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.	Percentage composition in terms of mass of a solution obtaned by mixing 300g 25% solution of NH_(4)NO_(3) with 400g of 40% solution of solute 'X'
Answer» PRECENTAGE by MASS of SOLUTE `33.57%` Precentage by mass of solvent `66.43%` Percentage by mass of solute `16.43%` Percentageby mass of solvent `83.57%` ANSWER :A::B

2.	Percentage of A_1 in air is about
Answer» 0.01 0.02 0.03 0.04 Answer :A

3.	Percent purity of iron in cast iron is
Answer» 90 94 97 99 Answer :D

4.	Per two gram of charcoal, a gas is adsorbed by 0.1g and 0.2g at 10 torr and 80 torr pressure respectively. Calculate the n value in Freundlich adsorption isotherm.
Answer» Solution :`(x)/(m)=K.P^(1//n)(or) (X_(1))/(X_(2))=((P_(1))/(P_(2)))^(1//n)` SUBSTITUTING the values, `(0.1)/(0.2)=((10)/(80))^(1//n) (or)((1)/(2))^(1)=((1)/(2))^(3//n)` Therefore, the VALUE of n is 3.

5.	Per monomeric unit, how much is the increase in mass when cellulose is treated with AcOAc in excess ?
Answer» SOLUTION :N//A

6.	Peptic ulcer is heal by
Answer» streptomyin bithional MG(OH))_(3) boric acid ANSWER :C

7.	Peptization is a process of :
Answer» PRECIPITATING colloidal particles purifying colloidal particles DISPERSING the PRECIPITATE into colloidal state None of these ANSWER :C

8.	Peptization is a process
Answer» of PRECIPITATION of colloidal particles of PURIFICATION of colloids of dispersing precipitates into colloidal solutions in which colloidal particles moves in an ELECTRIC field. Answer :C

9.	Peptization involves
Answer» Precipitation of colloidal particles distintegation of colloidal aggragates EVAPORATION of DISPERSION MEDIUM impact of molecules of the dispersion medium on the colloidal particles Solution :Peptisation is disintegration of colloidal AGGREGATE.

10.	Peptization denotes
Answer» Digestion of FOOD HYDROLYSIS of proteins Breaking and dispersion into the colloidal state Precipitation of solid from colloidal dispersion ANSWER :C

11.	Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.
Answer» Solution :(i) Ions either positive or negative of peptizing agent (electrolyte) are adsorbed on the particles of precipitate. They repel and hit each other and break the particles of the precipitate into colloidal size. (ii) For EXAMPLE, when we add a small volume of very DILUTE hydrochloric ACID sotion peptisingagent to a fresh precipitate of a silver CHLORIDE, it leads to formation of silver chloride colloidal solution, `UNDERSET("(Precipitate)")(AgCl)overset(HCl)rarrunderset("(Colloid)")(AgCl)`

12.	Peptisation is not used to prepare
Answer» SILVER CHLORIDE sol ferric HYDROXIDE sol both (a) and (B) colloidal platinum Answer :D

13.	Peptisation is a method of preparation of sol. Write a general procedure for peptisation.
Answer» Answer :The PROCESS of converting a precipitate into colloidal state by shaking it with dispersion medium containing small amount of electrolyte is CALLED peptisation. For EXAMPLE, when ferric-chloride solution is added to ferric hydroxide precipitate, a reddish brown `Fe(OH)_3` sol is OBTAINED.

14.	Peptide linkage is present in
Answer» Carbohydrates. VITAMINS. Proteins. RUBBER. ANSWER :C

15.	Peptides are amino acid polymer in which the individual amino acid units are called
Answer» monomer residue epimer amide ANSWER :B

16.	Peptide linkage is
Answer» `-OVERSET(O)overset(\|\|)(C )-O-` `-overset(O)overset(\|\|)(C )-NH_2` `-overset(O)overset(\|\|)(C )-NH-NH_2` `-overset(O)overset(\|\|)( C)-NH-` ANSWER :D

