List of practice Questions

The volume of a closed reaction vessel in which the following equilibrium reaction occurs is halved: \[ 2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g) \] \text{As a result,}

If \( \tan \theta = \sqrt{n} \) for some non-square natural number \( n \), then sec \( 2\theta \) is:

If \( z = x + iy \), \( z^{1/3} = a - ib \), then \( \frac{x}{a} = \frac{y}{b} = k \) is equal to:

If the coordinates at one end of a diameter of the circle \( x^2 + y^2 - 8x - 4y + c = 0 \) are \( (-3, -2) \), then the coordinates at the other end are:

The system of linear equations: \[ x + y + z = 0, \quad 2x + y - z = 0, \quad 3x + 2y = 0 \] \text{has:}

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to:

Among the following molecules, those having the same number of lone pairs on Xe are: (i) \( XeO_3 \) (ii) \( XeOF_4 \) (iii) \( XeF_6 \)

An alkene of molecular formula \( C_9H_{18} \) on ozonolysis gives \( 2 \)-dimethylpropanal and \( 2 \)-butanone, then the alkene is:

Glucose when heated with \( CH_3OH \) in presence of dry HCl gas gives \( \alpha \)- and \( \beta \)-methyl glucosides because it contains:

When acetylene is passed into methanol at 160-200°C in the presence of a small amount of potassium methoxide under pressure, the following is formed:

Which compound can exist in a dipolar (zwitter) state?

The rate constant is doubled when temperature increases from 27°C to 37°C. Activation energy in kJ is:

In the reaction, \( C_6H_5OH + NaOH \rightarrow \) (B) \( \rightarrow (C) \), the compound (C) is:

Calculate the energy needed to convert three moles of sodium atoms in the gaseous state to sodium ions. The ionization energy of sodium is 495 kJ/mol:

The uncertainty in position and velocity of a particle are \( 10^{-10} \, \text{m} \) and \( 5.27 \times 10^{-24} \, \text{ms}^{-1} \) respectively. Calculate the mass of the particle is (h = \( 6.625 \times 10^{-34} \, \text{Js} \)):

Choose the complex which is paramagnetic:

Phosphine is generally prepared in the laboratory:

The reaction \( 2NO(g) + O_2(g) \rightarrow 2NO_2(g) \) is of first order. If volume of the reaction vessel is reduced to \( \frac{1}{3} \) times, the rate of reaction would be:

Which are the starting materials for the preparation of the compound shown in the figure?

Which element gives the maximum number of oxides?

An organic compound 'A' has the molecular formula \( C_3H_6O \), it undergoes iodoform test. When saturated with dil. HCl it gives 'B' of molecular formula \( C_9H_{14}O \). A and B respectively are:

Here Z is

Calculate the entropy change in melting 1 mole of ice at 273 K, \( \Delta H_f^o = 6.025 \, \text{kJ/mol} \):

In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true?

At low pressure, the van der Waals equation is reduced to: