NEET
Practice Test 4
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In the equation I2 + I– ⟶ \(I_{3}^{-}\), Lewis base is

  • Solution

    I- is electron donor. Hence it is Lewis base.

Species acting as both Bronsted acid and base, is

  • Solution

    (HSO4)- can accept and donate a proton
    (HSO4)- + H+ ⇌ H2SO4 (acting as base)
    (HSO4)- – H+ ⇌ SO42-. (acting as acid)

In which of the following cases, pH is greater than 7?

  • Solution

Which one of the following compounds is not a protonic acid?

  • Solution

    B(OH)3 does not provide H+ions in water instead it accepts OH– ion and hence it is Lewis acid.

    B(OH)3 + H2O ⇌ [B(OH)4]- + H+

Solution of 0.1 N NH4OH and 0.1 N NH4Cl has pH 9.25.Then find out pKb of NH4OH

  • Solution

A base when dissolved in water yields a solution with ahydroxyl ion concentration of 0.05 mol litre-1. The solution is

  • Solution

    Given :Hydroxyl ion concentration
    [OH–] = 0.05 mol L–1.
    We know that
    [H+][OH–] = 1 × 10-14

  • Solution

    Le chatelier principle is not applicable to solid-solid equilibrium.

Solubility product of a salt AB is 1 × 10–8 in a solution in which the concentration of A+ions is 10–3M. The salt will precipitate when the concentration of B–ions is kept

  • Solution

  • Solution

    H2O(g) ⇌ H2(g) + 1/2O2(g)
    In this reaction volume is increasing in the forward direction. So on increasing temperature reaction will proceed in forward direction

The reaction A + B ⇌ C + D + heat, has reached equilibrium. The reaction may be made to proceed forward by

  • Solution

    Exothermic reaction is favoured by low temperature to proceed in forward direction.

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