Question

chemistry imp question for 12 maharashtra board

Answer 1

Chemistry Important Question Bank 2017

Q1 Write the structural formula and IUPAC names of all possible isomers of the compounds with molecular formula C3 H8 O.

Write ‘two’ uses of phenol.

What happens when glucose is treated with –

(a) Bromine water

(b) Dilute nitric acid

(c) Hydrogen cyanide (HCN)

Q2 What is the action of the following reagents on aniline?

(a) Bromine water

(b) Acetic anhydride

( C ) Hot and conc. Sulphuric acid

Q3. What is ‘boiling Point’?

Derive a relation between ΔH and ΔU for a chemical reaction. Draw neat labeled diagram of calomel electrode. Resistance and conductivity of a cell containing 0.001 M KCL solution at 298K are 1500Ω and 1.46 x 10 -4S.cm -1 respectively. What is the cell constant?

Q 4. Distinguish between crystalline solid and amorphous solid.

Q5. (a) Explain with reason sign conventions of ΔS in the following reactions:

Answer 2

I would say you should focus on organic chemistry and chemical bonding.  Most mistakes are done in these regions . The acid base and salt chapter is a tricky one . It also requires proper attention.  Rest are easy except mettalurgy.......