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.

Bakelite is obtained from phenol by reaction with

Answer»

acetaldehyde
acetal
forinaldehyde
chlorobenzene

Solution :forinaldehyde
Discussion
2.

Bakelite is obtained from phenol by reacting with

Answer»

`(CH_2OH)_2`
`CH_3CHO`
`CH_2COCH_3`
HCHO

Solution :Phenol and FORMALDEHYDE undergo condensation polymerisation under two different conditions to give a cross LINKED polymer CALLED BAKELITE
Discussion
3.

Bakelite is obtained by the reaction between phenol and which of the following ?

Answer»

`HCHO`
`(CH_(2)OH)_(2)`
`CH_(3)COOH`
`CH_(3)COCH_(3)`

SOLUTION :`HCHO`
Discussion
4.

Bakelite is obtained by the condensation of phenol with :

Answer»

ACETALDEHYDE
FORMALDEHYDE
BENZALDEHYDE
hexamethlene diamine.

Answer :B
Discussion
5.

Bakelite is obtained by the reaction between phenol and …………….

Answer»

CHLORO BENZENE
acetal
acetaldehyde
FORMALDEHYDE

SOLUTION :formaldehyde
Discussion
6.

Bakelite is obtained by substitution reaction. Is it true or false?

Answer»

SOLUTION :POLYMERISATION REACTION
Discussion
7.

Bakelite is not a condensation polymer. Is it true or false

Answer»

SOLUTION :TEFLON is not a CONDENSATION POLYMER.
Discussion
8.

Bakelite is formed when phenol reacts with ………………. .

Answer»

METHANOL
METHANAL
ETHANAL
Ethanol

Solution :Methanal
Discussion
9.

Bakelite is formed by the chemical combination of phenol and ______.

Answer»

SOLUTION :FORMALDEHYDE
Discussion
10.

Bakelite is an example of

Answer»

LINEAR polymer
Branched CHAIN polymer
Cross LINKED polymer
Thermoplastic polymer

Answer :C
Discussion
11.

Bakelite is a thermosetting plastic produced by .............

Answer»

`HCHO + C_6H_5CH_2OH`
`HCHO + C_6H_5OH`
`CH_3CHO + C_6H_5OH`
`HCHO + CH_3COCH_3`

SOLUTION :`HCHO + C_6H_5OH`
Discussion
12.

Bakelite is a polymer of

Answer»

benzaldehyde and phenol
FORMALDEHYDE and phenol
formaldehyde and BENZYL alcohol
ACETALDEHYDE and phenol

Answer :B
Discussion
13.

Bakelite is a copolymer of:

Answer»

HCHO and MALAMINE
HCHO and phenol
Phenol and ETHYLENE
None

Answer :B
Discussion
14.

Bakelite is a

Answer»

melamine formaldehyde polymer
BUTYL rubber
phenol formaldehydepolymer
phenol urea polymer

ANSWER :C
Discussion
15.

Bakelite is a/an

Answer»

ADDITION POLYMER
thermoplastic polymer
elastomer polymer
thermosetting polymer

ANSWER :D
Discussion
16.

Bakelite is a product of reaction between

Answer»

Formaldehyde resin
PHENOL formaldehyde resin
ARTIFICIAL rubber
None of these

Answer :B
Discussion
17.

Bakelite is :

Answer»

ADDITIONAL polymer
Elastomer
Thermoplastic polymer
Thermosetting polymer

Answer :D
Discussion
18.

Bakelite can be prepared from which monomer ?

Answer»

BENZALDEHYDE and phenol
FORMALDEHYDE and phenol
Formaldehyde and BENZYL ALCOHOL
Acetaldehyde and phenol

SOLUTION :Formaldehyde and phenol
Discussion
19.

Bakelite.

Answer»

SOLUTION :It is used in the MANUFACTURE of PHOTGRAPH records, electrical GOODS, fountain pen, BARRELS, etc.
Discussion
20.

Baeyer's reagent is used to detect………….. unsaturation in an organic compound.

Answer»

CHLORIDE ion
UNSATURATED ORGANIC COMPOUND
Sulphate ion
Chromate ion

Solution :unsaturated organic compound
Discussion
21.

Baeyer's reagent is used in the laboratory for

Answer»

DETECTION of DOUBLE BONDS
Detection of glucose
Reduction
Oxidation

Answer :A
Discussion
22.

Baeyer's reagent is used for detecting ......... in an organic compounds.

