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.

Give the common and IUPAC names of the compound , CH_(2) = CH - CO - CH = CH_2

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SOLUTION :The common name of `CH_(2) =CH - CO - CH = CH_2` is divinyl ketone . IUPAC name is 1, 4 - pentadien -3- one.
Discussion
2.

Give two examples of crystals showing this defect.

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SOLUTION :AGCL,AGBR
Discussion
3.

Give an example of emulsion.

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SOLUTION :MILK and and COD.
Discussion
4.

Give the co-ordination number of La in the compound Na[La EDTA (H_(2)O)_(4)].3H_(2)O (Here EDTA^(4-) shows it's maximum denticity.)

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SOLUTION :Co-ordination NUMBER `=1xx6+4xx1 implies10`
`"EDTA"^(4-)` is HEXADENTATE.
Discussion
5.

Give two examples of corrosion.

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Solution : RUSTING of IRON and TARNISHING of silver are EXAMPLES of corrosion.
Discussion
6.

Give two examples of colligative properties.

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SOLUTION :(i) LOWERING of VAPOUR pressure. (ii) OSMOTIC pressure.
Discussion
7.

Give the classification of polymers obtained from esters of acrylic acid (CH_(2)=CH.COOH).

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SOLUTION :
Discussion
8.

Give two examples of antidepressants.

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SOLUTION : IPRONIAZID, PHENELZINE.
Discussion
9.

Give the classification of proteins based on molecular shape.

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Solution :Based on its molecular shapes, the proteins are classified as FIBROUS proteins and the Globular proteins.
(i) Fibrous proteins : The proteins that consist of linear, thread like polypeptide chains arranged or twisted to form a fibre are called fibrous proteins. In fibrous proteins, the polypeptide chains run parallel and are held together by hydrogen and disulphide bonds. These proteins are INSOLUBLE in water. Some common EXAMPLES are keratin (present in silk, hair, wool) and myosin (present in muscles) etc.
(ii) Globular proteins : In these types of proteins, the polypeptide chains are folded to give SPHEROIDAL shape. These proteins are water soluble. Proteins such as insulin, albumin etc. are globular proteins.
Discussion
10.

Give two examples of amorphous solid.

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SOLUTION :GLASS and PLASTIC.
Discussion
11.

Give the classification of amino acids based on number of amino and carboxyl groups.

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Solution :(i) Acidic amino acids : The amino acids with greater NUMBER of carboxyl groups COMPARED to amino groups are called acidic amino acids. For example, aspartic acid, glutamic acids etc. are acidic amino acids.
(ii) Basic amino acids : The amino acids with greater number of amino group than carboxyl group are called basic amino acids. For example, arginine, LYSINE etc.
(iii) NEUTRAL amino acids : The amino acids with equal number of carboxyl and amino groups are called neutral amino acids. For example, alanine, phenyl alanine, Leucine etc.
Discussion
12.

Give two examples for Strong acid (ii) Give two examples for Strong base

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SOLUTION :STRONG ACID: `HClO_4,H_2SO_4`
Discussion
13.

Give two examples each of thermoplastic and thermosetting plastics.

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Solution :THERMOPLASTIC polymers: Polythenes, POLYVINYLS.
THERMOSETTING polymers : Bakelite, urea-formaldehyde.
Discussion
14.

Give the class of drug in which Salvarsan belong ?

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SOLUTION :ANTIMICROBIAL (ANTIBACTERIAL)
Discussion
15.

