Aldehydes, Ketones & Acids · JEE Main previous year questions

Sulphonamides act as

1. A.Antiseptic
2. B.Analgesic
3. C.Antimicrobials
4. D.Antipyretic

Which of the following on heating with aqueous $\mathrm{KOH}$, produces acetaldehyde ?

1. A.$\mathrm{C}{\mathrm{H}}_3\mathrm{COCl}$
2. B.$\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{Cl}$
3. C.$\mathrm{C}{\mathrm{H}}_2\mathrm{ClC}{\mathrm{H}}_2\mathrm{Cl}$
4. D.$\mathrm{C}{\mathrm{H}}_3\mathrm{CHC}{\mathrm{l}}_2$

In Cannizzaro reaction given below $2\mathrm{PhCHO}\stackrel{:\stackrel{(-)}{\mathrm{O}}\mathrm{H}}{\to }\mathrm{PhC}{\mathrm{H}}_2\mathrm{OH}+\mathrm{PhC}{\ddot{\mathrm{O}}}_2^{(-)}$ the slowest step is :

1. A.the transfer of hydride to the carbonyl group
2. B.the abstraction of proton from the carboxylic group
3. C.the attack of $:\stackrel{(-)}{\mathrm{O}}\mathrm{H}$ at the carboxyl group
4. D.the deprotonation of $\mathrm{PhC}{\mathrm{H}}_2\mathrm{OH}$

Among the following the one that gives positive iodoform test upon reaction with $I_2$ and $NaOH$ is

1. A.$\mathrm{C}{\mathrm{H}}_3-\mathrm{CH}(\mathrm{C}{\mathrm{H}}_3)-\mathrm{C}{\mathrm{H}}_2\mathrm{OH}$
2. B.$PhCHOHC{H}_3$
3. C.$C{H}_{3}C{H}_{2}CH(OH)C{H}_{2}C{H}_3$
4. D.$C_6{H}_{5}C{H}_{2}C{H}_{2}OH$

Which of the following is a polyamide?

1. A.Teflon
2. B.Nylon – 6, 6
3. C.Terylene
4. D.Bakelite

Consider the acidity of the carboxylic acids: (a) PhCOOH (b) o – $\mathrm{N}{\mathrm{O}}_2{\mathrm{C}}_6{\mathrm{H}}_4\mathrm{COOH}$ (c) p – $\mathrm{N}{\mathrm{O}}_2{\mathrm{C}}_6{\mathrm{H}}_4\mathrm{COOH}$ (d) m – $\mathrm{N}{\mathrm{O}}_2{\mathrm{C}}_6{\mathrm{H}}_4\mathrm{COOH}$ Which of the following order is correct?

1. A.(b) > (d) > (a) > (c)
2. B.(b) > (d) > (c) > (a)
3. C.(a) > (b) > (c) > (d)
4. D.(b) > (c) > (d) > (a)