Enantiomers

Q.

Dipole-Induced Dipole interactions are present in which of the following pairs:

1. ${\mathrm{H}}_2\mathrm{O}$ and Alcohol

2. $\mathrm{HCl}$ and $\mathrm{He}$ atoms

3. ${\mathrm{SiF}}_4$ and $\mathrm{He}$ atoms

4. ${\mathrm{Cl}}_2$ and ${\mathrm{CCl}}_4$ atoms

Q.

Using the Mulliken-barker test how the nitro group is detected?

Q.

A sample of ammonium phosphate ${\left(N{H}_4\right)}_{3}P{O}_4$ contains 3.18 moles of oxygen atoms the number of moles of oxygen atoms in the sample is

Q.

Explain the optical activity of 2-Chlorobutane

Q. The density of solid argon is $1.65g/mL$ at $-{233}^{o}C$. If the argon atom is assumed to be sphere of radius $1.54\times {10}^{-8}cm$, what percentage of solid argon is apparently the empty space?
$\text{Atomic weight of}Ar=40g/mol$
Take:
${1.54}^3=3.64$

1. $32$%
2. $52$%
3. $62$%
4. $72$%

Q. H- ion have larger size than f- why

Q. In the preparation of chlorobenzene from aniline, the most suitable reagent is

1. Nitrous acid followed by heating with $C{u}_{2}C{l}_2$
2. Chlorine in the presence of $AlC{l}_3$
3. Chlorine in the presence of ultraviolet light
4. None of these

Q.

Which of the following structures is enantiomeric with the molecule (A) given below?

Q. The number of isomers possible with the formula ${\text{C}}_3{\text{H}}_5{\text{Cl}}_3$ (including stereoisomer) is

1. 
   3
2. 
   4
3. 
   5
4. 
   6

Q.

The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane?

Q. Which of the following is incorrect about a pair of enantiomers?

1. Both enantiomers will be optically active and have equal but opposite specific rotations
2. Each enantiomer will be non-superimposable on the other
3. Each enantiomer will be a mirror image of the other
4. A pair of enantiomers will behave similarly in a chiral environment

Q. Assuming 2s – 2p mixing to be inoperative, the number of diamagnetic species among the following is

$B{e}_2^{+},B_2,C_2,N_2,NO,O_2,O_2^{–},F_2{,}^{–}CN,N{O}^{+}$

1. Only $C_2,NO,O_2$
2. Only $B_2,N_2,F_2{,}^{–}CN{,}^{+}NO$
3. Only $C_2,NO,O_2,O_2^{–}$
4. Only $B_2,N_2,F_2$

Q.

Which types of isomerism are shown by 2, 3-dichlorobutane?

1. Optical isomerism

2. Geometric isomerism

3. Diastereo isomerism

4. Structural isomerism

Q.

If optical rotation produced by the compound (A) is $+{52}^{\circ }$, the one produced by compound (B) is:

1. Unpredictable

2. $-{52}^{\circ }$

3. $+{52}^{\circ }$

4. $0^{\circ }$

Q. An alkane $C_8{H}_{18}$ is obtained as the only product subjecting a primary alkyl halide to the Wurtz reaction. On monobromination, this alkane yields a single isomer of a tertiary bromide. Write the structure of alkane and the tertiary bromide.

Q. Which is not the pair of enantiomers?

1. 
2. 
3. 
4. 

Q. What is the number of oxygen atoms which are shared between tetrahedrons in Si309-6

Q. $C{H}_3-C{H}_2-CH=CH-CHBr-CH=CH-C{H}_2-C{H}_3$
When the mixture of all stereoisomers of the given compound is subjected to fractional distillation, in how many fractions they will get separated?

Q. A chiral compound and its mirror image are to each other.

1. enantiomers
2. cis/trans isomers
3. tautomers

Q. The perpendicular from A on the side BC of ABC intersects BC at D such that DB=3CD. Prove that 2ABsquare = 2ACsquare+BCsquare.

Q.

Does Light have the Mass?

Q. 12. A molecule having molecular formula c8h18 can show only one monobromo derivatives . Find its structural formula

Q. In the preparation of chlorobenzene from aniline, the most suitable reagant is

1. $\text{Nitrous acid followed by heating with}C{u}_{2}C{l}_2$
2. $\text{Chlorine in the presence of}AlC{l}_3$
3. $\text{Chlorine in the presence of ultraviolet light}$
4. $\text{None of these}$

Q.

Which of the following are pairs of enantiomers?

1. D-Lactic acid and (+)-Lactic acid

2. D-Lactic acid and (-)-Lactic acid

3. 2R-2-bromobutane and 2S-2-bromobutane

4. 2R, 3S-2, 3-dihydroxybutanedioic acid and 2S, 3R-2, 3dihydroxybutanedioic acid

Q. For the given reaction sequence choose the correct option(s):

1. $A$ is :
   
2. $B$ is :
   
3. $A$ is :
   
4. $B$ is :
   

Q.

Two possible stereo-structures of $C{H}_{3}CH\left(OH\right)COOH$ which are optically active, are called:

1. Diastereomers

2. Atropisomers

3. Enantiomers

4. Mesomers

Q. For each of the following pair, deduce the stereochemical relationship, i.e., whether they are enantiomers, diastereomers or identical.

Q. $C{H}_3-C{H}_2-CH=CH-CHBr-CH=CH-C{H}_2-C{H}_3$
When the mixture of all stereoisomers of the given compound is subjected to fractional distillation, in how many fractions they will get separated?

Q.
number of chiral carbon in (M) \(= x\)


Number of Geometrical isomers in (N) \(= y\)

The value of \(\dfrac{y}{x}\) is:
(N)
(N)

Q. A racemic mixture of enantiomers is optically inactive.

1. True
2. False