Give the chemical test to distinguish between (a) Hexane (I), MeCH=CHCl (II), Propylchloride (III), and CH_(2)=CHCH_(2)Cl (IV) (b) (V) CH_(3)Cl, (VI) CH_(3)Br, and (VII) CH_(3)I

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Solution :a. (IV) is allyl CHLORIDE which reacts with `AgNO_(3)` in cold to givea white precipiate of `AgCl, (I)` does not have `(Cl)` group so no reaction.
(III) is `1^(@) RX` which REACTSWITH `AgNO_(3)` in hot to give a white precipiate of `AgCl`, since `(II)` is less reactivbe than `(IV)`
(II) is vinyl chloride which is inert even when heatedand doesnot give white precipitate with `AgNO_(3)`.
(I) can be distinugulashed from others by adding `Br_(2)` in `CCl_(4)` to each the red-brown colour of `Br_(2)` is not decolourised by `(I)` while inothers (alkens) it dissapers.
b. `(V) CH_(3)Cl overset(Aq. NaOH)(rarr) CH_(3) OH + Cl overset(Ag NO_(3))(rarr) underset(NH_(3))underset("soluble in")underset("White ppt"..,)(AgCl)`
`(VI) CH_(3) Br underset(NaOH)overset(Aq.)(rarr) CH_(3)OH + Br^(@) overset(Ag NO_(3))(rarr) underset("in" NH_(3))underset("Partly sounle")underset("ppt"..:)underset("Pale yellow")(AgBr)`
Discussion
16.

Give two examples for alloy

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ANSWER :STAINLESS STEEL, NICKEL steel
Discussion
17.

Give the class of drug in which Bithional belong ?

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SOLUTION :ANTISEPTIC
Discussion
18.

Give two example of ores which can be concentrated by magnetic separation method.

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SOLUTION :1. HAEMATITE , `Fe_2O_3`, 2. MAGNETITE, `Fe_3O_4`.
Discussion
19.

Give the class of drug in which Amoxycillin belong ?

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SOLUTION : BROAD SPECTRUM ANTIBIOTIC
Discussion
20.

Give two example of organic compounds used as antiseptics.

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SOLUTION :(i) PHENOL `(0.2%)`
(II) IODOFORM.
Discussion
21.

Give the chemical tests to distinguish between the following pairs of compounds : (i) Ethylamine and Aniline "" (ii) Aniline and Benzylamine

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Solution :(i) Ethylamine and Aniline : Take the two compounds in two separate test tubes. Add DIL. HCl to both to dissolve the substance. Add sodium nitrite solution to both the test tubes and cool the test tubes to `5^(@)C`. Add alkaline solution of phenol to both the test tubes. An orange DYE will be obtained in the test TUBE containing aniline.
(II) Aniline and Benzylamine : Take one mL of aniline and benzylamine separately in two test tubes. Add dil. HCl to dissolve. Add one mL of dil. solution of sodium nitrite.
A brisk effervescence is obtained in the test tube containing benzylamine due to the following REACTION :
`""C_(6)H_(5)CH_(2)NH_(2)+HNO_(2) rarr C_(6)H_(5)CH_(2)OH+N_(2)uarr+H_(2)O`
Discussion
22.

Give the chemical reaction when ethanal is heated with hydrogen iodide and red phosphorus under high pressure.

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Solution :ALDEHYDES are reduced to ALKANES.
`underset("Ethanal")(CH_(3)CHO)+4HI overset("red P,pressure")to underset("Ethane")(CH_(3)CH_(3)+2I_(2)+H_(2)O`
Discussion
23.

Give two equations to illustrate the chemical behaviour of phosphine.

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Solution :(i) Phosphine reacts with halogens to GIVE phosphorous penta halides.
`PH_(3)+4Cl_(2)rarr PCl_(5)+3HCl`
(ii) Phosphine forms coordination compound with lewis ACIDS such as boron trichloride.
`BCl_(3)+PH_(3)rarr underset("Coordination compound")([Cl_(3)Blarr :PH_(3)])`
(iii) Phosphine precipitates some METAL from their salt solutions.
`3AgNO_(3)+PH_(3)rarr Ag_(3)P+3HNO_(3)`
Discussion
24.

Give the chemical test of distinguish between : CH_(3)CHO and CH_(3)-overset(O)overset(||)C-CH_(3)

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Solution :`CH_(3)CHO` GIVES TOLLEN's reagent test. `CH_(3)CHO+2AgNO_(3)+2NH_(4)OH to CH_(3)COOH+underset("Silver mirror")(2Ag+2NH_(4))NO_(3)+2H_(2)O`.
Discussion
25.

