Identify the most volatile compound

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Second period elements of p-Block differs from the rest of their group members due to their small atomic size, high electronegativity, high ionization enthalpy and absence of d-orbitals. The elements from the second period like C, N, O have unique property of forming \(p \pi-p \pi\) multiple bonds whereas other heavier elements of p-block form \(d \pi-p \pi\) multiple bonds. This changes the properties of second period elements to great extent. Also the single bond strength of the p-block elements with their own atoms gets affected by their atomic size and presence of lone pairs.
Inert pair effect also affects the properties of the p-Block elements especially for those elements which are present from 4th period onward and this happens due to poor screening effect of inner (n-1)d subshell electrons.
Catenation tendency of Nitrogen is weaker than Phosphorus, because

Match the biological entity given in List-I with the metal involved in it given in List-II

List-I (Biological entity)	List-II (Metal involved)
(A) Chlorophyll	(I) Iron
(B) Haemoglobin	(II) Magnesium
(C) Vitamin B12	(III) Nickel
(D) Urease	(IV) Cobalt

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Arrange the following compounds in increasing order towards Nucleophilic addition reactions:
(A) Propanal
(B) Benzaldehyde
(C) Acetone
(D) Di-tert-butyl ketone
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Which reagent will distinguish Benzophenone from acetone ?

Calculate the molality of KI if the density of 20% (mass/mass) aqueous solution of KI is 1.202 g mL^-1.
(Molar mass of KI is 166 g mol^-1)

Choose the correct order of increasing acidic strength of following compounds:
(A) 3-Nitrophenol
(B) Phenol
(C) Propan-1-ol
(D) 3,5-Dinitrophenol
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Mucosa-associated lymphoid tissue (MALT) is located within the lining of -

The derivative of \(\frac{\tan ^{-1} x}{1+\tan ^{-1} x}\) with respect to \(\tan ^{-1}\) is :

A 10 cm long air-core solenoid of cross-sectional area \( 1.0 \, \text{cm}^2 \) contains 300 turns. Its inductance is:

If the order of matrix \(A\) is \(4 \times 3\), order of matrix \(B\) is \(4 \times 5\) and order of matrix \(C\) is \(5 \times 3\), then the order of matrix \((B \cdot C) A^{\prime}\) is :

The solution of the differential equation \(\frac{d y}{d x}=\frac{6}{x^2} ; y(1)=3\) is :

Select the brain capacity of Homo erectus from the following: