Question Bank Directory

When m-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are):

In a set of the given reactions, acetic acid yielded a product C: $$CH_3COOH + PCl_5 \rightarrow A \xrightarrow[Anh. AlCl_3]{C_6H_6} B \xrightarrow[ether]{C_2H_5MgBr} C$$ Product C would be:

Half-life of a radioactive sample is 4 days. After 16 days what quantity of matter remains undecayed?

Which of the following compounds has a higher basic character than aniline?

Given below are two statements: **Statement I:** Aldehydes and ketones having at least one $\alpha$-hydrogen undergo aldol condensation in the presence of dilute alkali as catalyst. **Statement II:** When aldol condensation is carried out between two different aldehydes, it is called cross aldol condensation. Ketones do not give this reaction. In light of the above statements, choose the most appropriate answer from the options given below:

Which structure(s) of proteins remains(s) intact during denaturation process?

At a point A on the earth's surface the angle of dip, $\delta = +25^{\circ}$. At a point B on the earth's surface the angle of dip, $\delta = -25^{\circ}$. We can interpret that:

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

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

The correct statement regarding the basicity of arylamines is:

Match List-I with List-II. | List-I (Products formed) | List-II (Reaction of carbonyl compound with) | | :--- | :--- | | (a) Cyanohydrin | (I) $NH_2OH$ | | (b) Acetal | (II) $RNH_2$ | | (c) Schiff's base | (III) Alcohol | | (d) Oxime | (IV) $HCN$ |

Nitrobenzene on reaction with conc. $HNO_3 / H_2SO_4$ at $80 - 100^\circ\text{C}$ forms:

Given below are two statements: **Statement I:** The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole-dipole interactions. **Statement II:** The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding. In the light of the above statements, choose the most appropriate answer from the options given below:

Mark the reaction that does not yield aniline from the given options:

Which of the following is not a correct statement?

Given below are two statements: Statement I: Benzoic acid produces effervescence on treatment with aq. $NaHCO_3$. Statement II: The effervescence is due to the release of hydrogen gas. In the light of the above statements, choose the most appropriate answer from the options give below:

The product formed from the following reaction sequence is [Reaction Sequence Missing]

Which of the following statement is not true about glucose?

Which is the correct statement among the following?

Which of the following reactions is not an example of nucleophilic addition–elimination reaction?