Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Carboxylic acid in which Hell-Volhard-Zelinsky reaction cannot be carried out?

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ANSWER :B
2.

Carboxylic acid group can be tested by all the following tests except

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ferric CHLORIDE SOLUTION test
sodium BICARBONATE test
dye formation test
ester formation test.

Answer :C
3.

Carboxylic acid donot give characteristic property of

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R - group
`- COOH `group
`GT C = O` group
`- O - H` group

ANSWER :C
4.

Carboxylic acid dissolve in aq. NaOH because the acid undergo :

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PROTONATION
DEPROTONATION
CARBOXYLATION
Decarboxylation

Answer :B
5.

Carboxylic acid can

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decompose CARBONATE and evolve `CO_(2)`
reactswith metal forming `H_(2)` GAS
NEUTRALISE ammonium hydroxide FORM salt
all of the above

ANSWER :D
6.

Carboxylic acids are more soluble in

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Ether
Benzene
`N_2CO_3` OLUTION
`CHCl_3`

ANSWER :C
7.

Carboxy radicals formed from benzoyl peroxide on_____________ gives phenyl radical.

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 DEACYLATION
dehydrogenation
decarboxylation
 DEHALOGENATION

ANSWER :C
8.

Carborundum is the commercial name of :

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`Al_2O_3`
`CA(H_2PO_4)_2`
`H_3PO_4`
SiC

Answer :D
9.

Carborandum and dry ice are _____and_____type of crystal respectively

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SOLUTION :COVALENT and MOLECULAR
10.

Carbonyl group undergoes :

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Electrophilic ADDITION REACTION
NUCLEOPHILIC addition reactions
Both (a) and (b)
None

Answer :B
11.

Carbonyl group show characteristic reaction of nucleophilic addition in which nucleophile attack in rate determing step on carbonyl carbon. Which of the reactant show geometrical isomerism when it react with hydrazine (NH_(2)–NH_(2))

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ANSWER :D
12.

Carbonyl group show characteristic reaction of nucleophilic addition in which nucleophile attack in rate determing step on carbonyl carbon. Which P^(H) is suitable for oxime formation

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`4-5`
`1-2`
`8-10`
`12-14`

ANSWER :A
13.

Carbonyl group in aromatic aldehyde and ketone is

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<P>o-DIRECTING
p-directing
o-and p- directing
m - directing

ANSWER :D
14.

Carbonyl compound(s) which will not reduce Fehling's solution is/are

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`(AAK_MCP_37_NEET_CHE_E37_038_A01)`

ANSWER :D
15.

Carbonyl compounds when treated with sodium bisulphate solution then generally a crystalline sodium bisulphite addition product is formed but which of the following carbonyl compound does not forms crystalline addition product

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`C_2 H_5 COC_2 H_5`
`CH_3 CHO`
`CH_3COCH_3`
`HC HO`

ANSWER :A
16.

Carbonyl compounds when treated with sodium bisulfite solution generally a crystalline sodium bisulfite addition product is formed but which of the following carbonyl compound not. Forms crystalline addition product:

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HCHO
`CH_3CHO`
`CH_3COCH_3`
`C_2H_5COC_2H_5`

ANSWER :D
17.

Carbonylcompounds undergonucleophilic addition reactions. Justify.

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ANSWER :1
18.

Carbonyl compounds undergo electrophilic additon reactions

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ANSWER :F
19.

Carbonyl compounds give different oxidation products withdifferent reagents. Several oxidising agents can be used to oxides carbonyl compound. Ammonical silvernitrate (Tollens' reagent) oxidises aliphitic as well as aromatic aldehydes. R-CHOoverset("Tollenes reagent ")rarrR-COOH+Ag("Silver mirror") Strong oxidising agents like KMnO_(4)//H^(+),HNO_(3) K_(2)Cr_(2)O_(7)//H^(+) oxidise aldehydes as well as ketones. Open chain ketnoes on oxidation give mixture of two carboxylic acids. Oxidation of unsymmetrical ketones takes place acording to Popoff's rule. According to this rule, alpha whose bond breks in oxidation always belongs to thealkyl group which has more number of carbons. Which of the following ismost reactive towards oxidation ?

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HCHO
`CH_(3)CHO`
`CH_(3)-overset(O)overset(||)C-CH_(3)`
`CH_(3)-CH_(2)-CHO`

ANSWER :A
20.

