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1.

Which of the following species can not exhibit geometrical isomerism ?A. B. C. D.

Answer» Correct Answer - 4
Discussion
2.

The general molecular formula , which represents the homologous series of alkanol isA. `C_(n)H_(2n)O_(2)`B. `C_(n)H_(2n)O`C. `C_(n)H_(2n+1)O`D. `C_(n)H_(2n+2)O`

Answer» Correct Answer - 4
Discussion
3.

When a nitrogen containing organic compound is strongly heated with conc. `H_(2)SO_(4)` , the product is `-`A. `HNO_(3)`B. `(NH_(4))_(2)SO_(4)`C. `NH_(3)`D. `N_(2)` gas

Answer» Correct Answer - 2
Discussion
4.

Which of the following statement is incorrect ?A. A meso compound has chiral centres but does not exhibit optical activity.B. If a molecule is dissymmetric, it rotate the plane of plane polarized light.C. A meso compound is optically inactive because the rotation caused by any molecule is cancelled by an equal and opposite rotation caused by another molecule that is the mirror image of the first.D. The twc diastereomers have same structure formula but different physical and chemical properties

Answer» Correct Answer - 3
Meso compound is optically inactive due to internal compensation of optical rotation.
Discussion
5.

Correct name for the following compound is `:` `Cl-CH_(2)-overset(O)overset(||)(C)-O-overset(O)overset(||)(C)-CH_(2)-Cl`A. Bis ( Chloroacetic anhydride)B. Bis(Chloroethanoic anhydride)C. Chloroethanoic anhydrideD. `1-`Chloroethanoyloxy`-2-`chloroethenone

Answer» Correct Answer - 3
`Cl-underset(2)(CH_(2))-underset(1)overset(overset(O)(||))(C)-O-underset(1)overset(overset(O)(||))(C)-underset(2)(CH_(2))-Cl` chloro acetic anhydride or chloro ethanoic anhydride
Discussion
6.

In which compund `D-` exchange is possible in presence of `OD^(-) // D_(2)O` ?A. `CH_(3)-overset(O)overset(||)(C)-Ph`B. `CH_(2)=CH-overset(O)overset(||)(C)-Ph`C. D. `CH_(3)-underset(" "C_(2)H_(5))underset(|)overset(Cl)overset(|)(C)-CH=CH-CHO`

Answer» Correct Answer - 1
`CH_(3)-overset(O)overset(||)(C)-Ph overset(OD^(-)//D_(2)O)(hArr) CH_(2)=overset(OD)overset(|)(C)-Ph hArr underset("(D-exchange)")(CH_(2)D-overset(O)overset(||)(C)-Ph)`
Discussion
7.

Which of the following hydrocabon can give only acetone and `CO_(2)`on ozonolysis in presence of Zince ?A. `CH_(3)-CH=C=CH-CH_(3)`B. `CH_(3)-CH=CH-CH=C(CH_(3))_(2)`C. `(CH_(3))_(2)C-C=CH_(2)`D. `CH_(3)-underset(" "CH_(3))underset(|)(C)=C=underset(" "CH_(3))underset(|)C-CH_(3)`

Answer» Correct Answer - 4
`CH_(3)-underset(underset(CH_(2))|)(C)=C=underset(underset(CH_(3))|)(C)-CH_(3)overset((i)O_(3)(ii)Zn,H_(2)O)rarr2CH_(3)-CO-CH_(3)("Acetone")+CO_(2)`
Discussion
8.

The given structures are `: A. Chain isomersB. Postion isomersC. Functional isomersD. metamers

Answer» Correct Answer - 3
Both have same molecular formula but different degree of amine so called functional isomers.
Discussion
9.

Identify the compound and find the relation between them . A. Conformational isomers or identicalB. Configurational diastereomerC. Configurational enantiomersD. Constitutional isomers

Answer» Correct Answer - 2
Both the isomers are not mirror image of each other so called configurational diastereomers.
Discussion
10.

Which of the following compound has non superimposable mirror image `-`A. B. C. D.

Answer» Correct Answer - 1
Discussion
11.

Which of the following compound is achiral ( optically inactive )?A. `1-`Bromo`-2-`chlorocyclopropaneB. (Trans)`-2-`Methyl hex`-3-`eneC. `2-`Methyl butanalD. `2,2,4-`Trimethyl hexane

Answer» Correct Answer - 2
Trans`-2-`methylhex`-3-`ene does not has chiral carbon.
Discussion
12.

The following compounds can be distinguished by A. Neutral `FeCl_(3)`B. Ammonical `AgNO_(3)`C. `2,4-DNP`D. `NaHCO_(3)` solution

Answer» Correct Answer - 2
`Ph-CD=O ` gives silver mirror with ammonical `AgNO_(3)` but `Ph-COCH_(3)` does not give silver mirror with ammonical `AgNO_(3)`.
Discussion
13.

Which statement is correct for the given reaction `:` A. The reactant and the products in the above reaction have `(S)` configuration.B. In this reaction no bond to the chiral centre is broken so there is retention of configuration in the product.C. Reactant and product both can be distinguished by `NaHCO_(3)` or Lucas reagentD. All are correct.

Answer» Correct Answer - D
Discussion
14.

A research scholar get a mixture of three product during an experiment with ammonia. In product I only one H of ammonia is replaced by ethyl group and in II two H atoms of ammonia are replaced by ethyl groups and in III all the H- atoms are replaced by ethyl groups. Which test he should use to distinguish or separate the products `:`A. Carbyl amine testB. Iodoform testC. Fehling solution testD. Hinsberg test

Answer» Correct Answer - 4
Discussion