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.	An example of a sigma bonded organometallic compound is:
Answer» GRIGNARD's reagent Ferrocene Cobaltcene Ruthenocene Answer :A

2.	An example of a sigma bonded organometallic compound is -
Answer» Ruthenocene Grignard's reagent Ferrocene Cobaltocene Answer :B

3.	An example of a sigma bonded organometallic compounds is
Answer» Cobaltocene Ruthenocene Grignard's reagent Ferrocene Answer :C

4.	An example of a salt that will not hydrolyze is
Answer» `CH_(3)COONH_(4)` `CH_(3)COOK` `NH_(4)Cl` `KC l` Solution :KCL is a salt of strong acid (HCl) and strong base (KOH). It DISSOCIATES completely on dissolution in water. `H_(2)O` is a weak electrolyte and it dissociates to a small EXTENT. `{:(KClhArrK^(+)+Cl^(-)),(underline(H_(2)OhArrH^(+)+OH^(-))),(KCl+H_(2)OhArr(K^(+)+Cl^(-))+H_(2)O):}` Thus concentrations of `H^(+) and OH^(-)` IONS remain equal. i.e. such salts form neutral solutions and do not hydrolyse.

5.	An example of a sigma bonded organometallic compound is
Answer» ruthenocene Grignard's reagent FERROCENE cobaltocene Solution :Grignard's reagent, R-MG-X is formed through a normal 2 electron covalent bond (`sigma` bond) between R GROUP and Mg atom.

6.	An example of a reversible reaction is
Answer» `Pb(NO_(3))_(2)(aq)+2NA(aq)=PnI_(2)(s)+2NaNO_(3)(aq)` `AgNO_(3)(aq)+HCl(aq)=Ag(CL(s0+NaNO_(3)(aq)` `2Na(s)+H_(2)O(1)=2NaOH(aq)+H_(2)(g)` `KNO_(3)+(aq)+NaCl(aq)=KCl(aq)+NaNO_(3)(aq)` Solution :As all the reactants and products are present in aqueous from in (d) so it is REVERSIBLE reaction. In other either solid or gas is generated which is INSOLUBLE or valatile and hance makes the reaction unidirectional.

7.	An example of a psychedelic agent is
Answer» DNA LSD DDT TNT Answer :B

8.	An example of a protein which acts as structural material is :
Answer» haemoglobin Keratin erepsin oxytocin. ANSWER :B

9.	An example of a non-stoichiometric oxide when heated is
Answer» `BeO` `ZNO` `MgO` `CAO` Solution :At high temperature, metal excess non-stoichiometric DEFECT is SHOWN by ZnO, because it loses OXYGEN on heating.

10.	An example of a natural biopolymer is :
Answer» TEFLON RUBBER NYLON - 66 DNA Answer :D

11.	An example of a non-stoichiometric compound is :
Answer» `Al_2O_3` `Fe_3O_4` NiO PbO Answer :B

12.	An example of a molecule which is chiral but does not contain chiral carbon atom is :
Answer» `CH_(3)CH(OH)COOH` meso-tartaric acid 2, 3-Pentadiene `(CH_(3))_(2)CHCH(CL)CH_(3)` ANSWER :C

13.	An example of a molecule having two lone pairs and three bond pairs is :
Answer» 1. `XeF_(2)` 2. `SF_(4)` 3. `H_(3)O^(+)` 4. `ClF_(3)` ANSWER :D

14.	An example of a major air pollutant is :
Answer» Oxygen Carbon dioxide Carbon monoxide Helium Answer :C

15.	An example of a lipid is
Answer» Lard Keratin Glutathione Oxytocin Solution :Lard is an example of LIPID. It is TRIESTER of fattyacid and oil. Its is CONSTITUENTS of plants & TISSUES.

16.	An example of a Lewis acid is
Answer» Aluminium chloride Ammonia Pyriding AMINES SOLUTION :The CENTRAL atoms (Al) in `AlCl_(3)` has incomplete octet. Hence, it acts as LEWIS acid.

17.	An example of a ferromagnetic oxide is :
Answer» `CrO_(2)` `TiO_(2)` `Fe_(3)O_(4)` `Mn_(2)O_(7)` ANSWER :A

18.	An example of a fatty acid obtained from a .cooking oil is
Answer» acetic ACID STEARIC acid benzoic acid OXALIC acid SOLUTION :stearic acid

19.	An example of a disaccharide made up of two units of the same monosaccharides is
Answer» sucrose maltose LACTOSE none of these Solution :MALTOS `OVERSET("Hydrolysis")UNDERSET("Maltase")to` glucose+glucose

20.	An example of a disaccharide made up of two units of the same monosaccharides is :
Answer» SUCROSE MALTOSE Lactose Starch . Answer :B

21.	An example of a covalent crystalline solid is
Answer» Si NaF Ar Al Solution : SILICON is a COVALENT CRYSTALLINE SOLID.

