52671 + Interview Questions in Chemistry in Class 11

1.	{:("List - I(compound)","List - II (form of water)"),((1)CuSO_(4).5H_(2),"(A) Hydrogen bonded water"),((2)BaCl_(2).2H_(2)O,"(B) Interstitial water"),((3)CrCl_(3).6H_(2)O,"(C) Coordinated water"):} Correct match is
Answer» A-1 B-2 C-3 A-2 B-1 C-3 A-3 B-2 C-1 A-1 B-3 C-2 Answer :A

Discussion

2.	{:(List-I , List-II ),("A) Freous ","1) Rise in temperature of earthssurface "),("B) Ozone","2) Forms holes in ozones layer "),("C) Carbon dioxide ","3) Protects life from UV raidation "),("D) Sulphurdioxide ","4) Increase in fluoride ion concentration "),("","5) Acid rain "):} The correct match is
Answer» `{:(A,B,C,D),(2,3,1,5):}` `{:(A,B,C,D),(3,4,5,2):}` `{:(A,B,C,D),(1,3,4,2):}` `{:(A,B,C,D),(4,2,1,3):}` SOLUTION :`{:(A,B,C,D),(4,2,1,3):}`

Discussion

3.	{:(,"List I ( Equations)",,"List II( Type of Processes)"),((A),K_(p) gt Q ,(p),"Non-spontaneous"),((B ),DeltaG^(@) lt RT ln Q,(q ),"Equilibrium "),((C),K_(p) =Q ,(r),"Spontaneous and endothermic "),((D),T gt (DeltaH)/( DeltaS),(s),"Spontaneous"):} (a) A-p,B-q,C-r,D-s(b) A-r,B-s,C-q,D-p(c ) A-s,B-p,C-q,D-r(d) A-q,B-p,C-s,D-r
Answer» Solution :(A) `K_(p) gt Q` or`Q lt K_(p0` means that the reaction will PROCEED in the forward DIRECTION, i.e., reaction is SPONTANEOUS .Hence, `Ararr(s)` (B)`DeltaG= DeltaG^(@) + RT ln Q` At equilibrium , `DeltaG=0, Q=K`. Hence, `DeltaG^(@) = - RT ln K` `:. DeltaG^(@) = - RT ln K( i.e., DeltaG^(@)0 + RT ln Q` When `DeltaG^(@)lt RT ln Q, Delta G` is `+ve`. Therefore, forward reaction is non-spontaneous. Hence,`B rarr (p)` ,brgt (C ) `K_(p) = Q` means that the reaction is in equilibrium . Hence, `C rarr (q)`. (D ) `T gt(DELTAH)/(DeltaS)` means `T DeltaS gt DeltaH ` . As`DeltaG = DeltaH-T DeltaS` Hence,reaction is spontaneous, i.e.,`DeltaG ` is -ve only when `DeltaH` is `+ve` . Hence, `D rarr( r )`.

Discussion

4.	{:("List - I(Freezing of water) ","List - II "),("A) Water at - "10^@C ,"I) "DeltaG = 0),("B) Water at "0^@C ,"II) "DeltaG + Ve),("C) Water at "+ 10^@C ,"III) "DeltaG - Ve):} The correct match is
Answer» `{:(A,B,C),(II,I,III):}` `{:(A,B,C),(III,I,II):}` `{:(A,B,C),(I,II,III):}` `{:(A,B,C),(III,II,I):}` ANSWER :A

Discussion

5.	List-I A)TLV B)COD C)DO D)B0D List-II 1) Oxygen required to oxidiseorganic substance present in polluted water. 2) Oxygen used by microoriganisms present in water for S days. 3) Oxygen present in water in dissolved state. 4) Permissible level of pollutant that can be present in amine. 5) Oxygen that is present in atmosphere. The correct match is
Answer» `{:(A,B,C,D),(2,3,5,1):}` `{:(A,B,C,D),(3,4,2,5):}` `{:(A,B,C,D),(4,1,3,2):}` `{:(A,B,C,D),(1,2,4,3):}` ANSWER :C

Discussion

6.	List-I A) Green house effect B)Acidrain C) Depiction of ozone layer D) Photo chemical smog List-II 1) Cause skincancer, cataract 2) Corrodes marble,painted surraces. 3) Melting of polar ice caps 4) Cause irritation of eyes and mucous membrane. 5) Causes headache and decreased vision. The correct match is
Answer» `{:(A,B,C,D),(2,3,4,5)` `{:(A,B,C,D),(3,2,1,4):}` `{:(A,B,C,D),(1,3,2,5):}` `{:(A,B,C,D),(4,2,3,1):}` ANSWER :B

Discussion

7.	List gases which are responsible for greenhouse effect.
Answer» Solution :Greenhouse gases are as FOLLOWS: (1) CARBON dioxide `(CO_2)` (2) methane `(CH_4)` (3) water vapour `(H_2 O)` (4) nitrous oxide (NO) (5) ozone `(O_3)` (6) chlorofluorocarbons (CFCS)

Discussion

8.	List down the applications of equilibrium constant.
Answer» Solution :(i) PREDICT the direction in which the net reaction will take place (ii) Predict the extent of the reaction and (iii) Calcukate the equilibrium CONCENTRATIONS of the reactants and PRODUCTS.

