94420 + Interview Questions in Chemistry in Class 12

1.	Sulphur forms for chlorides S_2 Cl_2 and SCl_2. The equivalent mass of sulphur in SCl_2 is 16 . The equivalent mass of sulphur in S_2 Cl_2 is
Answer» 8 16 32 64 Answer :C

Discussion

2.	Sulphur combine with which of the following halogens to form a compound ?
Answer» `Cl_2` `Br_2` `I_3` `F_2` ANSWER :C

Discussion

3.	Sulphur disappears when it is boiled in a solution of sodium sulphite. This is due to formation of
Answer» `SO_2` SODIUM SULPHATE `SO_3` Sodium thiosulphate Solution :`Na_2SO_3 + S .^("BOIL") Na_2S_2O_3`

Discussion

4.	Sulphur disappears when boiled with an aqueous solution of sodium sulphite. Why ?
Answer» SOLUTION :S reacts with `Na_(2)SO_(3)` to form sodium THIOSULPHATE `(Na_(2)S_(2)O_(3))` and hence S DISAPPEARS. `Na_(2)SO_(3) + S rarr Na_(2)S_(2)O_(3)`

Discussion

5.	Sulphur dioxide present in the industrial chimney exhaust causes :
Answer» RESPIRATORY and LUNG disease Reduction in plant's PRODUCTIVITY owing to acid rain Corrosion of BUILDING materials All of the above Answer :D

Discussion

6.	Sulphur dioxide may be recognised by its:
Answer» CHARACTERISTIC PUNGENT smell of BURNING sulphur Ability to turn DICHROMATE paper green Ability to decolourise acidified `KMnO_4` solution All Answer :D

Discussion

7.	Sulphur dioxide causes I. respiratory diseases in human beings. II. Red haze in the traffic III. Irritation of the eyes. The correct option is
Answer» Both I and II Both II and III Both I and III I, II and III Answer :C

Discussion

8.	Sulphur di oxide, how many times heavier than air?
Answer» 2 TIMES 2.5 times 2.2 times 2.3 times SOLUTION :2.2 times

Discussion

9.	Sulphur dioxide and sulphite an antioxidants.
Answer» Solution :Sulphur dioxide is WIDELY used as preservative and antioxidant in food and beverage industries. (2) Sulphites are used as antioxidant, and they reduce discolourationof FRUITS, vegetables and dehydrated potatoes. They are also used preservative in wine, dairy PRODUCTS, sauce, jams, jellies, etc. (3) They are used as food additive as antimicrobial AGENTS, structure modifiers, enzyme inhibitors. (4) The salts usedare sodium or potassium sulphites or bisulphites.

Discussion

10.	Sulphur burns in oxygen to form sulphur dioxide . The properties of sulphur dioxide are:
Answer» totally different from sulphur and OXYGEN SIMILAR to sulphur similar to oxygen more similar to sulphur than oxygen. Answer :A::B::C

Discussion

11.	Sulphur atom of which oxoacid have non bonding electron pair ?
Answer» SULPHUROUS ACID SULPHURIC acid Disulphuric acid Pyrosulphuric acid Answer :A

Discussion

12.	Sulphur-35 (34.96903 amu) emits a beta - particle but no gamma- rays, the product is chlorine -35 (34.96885 amu). The maximum energy emitted by the beta- particle is
Answer» 0.016767 MeV 1.6758 MeV 0.16758 MeV 16.758 MeV Solution :Mass defect = mass of SULPHUR - mass of CHLORINE `= 34.96903 - 34.96885 = 0.00018g` Binding ENERGY = mass defect `xx 931` `= 0.00018 xx 931` `= 0.1675 MeV`

Discussion

13.	Sulphphuryl chloride (SO_(2) CI_(2)) reacts with white phosphorus (P_(4)) to give
Answer» `PCI_(5), SO_(2)` `OPCI_(3), SOCI_(2)` `PCI_(5), SO_(2), S_(2) CI_(2)` `OPCI_(3), SO_(2), S_(2) CI_(2)` Solution :`P_(4(s)) + 10 SO_(2)Cl_(2(l)) to 4PCl_(5(s)) + 10 SO_(2(G))`

Discussion

14.	Sulphur -35 (34.96903 amu) a beta-particle but no gamma-ray. The product is chlorine - 35 (34.96885 a.m.u). The maximum energy emitted by the beta- particle is
Answer» `16.758` MEV `1.6758` MeV `0.16758` MeV `0.016758 ` MeV Solution :Mass DEFECT = `34.96903 - 34.96885 = 0.00018 amu` Energy RELEASED = `931.5 xx 0.00018 MeV = 0.167 MeV`

Discussion

15.	Sulphonation of phenol with conc. H_2SO_4 at373 K gives
Answer» p-phenol sulphonic acid o-phenol sulphonic acid m-phenol sulphonic acid all of these Answer :A

Discussion

16.	Sulphonation of benzene is done by which reagent?
Answer» CONC. `HNO_3 + Conc. H_2SO_4` FUMING sulphuric acid `SO_2` DILUTE sulphuric acid Answer :B

Discussion

17.	Sulphonation of nitrobenzene gives :
Answer» <P>p-nitrosulphonic aciod m- nitrosulphonic acid o-nitrosulphonic acid o-and p- nitrosulphonic acid Answer :B

Discussion

18.	Sulphonation of benzoic acid produces mainly
Answer» o-sulphobenzoic acid m-sulphobenzoic acid p-sulphobenzoic acid o-and p-sulphobenzoic acid Solution :

Discussion

19.	Sulphonation of benzene is carried out by treating benzene with concentrated sulphuric acid at 330 K in the presence of :
Answer» `SO_(3)` `HNO_(3)` `HIO_(3)` `AlCl_(3)` ANSWER :A

Discussion

20.	Sulphonamides act as
Answer» Antiseptic Analgesic ANTIMICROBIALS Antipyretic Solution :SULPHONAMIDES ACT as antimicrobials

Discussion

21.	Sulphir combines with.
Answer» MG Au Pt Te Solution :Mg is most REACTIVE of these METALS.

Discussion

22.	Sulphides of cations of analytic group IIB are precipitated by H_2S in:
Answer» ACIDIC medium Neutral medium Alkaline medium None of these Answer :A

Discussion

23.	Sulphides ions in alkaline solution react with solid sulphur to form polyvalent sulphide ions. The equillibrium constant for the formationof S_2^(2-) and S_3^(2-) from S and S^(2-) ions are 1.7 and 5.3 respectively.What is the equillibrium constant for the formation of S_3^(2-) from S_2^(2-) and S ?
Answer» 1.33 3.11 4.21 1.63 Answer :B

Discussion

24.	Sulphide ores of the metals are usually concentrated by froth floatation process. Which of the following sulphide ores offers an exception and is concentrated by chemical leaching ?
Answer» Galena Copper pyrite Sphalerite Argentite. Solution :Argentite `(Ag_(2)S)` an ORE of silver metal is concentrated by the LEACHING and the process is KNOWNAS Mac-Arthur and Forest process.

Discussion

25.	Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and concentrated by chemical leaching?
Answer» Galena Copper pyrite Sphalerite Argentite Solution :LEACHING is the selective DISSOLUTION of the desired MINERAL leaving behind the impurities in a SUITABLE dissolving agent, e..g. Argentitie or Silver glance, `Ag_(2)S` is an ore of silver. Silver is EXTRACTED from argentitc by the mac-Arthur and Forest process (leaching process). `Ag_(2)S+4NaCN to 2Na[Ag(CN)_(2)]+Na_(2)S` `4 Au+8 KCN+2H_(2)O+O_(2) to 4K[Au (CN)_(2)]+4KOH`

Discussion

26.	Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?
Answer» Galena COPPER pyrite Sphalerite Argentite Solution :`SiO_2` is present as impurity in metallurgy of Fe. So `CAO` is used as a flux, which COMBINE with `SiO_2` and FORM slag. `underset("Flux")(CaO) + underset("Impurity")(SiO_2) to underset("Slag")(CaSiO_3)`

Discussion

27.	Sulphideores ofmetalsare usuallyconcentrated by FrothFloatationprocess. Which one ofthefollowingsulphideoresoffers an exceptionandisconcentratedbychemicalleaching ?
Answer» Sphalerite ARGENTITE GALENA COPPER pyrite Solution :Argentite ` (Ag_2 S) ` beinga lowgradore ispreferablyextractedbyleachingwith NACN.

Discussion

28.	Sulphide ores are generally concentrated by....
Answer» Froth floatation Roasting MAGNETIC SEPARATION Carbon REDUCTION ANSWER :A

Discussion

29.	Sulphide ores are common for the metals
Answer» `Ag ,Cu and Pb` `Ag ,Cu and Sn` `Ag ,MG and Pb` `AI,Cu and Pb` SOLUTION :SULFIDE ORE of Agis Argents andof Pbisgalents (PbS) and of Cu iscopperglance `(Cu_(2)S)` Hence (a) is CORRECT

Discussion

30.	Sulphide ores are concentrated by froth floatation process. Write the name or formulae of any two sulphide ores of copper.
Answer» ANSWER :COPPER PYRITES `(CuFeS_2), Copper GLANCE `(Cu_2S)`

Discussion

31.	Sulphide oresare commonfor metals
Answer» Ag, Cu and Pb Ag, Cu and Sn Ag, MG andPb Al, Cu andPb Solution :Silverglance` (Ag_2S) ` , Copperpyrites ` (CuFeS_ 2 ) `andgalena ` (PBS)`.

