NEET
Practice Test 10
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  • Solution

pH of a saturated solution of Ba(OH)2 is 12. The value of solubility product (Ksp)of Ba(OH)2 is :

  • Solution

Which of the following is least likely to behave as Lewis base ?

  • Solution

    BF3 behaves as lewis acid.

Which one of the following molecular hydrides acts as a Lewis acid?

  • Solution

    Boron in B2H6 is electron deficient.

In a buffer solution containing equal concentration of B– and HB, the Kb for B– is 10–10. The pH of buffer solution is:

  • Solution

    Kb= 10-10; Ka = 10-4 or pKa = 4
    For the buffer solution containing equal concentration of B– and HB
    pH = pKa + log 1
    pH = pKa = 4

  • Solution

    2C(s) + O2(g) ⇌ CO2(g)
    Δn = 2 – 1 = +1
    ∴ Kc and Kp are not equal.

The ionization constant of ammonium hydroxide is 1.77 × 10-5 at 298 K. Hydrolysis constant of ammonium chloride is:

  • Solution

Which of the following molecules acts as a Lewis acid ?

  • Solution

    (CH3)3 B - is an electron deficient, thus behave as a lewis acid

  • Solution

Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH ?

  • Solution

    The highest pH will be recorded by the most basic solution. The basic nature of hydroxides of alkaline earth metals increase as we move from Mg to Ba and thus the solution of BaCl2 in water will be most basic and so it will have highest pH.

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