HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

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?

The value of Δ U is ______ when 2 kJ of heat is released and 6 kJ of work is done on the system.

The mole fraction of the solute molal aqueous solution is:

What is the colour of Cu⁺ ion?

How much vacant space is present in hep crystal lattice?

What is zero order reaction?