94420 + Interview Questions in Chemistry in Class 12

1.	Consider the following statements : (i) In Galvanic cell, Zinc is oxidised to Zn^(2+) ions and Cu^(2+) ions are reduced to copper. (ii) In Galvanic cell, Zn^(2+) ions are reduced to Zinc and copper is oxidised to Cu^(2+) ions. (iii) In Galvanic cell, Zn and copper both get oxidised. Which of the above statement is/are correct ?
Answer» i only ii & III ii only iii only ANSWER :A

Discussion

2.	Consider the following statements : (i) In Galvanic cell, chemical energy is converted into electrical energy. (ii) In electrolytic cell, electrical energy is converted into chemical energy. (iii) In Voltaic cell, electrical energy is converted into chemical energy. Which of the above statement is/are not correct ?
Answer» i & II iii only ii only i only ANSWER :B

Discussion

3.	Consider the following statements: (i) In Daniel cell, when the switch (k) closes the circuit, the electrons flow from Zinc strip to copper strip. (ii) In Daniel cell, when the switch (k) closes the circuit, the electrons flow from copper strip to Zinc strip . (iii) In Daniel cell, when the Switch (k) opens the circuit, the electrons flow from Zinc to copper. Which of the above statement is/are correct?
Answer» i only ii & III ii only iii only ANSWER :A

Discussion

4.	Consider the following statements: (i) In – COOH group, the centre carbon atom and both the oxygen atoms are in sp^3hybridisation. (ii) RCOOH can be represented as a resonance hybrid of two canonical structures. (iii) Carboxylic carbon is less electrophilic than carbonyl carbon because of the reasonance structure. Which of the above statement is/are correct?
Answer» (i) only (III) only (II) & (iii) (ii) only Solution :(ii) & (iii)

Discussion

5.	Consider the following statements: (i) In chemisorption, heat of adsorption is high (ii) Monolayer of the adsorbate is formed during chemisorption (iii) Physisorption increases with increase in temperature. Which of the above statement is / are not correct?
Answer» i & ii III only ii only i only Solution :iii only

Discussion

6.	Consider the following statements. (i) In 3d series, the middle element Mn has +2 to +7 oxidation states. (ii) The oxidation state of Ru and Os is +8. (iii) Scandium has six different oxidation states. Which of the above statements is/ are not correct?
Answer» i and ii ii only i only III only Solution :iii only

Discussion

7.	Consider the following statements. (i) Higher the concentration , slower is the possibility for collision and rate also slower (ii) Increase in surface are a of reactant leads to more collisions per second (iii) Gas phase reactions are slower as compared to solid or liquid reactants Which of the above statement is/ are not correct ?
Answer» (II) (i) & (III) (ii) & (iii) (i) & (ii) ANSWER :B

Discussion

8.	Consider the following statements: (i) If the temperature of the electrolytic solution increases, conductance decreases. (ii) Conductivity increases with the decrease in viscosity . (iii) Molar conductance of a solution decreases with increase in dilution. Which of the above statement is l are not correct ?
Answer» i & iii i and iii iii only II only ANSWER :A

Discussion

9.	Consider the following statements: (i) Formaldehyde is a gas at room temperature and acetaldehyde is a volatile liquid. (ii) The oxidation of symmetrical ketones is governed by Popott's rule. (iii) Aliphatic aldehyde react with primary amines in the presence of base gives Schiff's base. Which of the above statement is/are not correct?
Answer» (i) only (II) only (ii) & (III) (i) & (ii) SOLUTION :(ii) & (iii)

Discussion

10.	Consider the following statements: (i) Enzyme catalysed reaction has maximum rate at optimum temperature (ii) Enzyme catalysis is highly specific in nature (iii) Catalytic activity of enzyme is decreased by coenzymes or activators. Which of the above statement is / are not correct?
Answer» iii only i only II only i & ii Solution :iii only

