HSC Science कक्षा ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

The IUPAC name of the following compound is

\[\begin{array}{cc}
\phantom{........}\ce{Cl}\phantom{......}\ce{CH2 - CH3}\\\backslash\phantom{......}/\\
\ce{C = C}\\/\phantom{......}\backslash\\
\ce{H3C}\phantom{......}\ce{I}
\end{array}\]

Propyne on passing through red hot iron tube gives

Complete the following:

\[\ce{CH2 = CH2 ->[I2]}\]

Why is it necessary to avoid even traces of moisture during the use of Grignard reagent?

What happens when acetyl chloride is treated with an excess of CH₃MgI?

Arrange the following alkyl halide in increasing order of bond enthalpy of RX.

CH₃Br, CH₃F, CH₃Cl, CH₃I

Starting from CH₃MgI, How will you prepare the following?

Acetic acid

Starting from CH₃MgI, How will you prepare the following?

Acetone

Starting from CH₃MgI, How will you prepare the following?

Methyl cyanide

Complete the following reaction.

\[\ce{CCl4 + H2O ->[\Delta]}\]

An organic compound (A) with molecular formula C₂H₅Cl reacts with KOH gives compounds (B) and with alcoholic KOH gives compound (C). Identify (A), (B), (C).

The gaseous envelope around the earth is known as atmosphere. The region lying between an altitudes of 11 – 50 km is _______.

Ozone depletion will cause ______.

Assertion (A): Oxygen plays a key role in the troposphere.

Reason (R): Troposphere is not responsible for all biological activities.

Which is considered to be the earth’s protective umbrella? Why?

On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?

Carbon forms two oxides, namely carbon monoxide and carbon dioxide. The equivalent mass of which element remains constant?

Hot concentrated sulphuric acid is a moderately strong oxidising agent. Which of the following reactions does not show oxidising behaviour?

The equivalent mass of potassium permanganate in alkaline medium is \[\ce{MnO^-_4 + 2H2O + 3e^- -> MnO2 + 4OH^-}\]

The equivalent mass of ferrous oxalate is