Match the following

List-I (Molecule)	\(\text{List-II (Dipole moment in D)}\)
A) \(\mathrm{HCl}\)	I) \(1.07\)
B) \(\mathrm{NH}_3\)	II) \(1.85\)
C) \(\mathrm{H}_2\mathrm{O}\)	III) \(0.23\)
D) \(\mathrm{NF}_3\)	IV) \(1.47\)

The correct answer is

The sum of oxygen atoms in the formulae of peroxysulphuric acid and pyrosulphuric acid is

Match the following
\(\begin{array}{ll}
\text{List - I} & \text{List - II} \\
\text{A) } \mathrm{Al}_2 \mathrm{O}_3+2 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \rightarrow 2 \mathrm{Na}\left[\mathrm{Al}(\mathrm{OH})_4\right] & \text{I) Roasting} \\
\text{B) } \mathrm{Ni}(\mathrm{CO})_4 \xrightarrow{230^{\circ} \mathrm{C}} \mathrm{Ni}+4 \mathrm{CO} & \text{II) Calcination} \\
\text{C) } \mathrm{Fe}_2 \mathrm{O}_3 \cdot 3 \mathrm{H}_2 \mathrm{O} \xrightarrow{\Delta} \mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{H}_2 \mathrm{O} & \text{II) Vapour phase refining} \\
\text{D) } 2 \mathrm{PbS}+3 \mathrm{O}_2 \rightarrow 2 \mathrm{PbO}+2 \mathrm{SO}_2 & \text{IV) Electrolysis} \\
& \text{V) Leaching}
\end{array}\)
The correct answer is

In which of the following sets allotropes of carbon are correctly matched with their uses?
i. graphite - crucibles
ii. activated charcoal - water filters
iii. carbon black - fuel
The correct answer is

The ions \(\mathrm{S}^{2-}, \mathrm{Cl}^{-}, \mathrm{K}^{+}, \mathrm{Ca}^{2+}\) are isoelectronic. Their ionic radii show

What is the molecular geometry of \(\mathrm{H}_3 \mathrm{O}^{+}\)?

At \(\mathrm{T}(\mathrm{K})\), the molar conductivity of \(0.04 \mathrm{M}\) acetic acid is \(7.8 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\). If the limiting molar conductivities of \(\mathrm{H}^{+}\)and \(\mathrm{CH}_3 \mathrm{COO}^{-}\)at \(\mathrm{T}(\mathrm{K})\) are 349 and \(41 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\) respectively, the dissociation constant of acetic acid is

The successive ionisation enthalpies of an element \(X\) in \(\left(\mathrm{kJ} \mathrm{mol}^{-1}\right)\) are 1012, 1907, \(2955,4955,6275\) and 21,260 respectively, the element \(X\) is

Which one of the following statement is not correct?

Curl the palm of your right hand around the circular wire with the fingers pointing in the direction of current and the thumb gives the direction of the magnetic field. In this case the upper side of the loop may be thought of as

The different types of bonds present in \(\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}\) are

If two identical bar magnets, each of length \(l\), pole strength \(m\) and magnetic moment \(M\) are placed perpendicular to each other with their unlike poles in contact, the magnetic moment of the combination is

In a \(\triangle \mathrm{ABC}\), if \(\mathrm{a}=13, \mathrm{~b}=14\) and \(\mathrm{c}=15\), then \(\sin\)