Bromine Water Test

Q.

Ethene when treated with Br₂ in the presence of CCl₄ which compound is formed

1. 1, 2-dibromoethane

2. 1-bromo-2-chloroethane

3. Both (a) and (b)

4. 1, 1, 1 - tribromoethane

Q.

The Conversion of an amide by action of NaOH and $B{r}_2$ to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction.

$R-\stackrel{\stackrel{O}{||}}{C}-N{H}_2\underset{\stackrel{\left(or\right)}{NaoBr}}{\overset{B{r}_2+NaOH}{\to }}R-N{H}_2+NaBr+N{a}_{2}C{O}_3$

1. 

2. 

3. 

4. 

Q. Carbene is formed as the reaction intermediate in:

Q. The major product obtained from the reaction of $2$-bromopentane with alc. $KOH$ is
[0.77 Mark]

1. Pentanol
2. Pent-2-ene
3. Pentan-2-ol
4. Pentene

Q. The reaction of $C_6{H}_5-CH=CHC{H}_3$ with $HBr$ produces:

1. 
2. 
3. $C_6{H}_{5}C{H}_{2}C{H}_{2}C{H}_{2}Br$
4. 

Q. Which one of the following test can be used to distinguish between aldehyde and ketone?

1. Fehling's solution
2. Tollen's reagent
3. Benedict's solution
4. All of these

Q. For which of the following compounds doesn't decolorise Baeyer’s reagent?

1. Cyclopentene
2. Cyclopentane
3. pent-1-ene
4. pent-2-ene

Q. Which of the following compounds is chiral?

1. 
2. 
3. 
4. 

Q. Benzene on reductive ozonolysis followed by hydrolysis gives:

1. 3 moles of $C{H}_2=C{H}_2$
2. 3 moles of $C_2{H}_2$
3. 3 moles of $CHO-CHO$
4. None of these

Q.

The Conversion of an amide by action of NaOH and $B{r}_2$ to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction.

$R-\stackrel{\stackrel{O}{||}}{C}-N{H}_2\underset{\stackrel{\left(or\right)}{NaoBr}}{\overset{B{r}_2+NaOH}{\to }}R-N{H}_2+NaBr+N{a}_{2}C{O}_3$

1. 

2. 

3. all of these

4. 

Q.

What is formalin? Give one use of it.

Q.

Of the possible structure of the molecular formula C5H11Br how many are optically active

Q.

How many no. Of total atoms Represented by CuSO​​​_​​​4​​CuSO4.5H₂O

Q.

What are examples of compounds and non-compounds?

Q. 28. For the given complex [CoCl2(en)(NH3)2]+, the number of geometrical isomers, the number of optical isomers and total number of isomers of all type possible respectively are

Q. Reaction of phenylacetylene with dil. $H_{2}S{O}_4$ and $HgS{O}_4$ will give the product:

1. Acetophenone
2. 2-Phenylethanol
3. Phenylacetaldehyde
4. Phenylacetic acid

Q. Which set of products are expected on reductive ozonolysis of the following diolefin?

1. $C{H}_{3}CHO;C{H}_{3}COCH=C{H}_2$
2. $C{H}_{3}CH=C\left(C{H}_3\right)CHO;C{H}_{2}O$
3. $C{H}_{3}CHO;C{H}_{3}COCHO;C{H}_{2}O$
4. $C{H}_{3}CHO;C{H}_{3}COC{H}_3;C{H}_{2}O$

Q. 13. How many isomers are possible for (CO (NH3)4CL2)CL draw

Q.

Which alkanes cannot be prepared by Wurtz reaction ?

Q. In Reimer Tiemann reaction dichlorocarbene acts as:

1. nucleophile
2. electrophile
3. free radical
4. all of these

Q. The total number of isomers of C4H7Br A 12 B 19 C 17 D 20 How to find Du

Q.

1. b

2. a

3. c

4. d

Q. Give $IUPAC$ name of the compound given below.

1. $2-$Chlorohexan$-5-$ol
2. $2-$Hydroxy$-5-$chlorohexane
3. $2-$Chloro$-5-$hydroxyhexane.
4. $5-$Chlorohexan$-2-$ol

Q.

An unsaturated hydrocarbon A adds two molecules of H2 ​and on reductive ozonolysis gives butane-1, 4-dial, ethanal and propanone. What will be the IUPAC name of ‘A.’

Q. 49 How many isomers [Co(en)2Br2]Cl has? A 4 B 6 C 5 D 3

Q. The maximum number of stereoisomers possible for 2-hydroxy-2-methylbutanoic acid is

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

Q. Give a chemical test to distinguish between
(a) saturated and unsaturated compounds.

Q. Reaction of HBr with propene in presence of peroxides gives:

1. $Isopropylbromide$
2. allyl bromide
3. 3-bromopropane
4. n-propyl bromide

Q. Give the structures of A, B and C in the following reactions :


(i) $C_6{H}_{5}N{O}_2\stackrel{Sn+HCl}{\to }A\underset{273K}{\overset{NaN{O}_2+HCl}{\to }}B\stackrel{H_{2}O}{\to }C$

(ii) $C{H}_{3}CN\stackrel{H_{2}O/H^{+}}{\to }A\underset{\Delta }{\overset{N{H}_3}{\to }}B\stackrel{B{r}_2+KOH}{\to }C$

Q.

Write two examples of:

Compounds