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.	Pickles have a long shelf life and do not get spoiled for months, why ?
Answer» Solution :PLENTY of salt and cover of oil act as preservatives. These do not allow moisture and air to ENTER the material and hence BACTERIA cannot THRIVE on them. Therefore, pickles do not get spoiled for months TOGETHER.

2.	Pick up true statement about the complex compound with formula [Co(NH_3)_3Cl_3]
Answer» IUPAC name is triamminecobalt (III) chloride The complex can EXHIBIT fac and MER isomerism The complex can show optical isomerism The hybrid state of COBALT is `dsp^3` ANSWER :B

3.	Pickles and jams have a long shelf life and do not get spoilt for a long time. Explain.
Answer» Solution :Pickles are treated with excess of salt or oil and jams are treated with excess of sugar. These substances do not allow BACTERIA to survive. Hence pickles and jams remain SAFE.

4.	Pick up to correct statement .
Answer» Boiling POINTS of ALKLY halides are greater than those of the corresponding alkanes. In water , the soluubility decreases as `CH_(3)OH gt C_(2)H_(5)OH gt C_(6)H_(5)OH` Aniline is a weaker base than ammonia. All of the these Answer :D

5.	Pick up the incorrect statement .
Answer» ASBESTOS and willemite are silicate minerals Anglesite and barytes are SULPHATE minerals Sylvine and fluorspar are halide minerals Calamine and ZINCITE are the minerals of calcium Solution :Calamine is `ZnCO_(3)` and zincite is `ZnO`. Both are minerals of zinc.

6.	Pick up the false statement
Answer» `NH_(3)` is more BASIC than DIPHENYL amine A base with a higher value of `pK_(b)` is a stronger base Pseudo nitrol gives blue colour with `NaOH` A base with a lower `pK_(b)` is a stronger base. Solution :A base with lower `pK_(b)` but higher `K_(b)` is relatively stronger.

7.	Pick up the correct statements from the following
Answer» both aldehydes and ketones use `sp^(2)` - hybrid carbon atoms for their addition reaction acetic ACID neither reacts with FEHLING's solution nor with Tollen's reagent CHLORAL is ALDEHYDE all are correct Answer :D

8.	Pick up the correct statements about alkyl halides.
Answer» They are associated with each other by `H-` BONDS. Theydissolve in WATER quickly. They DISSOLVE easily in ORGANIC solvents. They do not contain any POLAR bonds in theirmolecules. Solution :NA

9.	Pick up the correct statement(s) :
Answer» All MINERALS are ores All minerals cannot be an ore All ores are minerals The minerals from which metals can be EXTRACTED profitably are CALLED ores Answer :B::C::D

10.	Pick up the correct statement/s.
Answer» All MINERALS are ores. A mineral cannot be an ore. All ores are minerals. The minerals from which METALS can be EXTRACTED PROFITABLY are called ores. Answer :C::D

11.	Pick up the correct statement from the following:
Answer» SECONDARY alcohols are oxidised to KETONES in which the number of carbon ATOMS REMAINS unchanged. TEL is a GOOD antiknock compound Both aldehydes and ketones use `sp^2`- hybrid carbon atoms for their formation. All are correct.

12.	Pick up the correct statement:(a) The crystal of AgBr does not have Schottky defect (b) The crystal system having crystal parameters, a = b != c, alpha= beta= 90^(@), gamma= 120^(@)is for a hexagonal unit cell (c) Ionic compounds having Frenkel defect,generally show a low radius ratio value. (d) The coordination number of Na^(+) ion in NaCl is 4
Answer» (a), (B) (b), (C) (c), (d) (a), (c) ANSWER :B

13.	Pick up the correct statement about alkyl halides
Answer» They are associated with each other by H-bonds They DISSOLVE in water QUICKLY They dissolve easily in ORGANIC solvents They do not contain any POLAR bond in their molecules. Answer :C

14.	Pick up the correct statement about alkyl halides:
Answer» They show H bonding They are soluble in water They are soluble in ORGANIC solvents They do not contain any POLAR bond Answer :C

15.	Pick up the correct statement.
Answer» CO which is a major POLLUTANT resulting from the combustion of fuels in automobiles plays a major role in photochemical smog. CLASSICAL smog has an oxidising character while the photochemical smog is REDUCING in character. Photochemical smog occurs in day time where as the classical smog occurs in the MORNING hours. During FORMATION of smog the level of ozone in the atmosphere goes down. Solution :Photochemical smog occurs in day time where as the classical smog occurs in the morning hours.

16.	Pick up the correctstatement
Answer» BOILING points of alkly halides are greater than those of the corresponding alkanes. In water , the soluubility decreases as `CH_(3)OH gt C_(2)H_(5)OH gt C_(6)H_(5)OH` Aniline is a weaker base than ammonia. All of the these ANSWER :D

17.	Pick up the correct stament :
Answer» The BOLING points of ALKLY HALIDES are more than those of the corresponding alkances . In water , the solulity of ` CH_3OH gt C_2H_5OH gt C-6H_5OH`. `C_6H_5NH_2` is a weaker BASE thann ` NH_3`. All the above statements are correct . Solution :All statements are correct and self EXPLANATORY .

18.	Pick up the correct order of acidity of the following. (I) Phenol (II) P-Cresol (III) m-Nitrophenol (IV) P-Nitrophenol
Answer» `IV GT III gt I gt II` `II gt IV gt I gt III` `I gt II gt IV gt III` `III gt II gt I gt IV` SOLUTION :`IV gt III gt I gt II`

19.	Pick up the correct order of reactivity of the following compounds in SN^(1)reactions.
Answer» ANSWER :A

20.	Pick up the azeotropic mixture from the following.
Answer» 90% ethanol + 10% WATER 5% ethanol + 95% water 95% ethanol + 5% water 85% ethanol + 5% water Solution :95% ethanol + 5% water

21.	Pick the vitamin among the following acids ?
Answer» ASCORBIC ACID Acetic acid Cinnamic acid Aspartic acid SOLUTION :Ascorbic acid

22.	Pick the wrong statement from the following
Answer» Deficiency of Vitamin `B_6` (pyridoxime) results in convulsions Sources of Vitamin are yeast, MILK, GREEN vegetables and cereals Deficiency of vitamin D causes xerophtha- LAMIA CONSUMPTION of citrus fruits and green leafy vegetables in FOOD prevents scurvy Answer :C

23.	Pick the wrong statement from the following:
Answer» Consumption of CITRUS fruits and green leafy VEGETABLES in food PREVENTS scurvy Deficiency of VITAMIN `B_(6)` (pyridoxine) results in convulsions. Sources of vitamin `B_(1)` are yeast, milk, green vegetables and cereals Deficiency of vitamin D causes XEROPHTHALMIA Solution :Deficiency of vitamin A causes xerophthalmia and deficiency of vitamin D causes rickets

24.	Pick the wrong one among the following
Answer» `F_(2)`- YELLOW<BR>`Br_(2)` - RED `Cl_(2)`- Colourless `I_(2)`- Violet Answer :B::C

25.	Pick the INCORRECT statement among those given below :
Answer» MULTIPLE covalent bonds are SHORTER than single set of atoms. Bond strength varies inversely with bond length. Bond order of ISOELECTRONIC spectes will be same. Bond enthalpy increases with increasing bond length. Answer :D

26.	Pick the odd man out
Answer» CO `CN^(-)` ` CL^(-)` `NH_3` ANSWER :C

27.	Pick the correct use of Quinol.
Answer» As a filler As a PLASTICIZER As an ANTIOXIDENT As a catalyst Solution :As an antioxident

28.	Pick the correct statement among the following:
Answer» Sodium dodecyl benzene sulphonate used in tooth paste is a cationic DETERGENT Non-ionic detergents is formed when polyetheylene GLYCOL REACTS with adipic acid Cetyl trimethyl AMMONIUM BROMIDE is a popular cationic detergent used in hair conditioner Sodium lauryl sulphate forms an insoluble scum with hard water Answer :C

29.	Pick the correct statement
Answer» Sodium dodecylbenzene sulphonate used in toothpaste is a cationic detergent Sodium lauryl SULPHATE forms an INSOLUBLE scum with HARD water. Cetyltrimethyl ammonium bromide is a POPULAR cationic detergent used in hair conditioner. Non-ionic detergents are formed when POLYETHYLENE glycol reacts with adipic acid. Solution :Sodium dodecylbenzene sulphonate is an anionic detergent. Cationic detergents (cetyltrimethylammonium bromide) possess excellent germicidal properties and are used in hair conditoners. Non-ionic detergents are obtained by the reactions between polyethylene glycol and stearic acid,

30.	Pick the correct group of the following having decending order of its acidity.
Answer» <P>m-NITROPHENOL `GT` p-nitrophenol `gt` o - nitrophenol o- nitrophenol `gt` m-nitrophenol `gt` p- nitrophenol p- nitrophenol `gt` m-nitrophenol `gt` o- nitrophenol p- nitrophenol `gt` o-nitrophenol `gt` m- nitrophenol Solution :p- nitrophenol `gt` o-nitrophenol `gt` m- nitrophenol

31.	Pick the appropriate choice about collision theory of reaction rates
Answer» It explains the effect of TEMPERATURE on rate of reaction It assumes that the reactants must be in correct orientation to react It says rate depends UPON the FREQUENCY at which reactants collide The collision having energy higher thanthe THRESHOLD value GIVE successful reaction Answer :d

32.	Pick the appropriate choice about collision theory of reaction rates. I) It explains the effect of temperature onrate of reaction II) It assumes that the reactants must be in correct orientation to react. III) It says rate depends upon the frequency at which reactants collide. IV) The collisions having energy heigher than the threshold value will give successful reactions. The correct points are
Answer» I, II, III and IV II and IV I and IV I, III and IV ANSWER :A

33.	Pick out the wrong statements(s) (i) Vapour pressure of a liquid is the measure of the strength of intermolecular attractive forces. (i) Surface tension of a liquid acts perpendicular to the surface of the liquid. (iii) Vapour pressure of all liquids is same at their freezing points. (iv) Liquids with stronger intermolecular attractive forces are more viscous than those with weaker intermolecular force.
Answer» II,iii and iv ii and iii I,ii and iii iii only Solution :VAPOUR PRESSURE of all liquids are different at their freezing POINTS.

34.	Pick out wrong combination
Answer» `Fe^(+2) to `HAEMOGLOBIN `MG^(2+) to ` PHOTOSYNTHESIS `Se^(2+) to `Kreb cycle `Co^(+2) to `vitamin B-1,2 Answer :C

35.	Pick out the wrong statement(s) 1.Vapour pressure of a liquid is the measure of the strength of intermolecular attractive forces 2. Surface tension of a liquid acts perpendicular to the surface of the liquid 3. Vapour pressure of all liquids is same at their freezing points 4. Liquids with stronger intermolecular attractive forces aremore visscous than those with weaker intermolecular forces
Answer» 2,3 and 4 2 and 3 1, 2 and 3 3 only Answer :D

36.	Pick out the wrong statement with respect to aldol condensation ________.
Answer» It is an REVERSIBLE change Characteristic of compounds having `alpha`-hydrogen `BETA`-HYDROXY aldehyde or ketones are formed Aldol and ketols READILY lose water FORM unsaturated compounds Answer :A

37.	Pick out the wrong statement among the following.
Answer» Consumption of liver OIL, carrot, papaya etc prev.ents night blindness Vitamin `B_(12)` is cobalamin Deficiency of vitamin E CAUSES SCURVY Vitamin K is RESPONSIBLE for blood clotting Solution :Deficiency of vitamin E causes scurvy

38.	Pick out the wrong statement regarding ethers.
Answer» DIMETHYL ether and DIETHYL ethers are simple ethers ethyl METHYL ether is a SYMMETRICAL ether the REACTION between sodium ethoxide and methyl bromide is known as williamson's ether synthesis. Diethyl ether is used as an anaesthetiz Answer :B

39.	Pick out the wrong statement regarding amino acids.
Answer» They are derived from proteins They are BIFUNCTIONAL All AMINO ACIDS are OPTICAL isomers They exist as zwitter ions Solution :All amino acids are optical isomers

40.	Pick out the wrong statement regarding physical adsorption.
Answer» It is reversible It DEPENDS on the nature of the gas It is due to Vanderwall's force HEAT of ADSORPTION is large Answer :D

41.	Pick out the wrong statement.
Answer» Standard FREE energy of formation of all elements is zero A process ACCOMPANIED by decrease in entropy is spontaneous under certain conditions The entropy of a perfectly crystalline SUBSTANCE at absolute zero is zero A process that LEADS to increase in free energy will be spontaneous Answer :D

42.	Pick out the unsaturated fatty acid from the following
Answer» Tearic ACID Lauric acid OLEIC acid Keratin Solution :EXCEPT oleic acid stearic acid, lauric acid and Palmitic acid are saturated fatty acid. Oleic acid is unsaturated fatty acid.

43.	Pick out the three dimensional silicates?
Answer» TALK Mica Quartz Asbestos Answer :C

44.	Pick out the unsaturated fatty acid from the following:
Answer» STEARIC ACID lauric acid oleic acid PALMITIC acid. SOLUTION :Oleicacid `CH_(3)(CH_(2))_(7)CH =CH(CH_(2))_(7)COOH` is an unsaturated FATTY acid.

45.	Pick out the statement which is not relevant in the discussion of colloids
Answer» Sodium ALUMINIUM silicate is used in the softening of hard WATER Potash alum is used in shaving and as a antiseptic in medicine Artificial rain is caused by throwing electrified sand on the clouds from an aeroplane Deltas are formed at a PLACE where the river pours its water into the sea Solution :Softening of hard water by use of sodium aluminium silicate involve ion EXCHANGE.

46.	Pick out the stronger reducing agent among the following oxyacids of phosphorus
Answer» HYPOPHOSPHOROUS ACID Phosphorous acid Hypophosphoric acid Pyrophosphorous acid ANSWER :A

47.	Pick out the statement which is not true ?
Answer» Tetrazine is harmful edible colour Alitame is an artificial SWEETNER BHT is an antioxidant SODIUM alkyl sulphate is a CATIONIC detergent Answer :D

48.	Pick out the statement which is not relevant as regards to colloids:
Answer» Sodium aluminium silicate is used in the softening of hard water Potash alum is used in SHAVING and as antiseptic in medicine Artificial RAIN is caused by THROWING AGI on CLOUDS from an aeroplane Smog is formed when smoke and fog mix with each other Answer :A

49.	Pick out the reaction in which formic and acetic acids differs from each other.
Answer» Sodium REPLACES hydrogen from the compound. Forms esters with alcohols Reduces solution of AMMONIACAL SILVER nitrate or fehling's solution or dil.acid `KMnO_4` Turns red LITMUS blue Answer :C

50.	Pick out the reaction in which formic and acetic acid differs from each other.
Answer» Sodium replaces HYDROGEN from the compound. Form ESTERS with alcohol Reduces solution of ammoniacal silver nitrate or fehling's solution or acidified `KMnO_4` solution Turns RED LITMUS blue Answer :C