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.	Increased concentration of CO_(2) in atmosphere
Answer» Greenhouse EFFECT Acid RAIN Lackof photosynthesis DEATHOF AQUATIC LIFE Answer :A

2.	Increased asthmatic attacks in certain seasons are related to :-
Answer» INHALATION of SEASONAL pollen Eating of seasonal vegetables Lower temperature Wet and DRY environment Answer :A

3.	Increased asthmatic attacks in certain seasons are related to :
Answer» INHALATION of SEASONAL pollen eating of seasonal vegetables low temperature wet and DRY environment Answer :A

4.	Increase of temperature will increase the reaction rate due to
Answer» INCREASE of NUMBER of EFFECTIVE collisions increase of mean FREE path increase of number of molecules increase of number of collisions Answer :A

5.	Increase in the concentration of the reactants leads to the changes in
Answer» heat of reaction ACTIVATION ENERGY collision frequency threshold energy SOLUTION :Greater the concentration, greater is the collision frequency.

6.	Increase in temperature favour the forward reaction in
Answer» `2SO_(2)(G) + O_(2)(g) rarr 2SO_(3)(g)` `2O_(3)(g) rarr 3O_(2)(g)` `C("graphite") rarr C ("DIAMOND")` `H_(2)(g) + ( 1)/( 2) O_(2) ( g) rarr H_(2)O(g)` Answer :C

7.	Increase in the concentration of the reactants leads to the change in
Answer» HEAT or reaction Activation energy Collision FREQUENCY THRESHOLD energy Answer :C

8.	Increase in surface are of reactant leads to more collisions per litre per second and hence the rate of the reaction.........
Answer» SOLUTION :INCREASED

9.	Increase in pressure in ionic solids may decrease co-ordination No.
Answer» If both STATEMENT- I and Statement- II are TRUE, and Statement - II is the CORRECTEXPLANATION of Statement– I. If both Statement - I and Statement - II are true but Statement - II is not thecorrect explanation of Statement – I. If Statement - I is true but Statement - II is false. If Statement - I is false but Statement - II is true. Answer :A

10.	Increase in equivalent conductivity of strong electrolyte increase on dilution is due to . . . . Reasons.
Answer» Increase in KINETIC of ionic moveemtn of ions 100% ionization of electyrolyte OCCUR at usual dilution. Both INCREASES. E.g., increase in numbers and kinetics of ions. Increase in numbers of ions. Solution :Ionization increases with STRONG ELECTROLYTE with dilution. So, equivalent conductivity of solution increases with kinetics of ions of ionic solution.

11.	Increase in boiling point is solution ……… prepared by dissolving 13.44 gm CuCl_(2) in 1 kg of water. (K_(b)=0.52" kg mol"^(-1) and molecular mass of CuCl_(2)=134.4 gm/mole)
Answer» `0.05` `0.1` `0.16` `0.92` SOLUTION :`DELTA T_(B)=iK_(b).m` `=3xx0.52xx(13.44)/(134.4)=0.16`

12.	Increase in atomic size down the group is due to
Answer» INCREASE in NUMBER of electrons Increase in number of protons and neutrons Increase in number of protons Increase in number of protons, neutrons and electrons Solution :Increase in atomic SIZE down the GROUP is due to increase in number of electrons.

13.	Incorrect statements is/are exothermic in nature
Answer» Adsorption is ALWAYS exothermic in nature `CaCl_(2)"cause more coagulation of GOLD sol than" AlCl_(3)` SURFACE tension of associated colloidsincrease with increase in CONCENTRATION With increase in concentration, molar conductance of strong ELECTROLYTE decrease repidly than associated colloids Answer :B::C::D

14.	Incorrect statements in the following
Answer» Unimolecular REACTIONS are always 1ST order Order does not change with pressure and temperature In case of free radical COMBINATION, order is qual to molecularity In 1st order reactions rate decreases with increase of time Solution :If press conc changes then order change insome CASES `r=(K_(1)[NH_(3)])/(1+K_(2)[NH_(3)])` If `Tuarr` then `Kuarr,ruarr` but n=no change

15.	Incorrect statements among the following (A) Sucrose is reducing sugar (B) Two alpha- D- glucose units in maltose are linked by 1,4-linkage (C ) beta - D glucose and beta- D fructose units are linked by 1, 4-linkage in lactose (D) All polysaccharides are reducing nonsugars
Answer» Only A, B A, B, C, D A, C, D only A, B, C only ANSWER :C

16.	Incorrect statement with respect to physical properties of carboxylic acids is
Answer» CARBOXYLIC acids have higher boiling point than alcohols of comparable molecular masses Most carboxylic acids exist as dimer in the vapour phase Solubility of carboxylic acids in water INCREASES with increasing number of carbon atoms Carboxylic acids are also soluble in LESS polar organic solvents like BENZENE, ether, chloroform etc. Answer :C

17.	Incorrect statement with reference to Ce (Z=58)
Answer» `CE^(4+)` is a reducing agent. Ce in +3 oxidation STATE is more stable than in +4. Atomic SIZE of Ce is more than that of LU. Ce shows common oxidation states of +3 and +4. Solution :(a) : `Ce^(4+)` is an oxidising agent.

18.	Incorrect Statement (S) :
Answer» ALUMINIUM is used to produce die-castings. Gold nanoparticles used as an catalysts Copper is the FIRST METAL used by the HUMAN Brass is an alloy of zinc and copper Answer :A

19.	Incorrect statement regarding Williamson ether synthesis is
Answer» less HINDERED halide is USED in this reaction. less hindered alkoxide ION is used in this reaction. mechanism of reaction will be `Sp^(2)`. more hindered halide is used in this reaction. Answer :D

20.	Incorrect statement regarding the structure of dichromate is
Answer» It has TWO kinds of BOND lengths Cr-O-Cr Bond ANGLE is `126^@` Answer :D

21.	Incorrect statement reagarding interstial hydrides is
Answer» They SHOW METALLIC CONDUCTION They are harder than PURE metal They have high mp than pure metal They are denser than pure metal Answer :D

22.	Incorrect statement of interstitial compounds formed by d-block elements is
Answer» They are chemically inert They SHOW metallic conductivity They are hard & some borides have HARDNESS SIMILAR to diamond Their MELTING points are lower than those of pure metals Answer :D

23.	which two groups are present ins-block :-
Answer»

24.	Incorrect statement for radius of 3d series metal/ions:
Answer» Metallic radius of Mn is HIGHER than that of Cr and FE `I_(E_(II)` of Mn is greater then `C_(V)` Fe, Co, Ni have almost same ATOMIC radius Irregular TREND of atomic radius on moving from SC to Zn Answer :B

25.	Incorrect statement for H_(2)SO_(4) is
Answer» High volatile Strong acidic character Dehydrating agent Oxidising agent Solution :`H_(2)SO_(4)` LESS volatile DUE to PRESENCE of Hbonding

26.	Incorrect statement among the following is I) LiAlH_(4) can reduce an amide into amine without change in the nimber of carbon atoms. II) A primary amide can be reduced to a primary amine by Br_(2)//KOH with same number of carbon atoms. III) A primary amide can bereduced to a primary amine byLiAlH_(4) with (n - 1) carbon atoms . IV) Hoffmann's bromamide reaction is useful to prepare aniline from benzamide .
Answer» II only I only III only IV II and III Answer :D

27.	Incorrect statement is :
Answer» `NaHCO_(3) and KHCO_(3)` have same crystal structure On heating `LiNO_(3)` decomposes into `Li_(2)O an NO_(2)` AMONG ALKALI metals, Li metal impart RED colour flame `Li_(2)SO_(4)` does not FORM alum Solution :Li metal imparts carmine red colour flame due to emission spectrum.

28.	Incorrect statement among the following
Answer» n-propylchloride and isopropyl CHLORIDE are position isomers n-butyl chloride and ISO butyl chloride are CHAIN isomers SEC butyl chloride and ter-butyl chloride are chain isomers ISOBUTYL chloride and ter-butyl chloride are chain isomers Answer :D

29.	Incorrect statement about the plot is/are:
Answer» `T_(1) and T_(2)` are melting POINT and BOILING point of Mg repectively. `T_(1) and T_(2)` are melting point and boiling point of MgO repectively. Reducing of MgO by COKE is possibe above `T_(3)`. Mg can be extracted from GASEOUS products by rapid cooling. Answer :B

30.	Incorrect statement about the manufacture of steel from pig iron is
Answer» The quality of steel manufactured in OPEN hearth process is very high The COMPOSITION of steel can be controlled in Bessemer process Iron ore, scrap iron and LOW GRADE pig iron can not be used in Bessemer process Loss of iron due to slag formation is minimised in open hearth process Answer :2

31.	Incorrect statement about 'R' is
Answer» Antichlor AGENT Fixing agent in photography Forms ppt. with `CaCl_(2)` solution Reduces `CU^(2+)(aq)` cation Solution :

32.	Incorrect statement about PHBV is
Answer» it is co-polymer of 3- hydroxybutanoic acid and 3 - hydroxypentanoic acid it has ester LINKAGE EXCESS of hydroxy pentanoic acid makes the polymer more tougher it undergoes degradation by BACTERIA Answer :C

33.	Incorrect statement about nucleophilic substitution reaction is
Answer» Reactivity of halides towards `SN^(1) ` MECHANISM is ` 3^(@) gt 2^(@) gt 1^(@) ` alkyl halides POLAR SOLVENTS favour `SN^(1) ` reactions Reactivity of halides towards `SN^(2) `mechanishm is `1^(@) gt 2^(@) gt 3^(@) ` alkyl halide Low concentration of nucleophile favours `SN^(2) ` mechanism ANSWER :D

34.	Incorrect statement about manufacture of H_(2)SO_(4) by contact process is
Answer» HOMOGENEOUS catalysis Adsorption theory 720K and 2 bar PRESSURE high TEMPERATURE and LOW pressure are favoured Answer :C

35.	Incorrect statement about given carbohydrate is :
Answer» Given compound is a reducing sugar Given compound undergo mutarotation Given compoundis a non-reducing sugar Given compound has a GLYCOSIDIC linkage Solution : Due to this it be REDUCINGSUGAR. `:'` The ring can OPEN into alsendic FORM and it can undergo mutarotation.

36.	Incorrect statement about dichromate ion is
Answer» It has six SHORTER and two longer bonds Bond length of chromium-bridge OXYGEN is longer than chromium-terminal oxygen Bond ANGLE `OCrO gt CrOCr` Two tetrahedrals are JOINED at a corner Answer :C

37.	Incorrect statement about carbon monoxide is :-
Answer» It is highly soluble in water It BURNS in OXYGEN to produce considerabe amount of heat it is toxic having bond order = 3 it is found in COAL GAS, water gas and produces gas Answer :A

38.	Incorrect statament about manufacture of H_2SO_4 by contact process is
Answer» Homogeneous cataysis ADSORPTION theory 720 K and 2 BAR PRESSURE high temperature and LOW pressure are favoured Answer :C

39.	Incorrect statement
Answer» POLYNUCLEAR metal carbonyls are homonuclear Polynuclear metal carbonyls are hetronuclear Metal carbonyls CONTAIN carbonyls ligand Non-bridged metal carbonyls contains TERMINAL carbonyl. Answer :C

40.	Incorrect relation is
Answer» for isothermal reversible change `W=-P_(EXT)(V_f-V_i)` for isothermal reversible change `Q=2.303nRtlogV_f/V_i` for isothermal reversible change `W=-2.303nRTlogP_f/P_i` for ADIABATIC change `DeltaU=W` ANSWER :C

41.	incorrect order of lonic size is :-
Answer» `La^(+3)gt Gd^(+3)gt Eu^(+3)gtLu^(+3)` `Cegt Prgt Sm gt LU` `K^(+) lt Sc^(+3)gt V^(+5) gt Mn^(+7)` `Ti^(+4)l lt Zr^(+4) ~~HF^(+4)` Answer :A

42.	Incorrect orders of bond angle is :
Answer» `Ocl_(2)gtSF_(2)gtAsH_(2)gtH_(2)Se` `NH_(3)gtPF_(3)gtPH_(3)gtH_(2)S` `XeO_(4)gtClO_(4)^(-)gtSO_(4)^(-)gtCF_(4)` `N(SiH_(3))_(3)GTO(SiH_(3))_(2)gtOMe_(2)` Solution : `angleOXeO=109^(@)28', angleOClO=109^(@)28', angleOSO=109^(@)28', angleFCF=109^(@)28'` `implies` orderof bond ANGLE `O(SiH_(3))_(2)gtN(SiH_(3))_(2)gtOMe_(2)`.

43.	Incorrect order of radius is :-
Answer» `Sr^(+2) LT Rb^(+) lt BR^(-) lt SE^(-2)` `Ni gt Cu gt Zn` `Co gt Co^(+2) gt Co^(+3) gt Co^(+4)` `Ba^(+2) lt Cs^(+) lt Se^(-2) lt As^(-3)` ANSWER :B

44.	Incorrect order of radius is:
Answer» `Sr^(2+) lt Rb^(+) lt Br^(-) lt Se^(2-)` `NB^(5+) lt Zr^(4+) lt Y^(3+)` `Co GT Co^(2+) gt Co^(3+) gt Co^(4+)` `Ba^(2+) gt Cs^(+) gt Se^(2-) gt As^(3-)` ANSWER :D

45.	Incorrect order of IP is :-
Answer» `CU^(+2) gt Zn^(+)` `Cu LT Zn` `TL lt AL` `Pd gt Ag` Answer :C

46.	Incorrect order of bond angle is :
Answer» `{:(CF_4, C Cl_4, CBr_4),(ALPHA, beta , gamma ):}` `angleXCX` angle ` alpha gt beta gt gamma ` (X-halogen ATOM ) `NCl_3 gt PCl_3 gt AaCl_3 ` `angleClMCl` bond angle (M= central atom ) `angle FSO gt angle FSF ` bond angle `NO^(2+) gt NO_2 gt NO_2^(-)` ` angle ONO ` bond angle SOLUTION :Bond angle ` alpha = beta= gamma ` (3) In `OSF_2` angle ` O-S-F gt ` Angle F-S-F

47.	Incorrect order of bond angle is :-
Answer» `NH_(3) GT PH_(3) gt AsH_(3)` `H_(2)O gt H_(2)S gt H_(2)Se` `BCl_(3) gt AlCl_(3) gt GaCl_(3)` `NO_(2)^(+) gt NO_(2) gt NO_(2)^(-)` Answer :C

48.	Incorrect order of ionic size is:
Answer» `La^(3+) gt GD^(3+) gt EU^(3+) gt Lu^(3+)` `V^(2+) gt V^(3+) gt V^(4+) gt V^(5+)` `Tl^(+) gt In^(+) gt Sn^(2+) gt Sb^(3+)` `K^(+) gt Sc^(3+) gt V^(5+) gt Mn^(7+)` Solution :Correct order: `La^(3+) gt Gd^(3+) gt Eu^(3+) gt Lu^(3+)`.

49.	Incorrect option (s) about NaCl structure is/are
Answer» 4 CORNERS are shared 12 edges are shared 6 corners and 2 edges are shared 3 edges and 3 faces are shared Answer :A::C::D

50.	Incorrect name of an alkyne is:
Answer» Propyne But-2-yne Pent-3-yne But-1-yne Answer :D