A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline condition gives (" $R$ "). The structure of (" $R$ ") is given below. The structure of ("P") is

Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizaro Reaction C. Aldol Condensation D. Tollen's Test E. Clemmensen Reduction Choose the correct answer from the options given below:

The compounds that produce ${\mathrm{CO}}_2$ with aqueous ${\mathrm{NaHCO}}_3$ solution are: Choose the correct answer from the options given below:

Given below are two statements: Statement I : Vanilin will react with NaOH and also with Tollen's reagent. Statement II : Vanilin will undergo self aldol condensation very easily. In the light of the above statements, choose the most appropriate answer from the options given below :

An optically active alkyl halide ${\mathrm{C}}_4{\mathrm{H}}_9\mathrm{Br}[\mathrm{A}]$ reacts with hot KOH dissolved in ethanol and forms alkene $[B]$ as major product which reacts with bromine to give dibromide $[C]$. The compound [C] is converted into a gas [D] upon reacting with alcoholic ${\mathrm{NaNH}}_2$. During hydration 18 gram of water is added to 1 mole of gas [D] on warming with mercuric sulphate and dilute acid at 333 K to form compound [E]. The IUPAC name of compound [ E ] is :

When undergoes intramolecular aldol condensation, the major product formed is :

Choose the correct option for structures of $A$ and $B$, respectively

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ? (A) $\mathrm{R}-\mathrm{C}\equiv \mathrm{N}\underset{\text{ mild condition }}{\overset{\text{ (i) }\stackrel{+}{\mathrm{H}}/{\mathrm{H}}_2\mathrm{O}}{\to }}$ (B) $\mathrm{R}-\mathrm{MgX}\underset{\text{ (ii) }{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\text{(i) }{\mathrm{CO}}_2}{\to }}$ (C) $\mathrm{R}-\mathrm{C}\equiv \mathrm{N}\underset{\text{ (ii) }{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\text{(i) }{\mathrm{SnCl}}_2/\mathrm{HCl}}{\to }}$ (D) $\mathrm{R}\cdot {\mathrm{CH}}_2\cdot \mathrm{OH}\stackrel{\mathrm{PCC}}{\to }$ (E) Choose the correct answer from the options given below :

Number of molecules from below which cannot give iodoform reaction is : Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol.

" P " is an optically active compound with molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{12}\mathrm{O}$. When ' P ' is treated with 2, 4-dinitrophenylhydrazine, it gives a positive test. However, in presence of Tollens reagent, " P " gives a negative test. Predict the structure of " P ".

Which among the following compounds give yellow solid when reacted with $\mathrm{NaOI}/\mathrm{NaOH}$ ? Choose the correct answer from the options given below :

Aldol condensation is a popular and classical method to prepare $\alpha ,\beta$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?

An organic compound $(\mathrm{X})$ with molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ is not readily oxidised. On reduction it gives ${\mathrm{C}}_3{\mathrm{H}}_8\mathrm{O}(\mathrm{Y})$ which reacts with HBr to give a bromide $(\mathrm{Z})$ which is converted to Grignard reagent. This Grignard reagent on reaction with $(\mathrm{X})$ followed by hydrolysis give 2,3-dimethylbutan-2-ol. Compounds $(\mathrm{X}),(\mathrm{Y})$ and $(\mathrm{Z})$ respectively are:

Choose the correct statements.(A) Weight of a substance is the amount of matter present in it.(B) Mass is the force exerted by gravity on an object.(C) Volume is the amount of space occupied by a substance.(D) Temperatures below 0°C are possible in Celsius scale, but in Kelvin scale negative temperature is not possible.(E) Precision refers to the closeness of various measurements for the same quantity.Choose the correct answer from the options given below :

Density of 3 M NaCl solution is $1.25\mathrm{g}/\mathrm{mL}$. The molality of the solution is :

Concentrated nitric acid is labelled as $75 \%$ by mass. The volume in mL of the solution which contains 30 g of nitric acid is ______________. Given : Density of nitric acid solution is $1.25\mathrm{g}/\mathrm{mL}$.

$2.8\times 10^{-3}\mathrm{mol}$ of ${\mathrm{CO}}_2$ is left after removing $10^{21}$ molecules from its ' $x$ ' mg sample. The mass of ${\mathrm{CO}}_2$ taken initially is Given: ${\mathrm{N}}_{\mathrm{A}}=6.02\times 10^{23}{\mathrm{mol}}^{-1}$

The elemental composition of a compound is $54.2\%\mathrm{C},9.2\%\mathrm{H}$ and $36.6\%\mathrm{O}$. If the molar mass of the compound is $132\mathrm{g}{\mathrm{mol}}^{-1}$, the molecular formula of the compound is : [Given : The relative atomic mass of $\mathrm{C}:\mathrm{H}:\mathrm{O}=12:1:16$ ]

On combustion 0.210 g of an organic compound containing C, H and O gave 0.127 g H2O and 0.307 g CO2. The percentages of hydrogen and oxygen in the given organic compound respectively are: