List of practice Questions

The major product of the following reaction is

In the x-ray reflection (n=1), the distance between two parallel planes of NaCl is 280 pm and diffraction angle is 5.2°. What is the wavelength of its light radiation?

When \(10^{-3} \, M\) solution of glucose in water freezes at -0.0186°C, then at what temperature \(10^{-3} \, M\) solution of NaCl will freeze?

Molar depression constant (\(K_f\)) is dependent on

A first-order reaction has the rate constant of \(1.15 \times 10^{-3} \, \text{s}^{-1}\). The time required to reduce 10 g of reactant to 6 g is \(x \times 10^2\) sec. What is the approximate value of \(x\)?

Given below are two statements Assertion (A): Conductivity of an electrolyte decreases on dilution Reason (R): On dilution number of ions per unit volume increases The correct answer is

In which of the following, the sol is not correctly matched with respect to its charge?

Observe the following equilibrium at T(K) \[ H_2(g) + I_2(g) \rightleftharpoons 2HI(g) \] Which one of the following does not disturb the above equilibrium?

Observe the following solutions: \[ \text{I. Black coffee} \quad \text{II. 0.2M NaOH} \quad \text{III. Lemon juice} \] \[ \text{IV. Lime water} \quad \text{V. Human Saliva} \quad \text{VI. Tomato juice} \] The number of solutions with pH less than 7 is

Among the following, the correct statement is

Two alkali halide salts, \[ \text{ACl} \] and \[ \text{BCI} \] gave crimson red and violet in their flame test respectively. A and B are respectively

The number of water molecules present in borax, kernite and bauxite respectively are

Given below are two statements Assertion (A): The enthalpy of formation of graphite is taken as zero. Reason (R): Graphite is thermodynamically most stable allotrope of carbon. The correct answer is

Among the following organic halides in the increasing order of their dehydrohalogenation reactions in the presence of alcoholic KOH

The correct order of C − O bond length in CO, CO2−3, CO2 is

The P − P bond angle in P4 and S − S bond angle in cyclo S8 molecule are respectively

At 300 K, the compressibility factor of 1 mole of a gas is 1.1. Its pressure is 2.706 atm. What is its volume in L? (Given R = 0.082 L atm mol$^{-1}$ K$^{-1}$)

At T (K) and pressure P, the diffusion rate of an ideal gas is 120 mL min$^{-1}$. What is the time taken (in sec.) for 3000 mL of this gas for diffusion at the same temperature and pressure?

Observe the following reaction \[ xS_8 (s) + yOH^-(aq) \to zS^{2-}(aq) + 2S_2O_3^{2-}(aq) + 6H_2O(l) \] x, y and z are respectively.

If \( \Delta G \) and \( \Delta S \) for the reaction \( A(g) \to B(g) + 2C(g) \) at 2000 K are -40 kJ mol$^{-1}$ and 0.22 kJ K$^{-1}$ mol$^{-1}$, respectively, the change in internal energy for the same reaction approximately (in kJ mol$^{-1}$) is?

If 100 L of an ideal gas at a pressure of 2 atm is compressed isothermally and reversibly to a final volume of ‘X’ L releases -460.6 L atm heat, the final volume ‘X’ (in L) is

The device that can detect optical signals is

The load resistance and the base-emitter voltage of a transistor in CE configuration are 5 kΩ and 0.02 V respectively. If the collector current is 2 mA, then its voltage gain is

The process of retrieval of information from the carrier wave

The number of d-electrons in \( \text{Cr}^{3+} \) ion (\( Z = 24 \)) is