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

Write the reactions for the preparation of carbolic acid from aniline.

What is the action of conc. H₂SO₄ on carbolic acid at 373 K.

Write chemical reactions to convert phenol into salicyaldehyde. Write the name of the reaction. What happens when if CCl₄ is used instead of CHCl₃ in the above reaction.

An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C₂H₄O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.

The value of 1dm³ bar is ______.

The work done in the dm3 bar when 200 mL of ethylene gas and 150 mL of HCl gas were allowed to react at 1 bar pressure is ______.

How many moles of electrons are required for reduction of 2 moles of Zn²⁺ to Zn?

What is the action of following reagents on ethanoic acid?

SOCl₂/heat

What is the action of following reagents on ethanoic acid?

SOCl₂/heat

What is the action of following reagents on ethanoic acid?

sodalime/heat

What is the action of following reagents on ethanoic acid?

sodalime/heat

What is the action of following reagents on ethanoic acid?

P₂O₅/heat

What is the action of following reagents on ethanoic acid?

P₂O₅/heat

Write reactions for the following conversions.

Benzene to Benzaldehyde

Write reactions for the following conversions.

Benzene to Benzaldehyde

Time required for 100% completion of a zero order reaction is _______.

Rate constant of a reaction is 3.6 × 10^–3 s^–1. The order of reaction is ______.

For first order reaction, the rate constant for the decomposition of N₂O₅ is 6 × 10^–4 s ^–1. The half-life period for decomposition in seconds is ______.

The rate of catalysed reaction is large than the uncatalysed reaction as _______.

Draw structure of salicylaldehyde.