94420 + Interview Questions in Chemistry in Class 12 Page 1755 InterviewSolution

87701.	A regular hexagonal crystalline lattice of ice is mostly formed by :
Answer» Ionic BOND HYDROGEN bond COVALENT bond Metallic bond Answer :B

Discussion

87702.	A regular copolymer of ethylene and vinyl chloride contains alternate monomers of each type . What is the weight precent of ethylene in this copolymer.
Answer» Solution :The structre of the copolymer is Mol.WT. of ETHYLENE `=28` Mol.wt.of vinyl CHLORIDE `=62.5` E.F.wt. of copolymer `=28+62.5=90.5` Wt. percent of ethylene is the copolymer `=(28)/(90.5)xx100=30.94`

Discussion

87703.	A refrigerator is used to remove heat from enclosure at 0^(@)C at the rate of 600 watt. If the surroundings temperature is 30^(@)C, calculate the power needed:
Answer» 303 watt 11000 watt 65.9 watt 110 watt Answer :C

Discussion

87704.	(A) Reduction of a metal oxide is easier if the metal formed is in liquidstate at the temperature of reduction . (R)Delta G^(@)for the net reaction, reduction of metal oxide with the reductant, is more-ve when the metal formed is in molten state
Answer» Both (A) and (R) are TRUE and (R) is the CORRECT EXPLANATION of (A) Both (A) and (R) are true and (R) is not the correct explanationof (A) (A) is true but (R) is false Both (A) and (R) are false Answer :A

Discussion

87705.	(A) Reducing sugars undergo mutarotion. (R) During mutarotation, one pure anomer is converted into an equilibrium mixture of two anomers
Answer» Both A & R are true and R is the correct EXPLANATION of A Both A & R are true, but R is not the correct explanation of A A is true, R is false A is false, R is true Answer :A

Discussion

87706.	A reducing agent in a redox reaction undergoes
Answer» a decrease in oxidation number an INCREASE in oxidation number loss of ELECTRONS gain of electrons Solution :A REDUCING AGENT is the ONE which loses electrons.

Discussion

87707.	Areddish substance on heating gives of a capour whichcondenses on the sides of the test tube and the substance turn blue If on cooling water is added to the residue it turm to itsoriginal colour .The substance is
Answer» IODINE crystals Copper sulphate crystals Cobalt CHLORIDE crystals ZINE oxide Solution :It is a preperty of `CoCI_(2)`

Discussion

87708.	A reddish-pink substance on heating gives off a vapour which condences on the sides of the test tube and the substance turns blue. Il on cooling water is added to the residue it turns to its original colour. The substance is :
Answer» IODINE sulphate CRYSTALS Copper sulphate crystals Cobalt CHLORIDE crystals Zinc oxide Answer :C

Discussion

87709.	A reddish brown sol ("containing" Fe^(3+)) is obtained by:
Answer» the addition of small amount of `FeCl_(3)` solution to FRESHLY prepared `Fe(OH)_(3)` precipitate the addition of `Fe(OH)_(3)` to freshly prepared `FeCl_(3)` solution the addition of `NH_(4)OH` to `FeCl_(3)` solution dropwise the addition of `NaOH to `FeCl_(3)` solution dropwise Solution :Reddish BROWN sol is prepared by adding `FeCl_(3)` in `Fe(OH)_(3)` precipitate.

Discussion

87710.	A reddish brown residue in the charcoal cavity test is given by
Answer» `Pb^(2+)` `Bi^(3+)` `Cd^(2+)` `Zn^(2+)` Solution :CDO is the residue. It is reddish BROWN in colour.

Discussion

87711.	A red solid is insoluble in water.However , it becomes solubleif some KI is added to water.Heating the red solidin a test tube results in liberation of someviolet coloured fumesand droplets of a metal appear on the cooler partsof the test tube.The red solid is
Answer» `HgI_(2)` `HgO` `Pb_(3)O_(4)` `(NH_(4))_(2)Cr_(2)O_(7)` SOLUTION :`UNDERSET("RED ppt.")(HgI_(2)) +2KI rarrunderset("Soluble")(K_(2)[HgI_(4)])`

Discussion

87712.	A red solid is insoluble in water.However it becomes soluble if some KI is added to water.Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube.The red solid is :
Answer» `(NH_(4))_(2)Cr_(2)O_(7)` `HgI_(2)` `HgO` `Pb_(3)O_(4)` Solution :`Hgl_(2) darr + 2l^(-) to [Hgl_(4)]^(2-)` (colourless SOLUBLE COMPLEX) `Hgl_(2) overset(DELTA)to Hg+l_(2) uarr` (violet colour)

Discussion

87713.	A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
Answer» `(NH_(4))_(2)Cr_(2)O_(7)` `HgI_(2)` `HGO` `Pb_(3)O_(4)` SOLUTION :`UNDERSET("Red solid")(HgI_(2)+)2KItoK_(2)(HgI_(4))` soluble `HgI_(2)toHg+I_(2)` violet fumes.

Discussion

87714.	A red coloured solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating red solid in a test tube results in the liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
Answer» `(NH_(4))_(2)Cr_(2)O_(7)` `HgI_(2)` HgO `Pb_(3)O_(4)` Solution :The RED coloured solid in `Hgl_(2)` `Hgl_(2)+2Kl to underset("Soluble")(K_(2)Hgl_(4))` `Hgl_(2) overset("heat")toH_(g)+underset("Violet fumes")(I_(2))`

Discussion

87715.	A red coloured mixed oxide (X) on treatment with conc. HNO_(3) gives a compound (Y). (Y) with HCl produces a chloride (Z) which is insoluble in cold water but soluble in hot water, (Z) can also be formed by treating (X) with conc. HCl. Compounds (X), (Y) and (Z) are :
Answer» `Pb_(3)O_(4), PbNO_(3), PbCl_(2)` `Mn_(3)O_(4), MnO_(2), MnCl_(2)` `Fe_(3)O_(4), Fe_(2)O_(3),FeCl_(3)` `Fe_(2)O_(4), FEO, FeCl_(2)` Answer :A

Discussion

87716.	A recemic mixtureof (+-) 2-phenylpropanoic acidon esterification with (+) 2-butanol gives two ester. Mention the stereochemistry of the two esters produced.
Answer» ANSWER :`(##RES_CHM_SIM_E03_002_A01##)`

Discussion

87717.	A recent investigation of the complexation of SCN– with Fe3^+ represented by constant K_1, K_2 and K_3 as 130, 16, and 1.0 respectively. What is the overall formation constant of Fe(SCN)_3 from its component ions, and what is the dissociation constant of Fe(SCN)_3 into its simplest ions on the basis of these data ?
Answer» Answer :`K_(d)=1/(K_(F))=4.8 xx 10^(-4)`

Discussion

87718.	A red blood corpuscles (RBC) is composed of heme group which............. Complex play an important role in carrying oxygen from lungs to tissues.
Answer» ANSWER :`FE^(2+)` PORPHYRIN

Discussion

87719.	A reaserch scholar get a mixture of three product during an experimant with ammonia. In product I only one H of ammonia is replaced by ethyl group and in II two H atoms of ammonia are replaced by ethyl groups and in III alll the H-atoms are replaced by ethyl groups. Which test he should use to distinguish or separate the products :
Answer» Carbyl AMINE test Iodoform test Fehling solution test Hinsberg test Solution :`1^(@), 2^(@)` and `3^(@)` amine MIXTURE can be separated by Hinsberg REAGENT.

Discussion

87720.	A recemic substance is composed of
Answer» 25% D- FORM and 75% L - form 50% D-form and 25% L - form 75% d-form and 25% 1 - form 50% d- form and 50% 1 - form ANSWER :D

Discussion

87721.	A real gas tends to behave more ideally at
Answer» LOW TEMPERATURE and low PRESSURE low temperatureand high pressure high temperature and low pressure high temperature and high pressure. Answer :C

Discussion

87722.	A real gas obeying van der Waals' equation :( P + ( an^(2))/( V^(2))) ( V - b ) = nRTwill closely resemble an ideal gas if
Answer» the CONSTANTS a and B are LARGE a is large and b is amll a is SMALL and b is large a and b are both small. Answer :D

