HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Define boiling point

Iodine exists as

• polar molecular solid
• ionic solid
• nonpolar molecular solid
• hydrogen bonded molecular solid

Illustrate with example, the difference between a double salt and a co-ordination compound

Define antioxidants?

Draw structure of BHT.

What are f-block elements? 

Define Broad-spectrum antibiotics with a suitable example?

What is salvarsan?

(A) An antiseptic

(B) An antibiotic

(C) An antifertility drug

(D) An analgesic

Explain Tranquilizers

What is Stephen reaction?

Explain Sidgwick’s electronic theory with suitable example

Which of the followings is a trihydric alcohol ?

(a) n-propyl alcohol

(b) Glycerol                         

(c)  Glycol                       

(d) Glycine

Explain the term Antiseptics

Write ‘four’ characteristics of co-ordinate complex ion.

Write ‘four’ physical methods of preserving food materials

Draw structure of Chlorine pentafluoride

a. Explain the trends in the following properties with reference to group 16:

1 Atomic radii and ionic radii

2 Density

3 ionisation enthalpy

4 Electronegativity

b. In the electolysis of AgNO₃ solution 0.7g of Ag is deposited after a certain period of time. Calulate the quantity of electricity required in coulomb. (Molar mass of Ag is 107.9g mol^-1)

Derive a relation between ΔH and ΔU for a chemical reaction. Draw neat labelled diagram of calomel electrode. Resistance and conductivity of a cell containing 0.001 M KCI solution at 298K are 1500Ω and 1.46x10^-4 S.cm^-1 respectively.

The rate of reaction for certain reaction is expressed as:

`1/3(d[A])/dt=-1/2(d[B])/dt=-(d[C])/dt`

 The reaction is ______.

What happens if external potential applied becomes greater than E°cell of electrochemical cell?