Answer»

SOLUTION :UNSATURATION
Discussion
23.

Baeyer's reagent is:

Answer»

ALKALINE PERMANGANATE solution
Acidified permanganate solution
Neutralpermanganate solution
Aqueous BROMINE solution

Answer :A
Discussion
24.

Baeyer's reagent is __________

Answer»

Zn|Hg in Conc HCl
acidified `K_(2)Cr_(2)O_(7)`
cold ALKALINE `KMnO_(4)`
SODIUM borohydride

Answer :C
Discussion
25.

Baeyer's process is used for the purification of bauxite containing ___________as chief impurity .

Answer»

`SiO_(2)`
`CaCO_(3)`
`Fe_(2)O_(3)`
ZnO

Answer :C
Discussion
26.

Bad conductor of electricity is:

Answer»

`H_2F_2`
HCl
HBr
HI

Answer :A
Discussion
27.

Bactericidal antibiotics among the following

Answer»

TETRACYCLINE
ERYTHROMYCIN
Ofloxacin
Chloramphenicol

ANSWER :C
Discussion
28.

Bacterial decomposition of cellulose material present in sewage water gives.

Answer»

`H_2`
`CH_4`
`O_2`
`N_2`

ANSWER :B
Discussion
29.

Bactericidal antibiotics among the following is

Answer»

OFLOXACIN
ERYTHROMYCIN
chloramphenicol
tetracycline.

Solution :Ofloxacin is bactercidal antibiotic while erythromycin, chloramphenicol and tetracycline are bacteriostatic ANTIBIOTICS.
Discussion
30.

Bacteria convert molecular nitrogen into:

Answer»

`NO_3`
AMINO ACIDS
`NO_2`
`NH_3`

ANSWER :C
Discussion
31.

BaCl_2 solution gives a white ppt. with a solution of a slat, which dissolves in dil. HCl with the evolution of a colourless, pungent smelling gas. The radical in the salt is

Answer»

`SO_(4)^(2-)`
`HSO_(4)^(-)`
`SO_(3)^(2-)`
`CO_(3)^(2-)`

Solution :`SO_(3)^(2-) +BA^(2+) to underset("White ppt.")(BaSO_(3) darr)`
`BaSO_(3)+2HCL to BaCl_(2) +H_(2)O +underset("smelling gas")underset("Pungent")(SO_(2) uarr)`
Discussion
32.

BaCl_2 lsolution gives a white ppt, with a solution of an acid radical which dissolves in dil. HCI with the evolution of a colourless, pungent smelling gas. The acid radical may be

Answer»

`SO_(4)^(2-)`
`S^(2-)`
`SO_(3)^(2-)`
`CO_(3)^(2-)`

Solution :`SO_(3)^(2-) + Ba^(2+) to underset("White PPT.")(BaSO_(3))`
`BaSO_(3) + 2 HCl to BaCl_2 + SO_2 uarr + H_(2) O`
Discussion
33.

BaBr_(2) givesyellow ppt with AgNO_(3) as well aswith K_(2)CrO_(4).

Answer»

<BR>

SOLUTION :`BaBr_(2) + AgNO_(3) rarr UNDERSET(YELLOW ppt )(AgBr darr (due to Br^(Theta))`
`BaBr_(2) + K_(2)CrO_(4) rarr underset(yellow ppt )(BaCrO darr (due to Ba^(2+))`
Hence TRUE
Discussion
34.

BaBr_(2) in aq solution giveyellow ppt ,with (a)____ as well as with (b)___.

Answer»


ANSWER :a.`K_(2)CrO_(4)` b. `AgNO_(3)`
Discussion
35.

Ba, Sr, Ca and Mg may be arranged in order of decreasing first ionisation energy (IE_1) as:

Answer»

MG, CA, SR, BA
Ca, Sr, Ba, Mg
Sr, Ba, Mg, Ca
Ba, Mg, Ca, Sr

Answer :A
Discussion
36.

B_2O_3is :

Answer»

Ionic
Basic
Acidic
Amphoteric

Answer :C
Discussion
37.

B_2H_6+NH_3toAddition compound (X) overset(450 K)to Y+Z(g) In the above sequence Y and Z are respectively :

Answer»

Borazine and hydrogen
BORON and hydrogen
Boron nitride and hydrogen
Borazine and hydrogen

Solution :`3B_2H_5+6NH_3 to underset([X])(3[BH_2(NH_3)_2][BH_4])overset(450 K)tounderset([y])(2B_3N_3H_3)+underset([z])(12H_2)`
Discussion
38.