Discussion

32.	Sulphide ore is converted to oxide form by using the process _________.
Answer» Calcination Roasting Smelting Leaching Answer :B

Discussion

33.	The sulphide ores are generally concentrated by :
Answer» ELECTROMAGNETIC PROCESS Distillation Gravity process FROTH FLOATATION process . ANSWER :D

Discussion

34.	Sulphide ore of zinc is concentrated by :
Answer» FLOATATION PROCESS ELECTROMAGNETIC process Gravity process DISTILLATION ANSWER :A

Discussion

35.	Sulphide ions react with Na_2[Fe(NO)(CN)_5] to form purple coloured compound Na_4[Fe(CN)_5 (NOS)] in the reaction, the oxidation state of iron changes from
Answer» `+2` to +3 `+3` to +2 `+2` to +4 does not CHANGE. Solution :No change

Discussion

36.	Sulphide ore is :
Answer» COPPER pyrites Malachite Carnallite Magnetite Answer :A

Discussion

37.	Sulphide ions react with Na_(2)[Fe(NO)(CN)_(5)] to form a purple coloured compound Na_(4)[Fe(CN)_(5)(NOS)], in the reaction the oxidation state of ions
Answer» CHANGES from + 2 to + 3 Changes from + 3 to + 2 Changes from + 2 to + 4 does not change Solution :No change in oxidationnumber of FE

Discussion

38.	Sulphide ion reacts with [Fe(CN)_(5)NO] to form a purple coloured compound (X). In this reaction oxidation state of iron .
Answer» CHANGES from +2 to +3 changes from +3 to +2 changes from +2 to +4 does not change. Answer :D

Discussion

39.	Sulphide ions react with Na_(2)[Fe(NO)(CN)_(5)] from a purple coloured compound Na_(4)[Fe(CN)_(5)(NOS)]. In the reaction, the oxidation state of iron
Answer» changes from +2 to +3 changes from +3 to +2 changes from +2 to +4 does not change Solution :No change in OXIDATION STATE `Na_(2)[Fe^(2+)(NO)(CN)_(5)]+Na_(2)S to Na_(4)[Fe^(+2)(NOS)(CN)_(5)]`

Discussion

40.	Sulphide are of zinc//copper is concentrated by
Answer» froth-floatation PROCESS electromagnetic process gravity separation distillation. Solution :SULPHIDE ORE of zinc/copper is CONCENTRATED by floatatoin process.

Discussion

41.	Sulphate of alkaline earth metal which crystallises without water of hydration is that of
Answer» `Be^(2+)` `MG^(2+)` `CA^(2+)` `Sr^(2+)` Solution :`SrSO_4` CRYSTALLISES without water of HYDRATION.

Discussion

42.	Which of the following alkali metal does not form alum:
Answer» Cs K Na Li Answer :D

Discussion

43.	Sulphate ion has____geometry.
Answer» Trigonal Square planar Tetrahedral None Answer :C

Discussion

44.	Sulphapyridineis
Answer» ANALGESICS antipytatics antibiotics antialllergic Answer :C

Discussion

45.	Sulphate ion has …… geometry
Answer» TRIGONAL Square PLANAR TETRAHEDRAL Angular Answer :C

Discussion

46.	Sulphanilic acid is not soluble in organic solvents. Explain ?
Answer» Answer :Sulpharilic acid EXIST as Z witterion `(##ALN_CHM_C09(II)_E01_899_Q01##)` Due to its Ionic CHARACTER it is INSOLUBLE in organic SOLVENTS.

Discussion

47.	Sulphanilic acid although has acidic as well as basic group, it is soluble in alkali but insoluble in mineral acid. Sulphanilic acid is not soluble in organic solvents.
Answer» SOLUTION :Sulphanilic ACID exist as Zwitterion The weakly ACIDIC `-^(+)NH_(3)` transfers `H^(+)" to "OH^(-)` to form a soluble salt, `P-NH_(2)-C_(6)H_(4)-SO_(3)-Na^(+)` on the other hand `-SO_(3)^(-)` is too weakly basic to accept `H^(+)` from STRONG acids. Due to its ionic character it is insoluble in organic SOLVENTS.

