List of practice Questions

Match List I with List II

List I Test		List II Functional group / Class of Compound
A	Molisch's Test	I	Peptide
B	Biuret Test	II	Carbohydrate
C	Carbylamine Test	III	Primary amine
D	Schiff's Test	IV	Aldehyde

Choose the correct answer from the options given below:

Which of the following compounds will not give Hinsberg's test

{C u}^{2 +} + 2 e^{-} \to C u, E^{0} = 0.337 V

{C u}^{2 +} + e^{-} \to {C u}^{+}, E^{0} = 0.153

Standard electrode potential,

E^{\circ}

for the reaction,

C u + e^{-} \to C u

, will be (in volts):

Identify the correct Lewis dot structure of NO^-₂.

Number of π bonds present in product B is:

π bonds present in product B is

ethoxy benzene reacts with HNO3/H2SO4

Chemical formula of compound present in tooth enamel?

S-I: Sulphur exists as S8 while oxygen exists as O2.
S-II: In oxygen, pπ-pπ bonding occurs while it is not effective in sulphur.

One litre solution of 0.2 M glucose is separated with its pure solvent with semi-permeable membrane, 0.1 moles of NaCl is added to the solution. The change in osmotic pressure of solution will be at 300 K _____ . (take R = 0.083)

Which of the following statements is incorrect?

In the DC-DC converter shown in the figure, the current through the inductor is continuous. The switching frequency is \( 500 \, \text{Hz} \). The voltage (\( V_o \)) across the load is assumed to be constant and ripple-free. The peak inductor current in amperes is (rounded off to the nearest integer).

A single-phase half-controlled bridge converter supplies an inductive load with ripple-free load current. The triggering angle of the converter is \( 60^\circ \). The ratio of the rms value of the fundamental component of the input current to the rms value of the total input current of the bridge is (rounded off to 3 decimal places).

At 700 K, equilibrium constant for the reaction:
\(H_2 (g) + I_2 (g) ⇋ 2HI (g)\)
is 54.8. If 0.5 mol L^–1 of HI(g) is present at equilibrium at 700 K, what are the concentration of H₂(g) and I₂(g) assuming that we initially started with HI(g) and allowed it to reach equilibrium at 700 K?

20R resistance wire is cut into 10 equal parts. Now each part first is connected in series and then in parallel. Find ratio of equivalent resistance in both cases (Rseries : Rparallel)

Find the equivalent resistance between terminal A and B for the given network.

the equivalent resistance between terminal A and B

The resistance \( R = \frac{V}{I} \) where \( V = (200 \pm 5) \, \text{V} \) and \( I = (20 \pm 0.2) \, \text{A} \). The percentage error in the measurement of \( R \) is:

A current i is flowing through the loop. The direction of the current and the shape of the loop are as shown in the figure.The magnetic field at the centre of the loop is,

\frac{μ_{0} i}{R}

[ MA = R , MB = 2R,

∠

Which of the following is metal compound semiconductor?

In the formula,

X = 3 Y Z^{2}, X

Z

have dimensions of capacitance and magnetic field respectively. What are the dimensions of

Y

in the MKSQ system?

Find ratio of magnetic field at point P to that at point Q. Point P is inside the solid cylinder and Q is outside the cylinder. Current is uniform through the crosssection of cylinder.

ratio of magnetic field at point P to that at point Q

In the pure inductive circuit, the curves between frequency

f

and reciprocal of inductive reactance

\frac{1}{X_{L}}

In a discharging RC circuit, at what time the electrical potential energy will become the half of its initial value? [in terms of time constant of RC circuit,]

A solenoid of 10 turns cross section area 36 cm² and of resistance 10 mΩ is placed in a magnetic field which is varying at a constant rate of 0.5 T/sec. Find power of heat dissipation.

The diameter of a sphere having mass 8.635 gm is measured by a vernier scale. 10 divisions of vernier scale coincide with 9 divisions of main scale and main scale division is 1 mm. If the reading of the main scale is 2 cm & 2nd division of vernier coincide with a main scale division, the density of the sphere is

A screw gauge with a pitch of 1 mm and a circular scale with 100 divisions is used to measure the thickness of the aluminium sheet. Negative zero error of 0.05 mm is there. What is the thickness of the sheet when main scale reading is 4 mm and 60th division coincides with the main scale line