22.	An example of a condensation polymer is
Answer» PVC Terylene Polypropylene Teflon Solution :In condensation POLYMERIZATION , a series of conddensation reactions between the (GENERALLY TWO) monomers contaning at least two functional groups each occur with the LOSS of a small molecule suchas `H_2O,CH_3OH or HX` (X=halogen ) . Terylene is a condensation polymer of ethylene GLYCOL and dimethyalterphthalte.

23.	An example of a condensationhomopolymer is
Answer» BAKELITE Melamine- FORMALDEHYDE resin ALKYL resin PERLON or NYLON -6 Answer :D

24.	An example of a compound with the functional group '-O-' is
Answer» ACETIC acid Methyl alcohol Diethyl ether Acetone Answer :C

25.	An example of a compound with the functional group -O- is
Answer» ACETIC acid methyl alcohol diethyl ether acetone Answer :C

26.	An example of a compound with functional group- O-is :
Answer» ACETIC acid Methyl alcohol Diethyl ETHER Acetone Answer :C

27.	An example of a bent molecule having bond angle greater than tetrahedral angle is :
Answer» `H_(2)O` `H_(3)O^(+)` `NO_(2)^(-)` `NO_(2)^(+)` ANSWER :C

28.	An example of a body centred cube is :
Answer» Sodium Magnesium Zinc Copper Answer :A

29.	An example of a antiaromatic species is
Answer» ANSWER :D

30.	An example for second order reaction is
Answer» `NO+1/2O_(2)toNO_(2)` `Cl_(2)OtoCl_(2)+1/2O_(2)` `2NO_(2)O_(5)to2N_(2)O_(4)+O_(2)` `2H_(2)O_(2)to2H_(2)O+O_(2)` Solution :`Cl_(2)OtoCl_(2)+1/2O_(2)`

31.	An example for metallic conductor and semiconductor is
Answer» `TIO` `FeO` `V_(2)O_(3)` `NIO` Answer :C

32.	An example for indigestible (in humans) linear polysaccharide is ?
Answer» CELLULOSE GLYCOGEN AMYLOPECTION AMYLOSE ANSWER :A

33.	An example for cationic detergent is
Answer» NALS CTAB TRIMETHYL phosphate All Answer :B

34.	An example for autocatalysis is
Answer» oxidation of NO to `NO_(2)` oxidation of `SO_(2)` to `SO_(3)` decomposition of `KClO_(3)` to KCl and `O_(2)` oxidation of oxalic ACID by ACIDIFIED `KMnO_(4)` Solution :`2KMnO_(4)+5H_(2)C_(2)O_(4)+3H_(2)SO_(4)rarr K_(2)SO_(4)+2MnSO_(4)+8H_(2)+10CO_(2)` The pink colour of `KMnO_(4)` disappears slowly on TREATING it with oxalic acid, but therate of disappearance of colour factens after SOMETIME due to the formation of `Mn^(2+)` ions which acts as autocatalyst for the REACTION.

35.	An example for amino acid hormone is ?
Answer» INSULIN TESTOSTERONE Thyroxine PROGESTERONE Answer :C

36.	An example for a strong electrolyte is
Answer» Urea Ammonium hydroxide Sugar Sodium acetate Solution :`CH_(3)COONa hArr CH_(3)COO^(-) + Na^(+)` `H_(2)O hArr H^(+) + OH^(-)` `CH_(3)COOH + NaOH`.

37.	An example for a saturated fatty acid , present in nature is
Answer» Oleic acid Linoleic acid Linolenic acid Palmitic acid Solution :Oleic acid `-C_(17)H_(23)COOH`, linoleic acid -`C_(17)H_(31)COOH`, linoleic acid -`C_(17)H_(29)COOH` , palmitic acid-`C_(15)H_(31)COOH`. Saturated monocarboxylic ACIDS form a HOMOLOGOUS series which has a general FORMULA `C_(n)H_(2n+1)COOH` or `C_(n)+H_(2n)O_(2)`. only palmitic acid follows this.

38.	An example for a saturated fatty acid, present in nature is
Answer» OLEIC acid linoleic acid LINOLENIC acid palmitic acid Solution :Oleic acid - `C_(17)H_(33)COOH` linoleic acid -`C_(17)H_(31)COOH`, linolenic acid - `C_(17) H_(29)COOH`, palmitic acid - `C_(15)H_(31) COOH` Saturated monocarboxylic ACIDS form a homologous series which has a general formula `C_(n)H_(2n+1)COOH`or `C_(n)H_(2n)O_(2)`. Only palmitic acid follows this

39.	An example for a double salt is
Answer» potassium ferricyanide cobalt hexamine chloride cuprous sulphate Mohr's salt Solution :Mohr.s salt is a double salt when dissolved in WATER it dissociates into its contituent ions. i.e. the individual components retain their IDENTITY. `FeSO_(4)(NH_(4))_(2)SO_(4)6H_(2)OtoFe^(2+)` (AQUEOUS)`+2NH_(4)^(+)(aq)+2SO_(4)^(--)(aq)+6H_(2)O`

40.	An example for a neutral buffer is :
Answer» 1. ammonium hydroxide and ammonium chloride 2. acetic ACID and sodium acetate 3. acetic acid and ammonium hydroxide 4. citric acid and sodium citrate. Answer :C

