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

Write chemical reaction for preparation of the following.

Buna-S

Write chemical reaction for preparation of the following.

Neoprene

Write the name of one example of each polymer in which following repeating units.

\[\begin{array}{cc}
\ce{(-CF2-CF2-), -[NH-(CH2)5-CO] -, -(CH2-CH-), (-CH2-CH2-)}\\
\phantom{............................}|\\
\phantom{..............................}\ce{CN}
\end{array}\]

Write the name and formulae of the monomers used for the preparation of dacron.

Write chemical reactions for the preparation of high-density polythene.

Write two uses and two properties of polythene.

Explain vulcanization of rubber.

Define rubber.

Explain the reactions involved in the preparation of viscose rayon.

The coordination number of atoms in body-centred cubic structure (bcc) is ______.

The correct formula for the complex compound, sodium hexacyanoferrate (III) is ______.

Write the name of biodegradable polyamide copolymer.

One mole of an ideal gas is expanded isothermally and reversibly from 10 L to 15 L at 300 K. Calculate the work done in the process.

How many moles of electrons are required for reduction of 2 moles of Zn²⁺ to Zn? How many Faradays of electricity will be required?

Write preparation of acetic acid from:

acetyl chloride

Gold crystallises into face-centred cubic cells. The edge length of a unit cell is 4.08 × 10^–8 cm. Calculate the density of gold. [Molar mass of gold = 197 g mol^–1]

Write preparation of acetic acid from:

dry ice

The boiling point of HCl is ______.

An element has a bee structure with unit cell edge length of 288 pm. How many unit cells and number of atoms are present in 200 g of the element?

The correct formula of a complex having IUPAC name Tetraamminedibromoplatinum (IV) bromide is ______.