Acid Catalysed Acetal Formation

Q.

The empirical formula of an acid is CH₂O. 0.0835 moles of the compound contains 1g of hydrogen. Molecular formula of the compound is ___

Q. Acid-catalysed dehydration of which of the following compounds is fastest?

1. t-Butanol
2. sec-Butanol
3. n-Butanol
4. All dehydrate at similar rate

Q.

Which is most easily dehydrohalogenated?

1. 

2. 

3. 

4. Both A and B

Q. Which of the following will give a solution having pH less than 7?

1. $C{H}_{3}COONa$
2. $NaCN$
3. $N{a}_{2}C{O}_3$
4. $N{H}_{4}Cl$

Q. Which of the following can not undergo $E_2$ reaction?

1. 
2. 
3. 
4. None of these

Q. 17.Define azeotrope and its two types(maximum boiling azeotrope and minimum boiling azeotrope).

Q. A solution of $(-)\text{-1-chloro-1-phenylethane}$ in toluene racemises slowly in the presence of a small amount of $SbC{l}_5$ due to the formation of:

1. Carbanion
2. Carbene
3. Carbocation
4. Free Radical

Q.

n-Propyl bromide reacts with ethanolic KOH to form:

1. Propane

2. Propene

3. Propyne

4. Propyl alcohol

Q. Which of the following will not give aldol condensation?

1. Phenyl acetaldehyde
2. Benzaldehyde
3. 1-Phenylpropanone

Q. Hydrolysis of borax by diagrams

Q. Of the following, which compound is an acetal?

1. 
2. 
3. 
4. 

Q. Acetaldehyde, in the presence of dilute alkalies gives :

1. An acetal
2. An aldol
3. Mesitylene
4. Propionaldehyde

Q. 3Give reasons for the following:-(1)p- nitrochlorobenzene undergoes nucleophilic substitution faster thanchlorobenzene. Explain giving the resonating structure as well. (ii) lodoform is obtained by reactions of acetone with hypoiodite ion but not I ion.OR(ii)C

Q.

Toluene diisocyanate is used to prepare

1. Polyurethanes

2. Polyesters

3. Polyamides

4. Poly carbonates

Q. Acetal formation is a reversible reaction

Under what conditions, the reaction can be forced to proceed only in right (forward) direction?

1. Using excess of alcohol
2. Using high temperature
3. Using dilute acid and excess of alcohol
4. Using dry acid and excess of alcohol

Q. How many more carbon atoms are present in the amine formed from the reduction of a nitrile, than in the nitrile itself?

1. 1 or 2
2. 2
3. 0
4. 1

Q. $C{H}_{3}CHO+H_{2}NOH-\to C{H}_{3}CH=N-OH$ The above reaction occurs at:

1. pH = 1
2. pH = 4.5
3. any value of pH
4. pH = 12

Q.

Acetal or ketal is :

1. $\alpha$, $\omega$-dialkoxy compound
2. $\alpha$‑alkoxy alcohol

3. Gem dialkoxy compound

4. Vic dialkoxy compound

Q. iaryWhich of the following is not an allylic halide?la) 4-Bromopent-2-eneb)3-Bromo-2-methylbut-1-eneIc) 1-Bromobut-2-ene(d) 4-Bromobut-1-eneHaloalkanes contain halogen atom(s) attached11

Q. which one of the following complexes will have six isomers?(1)(Co(en)NH3Cl2)Cl (2)(Cr(H2O)4Cl2)Cl (3)(Co(ox)3)3 - (4)(Co(en)2Br2)Cl

Q. What will be the major product obtained in the reaction between tert butyl chloride with sodium methoxide?

Q. When Grignard reagent $C{H}_{3}MgBr$ is treated with water, we get

1. ethane
2. ethyl alcohol
3. methyl alcohol
4. methane

Q.

What is the order of preference of stability of carbocation.

Q. How many cyclic isomers of molecular formula C7H13Br can form 1-methylcyclohexan-1-ol on reaction with H2O/acetone/Ag(+) (consider only structural isomers)?

Q.

Acetal formation is a reversible reaction

Under what conditions, the reaction can be forced to proceed only in right (forward) direction ?

1. Using excess of alcohol

2. Using high temperature

3. Using dilute acid and excess of alcohol

4. Using dry acid and excess of alcohol

Q.
Above compounds can be differentiated by which of the following reagent :

1. 2, 4 DNP (Brady reagent )
2. Tollen's reagent
3. Lucas reagent
4. All of the above

Q. How to find facial and meridional isomers

Q. Q The number of isomers of [Co(dien)Cl3] (Where dien is diethylene triamine) (1) 2 (2) 3 (3) 4 (4) 5

Q. Which of the following will be the product of the given reaction?

1. 
2. 
3. 
4. 

Q.

Acetal formation is a reversible reaction

Under what conditions, the reaction can be forced to proceed only in right (forward) direction ?

1. Using excess of alcohol

2. Using high temperature

3. Using dry acid and excess of alcohol

4. Using dilute acid and excess of alcohol