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 one example each of solutions showing positive and negative deviation from Raoult,s law, with reason.
Answer» Lower Higher Same Can not be said Answer :B

2.	Bile juice aids in the digestion and absorption of fats because it contains:
Answer» BILE pigment Lipase Cholesterol Bile salts Answer :D

3.	Bidentate ligand is :
Answer» `CH^-` ETHYLENE diamine EDTA `SCN^-` ANSWER :B

4.	Bicyclo (1, 1, 0) butane is
Answer» SOLUTION :

5.	BiCl_3 on hydrolysis form a white ppt of
Answer» Bismuth acid Bismuth OXYCHLORIDE Bismuth pentachloride Bismuth hydride Solution :`BiCl_(3)+H_(2)Orarrunderset("oxychloride - white ppt")underset("Bismuth")(BIOCL)+2HCl`

6.	BiCl_(3) is more stable than BiCl_(5). Why ?
Answer» Solution :BI has little tendency to form pentahalides because +5 oxidation state of Bi is much less STABLE than +3 oxidation state due to INERT PAIR effect.

7.	BHT, BHA, SO_2 , Vitamin E, sorbitol.
Answer» SOLUTION : Sorbitol. It is a SUGAR SUBSTITUENT where as OTHERS are antioxidants.

8.	BHT as antioxidant.
Answer» Solution :BHT REDUCES rancidity of oil. (2) It is USED to preserve colour, odour and taste of foodstuff. (3) It is used in chewing GUM, cereals and OILS.

9.	B.H.C. is used as a pesticide in agriculture under the trade name :
Answer» GAMMEXANE D.D.T. Phosgene WESTRON ANSWER :A

10.	Bhopal gas tragedy was caused by
Answer» Methylamine METHYLISOCYANATE Phosgene CHLOROFORM ANSWER :B

11.	Bharath went to his grandfather’s house in winter this year. As usual he went for fishing. His grandmother told him there will be no fishes in the lake. He noticed that it was more difficult to find fishes in winter. The fishes were deep inside the river. Whereas in summer they were on the surface and hence he was able to catch fishes. (a) Why are fishes on the surface in water than in the depth in summer?Srisha wanted to keep ice creams without melting. So he had to keep it on ice taken in a container. His grandmother advised him to pour salt on the ice.(a)Why?(b) What value can be derived from this?
Answer» Solution :According to Henry’s law at low temperature gases are more soluble and hence as more oxygengets dissolved in WATER fishes survive better even in DEPTH of the river. In summer as the oxygenis less in water the fishes come to the surface. (B)The value that I DERIVE from this is WISDOM is superior to knowledge

12.	BHA as antioxidant.
Answer» Solution :BHA is used to preserve COLOUR, and taste of FOODSTUFF. (2) It is used in consmetics, pharmaceutical, animal feed and in BUTTER to increases its STORAGE life from months to years.

13.	BHAis
Answer» buthlated p-hydroxy anisole butylated p-hydroxy aniline buthlated p-hydroxy acetylene buthlated p-hyroxy acetaldehyde Answer :A

14.	BHA and BHT are most familiar example of
Answer» HYPNOTICS antipyretics antioxidant antibiotics ANSWER :C

15.	BF_4 acts as acid according to :
Answer» Arrhenius Bronsted Lewis None Answer :C

16.	BF_3 is used as a catalyst in various organic reactions because
Answer» it is a STRONG reducing agent it is highly reactive compound it is a WEAK LEWIS acid it is a strong Lewis acid ANSWER :D

17.	BF_(3) is used as a catalyst in several industrial processes due to its
Answer» Strong reducing agent Weak reducing agent Strong Lewis acid NATURE Weak Lewis acid character SOLUTION :`BF_(3)` is acidic because due to Lewis concept it accept a lone PAIR of ELECTRON.

18.	BF_3 is termed as an acid though it does not contain H^+ ions. Explain .
Answer» Solution :According to Lewis CONCEPT of ACID and BASES, any SPECIES capable of accepting an electron PAIR is an acid. `BF_3` is electron deficient so accepts a pair of electron , Hence, termed as acid.

19.	BF_3 is an acid according to :
Answer» ARRHENIUS concept Henderson's concept Lewis concept Bronsted-Lowry concept Answer :C

20.	BF_3 is an example of Lewis acid because it behaves as :
Answer» Electrophile Nucleophile Free radical Lyophilic Answer :A

21.	Beznyl iodide is obtained from benzyl brimide by sing
Answer» HI in ether HI in DRY acetone NaI inether NaI in dry ether Answer :D

22.	Between two isotherms we have a cycle as shown. Find the work done by the gas during the cycle in (J). [Take: T_(1) = 127^(@)C, T_(2) = 16^(@)C, n = 1 mole]
Answer» ANSWER :75

23.	Between sodiumhydrogencarbonate and magnesium hydroxide which is a better antacid and why ?
Answer» SOLUTION :Magnesium hydroxide `[Mg(OH)_(2)]` is a batter antacid because beinginsoluble it does not allow the pH to increase neturaility. On the other han, sodium hydrogen carbonate being soluable and its excess amount can make the stomach ALKALINE and trigger the PRODUCTION of even more acid.

