Important Long Questions Of Chemistry 2nd Year Chapter 12

Important Long Questions Of Chemistry 2nd Year

FSC Important Long Questions Of Chemistry 2nd Year chapter wise MCQs, short questions and long questions.

 Chapter 12 MCQs Short and  Important Long Questions of  Chemistry 2nd Year

Aldehydes And Ketones

Each question has four possible answers. Select the correct answer and circled it.       

v  The carbon atom of carbonyl group is

(A) Sp-hybridized                        

(b) Sp² hybridized            

(c) Sp³ hybridization       

(d) None of them

v  Formalin is a

(a) 10% solution of formaldehyde in H₂O          

(b) 20% solution of form aldehyde in water       

(c) 40% solution of Formaldehyde in water       

(d) 60% solution of formaldehyde in water

v  Which of the following will have the highest boiling point

(a) Methanol                    

(b) Ethanol                       

(c) Propanol                     

(d) Hexanone

v  Ketones are prepared by the oxidation of

(a) Primary alcohol          

(b) Secondary Alcohol

(c)Tertiary alcohol          

(d) None of them

v  What is the name of this compound C₆H₅-CO-CH₃

(a) Aceto phenone           

(b) Methyl phenyle Ketone         

(c) Benzo phenone           

(d) a and b

v  Which one of them is the formula of carotonaldehyde

(a)CH₃-CH=CH-CH-O                                        

(b) CH₂=CH-CH-O

(c)CH₃-CH₂-CH₂-CHO                                        

(d) None of them

v  Which of the following reagents will react with both aldehyde and kethones

(a) Grignard’s reagent     

(b) tollens regent

(c)  Fehling solution        

(d) Benedict solution

v  Sodium nitro prusside test is given for

(a) Aldehyde                    

(b) Ketone                                    

(c) Carboxylic acid          

(d) both a and b

v  Acid catalysed nucleophillic addition reaction will take place with

(a) Weak nucleophillic reagent                           

(b) Strong nucleophillic reagent

(c)  Very strong nucleophillic reagent                

(d)  B and c

v  Aldehyde and Kethones form precipitate with 2,4 dinitrophyle  hydrazine

(a) Yellow             (b) red                        

(c) White               (d) a and b

B).       Give Short Answer of the following                                                                       

1.         How will you prepare the iodoform from Acetone.

2.         How will you prepare the lactic acid from Acetablehyde cyano hydrine.

3.         How will you convert Acetone into tertiary butyl alcohol

4.         How will you convert ethanol into ethanoic acid.

5.         How will you prepare secondary Alcohol by Catalytic Reduction of Ketone.

Q.No.2.                                                                                                                                  

(a)         What is aldol condensation give two examples. Also write the Mechanism of Aldol. Condensation.

(b)       What products are formed when Acetaldehyde and acetone reacts with following

            (i) Hydroxylamine

           (ii) Phenyl Hydridize

           (iii) 2,4 dinitro phenyl hydrazine.

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