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 type of polymerization of alkyne and give note on each.

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Solution :A large number of alkyne molecules combine with each other and form giant molecule which is called as polymerization of alkyne.
There are mainly two types of alkyne polymerization : Linear polymerization and cyclic polymerization.
(a) Linear polymerization of alkyne : Under SUITABLE conditions linear polymerization of ethyne takes place ot produce polyacetylene or polyethyne which is a high molecular weight polyene containing repeating UNITS of `[CH=CH-CH=CH]` and can be represented as `(-CH=CH-CH=CH-)_(n)`. Under special conditions, this polymer conduts electricity. Thin film of polyacetylene can be used as electrodes in batteries. These films are good conductors, lighter and cheaper than the metal conductors.
(b) Cyclic polymerization : Ethyne on passing through red hot iron tube at 873 K undergoes cyclic polymerization. Three molecules POLYMERISE to form benzene which is the starting molecule for the preparation of derivative of bezene, dyes, DRUGS and large number of other organic compounds. This is the BEST route for entering from aliphatic to aromatic compounds as discussed below :
Discussion
2.

Give type of hydrogen bond in the following. Ice, water, liquid ammonia, O-nitrophenol, p-nitrophenol.

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SOLUTION :Inter MOLECULAR H bond : ICE, water, liquid ammonia, p-nitrophenol,
Inter rnolecular H bond : O-nitrophenol
Discussion
3.

Give type of organic reaction and its mechanism

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Solution :(i) SUBSTITUTION reactions (II) ADDITION reactions (iii) Elimination reactions (IV) Rearrangement reactions
Discussion
4.

Give two uses of quick lime.

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Solution :(i) It is an IMPORTANT primary material for MANUFACTURING cement and (ii) It is EMPLOYED in the purification of sugar and in the MANUFACTURE of dye stuffs.
Discussion
5.

Give two uses of Plaster of Paris.

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SOLUTION :(i) The LARGEST use of PLASTER of Paris is in the building industry as WELL as plasters (ii) in dentistry and for MAKING casts of statues and busts.
Discussion
6.

Give two uses of NaCl.

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Solution :(i) It is USED as a common SALT or table salt for DOMESTIC purpose and (ii) It is used for the PREPARATION of `Na_(2)O_(2), NaOH and Na_(2) CO_(3)`.
Discussion
7.

Give two uses of caustic soda.

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Solution :(i) In the purification of BAUXITE. (II) in the textile INDUSTRIES for mercerizing COTTON fabrics.
Discussion
8.

Give two uses of magnesium.

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Solution : Magnesium (powder and ribbon) is used in flash powders and bulbs, INCENDIARY BOMBS and signals. A suspension of magnesium hydroxide in WATER (CALLED MILK of magnesia) is used as antacid in medicine.
Discussion
9.

Give two uses of KOH.

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Solution :Potassium hydroxide is used in the MANUFACTURE of SOFT SOAP. It is also used as an EXCELLENT absorbent of CARBON dioxide.
Discussion
10.

Give two uses of carbon dioxide .

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Solution :(a ) Used as fire EXTINGUISHERS as it is a non supporter of combustion. (B) Solid `CO_(2)` ( DRY ICE) is used as a refrigerant.
Discussion
11.

Give two uses of Ca(OH)_(2).

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Solution :(i)It is used as a BUILDING MATERIAL in the form of marble and (II) in the manufacture of quick lime.
Discussion
12.

Give two uses of beryllium.

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Solution :(i) BERYLLIUM is USED in the MANUFACTURE of ALLOYS and (ii) Beryllium is used for making WINDOWS of X-rays tube.
Discussion
13.

Give two uses of calcium carbonate ?

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SOLUTION :Calcium carbonate is used in the manufacture of high quality PAPER. It is ALSO used as an ANTACID.
Discussion
14.

Give two uses of calcium carbonate.

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Solution :(a) used in manufacture of lime water. (b) used as BUILDING MATERIAL in FORM of marble.
Discussion
15.

Give two tests to distinguish between alkanes and alkenes.

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Solution :TEST with bromine water of `"CC"l_(4)`
Alkenes react with bromine water of `"CC"l_(4)` to form dibromo alkane, Where as ALKANES do not SHOW such reaction.
Test with alkaline . `KMnO_(4)` or Baeyer.s reagent test:
Alkenes react with Baeyer.s reagent to produce GLYCOL, Where as alkenes do not show such reaction.
Discussion
16.

Give two ores of magnesium.

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SOLUTION :Carnallite `(KCL . MgCl_(2) . 6 H_(2)O)` and magnesite `(MgCO_(3))`.
Discussion
17.

Give two examples of molecules undergoing sp^(3) d^(2) hybridisation and predict their shapes.

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Solution :Examples : `SF_(6), XeF_(4)`
Shapes :
`SF_(6)` - Octahedral
`XeF_(4)` - Square planar
Discussion
18.

Give two examples from everyday life where cathode ray tubes are used

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Solution :(i) Television picture TUBE (II) Fluorescent light TUBES
Discussion
19.

