The solubility of a gas in a liquid

Helium and element ' \(X\) ' have outer electron configuration of ns2. Identify the element ' \(X\) '.

The molecule having largest \(C - X\) bond length is

Activation energy (\(E_a\)) and rate constants (\(K_1\) and \(K_2\)) at two different temperature \(T_1\) and \(T_2\) respectively for a chemical reaction are related as :

Answer the question on the basis of passage given below:
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.
Among the elements mentioned below, some are not stable in their +3 oxidation state and undergoes disproportionation reactions easily:
A. N
B. \(P\)
C. As
D. Sb
E. Bi
Choose the correct answer from the options given below:

According to the collision theory which one of the following statements is correct?

Allyl chloride on dehydrochlorination gives:

The RNA polymerase I in the nucleus transcribes :

Identify the correct statements:
(A) A magnetic field exerts force on a moving charge and not on a stationary charge.
(B) A moving charge produces a magnetic field.
(C) The magnetic field at a point on the axis of a current element is zero.
(D) Magnetic field \( \vec{B} \) is tangential to a magnetic field line.
Choose the correct answer from the options given below:

If the matrix \(\left[\begin{array}{ccc}-1 & x-y & 4 \\ 2 & 0 & 5 \\ x+y & z & 6\end{array}\right]\) is symmetric, then \(x+3 y+2 z\) is equal to

If the function \(f(x)=2 x^3+9 x^2+12 x-1\) is given, then \(f(x)\) has

UAA is recognised as

Increasing order of oxidation states of transition metal oxides will be :
(A) \(\text{TiO}_2\)
(B) \(\text{MnO}_4^-\)
(C) \(\text{VO}_2^+\)
(D) \(\text{CrO}_4^{2-}\)
(E) \(\text{Ni(CO)}_4\)
Choose the \textbf{correct} answer from the options given below :