Discussion

48.	Sulphan' is
Answer» a MIXTURE of `SO_(3)` and `H_(2)SO_(5)` `100%` conc. `H_(2)SO_(5)` a mixture of GYPSUM and conc. `H_(2)SO_(4)` 100% oleum (a mixture of 100%`SO_(3)` in 100% `H_(2)SO_(4)` Answer :D

Discussion

49.	Sulphaguanidine is used for :
Answer» DYSENTERY URINARY INFECTIONS Antiseptic Antipyretic Answer :A

Discussion

50.	Sulpha drugs are which type of drugs?
Answer» ANTIMICROBIALS Analgesics Antiseptic Antacids Solution :Antimicrobials

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Sulphur forms for chlorides S_2 Cl_2 and SCl_2. The equivalent mass of sulphur in SCl_2 is 16 . The equivalent mass of sulphur in S_2 Cl_2 is

Sulphur combine with which of the following halogens to form a compound ?

Sulphur disappears when it is boiled in a solution of sodium sulphite. This is due to formation of

Sulphur disappears when boiled with an aqueous solution of sodium sulphite. Why ?

Sulphur dioxide present in the industrial chimney exhaust causes :

Sulphur dioxide may be recognised by its:

Sulphur dioxide causes I. respiratory diseases in human beings. II. Red haze in the traffic III. Irritation of the eyes. The correct option is

Sulphur di oxide, how many times heavier than air?

Sulphur dioxide and sulphite an antioxidants.

Sulphur burns in oxygen to form sulphur dioxide . The properties of sulphur dioxide are:

Sulphur atom of which oxoacid have non bonding electron pair ?

Sulphur-35 (34.96903 amu) emits a beta - particle but no gamma- rays, the product is chlorine -35 (34.96885 amu). The maximum energy emitted by the beta- particle is

Sulphphuryl chloride (SO_(2) CI_(2)) reacts with white phosphorus (P_(4)) to give

Sulphur -35 (34.96903 amu) a beta-particle but no gamma-ray. The product is chlorine - 35 (34.96885 a.m.u). The maximum energy emitted by the beta- particle is

Sulphonation of phenol with conc. H_2SO_4 at373 K gives

Sulphonation of benzene is done by which reagent?

Sulphonation of nitrobenzene gives :

Sulphonation of benzoic acid produces mainly

Sulphonation of benzene is carried out by treating benzene with concentrated sulphuric acid at 330 K in the presence of :

Sulphonamides act as

Sulphir combines with.

Sulphides of cations of analytic group IIB are precipitated by H_2S in:

Sulphide ores of the metals are usually concentrated by froth floatation process. Which of the following sulphide ores offers an exception and is concentrated by chemical leaching ?

Sulphide ores of metals are usually concentrated by froth flotation process. Which one of the following sulphide ores offer an exception and concentrated by chemical leaching?

Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?

Sulphideores ofmetalsare usuallyconcentrated by FrothFloatationprocess. Which one ofthefollowingsulphideoresoffers an exceptionandisconcentratedbychemicalleaching ?

Sulphide ores are generally concentrated by....

Sulphide ores are common for the metals

Sulphide ores are concentrated by froth floatation process. Write the name or formulae of any two sulphide ores of copper.

Sulphide oresare commonfor metals

Sulphide ore is converted to oxide form by using the process _________.

The sulphide ores are generally concentrated by :

Sulphide ore of zinc is concentrated by :

Sulphide ions react with Na_2[Fe(NO)(CN)_5] to form purple coloured compound Na_4[Fe(CN)_5 (NOS)] in the reaction, the oxidation state of iron changes from

Sulphide ore is :

Sulphide ions react with Na_(2)[Fe(NO)(CN)_(5)] to form a purple coloured compound Na_(4)[Fe(CN)_(5)(NOS)], in the reaction the oxidation state of ions

Sulphide ion reacts with [Fe(CN)_(5)NO] to form a purple coloured compound (X). In this reaction oxidation state of iron .

Sulphide ions react with Na_(2)[Fe(NO)(CN)_(5)] from a purple coloured compound Na_(4)[Fe(CN)_(5)(NOS)]. In the reaction, the oxidation state of iron

Sulphide are of zinc//copper is concentrated by

Sulphate of alkaline earth metal which crystallises without water of hydration is that of

Which of the following alkali metal does not form alum:

Sulphate ion has____geometry.

Sulphapyridineis

Sulphate ion has …… geometry

Sulphanilic acid is not soluble in organic solvents. Explain ?

Sulphanilic acid although has acidic as well as basic group, it is soluble in alkali but insoluble in mineral acid. Sulphanilic acid is not soluble in organic solvents.

Sulphan' is

Sulphaguanidine is used for :

Sulpha drugs are which type of drugs?