Discussion

87723.	A real gas most closely approaches the behaviour of an ideal gas at :
Answer» 15 atmosphere and 200 K 1 atmosphere and 273 K 0.5 atmosphere and 500 K 15 atmosphere and 500 K Answer :C

Discussion

87724.	A real gas at high pressure occupies under identical conditions :
Answer» More volume than that of an ideal GAS LESS volume than that of an ideal gas Same volume as that of an ideal gas More or less volume than that of an ideal gas depending upon the NATURE of the gas Answer :B

Discussion

87725.	A reagent which reacts differently with CH_(2)O, C_(2)H_(4)O,C_(3)H_(6)O is
Answer» `NH_(2)OH` `C_(6)H_(5)NHNH_(2)` NCN `NH_(3)` SOLUTION :The reagents a , b , c reacts with the CARBONYL COMPOUNDS in a same manner and only `NH_(3)` react differently. Formaldehyde is reacted with ammonia give urotropine. Acetaldehyde reacts ammonia give acetaldehyde AMINE andacetone reacts ammonia give diacetone amine.

Discussion

87726.	A reagent used to test for unsaturation of alkene is
Answer» Conc. `H_2SO_4` Ammoniacal `Cu_2Cl_2` Ammoniacal `AgNO_3` Solution of `Br_2` in `C Cl_4` Solution :Solution of BROMINE in CARBON TETRACHLORIDE is used to test for unsaturation of ALKENE. Red colour of bromine disappears due to the FORMATION of colourless dibromo ethane `(C_2H_4Br_2)`

Discussion

87727.	A reagent used for identifying nickel ion is:
Answer» POTASSIUM ferrocyanide Phenolphthalein Dimethyl glyoxime EDTA Answer :C

Discussion

87728.	A reagent that can separate Fe from Zn is,
Answer» NAOH HCL `H_3S` `NaNO_2` ANSWER :A

Discussion

87729.	A reagent that can detect any of Cu^(2+),Fe^(3+),Zn^(2+) and Cd^(2+) is ______(a)______.
Answer» ANSWER :`K_(4)[FE(CN)_(4)]`

Discussion

87730.	A reagent suitable for the determination of N-terminal residue of a peptide is
Answer» p-toluene SULPHONYL chloride 2,4-dinitrophenyl hydrazine carboxypeptidase 2,4-dinitrofluorobenzene Solution :2,4-dinitrofluorobenzene is called Sanger's reagent. When this reagent reacts with amino group of PEPTIDE chain, it form 2,4-dinitrophenyl DERIVATIVES which on hydrolysis form DNP derivatives of amino ACIDS.

Discussion

87731.	A' reacts by following two parallel reactions to give B& C If half of 'A' goes into reaction I and other half goes to reaction-II . Then , select the correct statement(s) A+N overset(I) to B +L A+N overset(II)to (1)/(2) B+(1)/(2)(C)+L
Answer» B will be always GREATER than C If 2 mole of C are FORMED then total 2 mole of B are also formed If 2 mole of C are formed then total 4 mole of B are also formed If 2 mole of C are formed then total 6 mole of B are also formed Answer :A::D

Discussion

87732.	'A' reacts with C_2H_5Igiving 'B' and Nal. Here 'A' and 'B' respectively are
Answer» `CH_3COONa, CH_2OCH_3` `C_2H_5OC_2H_5, C_2H_5COOC_2H_5` `C_2H_5ONa, C_2H_5OC_2H_5` `C_2H_5OH, C_2H_5OC_2H_5` ANSWER :C

Discussion

87733.	A reacts to form P , A plot of the reciprocal of the concentration of A vs time is a straight line . When the initial concentration of A is 1.0 xx 10^(-2) M , its half-life is found to be 20 min . When initial concentration of A is 3.0 xx 10^(-3) M , the half -life will be
Answer» 20 MIN 40 min 56 min 67 min Solution :`A to P` A plot of 1/[A] vs time is a STRAIGHT line of second order . For second order , `t_(1//2) = (1)/(k[A]_(0))` where , k =rate constant `[A]_(0) ` = initial concentration of A. when , `[A]_(0) = 1 xx 10^(-2)` M , then `t_(1//2) = 20` min `20 = (1)/(k[1 xx 10^(-2)]) implies k = (1)/(20) [ 1 xx 10^(-2)] "" ... (i)` when , `[A]_(0) = 3 xx 10^(-3)` M , then `t_(1//2) = `? `t_(1//2) = (1)/(k[3 xx 10^(-3)])` substituting value of k from equation (i) `t_(1//2) = (1 xx 20 [1 xx 10^(-2)])/([3 xx 10^(-3)]) = 6.66 xx 10` min = 67 min .

Discussion

87734.	A reacton is first order in A and second order in B. (i)Wite the differential rate equation. (ii)How is the rate affected on increasing the concentration of B three times? (iii)How Is the rate affected when the concentration of both A and B are doubled?
Answer» Solution :Reaction:`A+BtoP` Order with respect to A=1 Order with respect to B=2 Total order of reaction =1+2=3 (i)Rate law of REACTON is as follow: `(d[R])/(DT)=k[A]^(1)[B]^(2)` In short r=`k[A]^(1)[B]^(2)` (ii)Effect on rate if the concentration increase by three times: `r_(2)=k[A]^(1)[3B]^(2)` `r_(2)=9 r_(1)` Rate increases by 9 times. (iii)If concentration A and B both double then the rate: Concentration of A=2A Concentration of B=2B So,`r_(3)=k[2A]^(1)[2B]^(2)` `=k2[A]^(2)xx4[B]^(2)` `therefore` The rate becomes 8 times (Note:If only concentration of B is double then rate become double)

Discussion

87735.	(A) Reactivity of primary alcohol is more than secondary alcohols towards sodium metal(R) Primary alcohol is more acidic than secondary alcohol
Answer» Both (A) and (R) are true and (R) is the correct EXPLANATION of (A) Both (A) and (R) are true and (R) is not the correct explanation of (A) (A) is true but (R) is FALSE Both (A) and (R) are false Answer :A

Discussion

87736.	A reaction Xrarr product, completed 50% in 25 min. If concentration of 'X' is doubled, 50% completed in 50 min, the order of the reaction is
Answer» 0 1 2 3 Answer :A

Discussion

87737.	(A) Reactions of higher order are rare (R ) The chances of multimolecular collisions are extremely less.
Answer» Both (A) and (R ) are TRUE and (R ) is the correct EXPLANATION of (A) Both (A) and (R ) are true and (R ) is not the correct explanation of (A) (A) is true but (R ) is false Both (A) and (R ) are false Answer :A

Discussion

87738.	A reaction which is of first order w.r.t reactant A has a rate constnat is 6"min"^(-1). If we start with [A]=0.5"mol"L^(-1) when would [A] reach the value of 0.05 "mol"L^(-1)
Answer» 0.384 min 15 min 20 min 3.84 min Answer :A

Discussion

87739.	A reaction which is first order with respect to A has rate constant 6 "min"^(-1). If we start with [A] = 0.5 "mol L"^(-1), when would [A] reach the value of 0.05 ML^(-1) ?
Answer» SOLUTION :`k=(2.303)/t "log" ([A_0])/([A])` `k=6 "MIN"^(-1), [A]_0 =0.5, [A]=0.05`, t=? `t=(2.303)/6 "log" 0.5/0.05=2.303/6 "log"10` = 0.3838 min

Discussion

87740.	A reaction was found to be second order with respect to the concentration of carbon monoxide . If the concentration of carbon monoxide is doubled with everything else kept the same the rate of reaction will :
Answer» triple INCREASE by a factor of 4 double reamain unchanged Solution :(B) `-(DX)/(dt) prop [CO]^(2) ` DOUBLING the conc .of CO rate will become four TIMES .

Discussion

87741.	A reaction was found to be of second order with respect to concentration of carbon monoxide . If the concentration of carbon monoxide is doubled, the rate of reaction will :
Answer» triple increase by a FACTOR of 4 double remain unchanged Answer :B

Discussion

87742.	A reaction that takes place with the absorption of energy is
Answer» BURNING of a candle RUSTING of iron Electrolysis of water Digestion of food Solution :`H_(2)O_((L))OVERSET("electrolysis")rarrH_(2(g))+(1)/(2)O_(2(g))`.

