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.

Mention th.e enthalpy of mixing (Delta_(mix))value to form an ideal solution.

Answer»

SOLUTION :ZERO or 0 or `Delta_(MIX)` H = 0 .
Discussion
2.

Mention the elements which show anomalous electronic configuration in transition elements.

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Solution :Chromium and COPPER in FIRST SERIES SHOW ANOMALOUS configuration.
Discussion
3.

Mention the coordination number, hybridisation and geometry of the following compounds. (i) [Ni(CN)_(4)]^(2-) (ii) [Fe(CO)_(5)] (iii)[CO(NH_(3))_(6)]^(3+)

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SOLUTION :
Discussion
4.

Mention the correct order of stability of dihalides of Si, Ge, Sn and Pb.

Answer»

`GeX_(2) lt SiX_(2) lt SnX_(2) lt PbX_(2)`
`SiX_(2) lt GeX_(2) lt PbX_(2) lt SnX_(2)`
`SiX_(2) lt GeX_(2) lt SnX_(2) lt PbX_(2)`
`PbX_(2) lt SnX_(2) lt GeX_(2) lt SiX_(2)`

Answer :C
Discussion
5.

Mention the coordination number, hybridisation and geometry of the following compounds. (i) [CuCl_(2)]^(-) (ii) [HgI_(3)]^(-) (iii)Ni(CO)_(4)

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SOLUTION :
Discussion
6.

The principle goal of chemical synthesis is to maximize the conversion of reactants into products. Le-Chatlier's principle can be applied to achieve this goal. Preidct the conditions to be applied to maximize the production of ammonia in the following reaction: N_(2(g))+3H_(2(g))iff2NH_(3(g)) DeltaH=-92.38kj mol^-1

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SOLUTION :HIGH PRESSURE, optimum temperature (700 K), presence of iron catalyst and presence of 'potassium OXIDE and aluminium oxide as promoters.
Discussion
7.

Mention the conditions in which the following statement are correct. (a) Chlorine is a good bleaching agent (b) A mixture of H_(2) and Cl_(2) explodes. (c ) Cl_(2) reacts with NaOH solution to produce sodium chloride and sodium hypochlorite (along with water). (d) Cl_(2) reacts with NaOH solution to produce sodium chloride and sodium chlorate (along with water). (e ) Cl_(2) substitutes hydrogen atoms of a molecule of methane. (f) Cl_(2) reacts with ammonia to form nitrogen and ammonium chloride. (g) Cl_(2) reacts with lime to form bleaching powder. (h) Iodine dissolves freely in water. (i) Chlorine forms an addition product with SO_(2).

Answer»

Solution :(a) In presence of moisture, chlorine acts as a good bleaching agent.
(B) A mixture of `H_(2)` and `Cl_(2)` explodes on exposure to direct sunlight.
(c ) `Cl_(2)` reacts with `NaOH` solution to produce `NaCl` , sodium hypochlorite and `H_(2)O` in cold and dilute conditions.
(d) When `NaOH` solution is hot and concentrated it reacts with `Cl_(2)` to produce sodium chloride, sodium chlorate and water. (e) In diffused sunlight, `Cl_(2)` substitutes hydrogen atoms of a molecule of methane.
(f) when `NH_(3)` is in excess, it reacts with `Cl_(2)` to form `N_(2)` and `NH_(4)Cl`.
(G) On passing `Cl_(2)` over dry slaked lime, bleaching POWDER is formed.
(h) Iodine dissolves freely in water in presence of `KI`.
(i) In dry conditions, `Cl_(2)` FORMS an addition product with `SO_(2)`.
Discussion
8.

Mention the conditions required to maximise the yield of ammonia.

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Solution :Ammonia is PREPARED by the Haber.s process. Optimum conditions for the MANUFACTURE of ammonia are as under:
`N_2(g) + 3H_2(g) overset({:( 700 K "," 200 xx 10^5 PA),("Iron oxide " + K_2O + Al_2O_3 "(catalyst)"),("Mo-( promoter)"):})(iff) 2NH_3 (g) , Delta_f H^(@) = -92.4 kJ " mol"^(-1)`
In accordance with Le Chatelier.s principle, to maximise the yield, a high pressure of `200 xx 10^(5)` Pa is used. To increase the rate of the reaction, a temperature of around 700 K is used and iron oxide mixed with some `K_2O and Al_2O_3` is used as a catalyst. Sometimes, Mo is also used as a promoter to increase the efficiency of the Fe catalyst.
Discussion
9.

Mention the condition to maximise the yield of ammonia.

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Solution :Ammonia is prepared by the Haber's process.
`{:(,""700 K", "200 xx 10^(5) Pa,),(,"Iron oxide " +K_(2)O + Al_(2)O_(3)"(catalyst)",),(N_(2) (g) + 3H_(2) (g),overset("Mo (promoter)")(hArr),2 NH_(3)(g),Delta_(f)H^(@)=-92.4 kJ mol^(-1)):}`
In accordance with Le Chatelier's principle, to maximize the yield, a high pressure of 200 `xx 10^(5)` Pa is used. To increase the RATE of the reaction, a temperature of around 700 K is usd and iron oxide mixed with some `K_(2)O and Al_(2)O_(3)` is used as a catalyst. Sometimes, Mo is also used as a promoter to increase the efficiency of the FE catalyst.
Discussion
10.

Mention the concentration of H^(+) ions in the solution used in SHE.

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SOLUTION :1 MOLAR OR 1 M
Discussion
11.

Mention the compound not containing any chiral carbon atom ?

Answer»

2-methyl BUTANAL
2,2-dimethyl PROPANOIC ACID
2-hydroxy propanoic acid
1,2-dichloro PROPANE

Answer :B
Discussion
12.

Mention the colour of halogens.

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Solution :Fluorine has yellow colour, CHLORINE has greenish yellow. BROMINE is RED in colour and IODINE has violet colour.
Discussion
13.

Mention the chief use of quaternary ammonium salts derived from long chain amines.

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SOLUTION :The quaternary ammonium salts DERIVED from long CHAIN aliphatic amines are USED as detergents. For EXAMPLE,
` [CH_3(CH_2 )overset(+ )N (CH_3 )_3 ]Cl^(-)`
Discussion
14.

Mention the biological importance of insulin.

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Solution :Regulates / MAINTAINS BLOOD SUGAR level.
Discussion
15.

Mention the application of Xenon?

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Solution :(i) Xenon is used in FLUORESCENT BULBS, flash bulbs and lasers.
(ii) Xenon emits an intense light in DISCHARGE TUBES instantly. Due to this it is used in high speed electronic flash bulbs used by PHOTOGRAPHERS.
Discussion
16.

Mention the application of Aluminium

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SOLUTION :Aluminium is the most abundant metal and is a good conductor of electricity and heat .It also resists corrosion .The following are some of its applications.
Many heat EXCHANGES /sinks and our day to day in packing materials for food items,
Aluminium is not very strong ,However ,its alloys with copper,mangnesse,magnesium and SILICON are light weight and strong and they used in design of aeroplanes and other forms of transport.
As Aluminium shows HIGH resistance to corrosion ,it is used in the design of chemical reactors,medical equipments ,refrigeration units and gas pipelines.
Aluminium is a good ELECTRICAL conductor and cheap,hence used in electrical overhead electric cables with steel core for strength.
Discussion
17.

Mention the application of Xenon ?

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Solution :(i) Xenon is used in FLUORESCENT bulbs, flash bulbs and LASERS.
(ii) Xenon emits an INTENSE light in discharge tubes instantly . Due to this it is used in HIGH SPEED electronic flash bulbs used by photographers.
Discussion
18.

Mention the allotropic forms of phosphorous?

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Solution :The most common allotropic FORM form of phosphorous ?
(i) WHITE phosphorous (II) Red phosphorous (III) Black phosphorous
Discussion
19.

Mention the allotropes of phosphorous?

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Solution :(i) White phosphorous (II() Red phosphorous (iii) SCARLET phosphorous
(iv) VIOLET phosphorous (v) BLACK phosphorous
Discussion
20.

Mention the allotropes of boron.

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Solution :(i) Amorphous BORON (ii) `alpha` -RHOMBOHEDRAL boron
(III) `BETA`- rhombohedral boron (IV) `gamma`- rhombohedral boron
(v) `alpha`- tetragonal boron (vi) `beta`- tetragonal boron
Discussion
21.

Mention one use of ZSM-5 catalyst.

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SOLUTION :In DEHYDRATION of alcohols in formation of SYNTHETIC GASOLINE.
Discussion
22.

Mention one use of Westrosol.

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ANSWER :As ORGANIC SOLVENT
Discussion
23.

Mention one use of hydrazine.

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SOLUTION :Being COMBUSTIBLE, it is USED as a ROCKET FUEL.
Discussion
24.

Mention one use of drug meprobamate.

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SOLUTION :ANTIDEPRESSANT DRUG.
Discussion
25.

Mention one use of each of the following: (i) Ranitidine (ii) Paracetamol (iii) Tincture of iodine.

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Solution : (i) Rnitidine is used as an antacid.
(ii) Paracetamol is used to BRING down the BODY temperature during high fever.
(iii) Tincture of IODINE is used as an ANTISEPTIC. It is 2-3% solution of iodine in alcohol and WATER.
Discussion
26.

Mention one use each of the following drugs : (i) Ranitidine (ii) Paracetamol (iii) Tincture of iodine

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Solution :(i) RANITIDINE is USED as ANTACID.
(ii) Paracetamol is used as analgesic and antipyretic DRUG.
(iii) Tincture of IODINE is used as antiseptic.
Discussion
27.

Mention one property which is caused due to the presence of F-centre in a solid.

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Solution :F-centre is RESPONSIBLE for the colour and PARAMAGNETIC BEHAVIOUR of the solid.
Discussion
28.

Mention one property of hydrazine.

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SOLUTION :It is combustible and hence it is used as a ROCKET PROPELLANT.
Discussion
29.

Mention one important use of each of the following : (i) Equanil (ii) Sucrolose

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Solution :(i) EQUANIL is tranquilizer.
(II) Sucralose is ARTIFICIAL sweetner.
Discussion
30.

Mention one criterion for intermolecular collisions of two reactants to be effective.

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SOLUTION :PROPER orientation of MOLECULES (or) ENERGY of activation of the molecules
Discussion
31.

Mention one difference between a catalyst and a inhibitor.

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Solution :A CATALYST INCREASES the rate of a reaction but a INHIBITOR reduces the rate of a reaction.
Discussion
32.

Mention one commercial use of N, N-Dimethylaniline.

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ANSWER :It is USED in the PREPARATION of AZO DYES.
Discussion
33.

Mention hybridisation state of carbon in CO_3^(2-) and CO_2.

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SOLUTION :`SP^2` and sp RESPECTIVELY
Discussion
34.

Mention four colligative properties.

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SOLUTION :(i) Osmotic pressure.
(ii) Lowering of vapour pressure.
OR
Relative Lowering of vapour pressure.
(iii) ELEVATION of BOILING point.
(IV) Depression in freezing point.
Discussion
35.

Mention Freundlinch adsorption isothermal equation.

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SOLUTION :Freundlinch ADSORPTION isotherm
`x/m=kp^(1//N)`
where x is the AMOUNT of adsorbate or adsorbed on .m. gm of ADSORBENT at a pressure of p.k and n are constants.
Discussion
36.

Mention any two uses of colloids.

Answer»
Discussion
37.

Mention any two reasons for the anomalous behaviour of oxygen.

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Solution :Oxygen SHOWS a COVALENCY of 2 in general and rarely 4.
Oxygen is a gas while other elements are SOLIDS at ROOM temperature.
Discussion
38.

Mention any two methods of preparation of nitro methane.

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Solution :(i) `underset("methane")(CH_(4_(G)))+Conc. HNO_(3)underset("Red HOT Si tube")overset(675K)(to)underset("nitro methane")(CH_(3)NO_(2))+H_(2)O`
(ii) `underset(alpha-"chloro acetic acid")(Cl-CH_(2)-COOH)+NaNO_(2)underset(S_(N^(2)))overset(H_(2)"O"//Delta)(to)underset("NItromethane")(CH_(3)NO_(2))+CO_(2)uarr`
Discussion
39.

Mention any two main objectives of the United Nations.