Give two examples for each of the following type of organic compounds. (i) Aromatic homocyclic compound (ii) Aromatic heterocyclic compound

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SOLUTION :(i) Aromatic homocyclic COMPOUND
(II) Aromatic heterocyclic compound
Discussion
20.

Give two examples for (1) gem dihalide (2) vicinal dihalide.

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Solution :(i) GEM dihalides:
(a) `CH_3-CHCl_2`1,1 - dechloroethane
(b) `CH_3- underset(CL)underset(|)OVERSET(CH_3)overset(|)C -Cl`1,2 - dichloroethane
(ii) Vicinal dihalides :
(a) `{:(CH_2-CH_2),(|""|),(Cl""Cl):}`1,2 - dichloroethane
(b) `CH_3 - underset(Br) underset(|)overset(CH_3)overset(|)C -CH_2Br`1,2 - dibromo-2-methylpropane
Discussion
21.

Give two example of equilibrium reactions where K_(p) gt K_(c).

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Solution :`K_(p)K_(c) . (RT)^(Delta n)b` . If `Delta n_(g) = +vec , K_(p) gt K_(p) gt K_(c)` EXAMPLES
`(i)2 NH_(3) (g) HARR N_(2)(g) + 3H_(2)(g) `
`Delta n_(g) = 4-2 =2, K_(P) = K_c(RT)^(2)`
(ii) `PCl_(5)(g) hArr PCl_(3)(g) +Cl_(2)(g)`
`Delta n_(g) =2 -1= 1 , K_(p) = K_(C) (RT)^(1)`
So ,`K_(p) gt K_(c)`
Discussion
22.

Give two difference between bonding molecular orbital and antibonding molecular orbital.

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SOLUTION :
Discussion
23.

Give two cations thatexhibity sp^(3) hybridisation.

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SOLUTION :The cations that undergo `sp^(3)` hybridisation are `H_(3)O^(+)` and `NH_(4)^(+)`.
Discussion
24.

Give total number of sigma and pi-bonds present in acetophenone.

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SOLUTION :
Discussion
25.

Give total number of isomers (except optical) of formula C_(3)C_(6)O.

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SOLUTION :
Discussion
26.

Give threee examples for solid vapour equilbrium.

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Solution :`I_(2)(s) HARR I_(2)(g)`
CAMPHOR (s) `hArr`Camphor (g)
`NH_(4)CL(s) hArr NH_(4)Cl(g)`
Discussion
27.

Give three uses each of the different allotropic forms of carbon.

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SOLUTION :
Discussion
28.

Give three points of difference between inductive effect and resonance effect.

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Solution :The MAIN POINTS of difference between INDUCTIVE and resonance effects are GIVEN below :
Discussion
29.

Give three points of difference between inductive effect and resonance effect

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SOLUTION :
Discussion
30.

Give three examples in which the principles green chemistry has been applied.

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Solution :(In dry-cleaning, USE of liquefied co, in PLACE of non- ENVIRONMENT friendly tetrachloroethene
`(Cl_2C="CC"l_(2))`
(ii) Use of `H_(2)O_(2)` in BLEACHING in place of chlorine.
(iii) In the manufacture of chemicals like ethanal by using environment-triendly chemicals and conditions
Discussion
31.

Give three examples in which green chemistry has been applied.

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Solution :(i)In dry cleaning, use of liquefied `CO_2` in place of tetrachloroethene `(Cl_2C =C Cl_2)`.
(ii) In BLEACHING of paper using `H_2O_2` in place of chlorine.
(III)In the MANUFACTURE of chemicals LIKE ethanal using environment-friendly chemicals and conditions
Discussion
32.

Given this set of quantum numbers for a multi electron atom 2, 0, 0, and -1//2. The next higher allowed set of n and 1 for this atom in its ground state

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n=2, l=0
n=2, l=1
n=3, l=0
n=3, l=1

Answer :B
Discussion
33.

Give the value of the quantum numbers for the electron with the highest energy in sodium atom

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SOLUTION :ELECTRON CONFIGURATION of `._(11)Na = 1s^(2) 2s^(2) 2p^(6) 3s^(-1)`. The electron with highest ENERGY is `3s^(1)` for which n = 3, l = 0
Discussion
34.

Givethe value of ionic product of pure water at 298 K.

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ANSWER :`K_(w)=1XX10^(-14)` at 298 K
Discussion
35.

Give the uses of hydrocarbon with examples.

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Solution :Fuel used in our daily LIFE : LPG, CNG, LNG and kerosene ETC. are mixed hydrocarbons.
* Hydrocarbons are also used for the manufacture of polymers like polyethene, polypropene, polystyrene etc.
* Higher hydrocarbons are used as solvents for paints. Higher hydrocarbons like turpentine kerosene etc. are used in paints.
* They are also used as the starting materials for manufacture of many dyes and drugs.
* "Thus hydrocarbons COMPOUNDS are much impotant in our routine life".
Discussion
36.

Mention the uses of heavy water .

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Solution :(i) Heavy water is USED as moderator in nuclear reactors as it can lower the energies of fast moving NEUTRONS.
(ii) `D_2O` is COMMONLY used as an tracer to study organic reaction mechanisms and mechanisms of metabolic REACTIONS.
(iii) It is also used as a coolant in nuclear reactors as it absorbs the heali GENERATED.
Discussion
37.