Give two example of food preservatives.

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SOLUTION :Sorbic ACID (or its SALT) and SODIUM BENZOATE.
Discussion
26.

Give two example of antihistamine drug.

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SOLUTION :TERFENADINE (SELDANE) and Brompheniramene.
Discussion
27.

Give the chemical reactions involved in the leaching of alumina from bauxite

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Solution :`Al_(2)O_(3)(s)+2NaOH(aq)+3H_(2)O(L)to2Na[Al(OH)_(4)]`
`2Na[Al(OH)_(4)]+CO_(2)toAl_(2)O_(3).xH_(2)O+2NaHCO_(3)`
`Al_(2)O_(3).xH_(2)O(s)overset(1470K)(to)Al_(2)O_(3)(s)+xH_(2)O(g)`
Discussion
28.

Give two difination of solubility of a substance. Show that the total vapour pressure over that solution of two liquids A and B at a p[articular temprature varies linerluy wioth the mole fraction of the solute.

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Solution :It may be defined as the MAXIMUM amount of the SLUTE that can desso=ilve in 100 grams of the solvent to from a saturated solution at a given temperature.
For ANSWER consult section 6. (Ideal and non-ideal SOLUTIONS)
Discussion
29.

Give the chemical test of distinguish between : CH_(3)CHO and C_(6)h_(5)CHO.

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SOLUTION :`CH_(3)CHO` gives brick RED ppt. `CH_(3)CHO+2CuSO_(4)+4NaOH to CH_(3)COOH +underset("Brick red ppt.")(Cu_(2)O+N)aSO_(4)+2H_(2)O`
Discussion
30.

Give two differences between white phosphorus and red phosphorus.

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SOLUTION :
Discussion
31.

Give the chemical reactions showing oxidizing nature of potassium dichromate

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Solution :In acidic medium, the dichromate ion act as very good oxidizing agent.. The reaction can be represented as: `Cr_(2)O_(7)^(2-) + 14H^(+) + 6E^(-) rarr 2Cr^(3+) + 7H_(2)O (E^(@) = +1.33V)`
Acidified dichromate solution oxidizes iodides to iodine, sulphides to sulphur, Sn(II) to Sn(IV), Fe(II) to Fe(III) etc. The half reactions of each species are:
(i) `6I^(-) rarr 3I_(2) + 6e^(-)`
(ii) `3H_(2)S rarr 6H^(+) + 3S+ 6e^(-)`
(iii) `3Sn^(2+) rarr 3Sn^(4+) + 6e^(-)`
(iv) `6Fe^(2+) rarr 6Fe^(3+) + 6e^(-)`
The full ionic reaction can be obtained by adding half-reaction of potassium dichromate to the half reaction for the reducing agent
Ex: `Cr_(2)O_(7)^(2-) + 14H^(+) + 6Fe^(2+) rarr 6Fe^(3+) + 2Cr^(3+) + 7H_(2)O`
Discussion
32.

Give two differences between Starch and Cellulose.

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SOLUTION :
Discussion
33.

Give the chemical reaction to support that +5 oxidation state of Bi is less stable than +3 state.

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Solution :Due to INERT pair effect, Bi can show +3 and +5 oxidation states. SINCE the inert pair effect is maximum in case of Bi, therefore, its +5 oxidation STATE is less STABLE than +3 oxidation state. This is evident from the observation that `BiCI_(3)` even on prolonged heating with `CI_(2)` does not form `BiCI_(5)`
Discussion
34.

Give any two differences between Frenkel and Schottky defects.

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Solution :`{:("S.No.","Schottky defect","Frenkel defect"),((i),"Density DECREASES","No CHANGE in density."),((ii),"Observed when cations and ANIONS","Observed when cations and anions"),(,"have similar size.","differ in their size."),((iii),"Equal number of cations and anions","The smaller ion gets dislocated from"),(,"are missing from lattice points","its lattice point. "):}`
Discussion
35.

Give two differences between peptides and proteins.

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SOLUTION :
Discussion
36.

Give the chemical names of two detegents.