Discussion

11.	Consider the following statements: (i) Enzymes are complex protein molecules with three dimensional structures. (ii) Enzymes catalyse the chemical reaction in living organism. (iii) Enzymes are not specific in catalytic action. Which of the above statement is / are correct?
Answer» III only II & iii i & ii i & iii SOLUTION : i & ii

Discussion

12.	Consider the following statements. (i) For a first order reaction, half life period is independent of initial of concentration. (ii) Photo chemical reaction between H_2 and Cl_2 is azero order reaction. (iii) Acid hydrolysis of an ester is a second order reaction Which of the above statement is/ are correct ?
Answer» (i) only (III) only (i) & (II) (ii) & (iii) ANSWER :C

Discussion

13.	Consider the following statements: (i) Energy can neither be created nor be destroyed but one form of energy can be converted to another form (ii) In batteries, electrical energy is converted to chemical energy. (iii) Electrochemical reactions are redox reactions. Which of the above statement is/are not correct?
Answer» i & II only ii only i only III only ANSWER :B

Discussion

14.	Consider the following statements. (i) Ellingham drawn on a plot by considering the temperature in the x - axis and the standard free energy change for the formation of metal oxide iny - axis. (ii) The resultant plot is straight line. (iii) In the Ellingham diagram, DeltaH as slope and DeltaS as y - intercept. Which of the above statement(s) is/are not correct?
Answer» (i) and (II) (ii) and (III) (ii) only (iii) only Solution :(iii) only

Discussion

15.	Consider the following statements, (i) Diborane contains two centre two electron bond. (ii) In diborane, the boron has sp^(3) hybridised. (iii)Diborane has two terminal B-H bond and four B-H-B bonds. Which of the above statements (s) is/are correct.
Answer» IAND iii ii and iii ionly I and ii Answer :D

Discussion

16.	Consider the following statements. (i) d-block elements composed of 3d series, Sc to Zn (4th period). (ii) 4d series composed of Y to Cd. (iii) 5d series composed of La, Hf to Mercury. (iv) d-block elements composed of 4d series Y to Cd. Which of the above statements is/ are incorrect.
Answer» i and iv i, II and ii iii and iv iv only Solution :i, ii and ii

Discussion

17.	Consider the following statements. (i) Crystalline solids have irregular shape (ii) Generally crystalline solids are anisotropic in nature (iii) Heat of fusion of crystalline solids are not definite at Which of the above statements is /are correct ?
Answer» (i) & (III) (i) only (iii) only (II) only SOLUTION :(ii) only

Discussion

18.	Consider the following statements (i) Complexes of central metal atom such as of Cu^(+), Zn^(2+) are coloured (ii) Most of the transition metal complexes are colourless (iii) Negative CFSE value indicates that low spin complex is favoured Which of the above statements is/are correct ?
Answer» `i` and `II` `III` only `ii` only `i`, `ii` only `iii` ANSWER :B

Discussion

19.	Consider the following statements. (i) Complexes of central metal atom such as Cu^(+), Zn^(2+) are coloured (ii) Most of the transition metal complexes are colourless (iii) Negative CFSE value indicates that low spin complex is favoured Which of the above statements is/are correct?
Answer» i and II III only ii only i, ii only iii Solution :iii only

Discussion

20.	Consider the following statements: (i) Chemical adsorption is an instantaneous process (ii) Multilayer of the adsorbate is formed on the adsorbent (iii) Chemisorption involves the formation of activated complex. Which of the above statement is / are not correct?
Answer» i & II iii only i only ii only Solution :i & ii

Discussion

21.	Consider the following statements: (i) Colloidal solutions are quite stable and are not affected by gravity (ii) Colloids diffuse more readily through membranes (iii) Colloidal solutions show colligative properties Which of the above statement is / are correct?
Answer» i & III II & iii ii only iii only Solution :i & iii

Discussion

22.	Consider the following statements: (i) Carboxylic acids turn red litmus blue. (ii) Carboxylic acids give brisk efferrescence with NaHCO_3(iii) Carboxylic acid is warmed with alcohol and conc. H_2SO_4gives fruity odour ester. Which of the above statement is/are not correct?
Answer» (i) only (ii) only (iii) only (i) & (iii) Solution : CARBOXYLIC ACIDS TURN red litmus blue

Discussion

23.	Considerthe followingstatements (i)Celluloseis a straightchain polysaccharide . (ii) The glucosemolecules in celluloseare linked by beta(1,4)glycosidic bond. (iii) Cotton is almostpure starch. Which ofthe abovestatementis / are correct ?
Answer» ionly II only III only i&ii Answer :D

Discussion

24.	Consider the following statements: (i) Carboxylic acids have higher boiling point than aldehyde and ketone due to the association of carboxylic acid. (ii) Vinegar is 60 to 80% solution of acetic acid in water (iii) Higher carboxylic acids are insoluble in water due to increased hydrophobic interaction of hydrocarbon part. Which of the above statement is/are not correct?
Answer» (iii) only (II) only (i) only (i) & (iii) SOLUTION : VINEGAR is 60 to 80% solution of acetic ACID in water

Discussion

25.	Consider the following statements : (i) Atomic hydrogen is obtained by passing hydrogen through an electric are (ii) Hydrogen gas will not reduce heated aluminium oxide (iii) Finely divided palladium adsorbs large volume of hydrogen gas (iv) Nascent hydrogen is best obtined by reacting Na and C_(2)H_(5)OH Which of the above statements are correct ?
Answer» I,II II,IV I,II,III I,IV Answer :A::C

Discussion

26.	Consider the following statements - (i) At same P, if V vs T graph is draw for sam e mass of the two idea gaes, then the heavier has will have a heighter slope. (ii) Intercept of log V vs T graph should always be posiive. (iii) Graph of V^(2) vs (1)/(T^(2)) for fixes amount of an ideal gas at constant pressure will be a parabola.
Answer» FTF FFT FFF TTF Solution :(i) `M_(1) gt M_(2)` (GAS is HEAVIER) `n_(1) gt n_(2)` `{:(V = n_(1) RT,V = n_(2) RT,),("P","P",),("Slope","Slope",):}` Heavier gas has lower slope (ii) PV = NRT `V = (nR)/(P) T` logV = log `(nR)/(P) +` log T InterceptC = log `(nR)/(P)` (Can be POSTIVE and negative)

Discussion

27.	Consider the following statements - (i) Antiseptics are chemical substances which prevent the growth of microorganisms, (ii) Boric acid in dilute aqueous solution bis weak antiseptic for eyes, (iii) 0.2 percent solution of phenol is disinfectant (iv) Iodine is a powerful antiseptic, The correct statement (s)
Answer» (i) and (II) (i), (ii) and (IV) (i), (ii) and (III) (iii) and (iv) ANSWER :B

Discussion

28.	Consider the following statements. (i) Amorphous solids are isotropic like liquids (ii) Amorphous solids are considered as pseudo solids (iii) Amorphous solids have sharp melting points Which of the above statemetns is/are correct ?
Answer» (i) only (II) only (i) & (ii) (i) & (III) SOLUTION :(i) & (ii)

Discussion

29.	Consider the following statements (I) Antibiotics which kill the micro-organisms are know as bactericidal drugs. (II) Antibiotics which inhibit the growth of micro-organisms are known as bacteriostatic drugs.(III) Penicilin is a board spectrum antibiotic.(II) and (III);(I), (II) and (III);(I) and (II);(I) and (III).
Answer» (II) and (III) (I), (II) and (III) (I) and (II) (I) and (III) ANSWER :C

Discussion

30.	Consider the following statements (i) alpha- sulphur is the only thermodynamically stable allotrophic form. (ii) At 140^(@)C the mono clinic sulphur melts to formmobile pale yellow liquid called gamma- sulphur (iii) Monoclinic sulphur is stable between 96^(@)C-119^(@)C and slowly changes into lambda-sulphur Which of the above statement(s) is/are not correct?
Answer» (i) only (II) only (III) only (ii) and (iii) SOLUTION :(ii) and (iii)

