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

Derive the expression for molar mass of solute in terms of boiling point elevation of solvent.

Explain the osmotic pressure of a solution with the help of a thistle tube.

Explain the phenomenon of osmosis.

A solution containing 3 g of solute A (M = 60 g/mol) in 1 L solution is isotonic with a solution containing 8.55 g of solute B in 500 mL solution. What is the molar mass of B?

In biochemical system, pH of blood in our body is maintained due to the following buffer:

The pK_b of weak base BOH [K_b(BOH) = 1 × 10^-5] will be ______.

Name the buffer which is used to maintained pH of 8 to 10 for precipitation of cations III A group in qualitative analysis.

Write the formula to calculate pH of buffer solution.

Define Osmosis.

Define buffer solution.

Explain the types of buffer solutions.

Write one application of the following buffer:

Citrate buffer

Write one application of the following buffer:

`"HCO"_3^-  + "H"_2"CO"_3`

Write one application of the following buffer:

NH₄OH + NH₄Cl

A buffer solution contains 0.3 mol dm^–3 NH₄OH (K_b = 1.8 × 10^–5) and 0.4 mol dm^–3 NH₄Cl. Calculate pOH of the solution.

_____________ reaction is used to synthesize straight alkyl substituted benzenes.

Addition of sodium bisulphite to ethanol is ____________ type of reaction.

The following compounds will give positive Fehling’s test.

Write the name of the product when ketones react with 1,2-diol in presence of dry HCl.

Write another name of disproportionation reaction?