HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Discuss S_N2 mechanism of methyl bromide using aqueous KOH.

The degree of dissociation of 0.1 M monobasic acid is 0.4%. Its dissociation constant is ______.

What is ozone umbrella?

What is EAN rule?

Define the colligative properties.

Name any two colligative properties.

Discuss β - elimination reaction.

Complete the following reaction sequences by writing the structural formulae of the organic compounds 'A', 'B' and 'C'.

\[\ce{2-Bromobutan ->[alc. KOH] A ->[][Br2] B ->[][NANH2] C}\]

Find EAN of Co³⁺ in Co [NH₃]₆³⁺.

Complete the following reactions giving major product.

\[\begin{array}{cc}
\ce{CH3}\phantom{................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{.................}
\end{array}\]

Write the unit of rate constant of zero order reaction.

Calculate the pH of the buffer solution containing 0.5 mol NaF and 0.015 mol HF per litre. [pKa = 3.1427].

What is the action of hydrochloric acid on the following?

NH₃

What is the action of hydrochloric acid on the following?

Na₂CO₃

Define and explain the S_N1 mechanism with a suitable example.

Define pOH.

Derive relationship between pH and pOH.

What is the action of H₂ on elements of group 17?

What is the action metal on elements of group 17?

If pH of a solution is 3.12, what would be the concentration of H⁺ ion?