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Solution :The UN's man OBJECTIVES purposes :
i. Maintaining worldwide peace and security.
ii. Developing relations among nations.
or
FOSTERING cooperation between nations in order to solve economic, SOCIAL, CULTURAL, or humanitarian international problems.
Or any TWO relevant points
Discussion
40.

Mention any two factors which influence the rate of the reaction.

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SOLUTION :Rate of a reaction DEPENDS on various factors like
(i) Concentration or PRESSURE of the reactant.
(ii) NATURE of the reactants
(iii) Temperature
(iv) Catalyst
(v) presence of light.
Discussion
41.

Mention any two factors which affects the conductivity of electrolytic solution.

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SOLUTION :i. NATURE of the ELECTROLYTE
II. TEMPERATURE of the solution.
Discussion
42.

Mention any two differences between ideal and non-ideal solutions.

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Solution :The two DIFFERENCES between Ideal & non - Ideal SOLUTIONS are :
`{:("Ideal","Non Ideal"),("i.OBEY Raoult.s at all range of concentration and temperature.","i.Do not obey Raoult.s low at all range of concentration and temperature."),("ii. " Delta H_("MIXING")=0." Neither heat is evolved nor absorbed during DISSOLUTION","ii." Delta H_("mixing")ne 0", Either heat is evolved or absorbed during dissolution."):}`
Discussion
43.

Mention any two characteristics of bonding molecular orbitals.

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Solution :Bonding MOLECULAR ORBITALS are formed by the additive overlapping of atomic orbitals. It has the lower energy than the atomic orbitals from which is formed. Electron density in the internuclear region is high and so the band is STABLE. Electrons occupying molecular orbitals SHOWS bonding effort.
Discussion
44.

Mention any two applications of co-ordination compounds.

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Solution :(i) Co-ordination compounds are used as catalysts for many industrial processes.
(ii) The pigment responsible for photosynthesis, chlorophyll, is a co-ordination COMPOUND of magnesium
(iii) Haemoglobin, the RED pigment of BLOOD which ACTS as oxygen carrier is a co-ordination compound of iron.
Discussion
45.

Mention any two anomalous properties of nitrogen.

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Solution :(i) Nitrogen is gas at room TEMPERATURE.
(ii) Nitrogen is diatomic.
(iii) Nitrogen can FORM `p pi - p pi` multiple BONDS
(iv) Nitrogen cannot from `d pi - p pi` bonds
(v) Nitrogen does not form penta halides
(vi) Nitrogen trihalide are not STABLE.
Discussion
46.

Mention any three differences between lyophilic and lyophobic colloids.

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SOLUTION :
Discussion
47.

Write any three anamolous properties of nitrogen.

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Solution :(i) Nitrogen is GAS at room TEMPERATURE.
(ii) Nitrogen is diatomic.
(iii) Nitrogen can FORM `p PI - p pi` multiple bonds
(iv) Nitrogen cannot from `d pi - p pi` bonds
(v) Nitrogen does not form penta halides
(vi) Nitrogen trihalide are not stable.
Discussion
48.

Mention any one application of adsorption.

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Solution :i. GAS MASKS
II. Control of HUMIDITY.
Discussion
49.

Mention a drug which can act, both as an analgesic as well as an antipyretic. Name an artificial sweetening agent.

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SOLUTION :The drug which can ACT, both as an ANALGESIC as well as an antipyretic is aspirine. An artificial sweetening AGENT is saccharin.
Discussion
50.

Menionthe productsformedin the following i. Zine oxide is treatedwith excess of sodiumhydroxidesolution ii. Iodineis added to asolutionof stamous chloriude iii. Sulphurdioxide gas, watervapourand air arepassedoverheatedsodium chloride

Answer»

Solution :Sodiumzincate isformed
`ZnO + 2NaOH rarr Na_(2)ZnO_(2) + H_(2)O`
II . Stamouschloride is agood reducing AGENT itreduced iodine toiodidu.
`SnCI_(2) + 2HCI + I_(2) rarr SnCI_(4) + 2HI`
iii. Sodiumsulphate is formed
`SO_(2) + H_(2)O + (1)/(2) O_(2) + 2NaCI rarr Na_(2)SO_(4) + 2HCI`
Discussion