List of practice Questions

At 300 K, vapour pressure of pure liquid A is 70 mm Hg. It forms an ideal solution with liquid B. Mole fraction of B = 0.2 and total vapour pressure of solution = 84 mm Hg. What is vapour pressure (in mm) of pure B?

What are X and Y in the following reaction sequence?

At what temperature (in K) the rms velocity of SO\(_2\) molecules is equal to rms velocity of O\(_2\) molecules at \(27 \, ^\circ\text{C}\)?
Among the following compounds, which one is not responsible for the depletion of ozone layer?
Of the following, the pair of physical quantities not having the same dimensional formula is:
A thin circular ring and a circular disc of equal mass are rolling without sliding. If their linear velocities are equal and the total kinetic energy of the disc is 6 J, then the total kinetic energy of the ring is:
The structure of the product 'Z' in the reaction sequence is: \[ \text{CHO} \] \[ \mid \] \[
When a wire made of material with Young's modulus Y is subjected to a stress S, the elastic potential energy per unit volume stored in the wire is
In a wire of radius 1 mm, a steady current of 2 A uniformly distributed across the cross-section of the wire is flowing. Then the magnetic field at a point 0.25 mm from the centre of the wire is
The device used for voltage regulation is
The composition of a sample of wustite is \( \text{Fe}_{0.93} \text{O}_{1.00} \). Percentage of iron in the form of \( \text{Fe}^{3+} \) ion is nearly:
The readings of the voltmeter and ammeter in the circuit shown in the diagram are respectively
readings of the voltmeter and ammeter
If the surface areas of two nuclei are in the ratio 9 : 49, then the ratio of their mass numbers is
A and B are ideal gases. At T(K), 2 L of A with a pressure of 1 bar is mixed with 4 L of B with a pressure of P\(_B\) bar in a 100 L flask. The pressure exerted by gaseous mixture is 0.1 bar. What is the value of P\(_B\) in bar?
One mole of ethanol (C₂H₅OH) was completely burnt in oxygen to form CO₂(g) and H₂O(l). What is the \(\Delta H_f^{\circ}\) (in kJ/mol) for this reaction?
Identify the ion (hydrated in solution) which is not correctly matched with its spin only magnetic moment (in BM) given in brackets:
In the given circuit, the internal resistance of the cell is zero. If \( i_1 \) and \( i_2 \) are the readings of the ammeter when the key (K) is opened and closed respectively, then \( i_1 : i_2 = \)
internal resistance of the cell is zero
A body starts from rest and accelerates uniformly at 2 m/s\(^2\). What is the distance covered in 5 seconds?
Two capacitors of capacitance 4 µF and 6 µF are connected in series and then connected to a 120 V battery. The energy stored in the system is:
Assertion (A): Algae will increase the level of dissolved oxygen in the immediate environment.
Reason (R): They form the food for aquatic animals.
Identify the correct option from the following:
Choose the correct statements among the following:
I. Quasi-fluid nature of lipids enables lateral movement of proteins.
II. Mitochondria and chloroplast constitute endomembrane system.
III. Phosphate granules are not membrane bound bodies.
IV. Centriole is a component in all cells.
Arrange the intermediate compounds of RUBP regeneration in correct sequence:

I. Ribulose-5-Phosphate
II. Erythrose-4-Phosphate
III. Fructose-6-Phosphate
IV. Sedoheptulose-7-Phosphate
V. Ribose-5-Phosphate
VI. Fructose-1,6-Bisphosphate
Pick the wrongly matched pair:

Study the following statements regarding osmoregulatory adaptations in marine and freshwater fish and identify the correct statements: 
Statements 
I. Marine fishes actively excrete excess salt through their gills. 
II. Freshwater fishes have glomerular kidneys. 
III. Marine fishes face the problem of exosmosis. 
IV. Freshwater fishes have salt-excreting chloride cells. 
 

The work to be done to blow a soap bubble of radius $3 \times 10^{-3}$ m is nearly
(Surface tension of soap solution = $20 \times 10^{-3}$ N m$^{-1}$)