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

Explain any two chemical methods of food preservation.

In Van Arkel method of refining metal, impure zirconium is converted to unstable volatile
compound by heating it with _______.

(A) oxygen

(B) chlorine

(C) bromine

(D) iodine

Define isotonic solutions.

Write electronic configuration and two uses of neon. (Z = 10)

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

Why ethanol has the higher boiling point than ethane?

Write a chemical equation for the action of neutral ferric chloride on phenol.

Draw the structures of adenine.

What are isotonic solutions? Explain with one example.

A compound used as pistachio flavour in ice cream is ___________

A compound used as pistachio flavour in ice cream is ___________

Oxidation states of scandium are ___________.

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

Write the molecular formula of noverstrol.

Write the number of hydroxyl groups present in α - D (+) -Glucopyranose (trans.)

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.