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

Write the electronic configuration of the following element:

Krypton (Z = 36)

Write cathode and anode reaction in a fuel cell.

Baeyer’s reagent is -'

(a) acidified potassium dichromate

(b) alkaline potassium dichromate

(c) alkaline potassium permanganate

(d) acidified potassium permanganate

What are isotonic solutions? Explain with one example.

Oxidation states of scandium are ___________.

In Van Arkel method for refining zirconium or titanium, the halogen used is __________.

Write the molecular formula of noverstrol.

What are ethers?

How many faradays of electricity are required to produce 6 g of Mg from MgCl₂?

Derive van’t Hoff general solution equation.

Write the conditions for maximum work done by the system.

What is effective atomic number? Calculate effective atomic number of copper  ( Z = 29 ) in (Cu ( NH₃)₄)²⁺

Explain the position of actinoids in the periodic table.
What is the action of sulphur on lanthanoids? Calculate the magnetic moment of divalent ion in aqueous solution it its atomic number is 24.

Explain the following properties of group 16 elements :
1) Electro negativity
2) Melting and boiling points
3) Metallic character
4) Allotropy

What is the role of the following compound -
CaF₂ in metallurgy of aluminum?

How are ethers classified?

Write features of a reversible process.

The process of extracting a soluble material from an insoluble solid by dissolving out in a suitable solvent is known as _________. 

What are 'd' and 'f' block elements?

What is the action of the following on isopropyl methyl ether? 
a. Cold HI
b. Hot HI