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

Explain briefly the time independent Schrodinger wave equation?

What would be the IUPAC name for an element with the atomic number 222?

The correct order of electron gain enthalpy with negative sign of F, Cl, Br and I having atomic number 9, 17, 35 and 53 respectively is

Find the wrong statement.

Give the systematic name for the following.

Caustic potash

Rate of diffusion of a gas is

In a closed room of 1000 m³ a perfume bottle is opened up. The room develops a smell. This is due to which property of gases?

Give a suitable explanation for the following facts about gases.

Gases diffuse through all the space available to them

Distinguish between diffusion and effusion.

When ammonia combines with HCl, NH₄Cl is formed as white dense fumes. Why do more fumes appear near HCl?

It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N₂ gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas?

Normality of 1.25M sulphuric acid is ______.

Which is the molality of a 10% w/w aqueous sodium hydroxide solution?

The correct equation for the degree of an associating solute, ‘n’ molecules of which undergoes association in solution, is

Equimolal aqueous solutions of NaCl and KCl are prepared, If the freezing point of NaCl is -2°C, the freezing point of KCl solution is expected to be ______.

Explain the effect of pressure on solubility.

How many moles of solute particles are present in one liter of 10^-4 M potassium sulphate?

An alkyl bromide (A) reacts with sodium in ether to form 4, 5 – diethyloctane, the compound (A) is

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