HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

How is phenol converted into the following?

picric acid

How is phenol converted into the following?

picric acid

How is nitromethane prepared from the following?

alkyl halide

How is nitromethane prepared from the following?

α-nitroalkene

How are polymers classified on the basis of polymerisation process?

Explain effects of lanthanoid contraction.

What are the consequences of lanthanoid contraction?

How does calcination differ from roasting?

Write resonating structures of ozone.

The decomposition of N₂O_5(g) at 320K according to the following equation follows first order reaction:

`N_2O_(5(g))->2NO_(2(g))+1/2O_(2(g))`

The initial concentration of N₂O_5(g) is 1.24 x 10^-2 mol. L-1 and after 60 minutes 0.20x10^-2 molL^-1. Calculate the rate constant of the reaction at 320K.

Write the fomulae of the following compounds :

Tetraaquodichlorochromium (III) chloride

Write the fomulae of the following compounds

Potassium tetracyanoaurate (III) ion

Explain the given terms : Elastomers

22.22 gram of urea was dissolved in 300 grams of water. Calculate the number of moles of urea and molality of the urea solution. (Given: a Molar mass of urea = 60 gram mol^-1)

What is the action of carbon on the following metal oxides:

Fe₂O₃ in the blast furnace

What is the action of carbon on the following metal oxides :

ZnO in the vertical retort furnace

The number of primary and secondary hydroxyl groups in ribose are -

(a) 1, 3

(b) 2, 3

(c) 3, 1

(d) 3, 2

What is the action of p-toluenesulphonychloride on ethylamine and diethylamine?

What are amino acids?

Write the correct reaction for formation of the peptide bond between amino acids