HSC Science (Electronics) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Chemistry

Give VBT description of the bonding in a square planar complex [Cu(NH₃) ₄]²⁺. Show orbital diagrams for free metal ion and metal ion in the complex. Which hybrid orbitals are used by metal for bonding? State magnetic nature of the complex.

Which flower is an example of self cleansing? Explain.

Enthalpy of fusion of ice at 0°C and 1 atmosphere is 6.01 kJ mol ^{- 1} and enthalpy of evaporation of water at 0°C and 1 atmosphere is 45.07 kJ mo1 ^{- 1}. Calculate the enthalpy of sublimation of one mole of ice at 0°C and 1 atmosphere. Write the equation for the same.

Define solubility. How is it expressed?

Which highly effective and cost effective nanoparticles are used for water purification?

Draw structures 01 conjugate bases of monochloroacetic acid and dichloroacetic acid. Which one is more stabilized by -I effect?

Calculate the current strength (I) and number of moles of electrons required to produce 2.369 × 10⁻³ kg of Cu from CuS0₄ in one hour. (Given: Molar mass of Cu = 63 .5 gm/mol).

What is the action of aqueous bromine on aniline?

Write reactio between Cl₂ and water.

The solubility of silver sulphate is 1.85 x 10^-2 mol dm^-3. Calculate solubility product of silver sulphate.

Write cell reaction and calculate the potential (EMF) of the cell Zn(s) | Zn²⁺(0.08 M) || Cr³⁺ (0.1 M) Cr(s) at 298 K. 
\[\ce{E^0_{Zn} = - 0.76 V and E^0_Cr = - 0.74 V}\]

Give a valence bond description of the bonding in the high spin complex [MnCl₆]³⁻ Include orbital diagram for the free metal ion and the metal ion in the complex. Indicate which hybrid orbitals the metal ion uses for bonding. Specify the number of unpaired electrons.

Explain any two applications of nanomaterials.

Write any two difficulties of setting SHE (Standard Hydrogen Electrode).

A compound forms a hep structure. Calculate the number of octahedral voids in 0.4 mol. (NA = 6.022 × 10²³).

A compound forms a hep structure. Calculate the number of octahedral voids in 0.4 mol. (N_A = 6.022 × 10²³ )

Derive the relation between freezing point depression and molar mass of solute.

(CH₃)₄NI is an example of ______.

Octahedral complex have ______ hybridisation.

How sodium bicarbonate test is used to distinguish between carboxylic acid and phenol?