Cross Aldol Condensation

Q. Benzaldehyde, when heated with conc, KOH solution gives

Q. Number of stereoisomers possible for - 1-bromo-4-chlorocyclohexane .

Q.

Which of the following compounds has been incorrectly matched?

1. (CH₃)₂ C = CH-COOH 3-methylbut-2-enoic acid

2. 

3. (CH₃)2 CH CH₂ CH₂ Br 1-bromo -3-methylbutane

4. 

Q.

n - butane can be obtained from

I) n - butyl chloride / Zn + HClII)sec. butyl iodide / Zn - Cu couple

III) Sodium n - valerate / NaOH + CaOIV) Sodium propionate / Kolbe's electrolysis

1. I, II, III, IV

2. I, III, Iv

3. I, II, IV

4. I, III

Q. Product formed by monobromination of methyl benzoate is

Q. In a set of reaction acetic acid yields a product [D]. The structure of [D] would be:
$C{H}_{3}C{H}_{2}COOH\stackrel{SOC{l}_2}{\to }A\underset{Anhy.AlC{l}_3}{\stackrel{C_6{H}_6}{}}B\stackrel{HCN}{\to }C\stackrel{HOH}{\to }D$

1. 
2. 
3. 
4. 

Q. What is the difference between all the possible aldol products formed by ethanal and propanal with dilute NaOH and their corresponding dehydrated $\alpha ,\beta$ unsaturated aldehydes?

Q. Neopentylbromide react with CH_3O^- major product will be, it will give E1(unimolecular elimination or E2 reactio

Q. A carbonyl compound should have at least $\alpha -$ hydrogen to undergo aldol condensation.

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

Q. Benzaldehyde, when heated with conc, KOH solution gives