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

Answer in brief.

Write formulae of the following complex.

Dicyanoaurate (I) ion

Explain optical isomerism in 2-chlorobutane.

The IUPAC name of Na₃[AlF₆] is _____________

Write the IUPAC name of [Fe(CN)₆]^4– ion.

Write the IUPAC name of [Ni(CN)₄]^2–.

For the isomeric dihalobenzenes, melting point of __________

Optical activity of a molecule is associated with _______________

Write the relationship between radius of atom and edge length of fcc unit cell.

Explain optical activity of 2-chlorobutane.

Give the percentage of empty space in bcc lattice.

If the total volume of a simple cubic unit cell is 6.817 × 10^-23 cm³, what is the volume occupied by particles in the unit cell?

Find the number of atoms in the fcc unit cell.

Calculate the number of unit cells in 0.3 g of a species having density of 8.5 g/cm³ and unit cell edge length 3.25 × 10^-8 cm.

Derive the relationship between density of substance, its molar mass, and the unit cell edge length. Explain how you will calculate the number of particles, and a number of unit cells in x g of metal.

State Raoult’s law. 

What type of solutions exhibit positive deviations from Raoult’s law?

What is enthalpy change and volume change of mixing of two components forming an ideal solution?

The vapour pressures of pure liquids A and B are 0.600 bar and 0.933 bar respectively, at a certain temperature.
What is the mole fraction of liquid B in the solution when the total vapour pressure of their mixture is 0.8 bar?

Distinguish between ideal and non-ideal solutions.

What is the action of atmospheric oxygen on ethers?