Discussion

9.	{:("LIST - 1","LIST - 2"),("(Moleules)","(Empirical formula)"),("A) Glucose","1) "BNH_(2)),("B) Oxalic acid","2) "CH_(2)O),("C) Inorganic Benzene","3) "CH),("C) Inorganic Benzene","4) "CHO_(2)),("D) Oxygenated water","4) "CHO_(2)),(,"5) "HO):} The correct match is
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(3,5,2,4):}` `{:(ul(A),ul(B),ul(C),ul(D)),(2,4,1,5):}` `{:(ul(A),ul(B),ul(C),ul(D)),(1,3,2,4):}` `{:(ul(A),ul(B),ul(C),ul(D)),(4,2,1,3):}` ANSWER :B

Discussion

10.	{:("List - 1","List - 2"),("(Reagents)","(uses)"),("A) Sodalime","1) Dehalogenation"),("B) Alcoholic KOH","2) Dehydrogenation"),("C) Zinc dust","3) Dehydration"),("D) "Al_(2)O_(3)//350^(@)C,"4) Dehydrohalogenation"),("E) "Cu//300^(@)C,"5) Decarboxylation"):} The correct match is
Answer» a)`{:("A","B","C","D","E"),(5,4,1,3,2):}` b)`{:("A","B","C","D","E"),(3,4,1,2,3):}` c)`{:("A","B","C","D","E"),(5,2,1,4,3):}` d)`{:("A","B","C","D","E"),(5,1,2,3,4):}` ANSWER :A

Discussion

11.	{:("LIST - 1","LIST - 2"),(,"(Charge of 1 mole ions)"),("A) Azide ion","1) "4xx" 96,500C"),("B) Aluminate ion","2) "2xx"96,500C"),("C) Ferrocyanide ion","3) "5xx"96,500C"),("D) Dichromate ion","4) 96,500C"),(,"5) "3xx"96,500C"):} The correct match is
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(1,4,3,2):}` `{:(ul(A),ul(B),ul(C),ul(D)),(4,3,5,2):}` `{:(ul(A),ul(B),ul(C),ul(D)),(5,2,4,1):}` `{:(ul(A),ul(B),ul(C),ul(D)),(4,5,1,2):}` ANSWER :D

Discussion

12.	{:("LIST - 1","LIST - 2"),("A) "NH_(3),"1) Oxidant"),("B) "KMnO_(4),"2) Both oxidant and reductant"),("C) "SO_(2),"3) Neither oxidant nor reductant"),("D) "He,"4) Reductant"),(,"5) Dehydrating agent"):} The correct match is
Answer» A-4,B-3,C-1,D-5 A-2,B-4,C-1,D-3 A-4,B-1,C-2,D-3 A-3,B-2,C-1,D-4 Answer :C

Discussion

13.	{:("List-1","List-2"),((A)"Cu Zn from chromium plating industry ",(I)"Eutrophication "),((B)"Phosphate Nitrates sulphate ",(II)"pH of water changes and toxic to aquatic animals"),((C)"Fluorides",(III)"Consumes dissolved oxygen"),((D)"Cyanides" H_(2)S CO_(2)"Nitrogen oxides",(IV)"Bones and teeth are affected"),(,(V)"Affects human health and aquatic animals"):} The correct match is
Answer» `{:(A,B,C,D),(I,IV,III,V):}` `{:(A,B,C,D),(V,I,IV,II):}` `{:(A,B,C,D),(II,III,V,IV):}` `{:(A,B,C,D),(I,II,III,IV):}` ANSWER :B

Discussion

14.	{:("LIST - 1","LIST - 2"),("A) "MnO_(4)^(-)rarrMn^(2+),"1) 2 "H^(+)" ions are required"),("B) "NH_(2)^(-)rarrNO_(2)^(-),"2) 3 "H^(+)" ions are required"),("C) "CN^(-)rarrCNO^(-),"3) 8 "H^(+)" ions are required"),("D) "Cr(OH)_(3)rarrCr^(3+),"4) 4 "H^(+)" ions are required"),(,"5) 6 "H^(+)" ions are required"):} The correct match is
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(5,4,2,3):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,4,1,5):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,5,1,2):}` `{:(ul(A),ul(B),ul(C),ul(D)),(5,2,3,5):}` ANSWER :C

