Answer the question on the basis of passage given below :
All transition elements display typical metallic properties like high melting point, boiling point, tensile strength, high malleability and ductility, luster, etc. Their metallic character increases down the group and elements of \(4 d\) and 5d series exhibit higher metallic characters. They show variable oxidation states and forms a number of coloured compounds due to the presence of unpaired electrons which shows d-d transitions and makes them paramagnetic.

The relation and units of cell constant are, Solutionrespectively,

"Answer the question on basis of passage given below :
Carboxylic acids are weaker than mineral acids, but they are stronger acids than alcohols and many simple phenols (\(\text{pKa}\) is ~ 16 for ethanol and 10 for phenol). The higher acidity of carboxylic acids as compared to phenols can be understood similarly. The conjugate base of carboxylic acid, a carboxylate ion, is stabilised by two equivalent resonance structures in which the negative charge is at the more electronegative oxygen atom. The conjugate base of phenol, a phenoxide ion, has non-equivalent resonance structures in which the negative charge is at the less electronegative carbon atom. Further, the negative charge is delocalised over two electronegative oxygen atoms in carboxylate ion whereas it is less effectively delocalised over one oxygen atom and less electronegative carbon atoms in phenoxide ion. Thus, the carboxylate ion is more estabilised than phenoxide ion, so carboxylic acids are more acidic than phenols.
Effect of substituents on the acidity of carboxylic acids: substituents may affect the stabliity of the conjugate base and thus, also affect the acidity of the carboxylic acids. Electron withdrawing group increase the acidity of carboxylic acids by stabilising the conjugate base through delocalisation of the negative charge by inductive and/or resonance effects. Conversely, electron donating groups decrease the acidity by destabilising the conjugate base.
The weakest among the following acid is :"

In the amalgam of mercury with sodium, the correct option for the physical states of solute and solvent is

What will be the product for the following reactions?
\(CH_3 - X \xrightarrow{KCN}\) A
\(CH_3 - X \xrightarrow{AgNO_2}\) B

In Kolbe's reaction, phenol undergoes :

Which of the following does not represent a correct application of the coordination compound?

An electron is moving at a velocity of 100 m/s along the X-axis in the presence of an electric field of 30 V/m directed along the Y-axis and a magnetic field of 300 G directed along the Z axis. The magnitude and direction of force acting on the electron is (Given: the charge on the electron is "e")

\(\left[ Cu ( en )_2\right]^{2+}\) is more stable than \(\left[ Cu \left( NH _3\right)_4\right]^{2+}\) because

The probability distribution of the random variable \(X\) is given by

X	0	1	2	3
P(X)	0.2	k	2k	2k

The variance of the random variable \(X\) is given by:

Androgens are synthesised and secreted by which of the following?

For the reaction \(x + y \rightarrow z\),
rate law expression is rate \(= k [x] [y]^3\).
1 If the volume of the vessel is reduced to of its original volume, then rate of reaction will 3:

Choose the incorrect statement from the following: