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.	Smelting is usually carried out in
Answer» BLASTFURNACE Openhearthfurnce Mufflefurnace Electric furnace Answer :A

2.	Smelting is termed to the proces in which
Answer» The ORE is heated in the ABSENCE of AIR Ore is COLD The ore is heated in THEPRESENCE of air Ore is melted Answer :D

3.	Smelting is the process of reduction of metal oxide by :
Answer» C Al H CO Answer :A

4.	Smelting is the reduction of oxide to metal by :
Answer» C Al H ELECTRIC current Answer :A

5.	Smelting is done in:
Answer» BLAST furnace Muffle furnace Open HEART furnace Electric furnace Answer :A

6.	Smeltinginvolvesreductionof metal oxide with
Answer» CARBON CARBONDIOXIDE MAGNESIUM ALUMINIUM ANSWER :A

7.	Smelting.
Answer» SOLUTION :The process of EXTRACTION of a METAL from its ore by HEATING and melting at high temperature is called smelting.

8.	Smelting involves reduction of metal oxide with
Answer» ALUMINIUM CARBON MONOXIDE Carbon Magnesium ANSWER :C

9.	Smelling salt is:
Answer» `(NH_4)_2SO_4` `(NH_4)_3PO_4` `NH_4Cl` `(NH_4)_2CO_3` ANSWER :C

10.	Smallest among these spicies is
Answer» lithium lithium ion hydrogen HELIUM Solution :Lithium, lithium ion, hydrogen, helium. Hydrogen is smallest AMONG the SPECIES.

11.	Smell of H_2O_2 resembles:
Answer» Alcohol Alkali Nitric acid Chloroform Answer :C

12.	Small spherical ball of silver metal used in jewellery having diameter 0.1 cm, which is obtained by the electrolytic deposition.It total number of balls in jewellery is 10,000, then calculate the applied amount of electricity in coulombs, which is used on the deposition on electrodes having entire surface 0.12 m^2.[Density of Ag = 10.5] It is assumed that 3.5% electricity consumed as wastage during electrolysis and 60% of electrode body immersed in electrolyte.[Give your answer in multiple of 10^4]
Answer» Solution :Radius of ball =`0.1/2=0.05` Surface area of electrodes =`0.12 m^2=1200 cm^2` Weight of jewellery =`4/3 pir^3xx10,000xx"DENSITY"=4/3xx3.14xx(0.05)^3xx10000xx10.5=54.9` GRAM Now amount of electricity in faraday =`("wt. of Ag")/("EQUIVALENT wt. of Ag")=54.9/108=0.50 F = 48250` coulomb So applied electricity amount =`(48250xx100)/96.5` =50,000 coulomb =`5xx10^4` coulomb

13.	Small quantities of solutions of compounds TX, TY and TZ are put into separete test tubes containing X,Y and Z solution. TX does not react with any of these. TY reacts with both X and Z. Does not react with any of these. TY reats with both X and Z. TZ reacts with X. the decreasing order of state of oxidation of the anions X^(-),Y^(-),Z^(-)
Answer» `Y^(-),Z^(-),X^(-)` `Z^(-),X^(-),Y^(-)` `Y^(-),X^(-),Z^(-)` `X^(-),Z^(-),Y^(-)` SOLUTION :OXIDIZING tendency`prop(1)/("Electrode POTENTIAL")` `Txto`No reaction `TY to X,Z` `TZtoX` `implies`Order of electrode potential is `TY lt TZ lt TX` `implies`Order of oxidation of the anion is `Y^(-) GT Z^(-) gt X^(-)`.

14.	Small quantities of solutions of compounds TX, TY and TZ are put into separate test tubes containing X, Y andZ solutions. TX does not react with any of these. TY reacts with both X and Z. TZ reacts with X. the decreasing order of oxidation of the anions X^(-),Y^(-),Z^(-) is:
Answer» `Y^(-),Z^(-),X^(-)` `Z^(-),X^(-),Y^(-)` `Y^(-),X^(-),Z^(-)` `X^(-),Z^(-),Y^(-)` Solution :TX does ot ract with any solution. This MEANS that `X^(-)` is least easily oxidized. TY reacts with both X and Z. this means `Y^(-)` is oxidized by both. `(Y^(-)+XtoY+X^(-),Y^(-)+ZtoY+Z^(-))` TZ reacts with X only `(Z^(-)+XtoZ+X^(-))` `Y^(-)`, thus, DECREASING order of OXIDATION of anions `X^(-),Y^(-),Z^(-)` will be : `Y^(-),Z^(-),X^(-)`.

15.	Sm^(3+) acts as
Answer» an oxidising agent an reducing agent either neither SOLUTION :We know that, all `LN^(3+)` IONS act as reducing AGENTS by loss of one electron.

16.	Slow oxidation of chloroform in air leads to the formation of :
Answer» FORMYL CHLORIDE formic ACID `COCl_(2)` `TRICHLOROACETIC acid ANSWER :C

17.	Slow oxidation of chloroform in air leads to form:
Answer» formly chloride formic ACID `COCL_2` TRICHLOROACETIC acid Answer :C

18.	Slow decomposition of complex organic compounds into simpler ones by enzymes is known as
Answer» CONDENSATION Fermentation Dehydration POLYMERIZATION ANSWER :B

19.	Slope of the straight line obtained by plotting log_(10)k against 1/T represents what term?
Answer» `-E_(a)` `-2.303 E_(a)//R` `-E_(a)//2.303 R` `-E_(a)//R` SOLUTION :`UNDERSET(Y)underset(UARR)(log k) = underset(m) underset(uarr)(E_(a)/(2.303R)) underset(X)underset(DARR)(1/T) + underset(c)underset(uarr)(logA)` Where m `to` SLOPE

20.	Slow acting nitrogenous fertilizer among the following is
Answer» `NH_(2)CONH_(2)` `NH_(4)NO_(3)` `CaNCN` `KNO_(3)` Solution :CALCIUM CYANAMIDE is the slow acting nitrogenous fertilizer as it decompose very SLOWLY. `CaNCN +2H_(2)Oto CO_(2) +2NH_(3)` `NH_3 overset("Nitrifying")underset("bacteria")to ` soluble nitrates `to ` plants

21.	Sleeping pills are recommended to patients suffering from sleeplessness but it is not advisable to take them without consulting the doctor.
Answer» Solution :All types of sleeping pills WHETHER they contain chlordiazepoxide, MEPROBAMATE, equanil, valium or barbiturates have side effects. Sleeping pills make you to breathe more slowly and less deeply. That can be dangerous for people who have asthma or some other heart problems. Sleeping pills also cause burning or tingling in the hands, feet or LEGS, changes in appetite, constipation, diarrhoea, dizziness and drowsiness. Further, dosage of a particular sleeping pill is also important since WOMEN clear the drug from their systems more slowly than men. In view of the above side effects of the sleeping pills, it is ADVISABLE to consult the doctor before taking a particular sleeping pill.

22.	Slope of the plot between V and P at constant temperature
Answer» zero 1 1//2 `1sqrt(2)` SOLUTION :Plot is a HORIZONTAL line. HENCE SLOPE =0

23.	Sleeping pills are recommended to patients suffering from sleeplessless but is not advisable to take them without consulting the doctor.
Answer» Solution :All types of sleeping pills whether they contain chlordiazepoxide, meprobamate, EQUANIL, valium or barbiturates have side effects. Sleeping pills make you to breathe more SLOWLY and less deeply. That can be dangerous for people who have asthma or some other HEART problems. Sleeping pills also cause burning or tingling in the hands, feet or legs, changes in appetite, constipation, DIARRHOEA, dizziness and drowsiness. Further, dosage of a particular sleeping pill is also important since women clear the DRUG from their systems more slowly than men. In view of the above side effects of the sleeping pills, it is advisable to consult the doctor before taking a particular sleeping pill.

24.	Slaking is the process of adding water to :
Answer» `Ca(OH)_(2)` `CaCl_(2)` CAO `CaCO_(3)` Answer :C

25.	Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor. Why ?
Answer» SOLUTION :Most of drugs taken in doses higher than that recommended by the doctor may produce harmful EFFECTS and, act as poison and can cause even death. Therefore, a doctor MUST always be CONSULTED before taking the drug.

26.	Sleeping pills are recommended by doctors to the patients suffering from sleeplessness but it is not advisable to take its doses without consultation with the doctor. Why?
Answer» Solution :Most of the DRUGS TAKEN in doses HIGHER than recommended may cause harmful effect and act as poison. Therefore, a doctor should ALWAYS be consulted before taking MEDICINE.

27.	Slaked lime is used in the manufacture of:
Answer» Cement Fire-bricks Pigment White wash Answer :D

28.	Slaked lime reacts with chlorine to give :
Answer» `CaCl_(2)` CAO `CaOCl_(2)` `CaCO_(3)` Answer :C

29.	Slaked lime is:
Answer» `CaCO_3` CAO `Ca(OH)_2` `Ca(C_2O_4)` ANSWER :C

30.	Slag is a product of
Answer» Fluxand COKE Cokeand METALOXIDE Fluxand impurities Metal andflux ANSWER :C

31.	Slag is formed by reaction between
Answer» IMPURITIES and coke impurities and ore impurities and flux flux and coke Answer :C

32.	Slag coming out at the bottom of a blast furance during extraction of iron from its ores , is used in making :
Answer» Roads Fertilizers PLASTICS GLASS moulds Answer :A

33.	Slag is :
Answer» flux and coke METAL and flux coke and metal OXIDE flux and IMPURITIES ANSWER :D

34.	Slacked lime is used in the manufacture of
Answer» CEMENT Fire bricks Pigments Medicines Solution :Cement

35.	Skin turns yellow in contact with conc. HNO_3, because:
Answer» PROTEINS are CONVERTED into xanthoproteins Water is REMOVED by the acid Skin GETS burnt Nitrocellulose is formed Answer :A

36.	Sketch shows the plot of Z v/s P for a hypothetical gas for one mole at three distint temperature. Boyle's temperature is the temperature at which gas shows ideal behaviour over a pressure range in the low pressure region.Boyle's temperature (T_b)=a/(Rb).If a plot is obtained at temperature well below Boyle's temperature then the curve will show negative deviation, in low pressure region and positive deviation in the high pressure region. Near critical temperature the curve is more likely as CO_2 and the temperature well above critical temperature curve is more like H_2 at 0^@C as shown above.At high pressure suppose all the constant temperature curve varies linearly with pressure according to the following equation : Z=1+(Pb)/(RT) (R=2 cal "mol"^(-1) K^(-1)) As shown in the figure at 200 K and 500 atm value of compressibility factor is 2 (approx).Then volume of the gas at the point will be
Answer» <P>0.01 L 0.09L 0.065 L 0.657 L Solution :USE `z=(PV_(m))/(RT)IMPLIES V_m=(z.RT)/P`

37.	Sketch shows the plot of Z v/s P for a hypothetical gas for one mole at three distint temperature. Boyle's temperature is the temperature at which gas shows ideal behaviour over a pressure range in the low pressure region.Boyle's temperature (T_b)=a/(Rb).If a plot is obtained at temperature well below Boyle's temperature then the curve will show negative deviation, in low pressure region and positive deviation in the high pressure region. Near critical temperature the curve is more likely as CO_2 and the temperature well above critical temperature curve is more like H_2 at 0^@C as shown above.At high pressure suppose all the constant temperature curve varies linearly with pressure according to the following equation : Z=1+(Pb)/(RT) (R=2 cal "mol"^(-1) K^(-1)) Plot at Boyle's temperature for the gas will be
Answer» SOLUTION :AT boyles temp, a REAL GAS shows ideal behaviour in the LOW pressure REGION.

38.	Sketch shows the plot of Z v/s P for a hypothetical gas for one mole at three distint temperature. Boyle's temperature is the temperature at which gas shows ideal behaviour over a pressure range in the low pressure region.Boyle's temperature (T_b)=a/(Rb).If a plot is obtained at temperature well below Boyle's temperature then the curve will show negative deviation, in low pressure region and positive deviation in the high pressure region. Near critical temperature the curve is more likely as CO_2 and the temperature well above critical temperature curve is more like H_2 at 0^@C as shown above.At high pressure suppose all the constant temperature curve varies linearly with pressure according to the following equation : Z=1+(Pb)/(RT) (R=2 cal "mol"^(-1) K^(-1)) In very high pressure region if Z v/s P is plotted at 1200 K for the above gas then it will have greatest slope.
Answer» TRUE False Can't say not RELATED to the paragraph Solution :`z=1+(PB)/(RT)`, Slope `=B/(RT)` and hence is inversely proportional to T.

39.	Size ratio is minimum in :-
Answer» `(LI^(-))/(Li)` `(H^(-))/(H)` `(NA^(-))/(Na)` can not be predicted Answer :C

40.	Sketch shows the plot of Z v/s P for a hypothetical gas for one mole at three distint temperature. Boyle's temperature is the temperature at which gas shows ideal behaviour over a pressure range in the low pressure region.Boyle's temperature (T_b)=a/(Rb).If a plot is obtained at temperature well below Boyle's temperature then the curve will show negative deviation, in low pressure region and positive deviation in the high pressure region. Near critical temperature the curve is more likely as CO_2 and the temperature well above critical temperature curve is more like H_2 at 0^@C as shown above.At high pressure suppose all the constant temperature curve varies linearly with pressure according to the following equation : Z=1+(Pb)/(RT) (R=2 cal "mol"^(-1) K^(-1)) Which of the following is correct :
Answer» `a/b lt 0.4 k cal mol^(-1)` 0.4 k cal `"mol"^(-1) lt a/b lt 2` k cal `"mol"^(-1)` `a/b lt 0.4 k cal mol^(-1)` `a/b =1 K Cal "mol"^(-1)` SOLUTION :`200ltT_blt1000` `implies 20lta/(Rb)lt1000implies 400 cal lt a/b lt 2000 cal`

41.	Sketch shows the plot of Z v/s P for a hypothetical gas for one mole at three distint temperature. Boyle's temperature is the temperature at which gas shows ideal behaviour over a pressure range in the low pressure region.Boyle's temperature (T_b)=a/(Rb).If a plot is obtained at temperature well below Boyle's temperature then the curve will show negative deviation, in low pressure region and positive deviation in the high pressure region. Near critical temperature the curve is more likely as CO_2 and the temperature well above critical temperature curve is more like H_2 at 0^@C as shown above.At high pressure suppose all the constant temperature curve varies linearly with pressure according to the following equation : Z=1+(Pb)/(RT) (R=2 cal "mol"^(-1) K^(-1)) For 500 K plot value of Z changes from 2 to 2.2 if pressure is varied from 1000 atm to 1200 atm (high pressure ) then the value of b/(RT) will be
Answer» `10^(-3) "atm"^(-1)` `2xx10^(-3) "atm"^(-1)` `5xx10^(-4) "atm"^(-1)` `10^(-4) "atm"^(-1)` Solution :We know that, in the high pressure REGION `z=1+(RB)/(RT)` SOLVE this equation for the two points and get result (VALUE of `b/(RT)`)

42.	Size of the nucleus is:
Answer» `10^(-15)` CM `10^(-13)` cm `10^(-10)` cm `10^(-8)` cm Answer :B

43.	Size order of octahedral, tetrahedral & cubic void is -
Answer» CUBIC `GT` tetrahedral VOID `lt` OCTAHEDRAL void cubic `gt` tetrahedral void `gt` octahedral void cubic = tetrahedral void = octahedral void cubic `lt` octahedral void `lt` tetrahedral void Answer :D

44.	Size of colloidal particles may range from:
Answer» `1` to `1000 nm` `10` to `100` PM `1` to `100 mu m` `1` to `10 MM` Solution :Colloidal particle has SIZE RANGE of `1` to `1000` nm.

45.	Sixteen aldohexosea are possible. How many of these do not undergo mutarotation or osazone formation ?
Answer» SOLUTION :0 (zero). All ALDOHEXOSES undergo MUTAROTATION and form OSAZONES.

46.	Size of ionic species follows the order:
Answer» `I^(-) LT I^+ lt I` `I^(-) lt I lt I^+` `I^+ lt I lt I^-` `I^+ lt I^(-) lt I` ANSWER :C

47.	Six volumes of oxygen, on complete ozonisation, form…..volumes of ozone.
Answer» 2 4 6 3 Answer :B

48.	Six grams of urea ( molar mass = 60 ) are dissolved in 90 g of water. The relative lowering of vapour pressure is equal to
Answer» 0.0196 0.06 0.01 0.0202 Solution :Relative LOWERING of VAPOUR pressure `=` Mole fraction of SOLUTE `(x_(B))` `x_(B)=((6)/(60))/(6/60 +90/18)=0.0196`

49.	Siulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offfers an exception and is concentrated by leaching ?
Answer» Argentitie Copper pyrites Sphalerite Galena Answer :A

50.	Six carbon atoms of benzene are of
Answer» ONE TYPE TWO TYPES Three types SIX types Answer :A