Discussion

15.	{:("LIST - 1","LIST - 2"),("A) "Cr_(2)O_(7)^(-2)rarrCr^(3+),"1) 2 electrons are involved"),("B) "C_(2)O_(4)^(2-)rarrCO_(2),"2) 1 electron is involved"),("C) "ClO^(-)rarrClO_(3)^(-),"3) 5 electrons are involved"),("D) "MnO_(4)^(-)rarrMnO_(4)^(2-),"4) 4 electrons are involved"),(,"5) 6 electrons are involved"):} The correct match is
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(5,1,4,2):}` `{:(ul(A),ul(B),ul(C),ul(D)),(2,5,3,4):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,4,2,1):}` `{:(ul(A),ul(B),ul(C),ul(D)),(1,2,3,4):}` ANSWER :A

Discussion

16.	{:("LIST - 1","LIST - 2"),("A) "Hp > HR,"1) Exothermic"),("B) "PDeltaV,"2 ) Total heat content"),("C) "E + PV ,"3) "DeltaH "is positive"),("D) "HR > Hp ,"4) Zero at constant volume"):}The correct match is
Answer» `{:(A,B,C,D),(3,4,2,1):}` `{:(A,B,C,D),(2,3,1,4):}` `{:(A,B,C,D),(1,3,4,2):}` `{:(A,B,C,D),(1,3,4,2):}` ANSWER :A

Discussion

17.	{:("LIST - 1","LIST - 2"),("A) "C_(2)H_(6),"1) 90% of carbon"),("B) "C_(2)H_(6),"2) 75% of carbon"),("C) "C_(2)H_(4),"3) 80% of carbon"),("D) "C_(3)H_(4),"4) 85.7% of carbon"),(,"5) 60% of carbon"):} The correct match is
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(2,3,4,1):}` `{:(ul(A),ul(B),ul(C),ul(D)),(5,1,2,4):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,2,4,1):}` `{:(ul(A),ul(B),ul(C),ul(D)),(2,1,5,3):}` ANSWER :A

Discussion

18.	{:("List - 1","List - 2"),("A) Baeyer's reagent","1)"Pd//BaSO_(4^(-))"Quinoline"),("B) Lindlar's catalyst","2) Ammonical silver nitrate"),("C) Tollen's reagent","3) Alkaline permanganate"),("D) Wurtz reaction","4) Na,dry ether"),(,"5)"Br_(2)" in "C Cl_(4)):} The correct match is
Answer» `{:(ULA,ULB,ULC,ULD),(3,1,5,2):}` `{:(ulA,ulB,ulC,ulD),(2,1,5,4):}` `{:(ulA,ulB,ulC,ulD),(5,2,1,3):}` `{:(ulA,ulB,ulC,ulD),(3,1,2,4):}` ANSWER :D

Discussion

19.	{:("LIST - 1","LIST - 2"),("(Oxidation state)","(Substance)"),("A) + 3","1) Nitrogen"),("B) + 1","2) Nitrous oxide"),("C) 0","3) Nitrate ion"),("D) + 5","4) Hydroxylamine"),(,"5) Nitrite ion"):} The correct match is
Answer» `{:(A,B,C,D),(1,4,3,2):}` `{:(A,B,C,D),(5,2,4,3):}` `{:(A,B,C,D),(4,5,3,1):}` `{:(A,B,C,D),(5,2,1,3):}` Solution :1) `NO_2^(-) implies ` NITRITE ion, 2) `:N-=N^(+1)-overset(THETA)O:HARR:underset(..)N=N^(+1)underset(..)overset(..)O:` 3) `N_2` 4) `NO_3 implies` Nitrate ion

Discussion

20.	{:("LIST - 1","LIST - 2"),("A) 22.4 lit. at STP","1) 1 cc of "N_(2)" at STP"),("B) "18.069xx10^(23)" atoms","2) 1 mole"),("C) 108 gm. of silver","3) 4 gm. of Helium at STP"),("D) "2.69xx10^(19)" molecules","4) 2gm. of "H_(2)" at room temperature"),(,"5) 18 gm. of water"):} The correct match
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(3,1,2,4):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,5,2,1):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,5,1,2):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,4,2,1):}` ANSWER :B

Discussion

21.	{:("LIST - 1","LIST - 2 "),((A) R = 8.314 "J.Kelvin-mol"^(-1),"(1) STP conditoins "),((B) V = 22.711 lit ,"(2) SI unit"),((C) P= 1 "bar,"T = 273.15 K,"(3) CGS unit "),((D) R = 0.8314 xx 10^8 "ergs.kelvin"^(-1)mol^(-1) ,"(4) Gram molecular weight"),(,"(5) Gram molar volume at S.T.P "):} The correct match is
Answer» `{:(A,B,C,D),(5,4,3,1):}` `{:(A,B,C,D),(4,3,2,1):}` `{:(A,B,C,D),(3,5,2,4):}` `{:(A,B,C,D),(2,5,1,3):}` ANSWER :D

Discussion

22.	{:("LIST - 1","LIST-2"),("A) 1 mole of","1) 44 g of oxide"),("lead nitratenitrous",),("B) 1 mole of ammonium","2) 28 g of nitrogen"),("nitrate",),("C) 1 mole of","3) 48 g of oxygen"),("ammonium nitrite",),("D) 1 mole of potassium","4) 92 g of "NO_(2)),("chlorate",),(,"5) 46 g of "NO_(2)):} The correct match is
Answer» `{:(UL(A),ul(B),ul(C),ul(D)),(5,1,2,3):}` `{:(ul(A),ul(B),ul(C),ul(D)),(4,2,1,5):}` `{:(ul(A),ul(B),ul(C),ul(D)),(5,4,2,3):}` `{:(ul(A),ul(B),ul(C),ul(D)),(3,2,4,1):}` ANSWER :A

Discussion

23.	{:("LIst-1 Name of the region","List-2"),((A)"Mesosphere",(1)N_(2)", "O_(2)" ,"CO_(2)", "HO_(2)O "Maintenance of beat balance"),((B)"Stratosphere",(2)O_(3)"Prevents the u.v radiations reaching the earth"),((C)"Troposphere ",(3)O_(2)^(+)" ,"NO^(+)"Non- propagation of sound waves"),((D)"Thermosphere",(4)O_(2)^(+)" ," O^(+)", "NO^(+)"Ionization of gases"):} The correct match is
Answer» `{:(A,B,C,D),(3,2,4,1):}` `{:(A,B,C,D),(3,2,1,4):}` `{:(A,B,C,D),(3,1,2,4):}` `{:(A,B,C,D),(1,3,4,2):}` ANSWER :B

Discussion

24.	{:("List -I","List - II"),("A)" sqrt((U_1^2 + U_2^2 + ….+ U_n^2)/(n)),"1) Average velocity"),("B)" (U_1 + U_2 + U_3 + ….+ U_n)/(n),"2) at absolute zero kelvin "),("C)" sqrt(2P//d),"3) RMS velocity of gas molecules "),(,"4) Most probable velocity of gas molecules "):} The correct match is
Answer» A-1, B-2, C- 1 A-2, B-3, C-1 A-3, B-1, C-4 A-4, B-1, C-3 ANSWER :C

Discussion

25.	{:("LIST - 1","LIST - 2"),("A) Law of conservation of Mass","1) "V_(1)//V_(2)=n_(1)//n_(2)),("B) Avogadro's Law","2) "2H_(2(s))+O_(2(g))rarr2H_(2)O_((s))),("C) Gay-Lussac's Law of combining volumes","3) "12g" of "C+32g" of "O_(2)=44gCO_(2)),("D) Law of conservation of energy","5) "H_(2(g))+Cl_(2(g))rarr 2HCl_((g))","DeltaH=-184.6kJ):}
Answer» A-3, B-1, C-4, D-5 A-3, B-1, C-5, D-4 A-3, B-1, C-2, D-5 A-1, B-2, C-4, D-5 Answer :A

Discussion

26.	{:("List -1 " ,"List -2 "),("A) IVA group", "1) Amorphous"),("B) Tridymite","2) Crystalline form of silica"),("C) Lubricant" ,"3)" ns^(2)np^(2)),(,"4) Diamond") :}
Answer» a) `{:(A,B,C,D),(2,4, 3, 5):}` b) `{:(A,B,C,D),(2,3, 5, 4):}` c) `{:(A,B,C,D),(4,2, 3, 5):}` d) `{:(A,B,C,D),(5,3, 2, 4):}` ANSWER :C

Discussion

27.	List -1""List-2 A. NaCl""1."Covalent bond" B. CH_(4)""2."Ionic bond" C. NH_(4)^(**)""3. Metallic bond D. Cu"metal"""4. "Covalent and dative bond" The correct match is
Answer» `{:(A""B""C""D),(2""1""4""3):}` `{:(A""B""C""D),(2""4""1""3):}` `{:(A""B""C""D),(2""3""1""4):}` `{:(A""B""C""D),(1""2""3""4):}` ANSWER :A

Discussion

28.	List -1""List-2 A. Diamond""1.sp^(2) hybridisation B. Graphite""2.sp^(3) hybridisation C. PCl_(5)""3. sp^(3)d hybridisation D. CO_(2) gas""5. sp^(3)d^(2) hybridisation The correct match is
Answer» `{:(A""B""C""D),(3""4""1""2):}` `{:(A""B""C""D),(2""1""3""4):}` `{:(A""B""C""D),(1""2""3""4):}` `{:(A""B""C""D),(2""3""1""2):}` Answer :B

Discussion

29.	{:("LIST - 1 ","LIST - 2 "),((A) 0.0821 "lit. atm mol"^(-1)k^(-1),"(1) Density of mercury "),((B) 1.38 xx 10^(-23) "joule " k^(-1)"molecule"^(-1),"(2) Planck's constant "),((C) 13.6 g cm^(-3),"(3) Gram molar volume "),((D) 22400 ml "of gas ","(4) Gas constant "),("(5) Boltzmann constant",):} The correct match is
Answer» A-5, B - 4, C - 3, D-2 A - 4, B - 3, C -5, D-1 A - 4, B - 3, C - 4, D-2 A - 4, B - 5, C - 1, D-3 Answer :D

Discussion

30.	LIST - 1 (Conversion) A) Benzene to Cyclohexane B) Ethylene to Formaldehyde C) Acetylene toEthylene D) Benzene to Toluene LIST - 2 (Process involved) 1) Hydration 2) Controlled hydrogenation 3) Hydrogenation 4) Ozonolysis 5) Alkylation The correct match is
Answer» `{:(A,B,C,D),(5,4,1,2):}` `{:(A,B,C,D),(1,2,3,4):}` `{:(A,B,C,D),(3,4,2,5):}` `{:(A,B,C,D),(4,3,2,1):}` ANSWER :C

Discussion

31.	Liquifasction occurs in different steps in same phase. - Explain with example.
Answer» Solution :Process of convert gas into liquid or liquid into gas is possible in same phase. e.g. : `A_((g))overset((i))rarr F_((g))overset((ii))rarr G_((g))overset((iii))rarr H_((l))rarr D_((l))` Liquifaction occurs in THREE steps in same phase. Step - (i) (Point A to Point F) : We can move from point A to F vertically by increasing the temperature, PRESSURE ALSO increases. Step - (ii) (Point F to Point G) : We can reach the point F to G by compressing the gas at the constant temperature along this isotherm (Isotherm at `31.1^(@)C`). The pressure will increases. Step - (iii) (Point G to Point D) : we can move vertically down TOWARDS G to D by lowering the temperature. As soon as we cross the point H on the critical isotherm we get liquid. We end up with liquid but in this series of changes we do not pass through two phase region. If liquifaction is done by FIRST critical temperature then substance situated always in one phase.

Discussion

32.	Liquids which decompose at or below their boiling points are purified by.............. .
Answer» ANSWER :DISTILLATION under REDUCED PRESSURE

Discussion

33.	Liquids show viscosity which is due to X) Creation of friction between the layers of the fluid. Y) Inter molecular attraction forces of the liquid. Z) Inter molecular repulsion forces of the liquid.
Answer» Y,Z X, Y X,Z X, Y, Z Solution :Viscosity is due to FRICTION arising from IMF.

Discussion

34.	Liquid water freezes at 273K under external pressure of 1atm . The process is at eruilibrium H_(2)O(l)toH_(2)O(S)at 273 Kand 1atm however , it required to calculate the thermodynamic parameters of the fusion process occurring at same pressure and different temperature . Using the following dat ,answer the questions thaat follow: d_(ice)=0.9gm //cc,d_(H_(2)O(l))=1gm //c"c",1L-atm =101.3 J C_(p)[H_(2)O(s)]=36.4JK^(-1)mol^(-1) C_(p)[H_(2)O(l)]=75.3Jk^(-1)mol^(-1) DeltaH_("fusion")=6008.2mol^(-1).Alldataat 273K. for the fusion process at 263 k, match the conditiions with the pressure . {:(Condition,Temperature ),((a)Spontaneous ,(P)1atm ),((B)At equilibrium ,(Q)1060atm ),((c)"Not feasible",(R)2000atm):}
Answer» (A-Q),(B-R),(C-P) (A-P),(B-Q),(c-R) (A-R),(B-Q),(C-A) (A-P),(B-R),(C-Q) ANSWER :c

Discussion

35.	Liquid water freezes at 273K under external pressure of 1atm . The process is at eruilibrium H_(2)O(l)toH_(2)O(S)at 273 Kand 1atm however , it required to calculate the thermodynamic parameters of the fusion process occurring at same pressure and different temperature . Using the following dat ,answer the questions thaat follow: d_(ice)=0.9gm //cc,d_(H_(2)O(l))=1gm //c"c",1L-atm =101.3 J C_(p)[H_(2)O(s)]=36.4JK^(-1)mol^(-1) C_(p)[H_(2)O(l)]=75.3Jk^(-1)mol^(-1) DeltaH_("fusion")=6008.2mol^(-1).Alldataat 273K. At 1 atm and at different temperature given below Match the conditions and the temperature for the ' fusion ' process. {:(Condition,Temperature ),((a)Spontaneous ,(P)273K ),((B)At equilibrium ,(Q)260K ),((c)"Not feasible",(R)280k):}
Answer» (A-R),(B-P),(C-Q) (A-Q),(B-P),(C-R) (A-R),(B-Q),(C-P) (A-P),(B-Q),(C-R) ANSWER :a

