Given below are two statements : Statement I : Hyperconjugation is a permanent effect. Statement II : Hyperconjugation in ethyl cation $$\left(C{H}_3-\stackrel{+}{C}{H}_2\right)$$ involves the overlapping of $$C_{s{p}^2}-H_{1s}$$ bond with empty 2p orbital of other carbon. Choose the correct option :

Which one of the following compounds is not aromatic?

The number of stereoisomers possible for 1, 2-dimethyl cyclopropane is :

The compound/s which will show significant intermolecular H-bonding is/are :

Choose the correct name for compound given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) : Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone. Reason (R) : Two liquids with a difference of more than 20$${}^{\circ }$$ in their boiling points can be separated by simple distillations. In the light of the above statements, choose the most appropriate answer from the options given below :

Arrange the following conformational isomers of n-butane in order of their increasing potential energy :

Which one of the following compounds is aromatic in nature?

During which of the following processes, does entropy decrease? (A) Freezing of water to ice at 0$${}^{\circ }$$C (B) Freezing of water to ice at $$-$$10$${}^{\circ }$$C (C) N2(g) + 3H2(g) $$\to$$ 2NH3(g) (D) Adsorption of CO(g) on lead surface. (E) Dissolution of NaCl in water Choose the correct answer from the options given below :

The incorrect expression among the following is :

Given below are two statements : Statement I : The identification of Ni2+ is carried out by dimethyl glyoxime in the presence of NH4OH. Statement II : The dimethyl glyoxime is a bidentate neutral ligand. In the light of the above statements, choose the correct answer from the options given below :

Cu2+ salt reacts with potassium iodide to give

To an aqueous solution containing ions such as Al3+, Zn2+, Ca2+, Fe3+, Ni2+, Ba2+ and Cu2+ was added conc. HCl, followed by H2S. The total number of cations precipitated during this reaction is/are :

Which of the following reagent is used for the following reaction ? $${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3\stackrel{?}{⟶}{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$$

Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO4 and H2SO4?

Which of the following reagent is suitable for the preparation of the product in the above reaction?

Match List - I and List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-amwm{font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} List-I List-II (a) (i) $${\mathrm{Br}}_2/\mathrm{NaOH}$$ (b) (ii) $${\mathrm{H}}_2/\mathrm{Pd}-{\mathrm{BaSO}}_4$$ (c) (iii) $$\mathrm{Zn}(\mathrm{Hg})/\mathrm{H}$$ Conc. $$\mathrm{HCl}$$ (d) (iv) $${\mathrm{Cl}}_2$$ Red $$\mathrm{P},{\mathrm{H}}_2\mathrm{O}$$ Choose the correct answer from the options given below :

Which one of the following reactions will not form acetaldehyde?

Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are :

The major product of the following chemical reaction is :