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

How is nitroethane converted into acetic acid

How is carbolic acid prepared from the given compounds :

Chlorobenzene and steam at 698K?

What is the action of dioxygen on Iron

What is the action of dioxygen on Carbon disulfide

The process in which the value of ΔU = 0 is __

The half-life period of zero order reaction A → product is given by

(a) `([A]_0)/k`

(b) `0.693/k`

(c) `[A]_0/(2k)`

(d) `(2[A]_0)/k`

Write the chemical equations involved in van Arkel method for refining zirconium metal.

Propene on oxidation with diborane in presence of alkaline hydrogen peroxide gives

(a) propane-1- ol

(b) propane-2-ol

(c) allyl alcohol

(d) propane-1, 2-diol

Identify 'A' and 'B' in the following reaction and rewrite the complete reaction :

What is Nessler’s reagent?

Write chemical reaction to prepare the Dextron polymer:
Dextron

Distinguish between crystalline solids and amorsphous solids.

What is Grignard reagent?

The half life period of a first order reaction is 6. 0 h . Calculate the rate constant

Classify the following molecular solids into different types: 

1. HCl
2. CO₂
3. Solid ice
4. SO₂

The molar conductivity of 0.05 M BaCl₂ solution at 25° C is 223Ω^-1 cm² mol^-1. What is its conductivity?

Define Anisotropy.

In a first-order reaction A → product, 80% of the given sample of compound decomposes in 40 min. What is the half-life period of the reaction? 

The S.I. unit of cell constant for conductivity cell is __________.

Write a preparation of phenol from cumene? What happens when phenol is heated with zinc dust?