Discussion

36.	Liquid water freezes at 273K under external pressure of 1atm . The process is at eruilibrium H_(2)O(l)toH_(2)O(S)at 273 Kand 1atm however , it required to calculate the thermodynamic parameters of the fusion process occurring at same pressure and different temperature . Using the following dat ,answer the questions thaat follow: d_(ice)=0.9gm //cc,d_(H_(2)O(l))=1gm //c"c",1L-atm =101.3 J C_(p)[H_(2)O(s)]=36.4JK^(-1)mol^(-1) C_(p)[H_(2)O(l)]=75.3Jk^(-1)mol^(-1) DeltaH_("fusion")=6008.2mol^(-1).Alldataat 273K. DeltaS_("fusion")at 263 K and 1atm will be :
Answer» `22.01JK^(-1)MOL^(-1)` `22.84JK^(-1)mol^(-1)` `21.36JK^(-1)mol^(-1)` `20.557JK^(-1) mol_(-1)` ANSWER :d

Discussion

37.	Liquid water is denser than ice due to
Answer» higher surface tension hydrogen bonding van der Waals forces covalent bonding. Solution :DUE to extensive H-bonding WATER is DENSER than ice. Some of the H-bonding breaks when ice is FORMED.

Discussion

38.	Liquid water freezes at 273K under external pressure of 1atm . The process is at eruilibrium H_(2)O(l)toH_(2)O(S)at 273 Kand 1atm however , it required to calculate the thermodynamic parameters of the fusion process occurring at same pressure and different temperature . Using the following dat ,answer the questions thaat follow: d_(ice)=0.9gm //cc,d_(H_(2)O(l))=1gm //c"c",1L-atm =101.3 J C_(p)[H_(2)O(s)]=36.4JK^(-1)mol^(-1) C_(p)[H_(2)O(l)]=75.3Jk^(-1)mol^(-1) DeltaH_("fusion")=6008.2mol^(-1).Alldataat 273K. the value of DeltaH_("fusion") at 263 K and 1 atm will be :
Answer» `+6008.0K"MOLE"^(-1)` `5619.2J "mole"^(-1)` `-5619.2J "mole"^(-1)` `6619.2 "mole"^(-1)` ANSWER :B

Discussion

39.	Liquid water freezes at 273K under external pressure of 1 atm. The process is at equilibrium H_(2)O (l) hArr H_(2)O (s) at 273 K & 1 atm. However it was required to calculate the thermodynamic parameters of the fusion process occuring at same pressure & different temperature.Using the following data, answer the question that follow. d_("ice") = 0.9 gm/cc, d_(H_(2)O(l)) = 1 gm//c, C_(P) [H_(2)O(s))] = 36.4 JK^(-1) mol^(-1) C_(P) [H_(2)O(l)] = 75.3 JK^(-1) mol^(-1), Delta H_("fusion") = 6008.2 J mol^(-1) ''DeltaS_("fusion")'' at 263 K & 1 atm will be
Answer» `22.01 JK^(-1) mol^(-1)` `22.84 JK^(-1) mol^(-1)` `21.36 JK^(-1) mol^(-1)` `20.557 KJ^(-1) mol^(-1)` SOLUTION :`Delta S_("fusion")` at 263K `= (Delta H_("fusion") " at " 263)/(263) = 21.365 Jk^(-1) "MOLE"^(-1)`

Discussion

40.	Liquid water freezes at 273K under external pressure of 1 atm. The process is at equilibrium H_(2)O (l) hArr H_(2)O (s) at 273 K & 1 atm. However it was required to calculate the thermodynamic parameters of the fusion process occuring at same pressure & different temperature.Using the following data, answer the question that follow. d_("ice") = 0.9 gm/cc, d_(H_(2)O(l)) = 1 gm//c, C_(P) [H_(2)O(s))] = 36.4 JK^(-1) mol^(-1) C_(P) [H_(2)O(l)] = 75.3 JK^(-1) mol^(-1), Delta H_("fusion") = 6008.2 J mol^(-1) The value of ''Delta H_("fusion")'' at 263K & 1 atm will be
Answer» `+6008.2 J "mole"^(-1)` `5619.2 J "mole"^(-1)` `-5619.2 J "mole"^(-1)` `6619.2 J "mole"^(-1)` Solution :`Delta H_("FUSION")` at 263and 1 atm will be occurred as follows: `"ice"_(263K) rarr "ice"_(273K) rarr H_(2)O_((L)_(273)) rarr H_(2)O_((l) 263)` So `Delta H_("fusion")` at 263K = `Cp_("ice") xx Delta T + Delta H_("fusion")` at `273- CP_(H_(2)O). Delta T` `= 36.4 xx 10 + 6008.2 - 75.3 xx 10` =5619.2 J/mole

Discussion

41.	Liquid hydrogen is used as.................
Answer» SOLUTION :a ROCKET fuel as well as in SPACE research

Discussion

42.	Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by
Answer» hydolysis oxidation CRACKING distillation under REDUCED pressure Solution :Cracking converts liquid hydrocarbons to GASEOUS hydrocarbons by CLEAVAGE of C-C and C-H BONDS.