17.	Peptide bond is a key feature in:
Answer» Polysaccharide Proteins Nucleotide Vitamins Answer :B

18.	Pepsin enzyme hydrolysis
Answer» Proteinsto AMINO ACIDS Fats to FATTY acids GLUCOSE to ETHYL alcohol Polysaccharides to monosaccharide Answer :A

19.	Pepperment can be extracted form plant sources by using solvents like :
Answer» `NH_3` `H_2O` `CH_3COOH` `C_2H_5OH` ANSWER :D

20.	Pentyl cyanide to 1-aminopentane
Answer» Solution :`CH_(3)-(CH_(2))_(3)-CH_(2)-Cnoverset(H_(2)O)rarr` `CH_(3)-(CH_(2))_(3)-CH_(2)-CONH_(2)overset(Br_(2)//KOH)rarr UNDERSET("(1 - pentanamine)")(CH_(3)-(CH_(2))_(3)-CH_(2)-NH_(2))`

21.	Pentoxides of all the elements of nitrogen family are _____ acidicthan their trioxides.
Answer» Less More Equally acidic Can't say Solution :Acidic DUE to highest oxidation state (+5) of the central atom, where acidic character decreases down the group, `N_2O_5` (strongest)>`P_2O_5gtAs_2O_5gtSb_2O_5gtBi_2O_5` (weakest), due to gradual DECREASE of ELECTRONEGATIVITY.

22.	Pentavalence in phosphorous is more stable when compared to that of nitrogen even though they belong to same group is due to
Answer» <P>reactivity of phosphorous inert nature of NITROGEN dissimilar electronic configuration larger size of phosphorus atom. Solution :Electronic configuration of nitrogen atom is `1s^(2)2s^(2)2p^(3)`. Only three unpaired ELECTRONS of p orbital take part in bonding so trivalence is STABLE in this case. Since there is no d orbital in second orbit pentavalence is not stable.Electronic configuration of phosphorus atom `1s^(2)2s^(2)2p^(6)3s^(2)2p^(3)3d^(0)`. It can use three unpaired electrons of 3p orbital to exhibit trivalence and also can use 3d orbital to exhibit pentavalency `[1s^(2)2s^(2)2p^(6)3s^(1)3p^(3)3d^(1)]`.

23.	Pentose sugar present in RNA is
Answer» `BETA`-D-ribose `ALPHA`-D-ribose `beta`-D-2-deoxyribose `alpha`-D-deoxyribose Answer :A

24.	Pentan-3-one is not obtained from
Answer» 2,2-dichloro PENTANE 3,3-dichloro pentane pentan-3-ol pent-2-yne SOLUTION :2,2- DICHLOROPENTANE gives pentan-2-one, not pentan-3-one as `CH_(3)CH_(2)CH_(2)underset(Cl)underset(\|)overset(Cl)overset(\|)C-CH_(3) overset("Hydrolysis")to CH_(3)CH_(2)CH_(2)underset(OH)underset(\|)overset(OH)overset(\|)C-CH_(3) underset(-H_(2)O)toCH_(3)CH_(2)CH_(2) underset("pentane-2-one")(underset(O)underset(\|\|)(C)-CH_(3))`

25.	Pentan-3-ol on reaction with aluminium tertiary butoxide in presence of acetone gives
Answer» pentane pentanoic acid pentanal pentan-3-one. Solution :

26.	Pentahalides of phosphorus are known, but not pentahydride. Why ?
Answer» Solution :Phophorus exhibits pentavalency in excited state. FLUORINE, chlorine or bromine is more ELECTRONEGATIVE and influences excitation to form `PX_(5)`. However, hydrogen is not that much electronegative to incluence the excitation in phosphorus. Hence `PH_(5)` is not FORMED

27.	Pentan -3- en-2-one is reduced by LiAlH_(4) gives
Answer» PENT -4- en-2-ol `pent -3-en-1-ol pent -2-ol pent-3-en-2-ol ANSWER :D

28.	Pentan - 2- one and 3- methyl butan - 2- one are
Answer» chain isomers POSITION isomers metamers TAUTOMERS Answer :C

29.	Pentlandite is an ore of
Answer» Co Cu Ni Fe Answer :C

30.	Pentalandite is an ore of:
Answer» Fe Ni ANSD Fe Cu Nitrate Answer :D

31.	Pentahalides of phosphorus are known, but not pentahydride. Why?
Answer» SOLUTION :Phosphorous exhibits PENTAVALENCY in excited state. Fluorine, CHLORINE or bromine is more ELECTRONEGATIVE and influences excitation to form `PX_(5)`. However, hydrogen is not that much electronegative to INFLUENCE the excitation in phosphorus. Hence `PH_(5)` is not formed.