Carbonyl compounds give different oxidation products withdifferent reagents. Several oxidising agents can be used to oxides carbonyl compound. Ammonical silvernitrate (Tollens' reagent) oxidises aliphitic as well as aromatic aldehydes. R-CHOoverset("Tollenes reagent ")rarrR-COOH+Ag("Silver mirror") Strong oxidising agents like KMnO_(4)//H^(+),HNO_(3) K_(2)Cr_(2)O_(7)//H^(+) oxidise aldehydes as well as ketones. Open chain ketnoes on oxidation give mixture of two carboxylic acids. Oxidation of unsymmetrical ketones takes place acording to Popoff's rule. According to this rule, alpha whose bond breks in oxidation always belongs to thealkyl group which has more number of carbons. 2-Methylcycolhexanone on oxidation will give :

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`HOOC(CH_(2))_(5)-COOH`
`HOOC(CH_(2))_(3)-OVERSET(CH_(3))overset(|)(CH)-COOH`
`HOOC-CH_(2)-overset(CH_(3))overset(|)(CH)-(CH_(2))_(2)-COOH`
`CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(2)-CH_(2)-COOH`

Answer :B
21.

Carbonyl compounds give different oxidation products withdifferent reagents. Several oxidising agents can be used to oxides carbonyl compound. Ammonical silvernitrate (Tollens' reagent) oxidises aliphitic as well as aromatic aldehydes. R-CHOoverset("Tollenes reagent ")rarrR-COOH+Ag("Silver mirror") Strong oxidising agents like KMnO_(4)//H^(+),HNO_(3) K_(2)Cr_(2)O_(7)//H^(+) oxidise aldehydes as well as ketones. Open chain ketnoes on oxidation give mixture of two carboxylic acids. Oxidation of unsymmetrical ketones takes place acording to Popoff's rule. According to this rule, alpha whose bond breks in oxidation always belongs to thealkyl group which has more number of carbons.The prduct of given reaction is

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`HOOC-(CH_(2))_(4)-COOH`
`CH_(3)(CH_(2))_(4)-COOH`

Answer :A
22.

Carbonyl compounds give different oxidation products withdifferent reagents. Several oxidising agents can be used to oxides carbonyl compound. Ammonical silvernitrate (Tollens' reagent) oxidises aliphitic as well as aromatic aldehydes. R-CHOoverset("Tollenes reagent ")rarrR-COOH+Ag("Silver mirror") Strong oxidising agents like KMnO_(4)//H^(+),HNO_(3) K_(2)Cr_(2)O_(7)//H^(+) oxidise aldehydes as well as ketones. Open chain ketnoes on oxidation give mixture of two carboxylic acids. Oxidation of unsymmetrical ketones takes place acording to Popoff's rule. According to this rule, alpha whose bond breks in oxidation always belongs to thealkyl group which has more number of carbons. The reagent which oxidises only aliphatic ketones is :

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Tollens' REAGENT
Fehlings' SOLUTION
BAEYER reagent
`K_(2)aCr_(2)O_(7)//H^(+)`

Answer :D
23.

Carbonyl compound which contains alpha-H gives aldol condenation reaction in presence of alkaline medium. The reaction between two molecules of acetaldehyde take placeas follows in presence of base Aldol condensation reaction is given by

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`C_(6)H_(5)-CHO`
`CX_(3)-CHO`

`C_(6)H_(5)-CH_(2)-CHO`

Answer :D
24.

Carbonyl compounds can serve both as reductant and oxidant, such processes being termed as disproportionation reactions. When non enolisable aldehydes are treated with strong aqueous or alcoholic base, one molecule of aldehydes undergoes reduction to alcohol while another molecule undergoes oxidation to acid. This disproportionation is the result of a nucleophilic addition of hydroxide ion to the aldehyde carbobyl to give a tetrahedral intermedate which can then regenerate the carbonyl group either by expelling hydroxide ion (to revert to aldehyde) or, by expelling hydride ions (to revert to carboxylic acid). Above reaction is

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proton-hydride transfer reaction
given by non enolizable aldehydes
third order OVERALL, FIRST order in hydroxide and SECOND order in aldehyde
first order in aldehyde and first order in hydroxide.

Solution :
`2RCHO+OH^(-)rarr`
rate = `k[RCHO]^(2)[OH^(-)]`
25.

Carbonyl compound reacts with phenyl hydrazine to form :

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Oxime
Phenylhydrazone
Hydrazone
Semicarbazone

Answer :B
26.

Carbonyl chloride reacts with ammonia to from :

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`CO_2`
`NH_2CONH_2`
`CH_3COONH_4`
`CH_3CONH_2`

ANSWER :D
27.

Carbonyl chloride is a …………… gas.

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ANSWER :POISONOUS
28.

T/F Carbonyl chloride is also known as phosphine

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ANSWER :F
29.

Carbongene has X% of CO_(2) and is used as an antidote for poisoning of Y. Then, X and Y are:

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X=95% and Y= LEAD poisoning
X=5% and Y=CO poisoning
X=30% and Y=`CO_(2)` poisoning
X=45% and Y=CO poisoning

Answer :B
30.