Discussion

43.	Liquid hydrocarbon can be converted to a mixture of gaswous hydrocarbon by
Answer» Cracking Hydrolysis Oxidation Distillation Answer :A

Discussion

44.	Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by :
Answer» oxidation cracking DISTILLATION under REDUCED pressure hydrolysis Solution :During craking, HIGHER hydrocarbons (liquid) are converted to LOWER gaseous hydrocarbons.

Discussion

45.	Liquid hydrocarbon is converted to a mixture of gaseous hydrocarbons by
Answer» CRACKING HYDROLYSIS oxidation distillation under REDUCED pressure. Answer :A

Discussion

46.	Liquid can poured one container to another at fixed temperature what is its reason.
Answer» Solution :Molecules of LIQUIDS can move fast one another freely THEREFORE LIQUID can flow can be poured and can assume the SHAPE of container in which these are STORED.

Discussion

47.	Liquid benzene burns in oxygen according to: 2C_(6)H_(6)+15O_(2) rarr 12CO_(2)+6H_(2)O If density of liquid benzene is 0.88g/cc, what volume of O_(2) at STP is needed to complete the combustion of 39 cc of liquid benzene?
Answer» 11.2 litre 74 litre `0.074 m^(3)` `37 dm^(3)` ANSWER :B::C

Discussion

48.	Liquid at higher altitudes boil at a lower temperature.
Answer» ANSWER :1

Discussion

49.	Liquid ammonia ionises to a slight extent. Its self ionisation constant is 10^(-30)at - 50^(@)C, then the numberofamide iona present per1 cc of it at -50^(@)C is
Answer» `6XX 10 ^(12) ` ` 3xx10^(12) ` ` 6xx10 ^(5) ` ` 3xx10^(3) ` Solution :` NH_3 hArr NH_2^(-)+H^(+) ` ` K = [NH_2^(-)][H^(+) ] = 10 ^(-30 ) ` ` [NH_2 ^(-) ] =sqrt( 10^(-30)) = 10 ^(-15) ` `" Moles of " NH_2^(-)= 10 ^(-15) xx (1)/( 1000)= 10 ^(-18) ` ` therefore"No . of" NH_2^(-)" ions "10 ^(-18)xx 6 xx 10 ^(23)= 6 xx 10 ^(-5)`

Discussion

50.	Liquefiedpetroleum gas consists of a mixture of ……….
Answer» SOLUTION :Propane+butane

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

{:("List - I(compound)","List - II (form of water)"),((1)CuSO_(4).5H_(2),"(A) Hydrogen bonded water"),((2)BaCl_(2).2H_(2)O,"(B) Interstitial water"),((3)CrCl_(3).6H_(2)O,"(C) Coordinated water"):} Correct match is

{:(List-I , List-II ),("A) Freous ","1) Rise in temperature of earthssurface "),("B) Ozone","2) Forms holes in ozones layer "),("C) Carbon dioxide ","3) Protects life from UV raidation "),("D) Sulphurdioxide ","4) Increase in fluoride ion concentration "),("","5) Acid rain "):} The correct match is

{:("List - I(Freezing of water) ","List - II "),("A) Water at - "10^@C ,"I) "DeltaG = 0),("B) Water at "0^@C ,"II) "DeltaG + Ve),("C) Water at "+ 10^@C ,"III) "DeltaG - Ve):} The correct match is

List gases which are responsible for greenhouse effect.

List down the applications of equilibrium constant.

{:("LIST - 1","LIST - 2"),("(Moleules)","(Empirical formula)"),("A) Glucose","1) "BNH_(2)),("B) Oxalic acid","2) "CH_(2)O),("C) Inorganic Benzene","3) "CH),("C) Inorganic Benzene","4) "CHO_(2)),("D) Oxygenated water","4) "CHO_(2)),(,"5) "HO):} The correct match is

{:("List - 1","List - 2"),("(Reagents)","(uses)"),("A) Sodalime","1) Dehalogenation"),("B) Alcoholic KOH","2) Dehydrogenation"),("C) Zinc dust","3) Dehydration"),("D) "Al_(2)O_(3)//350^(@)C,"4) Dehydrohalogenation"),("E) "Cu//300^(@)C,"5) Decarboxylation"):} The correct match is

{:("LIST - 1","LIST - 2"),(,"(Charge of 1 mole ions)"),("A) Azide ion","1) "4xx" 96,500C"),("B) Aluminate ion","2) "2xx"96,500C"),("C) Ferrocyanide ion","3) "5xx"96,500C"),("D) Dichromate ion","4) 96,500C"),(,"5) "3xx"96,500C"):} The correct match is

