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

Draw intramolecular hydrogen bonding structure in o-nitrophenol.

What is the action of following reagents on pent-3-enal?

1. H₂/Ni
2. LiAlH₄/H₃O⁺

Write the reaction involved in the preparation of phenol from benzene sulphonic acid.

Write Kolbe’s reaction.

Name the reagents used to convert phenol into

1. picric acid
2. p-benzoquinone

Write chemical equation of acetyl chloride with phenol

What is the action of following on phenol at low temperature?

1. dil. HNO₃
2. conc. H₂SO₄
3. Br₂/CS₂

An unknown alcohol is treated with Lucas reagent. Explain how you will determine whether the alcohol is primary, secondary or tertiary. Indicate by chemical equation the reaction between isopropyl alcohol and Lucas reagent.

How will you bring about the following conversions?

isopropyl alcohol to acetone

How will you bring about the following conversions?

2-methyl propan-2-ol to 2-methylpropene

How will you bring about the following conversions?

acetone to 2-methylpropan-2-ol

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