B_(2)H_(6)+NH_(3) underset("Heating")overset("Slowly") to X overset(Delta) to Y Which of the following around X is correct.

Answer»

`X` is ionic in NATURE, Hybridisation state of `B` in both cationic and anionic PART is same.
`X` is ionic in nature, hybridisation state of `B` in cationic and anionic part are DIFFERENT.
`Y` is COVALENT and hybridisation state of all `B` is not same.
`Y` is ionic and hybridisation state of all `B` are same.

Solution :
In `X` hybridisation state of both `B` is `sp^(3)`
Discussion
39.

B_(2)H_(6) is symmetrically cleaved by:

Answer»

`NH_(3)`
`CH_(3)NH_(2)`
`(CH_(3))_(2)NH`
none of these

Answer :D
Discussion
40.

B_(2)H_(6)+6CH_(3)OHtoA. Identify A

Answer»

`B_(2)O_(3)`
`CH_(3)OB`
`CH_(3)OH`
`B(OCH_(3))_(3)`

ANSWER :D
Discussion
41.

B_(10)C_(2)H_(12) is isostructural & isoelectronic with borate ion of formula B_(x)H_(y)^(2-) give x+y+z.

Answer»


SOLUTION :N//A
Discussion
42.

Write the structure of oleum (H_(2)S_(2)O_(7))

Answer»

SOLUTION :
Discussion
43.

Write the structure of Maltose.

Answer»

SOLUTION :B)
Discussion
44.

Write the relationship between equilibrium constant of the reaction and standard potential of the cell.

Answer»

Solution :The relationship between equilibrium constant of the reaction and standard POTENTIAL of the cell is
w.r.t
`E_("cell")=0=E_("cell")^(Theta)-(2.303RT)/(NF)LOG""([A])/([C])`
`E_("cell")^(Theta)=(2.303RT)/(nF)log""([A])/([C])"….(1)"`
`([A])/([C])=K_(C )"….(2)"`
(2) in (1)
`E_("cell")^(@)=(2.303 RT)/(nF)logK_(C )`
`E_("cell")^(Theta)=(0.059)/(nF)logK_(C )`
Discussion
45.

Write the name of monomers required to manufacture Buna-N rubber. Write the polymerization reaction for the same.

Answer»

Solution :MONOMERS required to MANUFACTURE Buna-N rubber is.
i) 1,3-Butadiene
ii) Acrylonitrite
The polymerization reaction for the Buna. `- N` is
`underset("1, 3 - Butadiane")(CH_(2)=CH-CH=CH_(2))+nCH_(2)underset("Acrylo nitrile")(=underset(CN)underset("|")"CH"OVERSET(Na)underset("Heat")rarr)underset("Buna - N")([-CH_(2)-CH=CH-CH_(2)-CH_(2)-underset(CN)underset(|)CH-]_(n))`
Discussion
46.

b) Write the missing product: NH_(3)+3Cl_(2"(excess)")rarr?+3HCl.

Answer»

SOLUTION :`NH_(3)+3Cl_(2"(EXCESS)")rarrNCl_(3)+3HCl`
`rArr" Nitrogen trichloride"`
Discussion
47.

Write the equation for the formation of the polymer by the interaction of ethylene glycol and terephthalic acid. Name the polymer.

Answer»

Solution :DACRON or TERYLENE is manufactured by heating a mixture of ethylene GLYCOL and terepathalic acid at 420 to 460 K in the presence of zinc acetate - antimony TRIOXIDE catalyst it is one of the CONDENSATION polymerisation.

The polymer is Decron (or) Terylene (or) PETP
Discussion
48.

Write the difference between physisorption and chemisorption with respect to i) type of attractive forces between adsorbate and adsorbent ii) number of layers of adsorption.

Answer»

Solution :The DIFFERENCE between physisorption and chemisorption with RESPECT to
i) TYPE of attractive FORCES
in physisorption vander waal.s forces
in chemisorption chemical bonds formation
II) number of layers of adsorption
in physisorption :- Multi molecular layer
in chemisorption :- Unimolecular layer
Discussion
49.

Write the composition of copper matte.

Answer»

SOLUTION :The COMPOSITION of COPPER matfe is `Cu_(2)S+FeS`
Discussion
50.

(b) Write any two differences between an electrolytic and a Daniell cell.

Answer»

SOLUTION :
Discussion