Discussion

31.	Consider the following statements, (i) Alums are more soluble in hot water than in cold water. (ii) Alums are more soluble in cold water than in hot water. (iii) Potash alum is employed as styptic agent to arrest bleeding. Which of the above statement (s) is /are not correct?
Answer» I only II only ii only I,ii and ii Answer :B

Discussion

32.	Consider the following statements (i) All Silicones are hydrophilic in nature. (ii) Silicones are thermal and electrical insulators. (iii) Chemically silicones are highly reactive. Which of the above statement (s) is /are not correct?
Answer» I and II I and III ii and iii ii ANSWER :B

Discussion

33.	Consider the following statements. (i) All ores are minerals but all minerals are not ores. (ii) Bauxite is an ore of aluminium while clay is not. (iii) Extraction of aluminium form clay is profitable one. Which of the above statement(s) is/are not correct?
Answer» (i) only (II) only (III) only (i), (ii) and (iii) SOLUTION :(iii) only

Discussion

34.	Consider the following statements: (i) Adsorption is spontaneous process. (ii) Adsorption is always accompanied by increase in free energy. (iii) Adsorption is an endothermic reaction. Which of the above statement is / are not correct?
Answer» i only II & III ii & i i only Solution :ii & iii

Discussion

35.	Consider the following statements. (i) Addition of vitamins and minerals reduces the mall nutrient. (ii) Flouring agents reduces the aroma of the food. (iii) Antioxidants produce the formation of potentially toxic oxidation products of lipids. Which of the above statement is/are not correct?
Answer» i only II only ii & III i & iii SOLUTION :ii & iii

Discussion

36.	Consider the following statements. (i) A slat bridge is used to eliminate liquid junction potential (ii) The Gibbs free energy change DeltaG is related with electro motive force (E ) as DeltaG = - nFE. (iii) Nernst equation for a single electrode potential is E = E^(@) - (RT)/(nF) ln a_(m^(n^+)) (iv) The efficiency of a hydrogen oxygen fuel cell is 23%. Which of the above statement is l are not correct ?
Answer» i & ii ii & iii iv only i only ANSWER :C

Discussion

37.	Consider the following statements (i) Acetaminophen reduces fever by causing the hypothalamus to override a prostaglandin(ii) opioids relieve pain and produce sleep and are addictive (iii) Aspirin finds useful in the pain of terminal cancer. Which of the above statement is/are not correct?
Answer» i only II only ii & III iii only Solution :iii only

Discussion

38.	Consider the following statements: (i) A solid catalyst will be more effective if it is taken in a finely divided form (ii) A catalyst cannot initiate a reaction (iii) For a chemical reaction, catalyst is needed in very large quantity Which of the above statement is / are not correct?
Answer» i & II ii & iii iii only i & iii Solution :i & ii

Discussion

39.	Consider the following statements: (i) A catalyst needed in very small quantity (ii) A catalyst can initiate a reaction (iii) Catalyst are highly specific in nature Which of the above statement is/are not correct?
Answer» i & III II & iii iii only i only SOLUTION : i only

Discussion

40.	Consider the following statements: (i) A catalyst needed in very small quantity (ii) A catalyst can initiate a reaction (iii) Catalyst are highly specific in nature Which of the above statement is/are not correct?
Answer» `i&III` `II&iii` iii only ii only Solution :ii only

Discussion

41.	Consider the following statements for diatomic gases, the ratio C_(p) //C_(v) is equal to (1) 1.40 ( lower temperature) (2) 1.66 ( moderate temperatre) (3) 1.29 ( higher temperature ) which of the above statements are correct
Answer» <P>1,2 and 3 1 and 2 2 and 3 1 and 3 Solution :`(C_(p))/(C_(v))` ratio for atomic gases is 1.40 at LOWER temperature `&` 1.29 at HIGHER temperature so the anser is 'd'

Discussion

42.	Consider the following statements for micelles, which are correct
Answer» At CMC, several properties of solution of surfactant such as MOLAR conductivity, surface tension and osmotic pressure CHANGE Micelles from ionic surfactants can be FORMED only above a certain TEMPERATURE called the kraft temperature Micelle formation is exothermic Micelles are associated colloids Solution :Above CMC micelles are formed , In micelle `pi` changes, S.T `darr` & VISCOSITY `uarr`

Discussion

43.	Consider the following statements fro monosaccharides (1) They are optically active polyhydroxy carbonyl compounds. (2) fructorse is a ketose sugar and hence it does not give red precipitate with Fehling solution. (3) All monosaccharides show mutarotation. (4) alpha - D - "Glucose" and beta-D-"Glucose" are anomers. Which one of the above statement (s) is/are correct ?
Answer» 1 and 2 1, 2 and 3 1 and 3 1, 2 and 4 Answer :C

Discussion

44.	Consider the following statements and select the correct option using the codes given : (P) [Cr (NH_(3))_)(6)][Cr(CN)_(6)]" and "[Cr(NH_(3))_(4)(CN)_(2)][Cr(NH_(3))(2)(CN)_(4)] are coordination isomers. (Q) [Cr(py)_(2)(H_(2)O)_(2)Cl_(2)]Cl" and "[Cr(py)_(2)(H_(2)O)Cl_(3)]H_(2)O are ligand isomers. (R ) [Pt(NH_(3))_(4)Br_(2)]Cl_(2)" and "[Pt(NH_(3))_(4)Cl_(2)]Br_(2) are linkage isomers. (S) [NiCl_(2)(PPh_(3))_(2)] (tetrahedral) exhibits geometrical isomerism.
Answer» <P>(P) only (P) and (R ) only (Q) and (R ) only (R ) and (S) only Solution :(R ) `to` IONISATION ISOMERS

Discussion

45.	Consider the following statements and pick out the wrong one. (1)The solubility, thermal stability and the basic character of the hydroxides of alkaline earth metals increases fromMg(OH)_2 to Ba(OH)_2 (2)The dehydration of hydrated chlorides, bromides and iodides of Ca,Sr and Ba can be achieved on heating. (3)The chlorides of both beryllium and aluminium are soluble in organic solvents and are strong lewis acids.
Answer» (1) and (2) only (1) and (3) only (1),(2) and (3) only None Solution :(1)The soubility INCREASES down the group because the CHANGE in lattice energy is more as compared to hydration energy.Thermal stability and the basic character both increase donw the group as metallic character increases. (2)It is correct statement. (3)Beryllium and aluminium are diagonally related.Chlorides of both are covalent in nature and thus are soluble in organic solvents. Chlorides of both are electron deficient and thus act as STRONG Lewis acids .

Discussion

46.	Consider the following statements and identify theincorrect statement(s). (i) Decomposition of H_(2)O_(2) is an II order reaction (ii) t_(1//u) is independent of initial concentration of a reaction. (iii) Fractional order reactions are observed depending on their rates. (iv) Rate = k[A]^(p)[B]^(q), p + q= order.
Answer» only (II) both (ii) and (III) only (i) NONE of these ANSWER :C

Discussion

47.	Consider the following statements and arrange in the order of true/false as given in the codes. S_1:The addition of chlorine water drop wise to a solution of a bromide liberate free bromine, which colours the solution orange red. S_2:Chlorine gas bleaches the filter paper moistened with yellow dyestuff, fluorescein. S_3:Nitrogen gas is evolved when a solution of nitrate is boiled with zinc dust and sodium hydroxide solution.
Answer» T T T T F T T F F T T F Solution :`S_1:2Br^(-)+Cl_2toBr_2`(ORANGE RED COLOUR in water) + `2CL^(-)` `S_2`:True statement . `S_3:NO_3+4Zn+7OH^(-)+6H_2O to NH_3uarr + 4[ZN(OH)_4]^(2-)`

Discussion

48.	Consider the following statements and arrange in the order of true/false as given in the codes. S_1:The hydrogen bond in salt, KHF_2 is stronger than that in gasous HF. S_2 :The dipole moment of CH_3F is greater than that of CH_3Cl. S_3:sp^2 hybrid orbitals have equals s and p character. S_4:Two types of bond present in B_2H_6 are covalent and three centre-two electrons bonds.
Answer» <P>TTFF TFFT FFFT F F T T Solution :`S_1:KHF_2,F-H-F , DeltaH~~-212 kJ mol^(-1)`, involves resonance H-F-`hArr` H-F-H HF,F-`H_F` : `DeltaH~~-28.6 kJ mol^(-1)` `S_2: CH_3ClgtCH_3F` due to large charge SEPARATION in`CH_3Cl` as compared to that in `CH_3F` `CH_3F,mu=1.85 D,CH_3Cl, mu=1.87 D` `S_3`: In `sp^2` HYBRID orbitals character is 33.3% and p character is 66.6% `S_4`: Terminal B-H BOND are covalent while bridging B-H bonds are three centre-two ELECTRON bonds.

Discussion

49.	Consider the followingstatements and findout theincorrectstatement (S ) (I ) Paramagneticsubstances arerepelled by magneticfield . (II) . Absence ofunpairedelectrongives rise todiamagneticcharacter. (III) Larger the magneticmomentvaluegreateris theparamagneticcharacter .
Answer» Only I Only II Both (ii) and (III) Both(I ) and (iii) ANSWER :A

Discussion

50.	Consider the following statements and arrange in the order of true/false as given in the codes. The correct order of True/False of the following statements is : S_1:Rate of diffusion and effusion of a gas increases by increasing the pressure and decreasing the temperature. S_2:An ideal gas has vander waal's constant a and b equal to zero. S_3:If an ideal gas is expanded adiabatically against a constant pressure then TV^(gamma-1)=constant
Answer» TTF FFT TTT FFF Solution :1.Rate of diffusion `PROP P/sqrt(T M)A ""{:(PTO"Pressure"),(Ato"Area of hole"),(Tto"Temperature" ),(MTO"Molecular wt."):}}implies"True"` 2.For ideal GAS PV=nRT[a=0,b=0]`implies` True 3.The process is irreversible adiabatic `:. PV^(gamma-1)`=constant

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Consider the following statements: (i) In chemisorption, heat of adsorption is high (ii) Monolayer of the adsorbate is formed during chemisorption (iii) Physisorption increases with increase in temperature. Which of the above statement is / are not correct?

Consider the following statements. (i) In 3d series, the middle element Mn has +2 to +7 oxidation states. (ii) The oxidation state of Ru and Os is +8. (iii) Scandium has six different oxidation states. Which of the above statements is/ are not correct?

Consider the following statements: (i) Enzyme catalysed reaction has maximum rate at optimum temperature (ii) Enzyme catalysis is highly specific in nature (iii) Catalytic activity of enzyme is decreased by coenzymes or activators. Which of the above statement is / are not correct?

Consider the following statements: (i) Enzymes are complex protein molecules with three dimensional structures. (ii) Enzymes catalyse the chemical reaction in living organism. (iii) Enzymes are not specific in catalytic action. Which of the above statement is / are correct?

Consider the following statements, (i) Diborane contains two centre two electron bond. (ii) In diborane, the boron has sp^(3) hybridised. (iii)Diborane has two terminal B-H bond and four B-H-B bonds. Which of the above statements (s) is/are correct.

Consider the following statements. (i) d-block elements composed of 3d series, Sc to Zn (4th period). (ii) 4d series composed of Y to Cd. (iii) 5d series composed of La, Hf to Mercury. (iv) d-block elements composed of 4d series Y to Cd. Which of the above statements is/ are incorrect.

Consider the following statements. (i) Crystalline solids have irregular shape (ii) Generally crystalline solids are anisotropic in nature (iii) Heat of fusion of crystalline solids are not definite at Which of the above statements is /are correct ?

Consider the following statements (i) Complexes of central metal atom such as of Cu^(+), Zn^(2+) are coloured (ii) Most of the transition metal complexes are colourless (iii) Negative CFSE value indicates that low spin complex is favoured Which of the above statements is/are correct ?