24.	Between sodium hydrogencarbonate and magnesium hydroxide which is a better antacid and why?
Answer» Solution :MAGNESIUM HYDROXIDE `[Mg(OH)_(2)]` is a better antacid because being insoluble it does not allow the pH to increase above NEUTRALITY. On the other hand, SODIUM hydrogen carbonate being soluble and its excess amount can make the stomach alkaline and TRIGGER the production of even more acid.

25.	Between sodium hydrogen carbonate and magnesium hydroxide which is a better antacid and why?
Answer» Solution :Magnesium HYDROXIDE is a BETTER antacid because being insoluble it does not allow the pH to INCREASE above neutrality. On the other hand, sodium HYDROGEN carbonate being soluble, its EXCESS can make the stomach alkaline and trigger the production of even more acid

26.	Between sea water and pure water, which boils at a higher temperature ?
Answer» SOLUTION :SEA WATER

27.	Between sea water and drinking water which will freeze at lower temperature?
Answer» SOLUTION :SEA WATER

28.	Between phenol and alcohol which is more acidic ? Why ?
Answer» Solution :Phenol is more acidic than ALCOHOL. Reason: PHENOXIDE ion is resonancestablised whereas alkoxide is not RESONANCE stablished.

29.	Between NH_3 and PH_3 which one is more basic ?
Answer» SOLUTION :`NH_3` is more basic than `PH_3`, DUE to greater ELECTRON DENSITY on SMALLER N-atom of `NH_3`.

30.	Between N and O, which one has higher ionisation potential ?
Answer» Solution :N-atom `(N^7 = 1s^2 2s^2 2p_x ^1 2p_y ^1 2p_z ^1)` has HIGHER ionisation potential DUE to its half-filled stable ELECTRONIC configuration as compared to O-atom.

31.	Between N_2O_3 and N_2O_5, which oxide is more acidic ?
Answer» SOLUTION :`N_2O_5` is more ACIDIC, DUE to higher oxidation number (+5) of N-atom in `N_2O_5` as compared to +3 O.N. in `N_2O_3`

32.	Between ionic and covalent bonds, there are large majority of bonds, in which the bonding electrons are shared unequally between two atoms but are not completely transferred.Such bonds are said to be polar covalent bonds and the bond polarity is due to difference in electronegativity, the ability of an atom in a molecule to attract the shared electrons in a covalent bond. The measure of net polarity is a quantity called the dipole moment, mu , which is defined as the magnitude of the charge Q at either end of the molecular dipole times the distancer between the charges : mu=Qxxr.Molecular polarities give rise to some of the forces that occur between molecules and these forces are of several different types including dipole-dipole forces, London dispersion forces, and hydrogen bonds. All these intermolecular forces are electrical in origin and result from the mutual attraction of unlike charges or the mutual repulsion of like charges. In which of the following mixtures, the London dispersion force acts as a major intermolecular force of attraction ?
Answer» SODIUM chloride and water Cyclohexane and carbontetrachloride Water and ethyl alcohol Benzene and acetone Solution :Cyclohexane `(C_6H_2)` and carbontetrachloride `(C Cl_4)` both are non-polar COMPOUNDS so there exist LONDON dispersion force between the constituent MOLECULES.

33.	Between ionic and covalent bonds, there are large majority of bonds, in which the bonding electrons are shared unequally between two atoms but are not completely transferred.Such bonds are said to be polar covalent bonds and the bond polarity is due to difference in electronegativity, the ability of an atom in a molecule to attract the shared electrons in a covalent bond. The measure of net polarity is a quantity called the dipole moment, mu , which is defined as the magnitude of the charge Q at either end of the molecular dipole times the distancer between the charges : mu=Qxxr.Molecular polarities give rise to some of the forces that occur between molecules and these forces are of several different types including dipole-dipole forces, London dispersion forces, and hydrogen bonds. All these intermolecular forces are electrical in origin and result from the mutual attraction of unlike charges or the mutual repulsion of like charges. Which of the following statement is true ?
Answer» The dipole MOMENT of `NF_3` is more than `NH_3` trans-2,3-dichloro-2-pentene does not have NET PERMANENT dipole moment Carbon tetrachloride has no net dipole moment because of its regular TETRAHEDRAL structure Dipole moment is ZERO for sulphurdioxide molecule. Solution :

