Organic Chemistry PYQ — Page 12

In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide $(\mathrm{AgBr})$. The percentage of Bromine in the organic compound is $\ldots\ldots$ $\times 10^{-1 \%}$ (Nearest integer). (Given : Molar mass of Ag is 108 and Br is $80 \mathrm{~g} \mathrm{~mol}^{-1}$ )

Given below are two statements : Statement (I) : Nitrogen, sulphur, halogen and phosphorus present in an organic compound are detected by Lassaigne's Test. Statement (II) : The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test. In the light of the above statements, choose the correct anower from the options given below :

The correct order of basicity for the following molecules is: 

Given below are two statements : Statement (I) : The boiling points of alcohols and phenols increase with increase in the number of C-atoms. Statement (II) : The boiling points of alcohols and phenols are higher in comparison to other class of compounds such as ethers, haloalkanes. In the light of the above statements, choose the correct answer from the options given below :

Fat soluble vitamins are : A. Vitamin $B_1$ B. Vitamin C C. Vitamin E D. Vitamin $\mathrm{B}_{12}$ E. Vitamin K Choose the correct answer from the options given below :

In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was ______ %.

The compounds which give positive Fehling's test are : (A) (B) (C)$\mathrm{HOCH}_2-\mathrm{CO}-(\mathrm{CHOH})_3-\mathrm{CH}_2-\mathrm{OH}$ (D) (E) Choose the correct answer from the options given below :

Identify the structure of the final product (D) in the following sequence of the reactions :  Total number of $\mathrm{sp}^2$ hybridised carbon atoms in product D is.

 Choose the correct answer from the options given below :

The major product $(\mathrm{P})$ in the following reaction is : 

The product $B$ formed in the following reaction sequence is : 

In the following reactions, which one is NOT correct?

Match List-I with List-II  Choose the correct answer from the options given below :

Propane molecule on chlorination under photochemical condition gives two di-chloro products, " x " and " y ". Amongst " x " and " y ", " x " is an optically active molecule. How many tri-chloro products (consider only structural isomers) will be obtained from " x " when it is further treated with chlorine under the photochemical condition?

 Choose the correct answer from the options given below :

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

Given below are two statements : Statement (I) : are isomeric compounds.Statement (II) : are functional group isomers.

Consider the following sequence of reactions:  11.25 mg of chlorobenzene will produce __________ $\times 10^{-1} \mathrm{mg}$ of product B . (Consider the reactions result in complete conversion.) [Given molar mass of $\mathrm{C}, \mathrm{H}, \mathrm{O}, \mathrm{N}$ and Cl as $12,1,16,14$ and $35.5 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively]

The correct order of basic nature on aqueous solution for the bases \(\mathrm{NH}_3, \mathrm{H}_2 \mathrm{~N}-\mathrm{NH}_2, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{NH}_2\), \(\left(\mathrm{CH}_3 \mathrm{CH}_2\right)_2 \mathrm{NH}\) and \(\left(\mathrm{CH}_3 \mathrm{CH}_2\right)_3 \mathrm{~N}\) is :

In the following series of reactions identify the major products A \& B respectively. 

Match List-I with List-II  Choose the correct answer from the options given below :

Identify correct statements : (A) Primary amines do not give diazonium salts when treated with $\mathrm{NaNO}_2$ in acidic condition. (B) Aliphatic and aromatic primary amines on heating with $\mathrm{CHCl}_3$ and ethanolic KOH form carbylamines. (C) Secondary and tertiary amines also give carbylamine test. (D) Benzenesulfonyl chloride is known as Hinsberg's reagent. (E) Tertiary amines reacts with benzenesulfonyl chloride very easily. Choose the correct answer from the options given below :

An optically active alkyl halide \(\mathrm{C}_4 \mathrm{H}_9 \mathrm{Br}\) [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 \([\mathrm{E}]\) is :

Which of the following compounds is least likely to give effervescence of $\mathrm{CO}_2$ in presence of aq. $\mathrm{NaHCO}_3$ ?