The number of sigma ($\sigma$) and pi ($\pi$) bonds in pent-2-en-4-yne is:

The structure of intermediate A in the following reaction is:

The correct structure of tribromooctaoxide is:

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:

Which of the following reactions are disproportionation reactions?

Under isothermal condition, a gas at $300$ K expands from $0.1$ L to $0.25$ L against a constant external pressure of $2$ bar. The work done by the gas is$\\$(Given that $1$

Among the following, the one that is not a greenhouse gas is:

For the cell reaction$\\ {2Fe}^{3+} (aq) + 2I^{-} (aq) \rightarrow 2Fe^{2+} (aq) + I_2 (s) \\$

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:

The most suitable reagent for the following conversion is:$$

Which is the correct thermal stability order for $H_2E$ (E = O, S, Se, Te and Po)?

Which of the following statements is incorrect?

Match the following:

Which of the following diatomic molecular species has only $\pi$ bonds according to Molecular Orbital Theory?

For the second period elements, the correct increasing order of first ionization enthalpy is:

The biodegradable polymer is:

The pH of a saturated solution of $Ca(OH)_2$ is $9.$ The solubility product $(K_{sp})$

If the rate constant for a first order reaction is $k,$ the time $(t)$ required for the completion of $99\%$ of the reaction is given by:

The non-essential amino acid among the following is:

Among the following, the reaction that proceeds through an electrophilic substitution is:

The mixture that forms a maximum boiling azeotrope is:

For the chemical reaction$\\ N_2 (g) + 3H_2 (g) \rightleftharpoons 2NH_3 (g), \\$

The number of moles of hydrogen molecules required to produce $20$ moles of ammonia through Haber’s process is:

The compound that is most difficult to protonate is:

For an ideal solution, the correct option is:

Conjugate base for Bronsted acids $H_2O$ and $HF$ are:

Which mixture of the solutions will lead to the formation of negatively charged colloidal $[AgI] I^-$ sol.?

Among the following, the narrow spectrum antibiotic is:

An alkene $A$ on reaction with $O_3$ and Zn–H$_2O$ gives propanone and ethanal in equimolar ratio. Addition of $HCl$

What is the correct electronic configuration of the central atom in $K_4[Fe(CN)_6]$ based on crystal field theory?

Identify the incorrect statement related to $PCl_5$ from the following:

Which will make a basic buffer?

The major product of the following reaction is:?

Match the Xenon compounds in Column-I with its structure in Column-II and assign the correct code:

The manganate and permanganate ions are tetrahedral, due to:

Which of the following species is not stable?

For a cell involving one electron $E^\circ_{cell} = 0.59$ V at $298$ K, the equilibrium constant for the cell reaction is:

Which of the following is an amphoteric hydroxide?

A gas at $350 K$ and $15$ bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor $(Z)$ is:

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is:

In which case change in entropy is negative?

Which of the following series of transitions in the spectrum of hydrogen atom falls in the visible region?

The method used to remove temporary hardness of water is:

Which one is malachite from the following?

The correct order of the basic strength of methyl substituted amines in aqueous solution is: