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.	Mixing of acetone and chloroform occurs wioth reduction in volume and is an exothermic process. What change will occur in vapour pressure ? Explain you answer.
Answer» SOLUTION :VAPOUR PRESSURE of the solution will DECRESE.

2.	Mixing of HNO_(3) and HCl is reaction:
Answer» ENDOTHERMIC REACTION EXOTHERMIC reaction both exothermic and endothermic depend on entropy of reaction Answer :B

3.	Mixed ether will not be formed in the reaction-
Answer» `CH_(3)OCH_(2)Cl+C_(2)H_(5)MGBR` `CH_(2)N_(2)+C_(2)H_(5)OH` `C_(2)H_(5)ON a+CH_(3)I` `C_(2)H_(5)OH+H_(2)SO_(4)(140^(@)C)` Answer :D

4.	Mixed melting point of an organic compound is determine to
Answer» CHECK the PURITY of an organic compound check whether the TWO COMPOUNDS are same check whether the two compounds are differents check whether the two compounds can be separated by fractional crystallization. Solution :To check is purity and also to check whether the two compounds are same or different.

5.	Mixed ether is also known as
Answer» SYMMETRIC ethers unsymmeteric ethers dialkyl ethers oxane ANSWER :B

6.	Mixed anhydride of nitrous and nitric acid is:
Answer» `NO` `NO_2` `N_2O_5` `N_2O` ANSWER :B

7.	("mix")B overset("Cold")underset("HI")larr (CH_(3))_(3) C-OCH_(3) overset("Hot ")underset("HI ")(rarr)A ("mix")
Answer» A is the mixture of `(CH_(3))_(3) C-OH and CH_(3)-I` B is the mixture of `(CH_(3))_(3) C-I and CH_(3) -OH` A is the mixture of `(CH_(3))_(3) C-I and CH_(3) - I ` B is the mixture of `(CH_(3))_(3) C-Iand CH_(3) - OH` A and B are identical mixture of `CH_(3)I` and `(CH_(3))_(3)C-OH` none of these Answer :B

8.	Mixed aldol reactions require
Answer» only ONE of the reactants to be able to form an ENOLATE. one of the reactants to be more REACTIVE towards the nucleophile. MUCH stronger BASES. (b) and (c ). Answer :D

9.	Mitomycin C contains an ……………. Ring.
Answer» ANSWER :AZIRIDINE

10.	smoke, fumes and dust are non-vibale particulate matters in the atmosphere.
Answer» ANSWER :A

11.	Mischmetal contains about "…............" percent of lanthanoids and is used in makingMg-based alloy called "…..................".
Answer» ANSWER :`95%`, PYROPHORIC ALLOY

12.	Mischmetal.
Answer» Solution :Mischmetal is a PYROPHORIC alloy of lanthanoids consiting of La, Fe and TRACES of S, C, CA and AL. USES : (1) Since it withstands very high temperature, it is used to prepare small furances. (2) It is used in gas lighters. (3) It is used in bullets and shells. (4) It is used to improve the quality of steel and Mg alloys.

13.	Mispickel is the ore of:
Answer» Sb Bi P As Answer :D

14.	Misch metal is an alloy of :
Answer» La Th Ac NONE of these. Answer :A

15.	What is Misch metal ? Given its composition and use.
Answer» An ALLOY ofAi A mixture of CHROMIUM and `PbCrO_4` An alloy of lanthanoid metals An alloy of copper Solution :Alloy of Ce , LA

16.	Minor product obtained when anisole on methylation
Answer» ANSWER :C

17.	Minimumreactive towards dehydration in acidic mwdium
Answer» ANSWER :C

18.	Minimum number of photons of light of wavelength 4000 Å which provide 1 J energy
Answer» `2xx10^(10)` `2xx10^(9)` `2xx10^(20)` `2xx10^(18)` Answer :D

19.	Minimum m.w. rarr molecule at least contain one selenium. 10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be
Answer» 2 mol 3 mol 4 mol 1 mol Solution :`{:(H_(2),+,1/2 O_(2) rarr H_(2)O),(10/2,,64/32),(="5 mol",,="2 mol"):}` Oxygen is the limiting agent. `:' 1//2O_(2)` gives `=1` mole of `H_(2)O` `:. 2O_(2)` will give `=4` moles of `H_(2)O`.

20.	Oxidation number of Pb is minimum in :
Answer» `PBO` `Pb_3O_4` `PbO_2` All of these Answer :B

21.	Minimum F-S-F bond angle present in :
Answer» `SSF_(2)` `SF_(6)` `SF_(2)` `F_(3)SSF` Solution :

22.	Minimum carbon containing 2^(@) alcohol undergoes dehydration and gives A. Benzene diazonium chloride when heated with water gives B which on reduction by zinc metal gives A and C also react with other. Name the process between A and C.
Answer» REIMER - Tiemann Reaction Kolbe-Schmitt Reaction CUMENE PROCESS Fries Rearrangement Solution :Cumene Process

23.	Minimum distance between two tetrahedral voids if a is the edge length of the cube is
Answer» `a/4` `a/(2sqrt2)` `a/2` `SQRT(3a)/4` ANSWER :C

24.	Minimum bond length will be in:
Answer» `H_2S` `HF` `H_2O` `ICL` ANSWER :B

25.	Minimum bond angle is found in which of the following hydride
Answer» `H_(2)O` `H_(2)S` `H_(2)SE` `H_(2)TE` ANSWER :D

26.	Minimum bond length will be in
Answer» `H_2 O` `H_2 S` `ICI` HF Answer :D

27.	Minerals from which metals can be extracted economically and easily are called ores.The extraction of metals from theirs ores involves the following processes. (i)Concentration. (ii)Calcination \| roasting \| leaching . (iii)Reduction. It is carried out be one of the following methods. Which of the following reactions reactions does not occur in Bessemer converter in the extraction of copper from chalcopyrites ?
Answer» `2Cu FeS_2+4O_2toCu_2S+2FeO+3SO_2` `FeO+SiO_2toFeSiO_3` `2FeS+3O_2to2FeO+2SO_2` `Cu_2S+2Cu_2Oto6Cu+SO_2` SOLUTION :The reaction occurs during ROASTING in reverberatory furnace at moderate temperature in PRESENCE of air.

28.	Minerals from which metals can be extracted economically and easily are called ores.The extraction of metals from theirs ores involves the following processes. (i)Concentration. (ii)Calcination \| roasting \| leaching . (iii)Reduction. It is carried out be one of the following methods. Silver is extracted from its native ore by :
Answer» Formation of SOLUBLE complex by dilute solution of NaCN in presence of air followed by the reduction with zinc Formation of soluble complex by dilute solution of NaCN in absence of air followed by the reduction with zinc Roasting followed by the self reduction Roasting followed by electrolytic reduction Solution :`O_2` oxidases silver to silver (I) ion which then prouduce soluble complex with `CN^(-)` ions . `2Ag+4NaCN+1/2 O_2 +H_2O HARR 2Na[Ag (CN)_2]+2NaOH`. `2Na[Ag (CN)_2]+ZntoNa_2[ZN(CN)_4]+ZntoNa_2[Zn(CN)_4]+Agdarr`

29.	Minimata disease first occurred in
Answer» Japan China Korea Russia Solution :MINIMATA disease was caused by EATING FISH taken from MERCURY POLLUTED Minimata bay.

30.	Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following processes. (i) Concentration (ii) Calcination \|roasting \| leaching (iii) Reduction. It is carried out by one of the following methods. (a) Carbon \|carbon monoxide reduction.(b) Self reduction. (c) Electrolytic reduction. (d) Reduction by more electropositiv metal (i.e displacement method). Silver is extracted from its native ore by:
Answer» FORMATION fo solubel COMPLEX by dilute SOLUTION of NACN in PRESENCE of air followed by the reduction with zinc Formation of soluble complex by dilute solution of NaCN in absence of air followed by the reduction with zinc roasting followed by the self reduction. roasting followed byelectrolytic reduction. Answer :a

31.	Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following processes. (i) Concentration (ii) Calcination \|roasting \| leaching (iii) Reduction. It is carried out by one of the following methods. (a) Carbon \|carbon monoxide reduction.(b) Self reduction. (c) Electrolytic reduction. (d) Reduction by more electropositiv metal (i.e displacement method). Which of the following reaction does not occur in Bessener converter in the extraction of copper from chalcopyrites.
Answer» `2CU FeS_(2)+O_(2) rarr Cu_(2)S+2FeS+SO_(2)` `FeO+SiO_(2) rarrFeSiO_(3)` `2FeS+3O_(3) rarr 2FeO+2SO_(2)` `Cu_(2)S+2Cu_(2)O rarr 6Cu+SO_(2)` Answer :d

32.	Mineralsfromwhichmetalsare extractedconveniently andeconomically arecalled ……………… .
Answer» ANSWER :ORES

33.	Mineral acids such as HNO_(3), HCl and H_(2)SO_(4) are widely used in industry and in the laboratory. In fact, applications of H_(2)SO_(4) in industry are so vast that it is actually called King of Chemicals. But unfortunately, in the recent past, many instances of acid attack by eve teasers and frustrated lovers on the faces of young girls have been reported in newspapers and shown on TV. This is a serious social evil and must be totally eliminated from the society. Read the above passage and answer the following questions : (i) Comment on the statement-should production/manufacture of acids be banned ? Give three valid reasons to justify. (ii) As a student of chemistry, what steps would you suggest to combat this social menace ? (iii) Recently 'Honourable Supreme Court of India' has suggest some measures to check such incidents of acid attack. Comment.
Answer» Solution :(i) `HNO_(3)` is chiefly used in the manufacture of fertilizers, explosives, perfumes, dyes and medicines. Hydrochloric acid is used in the manufacture of metal chlorides, chlorine, `NH_(4)Cl` and glucose by hydrolysis of starch. It is also used in medicines, dyeing, calicoprinting, tanning and sugar industry. Sulphuric acid is chiefly used in the manufacture of fertilizers, explosives, dyes, drugs, paints, pigments, detergents, as an electrolyte in lead storage batteries and as a DRYING and dehyrating agent. In view of wide range of APPLICATIONS, the manufacture of acids cannot be banned. (ii) Acid attacks on YOUNG girls/women is a serious social evil. It has ruined the lives of many young girls/women. Therefore, a sense of awareness should be created in the minds of young boys against acid attacks by showing them skits, plays and dramas and by slogan writing at public places highlighting the damaging effects of acid attacks. (iii) To check acid attacks on young girls/women, Supreme court of India has suggested that acids should to sold only after proper verification of the identity of the buyer. But this is not enough. The convicted acid ATTACKERS should be boycotted, should not be OFFERED jobs in private and Government organisations and a sense of hatred may be created against them by sticking bills with their photographs at public places.

34.	Minamata disease was caused due to the consumption of
Answer» SEA FOOD containing lot of cadmium Fish contaminated with mercury Oysters with lot of pesticide Sea food contaminated with selenium Solution :Mercury is very persistent effluent. Higher concentration of HG causes a serious disease CALLED minimata diseases

35.	Minamata disease is a pollution related disease results from
Answer» ACCUMULATION of arsenic into atmosphere Oil spills into sea Release of industrial WASTE mercury into fishing water Release human organic waste into DRINKING water Answer :C

36.	Minamata disease is due to pollution of
Answer» aresenic into the atmosphere organic waste into DRINKING water oil spill in water industrial waste mercury into FISHING water Solution :Minamata is caused by HG POISING.

37.	Miller synthesised simple amino acids from:
Answer» `H_2,NH_3,CH_4,H_2O` `H_2,O_2,N_2,H_2O` `CH_4,O_2,N_2,SO_2` `NH_3,O_2,CO_2,HCN` ANSWER :A

38.	Milk turns sour at 40^(@)C three times faster than at 0^(@)C. Hence, E_(a) in calories of process of turning of milk sour is
Answer» `(2.303xx2xx313xx273)/40 LOG3` `(2.303xx2xx313xx273)/40 LOG(1/3)` `(2.303xx2xx40)/(273xx313) log3` NONE of these Answer :A

39.	Milk turns sour at 40^@C three times as faster as at 0^@C. The energy of activation for souring of milk is:
Answer» 4.693 kcal 2.6 kcal 6.6kcal None of these Answer :A

40.	Milk turns sour at 40^(@)C three times as faster as 0^(@)C. Hence , E_(a) in the process of turning of milk sour is
Answer» `(2.303xx2xx313xx273)/(40)LOG3` `(2.303xx2xx313xx273)/(40)LOG((1)/(3))` `(2.303xx2xx40)/(273xx313)log3` None of these ANSWER :A

41.	Milk sugar is called ..........in which ..........is present in the reducing form while ........is present in the non -reducing form.
Answer» SOLUTION :LACTOSE, GLUCOSE, GALACTOSE

42.	Milk sugar is commonly known as :
Answer» Maltose GLUCOSE LACTOSE Fructose. SOLUTION :Milk sugar is KNOWN as lactose.

43.	Milk sugar is ( a disaccharide):
Answer» Sucrose Lactose Fructose Glucose Answer :B

44.	Milk of sulphur is obtained by
Answer» passing `H_(2)S` through `HNO_(3)` the reaction of `Na_(2)S_(2)O_(3)" with "HCl` MELTING sulphur in a dish boiling MILK of lime with sulphur and then with HCl. Solution :Milk of lime is boiled with sulphur and then calcium penta sulphide so-formed is decomposed with HCl to get white amorphous PRECIPITATE of sulphur. `underset(("Milk of lime"))(3Ca(OH)_(2))+12S to underset(("Milk of sulphur"))(2CaS_(5)+CaS_(2)O_(3)+3H_(2)O)`

45.	Milk of magnesia is:
Answer» `MG(OH)_2` `Ca(OH)_2` `BA(OH)_2` None of these Answer :A

46.	Milk is an oil in water type emulsion.
Answer»

47.	Milk of lime is:
Answer» `CaCO_3` `CaHCO_3` `CA(OH)_2` `CaSO_4.2H_2O` ANSWER :C

48.	Milk is an example of colloidal system of:
Answer» LIQUID DISPERSED in GAS Gas dispersed in as Solid dispersed in gas Liquid dispersed in liquid. Answer :D

49.	Milk is an example of:
Answer» WATER DISPERSED in FAT Water dispersed in OIL Oil dispersed in water fat dispersed in water SOLUTION :fat dispersed in water

50.	Milk is an example for
Answer» w/o TYPE of EMULSION o/w type of emulsion w/w type emulsion o/o type of emulsion Answer :B