Give the uses of gypsum.

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Solution :The Alabaster variety of gypsum was used by the sculptors.
(ii) Gypsum is used in making drywalls or plaster boards.
(III) Gypsum is used in the production of Plaster of Paris, which is use
(iv) Gypsum is used in making surgical and orthopedic CASTS.
(v) It plays an important role in agriculture as a soil ADDITIVE, conditione
(vi) Gypsum is used in toothpaste, SHAMPOO and hair products.
(vii) Calcium sulphate acts as a coagulator in making tofu.
(viii) It is also used in baking as a dough conditioner
(ix) Gypsum is a component of Portland cement, where it acts as a hardening retar the speed at which concrete sets.
(x) Gypsum is used to give colour to cosmetics and DRUGS.
(xi) Gypsum plays a very important role in wine making
Discussion
38.

Give the uses of alkali metal elements (group-I).

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Solution :Lithium metal is used to make useful alloys, for example with lead to make .white metal. bearings for motor engines,
Aluminium to make aircraft parts, and with magnesium to make armour plates. It is used in thermonuclear reactions.
Lithium is ALSO used to make electrochemical cells.
Sodium is used to make a Na/Pb alloy needed to make `PbEt_(4)` and `PbMe_(4)`. These organolead compounds were earlier used as anti-knock additives to petrol, but nowadays vehicles use lead-free petrol.
Liquid sodium metal is used as a coolant in fast BREEDER nuclear reactors.
Potassium has a vital role in biological systems. Potassium chloride is used as a fertilizer. Potassium hydroxide is used in the manufacture of soft soap. It is also used as an excellent absorbent of carbon dioxide.
Caesium is used in devising photoelectric cells.
[`PbEt_(4) toPb (C_(2)H_(5))_(4)`: Tetra ethyl lead (TEL)]
[`PbMe_(4) to Pb (CH_(3))_(4)` : Tetra methyl lead (TML)]
Discussion
39.

Give the use of hydrated zeolites.

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SOLUTION :HYDRATED zeolites are used as ion EXCHANGERS in softening of "HARD" water.
Discussion
40.

Give the use of dimond.

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Solution :It is used as an abrasive for sharpening HARD tools, in MAKING DYES and in the manufacture of tungsten filaments for electric light bulbs.
Discussion
41.

Give the unit of volume in SI system.

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`"(meter)"^(3)`
`"(CM)"^(3)`
`"(inch)"^(3)`
`"(dm)"^(3)`

SOLUTION :Volume `= "LENGTH" XX "BREADTH" xx "height"`
`= "meter" xx "meter" xx "meter"`
`= "(meter)"^(3)`
Discussion
42.

Give the types of the carbocylic compounds.

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SOLUTION :ALICYCLIC and AROMATIC
Discussion
43.

Give the types of reactions that alkene gives. Write the name of reaction.

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SOLUTION :
Discussion
44.

Give the two names of herbicides.

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SOLUTION :NAME of the herbicides: (i) Sodium chlorate `(NaCl O_3)` (II) Sodium arsinite `(Na_3 ASO_3)`
Discussion
45.

Give the two examples for each of the following type of organic compounds.(a) Aromatic heterocyclic (b)Non-benzenoid aromatic

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Solution :a. Aromatic HETEROCYCLIC:
(i) Pyridine (II) FURAN
b. Non-benzenoid aromatic :
(i) AZULENE (ii) Anulenes
Discussion
46.

Give the total schore of the correct statements of thefollowing.

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ANSWER :STATEMENT (a),(B) and (d) are correct , so total SCORE is 4+2+1=7
Discussion
47.

Give the technique to separation of the following (i) Mixture of sugar and sand (ii) Mixture of kerosine and water (iii) Mixture of benzene and simple salt. (iv) Mixture of 356K and 365K b.p. contenting liquid. (v) Mixture of aniline and camphor

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Solution :(i) To make solution in water then filter and concentrate the fillfrate and sugar is separate out by crystallisation on UPPER layer.
(II) The kerosine is separate out in separatory funnel of distillion method.
(iii) Benzene is separate out by DISTILLATION
(iv) Factional distillation.
(v) (a) Sublimation or (B) Steam distillation
Discussion
48.

Give the test for halogen

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Solution :The sodium FUSION EXTRACT is ACIDIFIED with nitric acid and then treated with SILVER NITRATE, the precipitate, soluble is more ammonium hydroxide
Discussion
49.

Give the systematic names for the following: (i) milk of magnesia(ii) lye (iii) lime (iv)caustic potash (v) washing soda (vi) soda ash and(v) trona

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Solution :(i) Milk of magnesia - `""Mg(OH)_2 "" - ` MAGNESIUM hydroxide
(ii) LYE `""-NAOH ""`- Sodium hydroxide
Discussion
50.

Give the structures of the following aromatic compounds: (i) p-Toluidine (ii) p-cresol (iii) T.N.T. (iv) Benzophenone.

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SOLUTION :
Discussion