify the graph which represents the variation of potential energy (PE) as a function of time \( t \) and displacement.