HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

How is ethanol prepared from methanal by using Grignard reagent?

Write the chemical reaction to prepare novolac polymer.

Explain the following term: Homopolymers

Write a short note on Hoffmann bromamide degradation.

What is the action of the following reagents on ammonia : 
Nessler's reagent

Explain, why do aquatic animals prefer to stay at lower level of water during summer?

Write the molecular formula and structural formula of BHA and BHT.

Identify the compounds 'A' and 'B' in the following equation:

How is Methoxyethane prepared from : Methyl iodide

IUPAC name of K₄[Fe(CN)₆] is

Carbon atom in methyl carbocation contains how many pairs of electrons?

(a) 8

(b) 4

(c) 3

(d) 5

Bakelite is the polymer of:

(a) Benzaldchyde and phenol

(b) Acetaldehyde and phenol

(c) Formaldehyde and phenol

(d) Formaldehyde and benzyl alcohol

Write the IUPAC name of the given compound:

Give an example each of a molecular solid and an ionic solid.

Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction

Gas (A) is more soluble in water than Gas (B) at the same temperature. Which one of the two gases will have the higher value of KH (Henry’s constant) and why

When a coordination compound CoCl₃.6NH₃ is mixed with AgNO₃, 3moles of AgCl are precipitated per mole of the compound. Write the IUPAC name of the coordination compound.

The conductivity of 0.001 mol L-1 solution of CH₃COOH is 3.905× 10-5 S cm-1. Calculate its molar conductivity and degree of dissociation (α) Given λ°(H⁺)= 349.6 S cm² mol-1 and λ°(CH₃COO)= 40.9S cm²mol^-1.

Write the IUPAC name of the given compound:

State Henry’s law.