34.	Between ionic and covalent bonds, there are large majority of bonds, in which the bonding electrons are shared unequally between two atoms but are not completely transferred.Such bonds are said to be polar covalent bonds and the bond polarity is due to difference in electronegativity, the ability of an atom in a molecule to attract the shared electrons in a covalent bond. The measure of net polarity is a quantity called the dipole moment, mu , which is defined as the magnitude of the charge Q at either end of the molecular dipole times the distancer between the charges : mu=Qxxr.Molecular polarities give rise to some of the forces that occur between molecules and these forces are of several different types including dipole-dipole forces, London dispersion forces, and hydrogen bonds. All these intermolecular forces are electrical in origin and result from the mutual attraction of unlike charges or the mutual repulsion of like charges. Which of the following statements is incorrect ?
Answer» Out of trimethylamine and trimethylphsophine , trimethylamine has higher dipole moment Out of `(SiH_3)_2O` and `(CH_3)_2O, (SIH_3)_2O` is more basic The critical temperature of WATER is higher than that of `O_2` because the `H_2O`molecule has dipole moment Intermolecular hydrogen bonding increases the enthalpy of vaporization of a liquid due to the increase in the attraction between molecules . Solution :(A)NITROGEN is more electronegative then phosphorus. So,dipole moment of trimethylamine is greater than trimethy phosphine. (B) In trisilyl ether the lone pair of electron on oxygen ATOM is less easily available for donation because of `ppi-dpi` delocalisation due to presence of the vacant d-orbital with Si.This however is not possible with carbon in `CH_3-O-CH_3` due to the absence of d-orbital making it more basic. ( C)The critical temperature DEPENDS on the magnitude (of strength) of intermolecular force of attraction between the molecules.If a molecules has dipole moment it means there is dipole attraction between the molecules and thus it will effect the critical temperature. (D)Hydrogen bond acts as a bridge between atoms which holds one atom by covalent bond and the order by hydrogen bond and this increase in the attraction between molecules.

35.	Between Eu and Ce which one exhibits +2 oxidation state ?
Answer» SOLUTION :Eu or MANGANESE DIOXIDE (`MnO_(2)`)

36.	Between HF, HCl,has the highest ionic character because
Answer» F has the highest ELECTRON affinity In HF, electronegativity DIFFERENCE is highest `F^(-)` ion has the highest value of ionic radius Atomic orbitals of H and F have almost SIMILAR energy Answer :B

37.	Between Cu_((aq))^(2+) and Cu_((aq))^(+) which is more stable?
Answer» SOLUTION :`CU^(2+)(AQ)`

38.	Between chlorobenzene and chloroethane, which is more reactive towards nucleophilic substitution reaction?
Answer» SOLUTION :Chloroethane, is more REACTIVE towards nucleophilic SUBSTITUTION REACTION.

39.	Between CH_(3) COOH " and " H - COOH, the HCOOH will be
Answer» LESS ACIDIC more acidic equally acidic NON - acidic ANSWER :B

40.	Between CH_3COOH and HCOOH, HCOOH will be
Answer» LESS ACIDIC Equally acidic More acidic None Answer :C

41.	Between Caso_4 and Ca_3 (PO_4)_2 which one is require in maximum Concentration to Coagulate positive sol.
Answer» SOLUTION :`CaSO_4`

42.	Between ammonia and aniline, which is more basic ?
Answer» SOLUTION :AMMONIA

43.	Among alcohols and phenols which one is more acidic?
Answer» SOLUTION :PHENOL The phenoxide ION formed by the DISSOCIATION of phenol is stabilized by resonance.

44.	Between acids K_(a) is more for
Answer» bothequal cannot be predicted Answer :A

45.	Between 2M glucose solution and 1M glucose solution which one has a lower freezing point ?
Answer» SOLUTION :2M GLUCOSE.

46.	Between 2 M glucose solution and 1 M glucose, which one has a lower freezing point?
Answer» Solution :HIGHER the concentration, greater is the depression and HENCE LOWER is the freezing point. Thus, 2 M glucose solution will have lower freezing point.

47.	Between 0.1 M KCl and 0.1 M NaCl, 0.1 M KCl is least conductor, because. . . .
Answer» SIZE of `NA^(+)` is smaller than `K^(+)`. Size of `Na^(+)` is BIGGER than `K^(+)`. Ionization of NACL is more than KCl. None of above. Solution :Size of `Na^(+)` is smaller than `K^(+)`.

48.	between 0 and 1 in all cases
Answer» between 2 and 4 in all cases 1 in CASE of physical adsorption 1 in case of CHEMISORPTION Solution :Freundlich adsorption isotherm is `x/m =kp ^(1//n)` WHEREN is `GT 1` so that (1/n) lies between 0 and 1.

49.	Bethe and Van vleck proposed a coordination theory named as …………..
Answer» WERNER's theory Valence BOND theory Molecular ORBITAL theory Crystal FIELD theory Answer :A::C::D

50.	Bethe and Van proposed a coordination theory named as ……….. .
Answer» Werner's THEORY VALENCE BOND theory MOLECULAR orbital theory Crystal FIELD theory Answer :D