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SOLUTION :SODIUM dodecyl SULPHATE and sodium dodecyl BENZENE sulphonate.
Discussion
37.

Give the chemical names of two compounds acting as soap.

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SOLUTION :SODIUM (or POTASSIUM) stearte (or OLEATE or PALMITATE)
Discussion
38.

Give two differences between linear polymers and branched chain polymers.

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Solution :Linear POLYMERS : HIGH density, m.pt, tensile STRENGTH , branched-chain polymers : low density, m. pt., tensile strength
Discussion
39.

Give the chemical formula of potassium hexacyanoferrate(II). What is the common name for this compound?

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Solution :`K_(4)[Fe(CN)_(6)]`
Potassium Ferrocyanide
Discussion
40.

Give the chemical formula of potassium hexacyano ferrate (II)

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Solution :`K_(4)[FE(CN)_(6)]`
Discussion
41.

Give two differences between p-type & n-type semiconductors.

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SOLUTION :
Discussion
42.

Give the chemical formula for the compound potassium hexacyanocobaltate(III).

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SOLUTION :`K3[CO(CN)_(6)]`
Discussion
43.

Give the structure of Cumene.

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ANSWER :`C_6H_5CH(CH_3)_2.`
Discussion
44.

GivetwodifferencesbetweenAmyloseandAmylopectin.

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Solution :`{:("Amylose",,"AMYLOPECTIN"),((i)" Watersolublecomponent ofthestarch.",,"Waterinsolublecomponent ofthestarch."),((ii)" Linearpolymerof " PROP "-D- glucoseunits",,"Branched polymerof" prop " - D - Glucoseunits"):}`
Discussion
45.

The composition of .copper matte. is,

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SOLUTION :`Cu_(2)S+` traces of FES or cuprous SULPHIDE + traces of ferrous sulphide.
Discussion
46.

Givetwo difference between Hormonesand vitamins.

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SOLUTION :
Discussion
47.

Give the characteristics of first order reaction.

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Solution :(i) When the concentration of the reactant is increased by 'n' times, the rate of reaction is also increased by n times. That is, if the concentration of the reactant is doubled, the rate is doubled.
(ii)The UNIT of rate constant of a first order reaction is `sec^(-1)` or `"time"^(-1)`.
`k_(1)=("rate")/((a-x))=("mol lit"^(-1)sec^(-1))/("mol lit"^(-1))`
(iii) The time required to complete a definite FRACTION of reaction is independent of the initial concentration, of the reactant if `t_(1//u)` is the time of one 'u' th fraction of reaction to take PLACE then from equation.
`k_(1)=(2.303)/(t)"log"(a)/(a-x)`
`x=(a)/(u)` and `t_(1//u)=(2.303)/(k_(1))"log"(a)/(a-(a)/(u))`,
`t_(1//u)=(2.303)/(k_(1))"log"(u)/((u-1))`
SINCE, `k_(1)=` rate constant, `t_(1//u)` is independent of initial concentration 'a'.
Discussion
48.

Give the cell reactions for following cells : underset("(1 M)")(Al(s)|Al^(3+)(aq))"||"underset("(1 M)")(Cu^(2+))(aq)|Cu(s)

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Solution :`{:((LHE):2AL to2Al_((AQ))^(3+)+6e^(-)),("(Oxidation half reaction) (At -ve electrode)"),((RHE):3Cu_((aq))^(2+)+6e^(-)to3Cu),("(Reduction half reaction) (At +ve electrode)"),(ulbar(" OVERALL cell reaction" : 2Al_((s))+3Cu_((aq))^(2+)to2Al_((aq))^(3+)+3Cu_((s))"")):}`
Discussion
49.

Give two difference between Hormones and vitamins

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SOLUTION :
Discussion
50.

Give the bond energies of N equiv N, H-H and N-H bonds as 945, 436 and 391 kJmol^-1 respectively, the enthalpy of the following reaction N2(g)​ +3H2(g)​ →2NH3(g)​is:

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`-93 KJ`
102 kJ
90 kJ
105 kJ

Answer :A
Discussion