{:("LIST - 1","LIST - 2"),("A) "NH_(3),"1) Oxidant"),("B) "KMnO_(4),"2) Both oxidant and reductant"),("C) "SO_(2),"3) Neither oxidant nor reductant"),("D) "He,"4) Reductant"),(,"5) Dehydrating agent"):} The correct match is

{:("LIST - 1","LIST - 2"),("A) "Hp > HR,"1) Exothermic"),("B) "PDeltaV,"2 ) Total heat content"),("C) "E + PV ,"3) "DeltaH "is positive"),("D) "HR > Hp ,"4) Zero at constant volume"):}The correct match is

{:("LIST - 1","LIST - 2"),("A) "C_(2)H_(6),"1) 90% of carbon"),("B) "C_(2)H_(6),"2) 75% of carbon"),("C) "C_(2)H_(4),"3) 80% of carbon"),("D) "C_(3)H_(4),"4) 85.7% of carbon"),(,"5) 60% of carbon"):} The correct match is

{:("List - 1","List - 2"),("A) Baeyer's reagent","1)"Pd//BaSO_(4^(-))"Quinoline"),("B) Lindlar's catalyst","2) Ammonical silver nitrate"),("C) Tollen's reagent","3) Alkaline permanganate"),("D) Wurtz reaction","4) Na,dry ether"),(,"5)"Br_(2)" in "C Cl_(4)):} The correct match is

{:("LIST - 1","LIST - 2"),("(Oxidation state)","(Substance)"),("A) + 3","1) Nitrogen"),("B) + 1","2) Nitrous oxide"),("C) 0","3) Nitrate ion"),("D) + 5","4) Hydroxylamine"),(,"5) Nitrite ion"):} The correct match is

{:("LIST - 1","LIST - 2"),("A) 22.4 lit. at STP","1) 1 cc of "N_(2)" at STP"),("B) "18.069xx10^(23)" atoms","2) 1 mole"),("C) 108 gm. of silver","3) 4 gm. of Helium at STP"),("D) "2.69xx10^(19)" molecules","4) 2gm. of "H_(2)" at room temperature"),(,"5) 18 gm. of water"):} The correct match

{:("List -I","List - II"),("A)" sqrt((U_1^2 + U_2^2 + ….+ U_n^2)/(n)),"1) Average velocity"),("B)" (U_1 + U_2 + U_3 + ….+ U_n)/(n),"2) at absolute zero kelvin "),("C)" sqrt(2P//d),"3) RMS velocity of gas molecules "),(,"4) Most probable velocity of gas molecules "):} The correct match is

{:("List -1 " ,"List -2 "),("A) IVA group", "1) Amorphous"),("B) Tridymite","2) Crystalline form of silica"),("C) Lubricant" ,"3)" ns^(2)np^(2)),(,"4) Diamond") :}

List -1""List-2 A. NaCl""1."Covalent bond" B. CH_(4)""2."Ionic bond" C. NH_(4)^(**)""3. Metallic bond D. Cu"metal"""4. "Covalent and dative bond" The correct match is

List -1""List-2 A. Diamond""1.sp^(2) hybridisation B. Graphite""2.sp^(3) hybridisation C. PCl_(5)""3. sp^(3)d hybridisation D. CO_(2) gas""5. sp^(3)d^(2) hybridisation The correct match is

LIST - 1 (Conversion) A) Benzene to Cyclohexane B) Ethylene to Formaldehyde C) Acetylene toEthylene D) Benzene to Toluene LIST - 2 (Process involved) 1) Hydration 2) Controlled hydrogenation 3) Hydrogenation 4) Ozonolysis 5) Alkylation The correct match is

Liquifasction occurs in different steps in same phase. - Explain with example.

Liquids which decompose at or below their boiling points are purified by.............. .

Liquids show viscosity which is due to X) Creation of friction between the layers of the fluid. Y) Inter molecular attraction forces of the liquid. Z) Inter molecular repulsion forces of the liquid.

Liquid water is denser than ice due to

Liquid hydrogen is used as.................

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

Liquid hydrocarbon can be converted to a mixture of gaswous hydrocarbon by

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by :

Liquid hydrocarbon is converted to a mixture of gaseous hydrocarbons by

Liquid can poured one container to another at fixed temperature what is its reason.

Liquid benzene burns in oxygen according to: 2C_(6)H_(6)+15O_(2) rarr 12CO_(2)+6H_(2)O If density of liquid benzene is 0.88g/cc, what volume of O_(2) at STP is needed to complete the combustion of 39 cc of liquid benzene?

Liquid at higher altitudes boil at a lower temperature.

Liquid ammonia ionises to a slight extent. Its self ionisation constant is 10^(-30)at - 50^(@)C, then the numberofamide iona present per1 cc of it at -50^(@)C is

Liquefiedpetroleum gas consists of a mixture of ……….