Organic Chemistry PYQ — Page 48

Reagent, $1-$naphthylamine and sulphanilic acid in acetic acid is used for the detection of

Given below are two statements: Statement-I: Retardation factor $({R}_{f})$ can be measured in meter/centimetre. Statement-II: ${R}_{f}$ value of a compound remains constant in all solvents. Choose the most appropriate answer from the options given below:

A non-reducing sugar $A$ hydrolyses to give two reducing mono saccharides. Sugar $A$ is

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?

In the given reaction $3-$Bromo$-2,2-$dimethyl butane $\overset{{C}_{2}{H}_{5}\mathrm{OH}}{\longrightarrow }\underset{\text{(Major Product)}}{'A'}$ Product $A$ is:

 Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

Match List - I with List - II.<table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List-I (Salt)</td><td colspan="2" rowspan="1">List-II (Flame colour wavelength)</td></tr><tr><td>(a)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_1__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__0217e565-ca29-4400-90db-6846af03ed46-image__778a74b7a7_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 1"></td><td>(i)</td><td>${\mathrm{Br}}_{2}/\mathrm{NaOH}$</td></tr><tr><td>(b)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_2__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__08d4de91-2a2f-4c10-8e2b-200519a02c8b-image__ec4150aca5_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 2"></td><td>(ii)</td><td>${H}_{2}/\mathrm{Pd}-{\mathrm{BaSO}}_{4}$</td></tr><tr><td>(c)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_3__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__10dcf030-7b0a-4369-bcd3-ee2434bc9ebb-image__01f6a5e148_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 3"></td><td>(iii)</td><td>$\mathrm{Zn}(\mathrm{Hg})/\mathrm{Conc}.\mathrm{HCl}$</td></tr><tr><td>(d)</td><td><img src="https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Amines/648b5a6a417cc3fb48d67218/question_4__q_648b5a6a417cc3fb48d67218__cdn-question-pool.getmarks.app__fa1d2e93-87f7-4d63-915a-fd4ebb2a7ff9-image__1a5db1416e_final_ppt_sync.png" alt="JEE Main 2021 Chemistry, Amines — question figure 4"></td><td>(iv)</td><td>${\mathrm{Cl}}_{2}/\mathrm{Red}P,{H}_{2}O$</td></tr></tbody></table>Choose the correct answer from the options given below:

 Maleic anhydride Maleic anhydride can be prepared by :

Identify $A$ and $B$ in the chemical reaction. 

What is the major product "P" of the following reaction ? 

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar. Reason (R): Sucrose involves glycosidic linkage between ${C}_{1}$ of $\beta$-glucose and ${C}_{2}$ of $\alpha$-fructose. Choose the most appropriate answer from the options given below :

An organic compound $A$ on treatment with benzene sulfonyl chloride gives compound $B$. $B$ is soluble in dil. $\mathrm{NaOH}$ solution. Compound $A$ is :

Seliwanoff test and Xanthoproteic test are used for the identification of _ and _ respectively.

 In the chemical reactions given above $A$ and $B$ respectively are :

 Among the given species the Resonance stabilised carbocations are:

 Considering the above reaction, the major product among the following is:

The major products $A$ and $B$ formed in the following reaction sequence are : 

Match List - I with List - II :<table class="pyq-table"><tbody><tr><td></td><td>List - I (Metal ion)</td><td></td><td>List - II (Group in Qualitative analysis)</td></tr><tr><td>(a)</td><td>${\mathrm{Mn}}^{2+}$</td><td>(i)</td><td>Group - III</td></tr><tr><td>(b)</td><td>${\mathrm{As}}^{3+}$</td><td>(ii)</td><td>Group - IIA</td></tr><tr><td>(c)</td><td>${\mathrm{Cu}}^{2+}$</td><td>(iii)</td><td>Group - IV</td></tr><tr><td>(d)</td><td>${\mathrm{Al}}^{3+}$</td><td>(iv)</td><td>Group - IIB</td></tr></tbody></table>Choose the most appropriate answer from the options given below :

Which of the following is correct structure of $\alpha$-anomer of maltose?

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. In the light of the above statements, choose the most appropriate answer from the options given below.

The major product (A) formed in the reaction given below is : 

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of ${\mathrm{Al}}_{2}{O}_{3}$ with cryolite. Reason (R) : The oxidation state of $\mathrm{Al}$ in cryolite is $+3.$ In the light of the above statements, choose the most appropriate answer from the options given below :

The total number of reagents from those given below, that can convert nitrobenzene into aniline is __________ . (Integer answer) I. $\mathrm{Sn}-\mathrm{HCl}$ II. $\mathrm{Sn}-{\mathrm{NH}}_{4}\mathrm{OH}$ III. $\mathrm{Fe}-\mathrm{HCl}$ IV. $\mathrm{Zn}-\mathrm{HCl}$ V. ${H}_{2}-\mathrm{Pd}$ VI. ${H}_{2}-$ Raney Nickel

 Consider the above reaction, compound B is: