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

Derive the equation : W = - P_extAV

Write features of Ellingham's diagrams

Explain why Mn²⁺ ion is more stable than Mn³⁺? (Given : Mn→ Z=25)

Write balanced chemical equations for action of potassium permanganate on Warm conc. sulphuric acid

What is the action of acidified potassium dichromate on - KI 

An antifertility drug is -

(a) Novestrol

(b) Histamine

(c) Vernal

(d) Equanil

Explain only reaction mechanism for alkaline hydrolysis of tert-butyl bromide

What are oxides?  Write different types of oxides with one example each.

Represent a cell consisting of Mg²⁺ | Mg half cell and Ag⁺
 | Ag half cell and write the cell reaction.
( `"E"_("Ag")^° = 0.799 "V", "E"_("Mg")^° = - 2.37 "V"`)

5 moles of helium expand isothermally and reversibly from a pressure 40 × 10^-5  N m^-2 to 4 × 10^-5 N m^-2  at 300 K. Calculate the work done, change in internal energy and heat absorbed during the expansion. (R = 8.314 J K^-1  mol^-1).

Write any ‘four points’ of difference between fluorine and other halogens.

What is the action of following reagents on glucose?
1. Bromine water
2. Hydroxylamine

Draw the structures of veronal and thymine. 

The ligand triethylenetetramine is _______.

The functional group present in triacylglycerol is _______.

Answer the following in brief.

Calculate the number of atoms in fcc unit cell.

Obtain the relationship between the density of a substance and the edge length of the unit cell.

An element with molar mass 27 g/mol forms a cubic unit cell with edge length of 405 p.m. If the density of the element is 2.7 g/cm³, what is the nature of the cubic unit cell?

Choose the most correct option.

The vapour pressure of a solution containing 2 moles of a solute in 2 moles of water (vapour pressure of pure water = 24 mm Hg) is ______.

Choose the most correct option.

Vapour pressure of a solution is _______.