Which of the following equations does NOT represent Charles's law for a given mass of gas at
constant pressure?

Impossible orbital among the following is

IUPAC name of



is

Reactions in Zeolite catalyst depend on,

The Vant Hoffs factor 'i' accounts for

The correct decreasing order of boiling point of hydrogen halides is

Match List-I with List-II
\begin{array}{|l|l|l|l|}\hline & \text{List-I (Types of redox reactions)} & & \text{List-II (Examples)} \\\hline \text{a}. & \text{Combination reaction} & \text{(i)} & \mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{Br}_{(\mathrm{aq})}^{-} \rightarrow 2 \mathrm{Cl}_{(\mathrm{aq})}^{-}+\mathrm{Br}_{2(\mathrm{l})} \\\hline \text{b.} & \text{Decomposition reaction} & \text{(ii)} & 2 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{aq})} \rightarrow 2 \mathrm{H}_2 \mathrm{O}_{(1)}+\mathrm{O}_{2(\mathrm{~g})} \\\hline \text{c.} & \text{Displacement reaction} & \text{(iii)} & \mathrm{CH}_{4(\mathrm{~g})}+2 \mathrm{O}_{2(\mathrm{~g})} \xrightarrow{\Delta} \mathrm{CO}_{2(\mathrm{~g})}+2 \mathrm{H}_2 \mathrm{O}_{(1)} \\\hline \text{d.} & \text{Disproportionation reaction} & \text{(iv)} & \mathrm{H}_2 \mathrm{O}_{(1)} \xrightarrow{\Delta} 2 \mathrm{H}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \\\hline\end{array}

Choose the correct answer from the options given below.

If \(a_1, a_2 ; a_3, \ldots, a_{10}\) is a geometric progression and \(\frac{a_3}{a_1}=25\), then \(\frac{a_9}{a_5}\) equals

The shape of \( X e F_{6} \) is,

The radius of hydrogen atom in the ground state is \(0.53 Å\). After collision with an electron, it is found to have a radius of \(2.12 Å\), the principal quantum number \(n\) of the final state of the atom is

In Kolbe's reaction the reacting substances are

The function of potassium ethyl xanthate in froth floatation process is to make the ore

In a potentiometer experiment of a cell of emf \( 1.25 \mathrm{~V} \) gives balancing length of \( 30 \mathrm{~cm} \). If the
cell is replaced by another cell, balancing length is found to be \( 40 \mathrm{~cm} \). What is the emf of
second cell ?