The spin only magnetic moment of \(\mathrm{Mn}^{4+}\) ion is nearly

Which of the following is not a colligative property?

Permanent hardness cannot be removed by

\[
\begin{array}{l}
M n O_{2}+H C l-\Delta \\
A_{(g)}+F_{2}(\text { excess })_{--}>->B_{(g)} \\
B_{(l)}+U_{(s)}-\cdots C_{(g)}+D_{(g)}
\end{array}
\]
The gases \( A, B, C \) and \( D \) are respectively

Which of the following is not a green house gas?

For the reaction, \(A(g)+B(g) \rightleftharpoons C(g)+D(g) ; \Delta H=Q \mathrm{~kJ}\)
The equilibrium constant cannot be disturbed by

Match List-I with List-II for the following reaction pattern
Glucose \(\xrightarrow{\text { Reagent }}\) Product \(\longrightarrow\) Structural prediction
\begin{array}{|l|l|l|l|}\hline & \text{List - I (Reagents)} & & \text{List-II (Structural prediction)} \\\hline \text{a}. & \text{Acetic anhydride} & \text{(i)} & \text{Glucose has an aldehyde group} \\\hline \text{b.} & \text{Bromine water} & \text{(ii)} & \text{Glucose has a straight chain of six carbon atoms} \\\hline \text{c.} & \text{Hydroiodic acid} & \text{(iii)} & \text{Glucose has five hydroxyl group} \\\hline \text{d.} & \text{Hydrogen cyanide} & \text{(iv)} & \text{Glucose has a carbonyl group} \\\hline\end{array}

Choose the correct answer from the options given below.

If \( \tan ^{-1} x+\tan ^{-1} y=\frac{4 \pi}{5} \), then \( \cot ^{-1} x+\cot ^{-1} y \) is equal to

In a transition series, with increase in atomic-number, the paramagnetism

The length of the chord joining the points \((4 \cos \theta, 4 \sin \theta)\) and \(\left(4 \cos \left(\theta+60^{\circ}\right)\right.\), \(\left.4 \sin \left(\theta+60^{\circ}\right)\right)\) of the circle \(x^{2}+y^{2}=16\) is

Carboxylic acids are more acidic than phenols because

A secondary cell is one

A parallel beam of light of wavelength \(6000 Å\) gets diffracted by a single slit of width \(0.3 \mathrm{~mm}\). The angular position of the first minima of diffracted light is