Consider the following statements. (i) Complexes of central metal atom such as Cu^(+), Zn^(2+) are coloured (ii) Most of the transition metal complexes are colourless (iii) Negative CFSE value indicates that low spin complex is favoured Which of the above statements is/are correct?

Consider the following statements: (i) Chemical adsorption is an instantaneous process (ii) Multilayer of the adsorbate is formed on the adsorbent (iii) Chemisorption involves the formation of activated complex. Which of the above statement is / are not correct?

Consider the following statements: (i) Colloidal solutions are quite stable and are not affected by gravity (ii) Colloids diffuse more readily through membranes (iii) Colloidal solutions show colligative properties Which of the above statement is / are correct?

Consider the following statements: (i) Carboxylic acids turn red litmus blue. (ii) Carboxylic acids give brisk efferrescence with NaHCO_3(iii) Carboxylic acid is warmed with alcohol and conc. H_2SO_4gives fruity odour ester. Which of the above statement is/are not correct?

Considerthe followingstatements (i)Celluloseis a straightchain polysaccharide . (ii) The glucosemolecules in celluloseare linked by beta(1,4)glycosidic bond. (iii) Cotton is almostpure starch. Which ofthe abovestatementis / are correct ?

Consider the following statements. (i) Amorphous solids are isotropic like liquids (ii) Amorphous solids are considered as pseudo solids (iii) Amorphous solids have sharp melting points Which of the above statemetns is/are correct ?

Consider the following statements, (i) Alums are more soluble in hot water than in cold water. (ii) Alums are more soluble in cold water than in hot water. (iii) Potash alum is employed as styptic agent to arrest bleeding. Which of the above statement (s) is /are not correct?

Consider the following statements (i) All Silicones are hydrophilic in nature. (ii) Silicones are thermal and electrical insulators. (iii) Chemically silicones are highly reactive. Which of the above statement (s) is /are not correct?

Consider the following statements. (i) All ores are minerals but all minerals are not ores. (ii) Bauxite is an ore of aluminium while clay is not. (iii) Extraction of aluminium form clay is profitable one. Which of the above statement(s) is/are not correct?

Consider the following statements: (i) Adsorption is spontaneous process. (ii) Adsorption is always accompanied by increase in free energy. (iii) Adsorption is an endothermic reaction. Which of the above statement is / are not correct?

Consider the following statements. (i) Addition of vitamins and minerals reduces the mall nutrient. (ii) Flouring agents reduces the aroma of the food. (iii) Antioxidants produce the formation of potentially toxic oxidation products of lipids. Which of the above statement is/are not correct?

Consider the following statements (i) Acetaminophen reduces fever by causing the hypothalamus to override a prostaglandin(ii) opioids relieve pain and produce sleep and are addictive (iii) Aspirin finds useful in the pain of terminal cancer. Which of the above statement is/are not correct?

Consider the following statements: (i) A solid catalyst will be more effective if it is taken in a finely divided form (ii) A catalyst cannot initiate a reaction (iii) For a chemical reaction, catalyst is needed in very large quantity Which of the above statement is / are not correct?

Consider the following statements: (i) A catalyst needed in very small quantity (ii) A catalyst can initiate a reaction (iii) Catalyst are highly specific in nature Which of the above statement is/are not correct?

Consider the following statements: (i) A catalyst needed in very small quantity (ii) A catalyst can initiate a reaction (iii) Catalyst are highly specific in nature Which of the above statement is/are not correct?

Consider the following statements for diatomic gases, the ratio C_(p) //C_(v) is equal to (1) 1.40 ( lower temperature) (2) 1.66 ( moderate temperatre) (3) 1.29 ( higher temperature ) which of the above statements are correct

Consider the following statements for micelles, which are correct

Consider the followingstatements and findout theincorrectstatement (S ) (I ) Paramagneticsubstances arerepelled by magneticfield . (II) . Absence ofunpairedelectrongives rise todiamagneticcharacter. (III) Larger the magneticmomentvaluegreateris theparamagneticcharacter .