41.	An example for 1:1 electrolyte is
Answer» `H_(2)SO_(4)` `Na_(2)SO_(4)` NaCl `Al_(2)(SO_(4))_(3)` Answer :C

42.	An ethereal solution of an alkyl halide preferably the bromide of iodide, is treated with sodium 2R-X+2Na overset("Ether")toR-R+2NaX 2CH_(3)-Br+2Na overset("Ether")toCH_(3)-CH_(3)+2NaBr CH_(3)CH_(2)Br+2Na+CH_(3)Br overset("Ether")toCH_(3)CH_(2)-CH_(3)+2NaBr In this reaction, the producthas new (C-C) bond with the same type of alkyl halide, the product has symmetery and this helps in deciding the nature of reacting halide. Intermediates are free radicals CH_(3)CH_(2)CH_(2)CH_(3) underset("hv controlled")overset(Cl_(2))to overset("Na//ether")to Major product of the above reaction is
Answer» `CH_(3)(CH_(2))_(6)CH_(3)` `CH_(3)-CH_(2)-UNDERSET(CH_(3))underset(\|)(CH)-underset(CH_(3))underset(\|)(CH)CH_(2)CH_(3)` `CH_(3)-underset(CH_(3))underset(\|)(CH)-CH_(2)CH_(2)underset(CH_(3))underset(\|)(CH)CH_(3)` None of these Solution :INTERMEDIATE is `CH_(3)CH_(2)CH_(2)CH_(3)`

43.	An evacuated glass vessel weighs 50g when empty, 148.0 g when filled with a liquid of density0.98gml^(-1) and 50.5g when filled with an ideal gas at 760mm Hg at 300K . The molar mass of the ideal gas is ( Given R = 0.0821 L atm K^(-1) mol^(-1) )
Answer» 61.575 130.98 123.75 87.943 Solution :Mass of liquid `= 144 - 58 = 94g ` Density of liquid `= 0.47 g mL ^(-1)` Volume of glass vessel `= ( " Mass")/( " Density")` `= ( 94)/( 0.47) = 200ML` Pressure of gas, p = 760 mm Hg = 1 ATM Temperature, T = 300K Mass of gas in vessel = 50.5 - 50.0 = 0.5 g pV = nRT or pV = `( m )/( M ) RT ` or `M = ( m RT)/( pV) = ( 0.5 XX 0.082 xx 300)/( 1 xx 0.2)` `= 61.575g mol^(-1)`

44.	An ethereal solution of an alkyl halide preferably the bromide of iodide, is treated with sodium 2R-X+2Na overset("Ether")toR-R+2NaX 2CH_(3)-Br+2Na overset("Ether")toCH_(3)-CH_(3)+2NaBr CH_(3)CH_(2)Br+2Na+CH_(3)Br overset("Ether")toCH_(3)CH_(2)-CH_(3)+2NaBr In this reaction, the producthas new (C-C) bond with the same type of alkyl halide, the product has symmetery and this helps in deciding the nature of reacting halide. Intermediates are free radicals CH_(3)CH_(2)Br undergoes Wurtz reactions. We may expect some of the following products as
Answer» only a a and b a,b,c a and c Solution :Intermediate is `CH_(3)CH_(2)` which may combine to FORM `CH_(3)CH_(2)CH_(2)CH_(3)` (MAIN) and also `CH_(2)=CH_2) and CH_(3)CH_(3)` by disproportionation`

45.	An ether solution of PhCH_(3) (I), PhNH_(2) (II) and PhOH (III) is extracted with squeous NAOH. The ether layer will contain which compound(s) after the extraction ?
Answer» only III `I + II` `II + III` `I + III` Solution :Both `OhCH_(3)` (I) and `PhNH_(2)` (II) are INSOLUBLE in WATER and remain in the ether LAYER after EXTRACTION. `PHOH` (III) being water soluble passes into the aqueous later.

46.	An etheris obtained when phenol reacts with ___________.
Answer» `(CH_3)_3C Cl//HF` ACETICANHYDRIDE /`CH_3COONa` NAOH and `C_2H_5I` `C_2H_5COCl//AlCl_3` ANSWER :C

47.	An ether is not cleaved by HI even at 525K. The compound is
Answer» `C_6H_5OCH_3` `C_6H_5OC_6H_5` `C_6H_5OC_3H_7` THF. SOLUTION :NA

48.	An ether is more volatile than an alcohol having the same molecular formula. This is due to ……………………. .
Answer» dipolar character of ETHERS alcohols having RESONANCE structures inter MOLECULAR hydrogen bonding in ethers inter molecular hydrogen bonding in alcohols Solution :inter molecular hydrogen bonding in alcohols

49.	An ether is more volatile than alcohol having the same molecular formula. This is due to
Answer» INTERMOLECULAR HYDROGEN BONDING in alcohols dipolar CHARACTER of ethers alcohols having RESONANCE structures intermolecular hydrogen bonding in ethers. Answer :A

50.	An ether is
Answer» R-O-R' RCOR RCHO RCOOR Answer :A