32.	PentaeryI thrityI monosterate is an example of
Answer» ANIONIC detergent cationic detergent non-ionic detergent soap Answer :C

33.	Pentagonal bipyramidal structure contains bond angles approximately
Answer» 1. `120^(@), 90^(@), 180^(@)` 2 `120^(@), 72^(@), 180^(@)` 3. `72^(@), 90^(@), 120^(@)` 4. `72^(@), 90^(@), 180^(@)` Answer :D

34.	Pentaammine nitrocobalt(III) cation possesses the property of
Answer» physiorption verstile REDUCING agent chirality linkage isomerism SOLUTION :`[Co(NH_(3))_(5)NO_(2)]^(2+)`

35.	Penta hydroxy hexanone is ______.
Answer» an ALDO hexose a ketohexose an aldo pentose a KETOPENTOSE SOLUTION :a ketohexose

36.	Pent -3-ene - 1- nitrile on reduction by di-isobutyl aluminium hydride gives
Answer» ANSWER :B

37.	Penicillin was fist discovered by
Answer» A. FLEMING TENCE and salken S.A.Waksna Lewis Pasteur Answer :A

38.	Penicillin is which type of drug ?
Answer» Antifertility Antihistamine DISINFECTANTS ANTIMICROBIALS SOLUTION :Antimicrobials

39.	Penicillin is an example of
Answer» Analgesic Antiseptic Antibiotic Anaesthetic Answer :C

40.	Penicillin was first discovered by
Answer» A. FLEMING S.A. Waksna Tence and Salke Lewis PASTEUR Solution :A. Fleming discovered PENICILLIN in 1929.

41.	Penicillin is a :
Answer» Hormone Antibiotic Antipyretic Vitamin Answer :B

42.	Penicillin and ofloxacin are _______antibiotics
Answer» ANSWER :BACTERICIDAL

43.	Penicillin, ampicillin, cephalosorins, hydrogen peroxide, carbapenems
Answer» SOLUTION :HYDROGEN PEROXIDE. It is an ANTISEPTIC where as other are ANTIMICROBIALS.

44.	Penicillin has general molecular formula
Answer» `C_(9)H_(11) O_(4)SN_)(2)R` C_(10)H_(11) O_(4)SN_(2)` `C_(9)H_(11) O_(4)N_(2)R` `C_(9)H11 O_(4)S R` Answer :A

45.	Penicillin is
Answer» Analgesic Antipyretic ANTIMALARIALS ANTIBIOTIC SOLUTION :PENICILLIN is an ANTIBIOTICS. It is narrow spectrum antibiotic.

46.	pencillin was discovered by
Answer» ALEXANDER FLAMING Fischer Hoffamann Mendius Answer :A

47.	Peeling of ozone umbrella is due to
Answer» PAN freons `CO_2` `NO` ANSWER :B::D

48.	Pegarding the structure of SO_(2) and SeO_(2) which of the following is true-
Answer» The gaseous `SO_(2)` and `SeO_(2)` have same V - shaped molecule both in solid and GAS PHASE At ROOM temperature both `SO_(2)` and `SeO_(2)` are solids. In the solid phase the structure of `SO_(2)` is V - shaped discrete molecule but `SeO_(2)` is cyclic trimeric In solid phase the sturcture of `SO_(2)` is V - shaped discretemolecule but `SeO_(2)` has linear polymeric chain Answer :D

49.	Pencillin G contains
Answer» PHENYL group Benzyl group Benzo group Benzal group Answer :B

50.	Pearls, opals and Ruby red glass are belong the colloid named .............
Answer» SOLUTION :SOLID SOL