HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

Explain the trends in the following atomic properties of group 16 elements:

Atomic radii

Explain the trends in the following atomic properties of group 16 elements:

Ionisation enthalpy

Explain the trends in the following atomic properties of group 16 elements:

Electronegativity

Explain the trends in the following atomic properties of group 16 elements:

Electron gain enthalpy

Write preparation of phenol from aniline.

Write chemical reactions to prepare ethanamine from:

Acetonitrile

Write chemical reactions to prepare ethanamine from:

Nitroethane

Write chemical reactions of following reagents on methoxyethane:

PCl₅

Polonium has the half-Life of ______.

Name one amphoteric solvent.

The monomer of natural rubber is ______.

Write the name of the product formed by the action of LiAlH₄/ether on acetamide.

Calculate molar conductivity for 0.5 M BaCl₂ if its conductivity at 298K is 0.01 Ω^–1 cm^–1.

Convert the following:

Ethyl alcohol into ethyl acetate.

How will you obtain the following? (Give balanced equation.)

Ethyl chloride from diethyl ether.

Write a chemical reaction for the following conversion:

Acetic acid into ethyl alcohol.

Write Dow process for the preparation of Phenol.

Write two uses of dioxygen.

Answer the following.

Name and draw structure of the repeating unit in natural rubber.

Answer the following.

Write the structure of isoprene and the polymer obtained from it.