Carbonation of organometallic reagent

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is a ONE CARBON homologation
INVOLVES its carbanionic ATTACKS on electrondeficient carbonyl carbon
both are correct
none is correct

Answer :C
31.

Carbonation of Grignard reagents involves the reaction of a _________with _____.

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SOLUTION :Grignard REAGENT, dry ICE or solid `CO_(2)`.
32.

Carbonation of Grignard reagent followed by hydrolysis gives

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aldehyde
acid
KETONE
PRIMARY ALCOHOL

ANSWER :B
33.

Carbonation of CH_(3)MgI gives an organic compound. This compound is also obtained by

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hydrolysis of acetonitrile by a mineral acid
OXIDATION of methyl alcohol
hydrolysis of isoacetonitrile by a mineral acid
hydrolysis of methyl FORMATE with DILUTE mineral acid

Solution :Carbonation of `CH_(3)MGI " forms "CH_(3)COOH`.
Hydrolysis of acetonitrile by a mineral acid also forms `CH_(3)COOH`.
34.

Carbonates of Ba,Sr and Ca are

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WHITE
Blue
Green
Yellow

Solution :All are white in COLOUR
35.

Carbonate ores are usually subjected to calcination, while sulphide ores are subjected to roasting. Comment on the statement.

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Answer :CARBONATE ORES are decomposed to the oxide by CALCINATION. But sulphide ores are to be oxidised to metal oxide and `SO_2` be heting to HIGH TEMPERATURE with excess of air. This is known as roasting. Oxygen containing ores are subjected to calcination.
36.

Carbonate ores are mostly of

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GROUP 1 elements b) group
group 2 element
group 3 elements
group 4 elements

Solution : Carbonate ores are MOSTLY of IIA group elements (or) group 2 elements
37.

Carbonate or hydroxide ores are generally converted to their oxides by

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Roasting
Calcination
Smelting
Fluxing

ANSWER :B
38.

Carbon tetrachloride reacts with steam at 500^@C to give:

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`Cocl_2`
`CHCl_3`
BOTH(A) and (B)
none

Answer :A
39.

Carbon tetrachloride on treatment with (Fe) / (H_2O) gives:

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Chloromethane
Methane
Chloroform
Methylene chloride

Answer :C
40.

Carbon tetrachloride is used in fire extinguishers under the name of :

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Freon
Pyrene
Phosgene
GAMMEXANE

ANSWER :B
41.

Carbon tetrachloride has zero dipole moment because of :

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PLANAR structure
Smaller size of C and Cl atoms ab
Regular TETRAHEDRAL structure
None of the above

Answer :C
42.

Carbon tetrachloride and water are immiscible wheres ethyl alcohol and water are miscible in all proportions. Explain.

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SOLUTION :Ethyl alcohol and WATER are both POLAR while `C CI_(4)` is non-polar.
43.

Carbon suboxide (C_(3)O_(2)) has recently been shown as a component of the atmosphere of Venus. Which of the following formulation represents the correct ground state Lewis structure for carbon suboxide?

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`:O:C::C:C:O:`
`:O::C::C:C::O:`
`:OVERSET(..)(O)::C::C::C::overset(..)(O):`
`:O:C:C:C:C:`

Solution :In c each C and O atom has OCTET of ELECTRONS.
44.

Carbon reduction method is used in the extraction of :

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SN
Zn
Pb
All

Answer :D
45.

Carbon reduction method is used in the extraction of:

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Sn
Fe
Pb
All

Answer :D
46.

Carbon reduction is not used to obtain Cr and Mn because

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Process is not thermodynamically feasible.
Process is not ECONOMICALLY feasible.
Interstitial compounds are formed by CR and Mn with CARBON at high temperature
Cr and Mn are high melting metals.

ANSWER :C
47.

Carbon reduction is used for the extraction of :

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Fe
K
Al
None

Answer :A
48.

Carbon reacts with strong electropositive metal oxides to form:

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Carbide
Carbonate
Hydroxide
Oxide

Answer :A
49.

Carbon reacts with oxygen to from two oxides, CO and CO_2.This is because :

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Carbon has TWO CRYSTALLINE forms
Carbon has two OXIDATION states
Oxygen donates as well as ACCEPTS electrons
Oxygen has a strongaffinity for carbon.

Answer :B
50.

Carbon reacts with chlorine to form "CC"l_(4).36gm of carbon was mixed with 142 g of Cl_(2). Calculate massof "CC"l_(4) produced and the remaining mass of reactant .

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ANSWER :154 GM, 24 gm