Discussion

87743.	A reaction that takes place with the absorption of energy is __________ .
Answer» BURNING of a candle Rusting of iron electrolysis of water respiration Answer :C

Discussion

87744.	A reaction taking palce with absorption of energy is:
Answer» BURNING of a candle Electrolysis of water Digestion of food Rusting or iron Answer :B

Discussion

87745.	A reaction takes place in various steps. The rate constant for first, second, third and fifth steps are k1, k2, k3 and k5 respectively. The overall rate constant is is given by: k = k_(2)/k_(1) (k_(1)/k_(2))^(1/2) activation energy are 40,60, 50 and 10 kJ/mol respectively, find the overall energy of activation (kJ/mol).
Answer» SOLUTION :`k = A.e^(-E_(a)//(RT))` `therefore` Effective overall energy of activation `E_(a) = E_(a)(2) -E_(a)(3) + 1/2 E_(a)(1) -1/2 E_(a)(5)` `=60-50 + 1/2 xx 40 - 1/2 xx 10 = 25` kJ/mol

Discussion

87746.	A reaction takes place in various steps. The rate constatn for first, second, third and fifthsteps are k_(1),k_(2),k_(3) and k_(5) respectively The overall rate constant is given by k=(k_(2))/(k_(3))(k_(1)/(k_(5)))^(1//2) If activation energy are 40, 60, 50, and 10 kJ/mol respectively, the overall energy of activation (kJ/mol) is :
Answer» 10 20 25 none of these Answer :C

Discussion

87747.	A reaction takes place in a several sequential steps A,B,C and D. the vlaue of enthalpy change for sequential steps are p,q,r and s respectively. If A and C have equal values of enthalpy change with total enthalpy change is t, then choose the incorrect statement among the following.
Answer» `q=r` `q+r=t-(s+p)` `2q=t-(s+p)` `q+r=p+s` SOLUTION :According to the question, the diagramatic representation of given reaction can be drawn as As given, q=r[Hence, (a) is correct] USING concept of Hess's law `t=p+q+r+s` `therefore q+r=t-(s+p)`[hence (b) is correct] `2q=t-(s+p)`[hence (C) is correct] `[becauseq=r]` but q+r=p+s is INCORRECT because EXACT amount of enthalpy change for each step is not given.

Discussion

87748.	A reaction takes place in 3 steps, the rate constant are K_(1),K_(2),K_(3) and energies of activation are 40, 30 and 20 Kj reaspectively. If overall rate constant K=(K_(1),K_(3))/(K_(2), the overall energy of activation is:
Answer» 10 15 30 60 Answer :C

Discussion

87749.	A reaction S_8 (g) hArr 4S_2 (g) is carried out by taking 2 moles ofS_8(g)and 0.2 mol of S_2(g) in a reaction vessel of 1 litre. Which is (are) correct if K_c=6.30xx10^(-6)
Answer» `K_p =2.55 atm^3` REACTION PROCEEDS in backward direction Reaction proceeds in forward direction Reaction quotient is `8xx 10^(-4)` Answer :A::B::D

Discussion

87750.	A reaction rate is found to depend upon the two concentration terms. The order of the reaction is
Answer» 1 3 2 can't be predicted Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

A regular hexagonal crystalline lattice of ice is mostly formed by :

A regular copolymer of ethylene and vinyl chloride contains alternate monomers of each type . What is the weight precent of ethylene in this copolymer.

A refrigerator is used to remove heat from enclosure at 0^(@)C at the rate of 600 watt. If the surroundings temperature is 30^(@)C, calculate the power needed:

(A) Reduction of a metal oxide is easier if the metal formed is in liquidstate at the temperature of reduction . (R)Delta G^(@)for the net reaction, reduction of metal oxide with the reductant, is more-ve when the metal formed is in molten state

(A) Reducing sugars undergo mutarotion. (R) During mutarotation, one pure anomer is converted into an equilibrium mixture of two anomers

A reducing agent in a redox reaction undergoes

Areddish substance on heating gives of a capour whichcondenses on the sides of the test tube and the substance turn blue If on cooling water is added to the residue it turm to itsoriginal colour .The substance is

A reddish-pink substance on heating gives off a vapour which condences on the sides of the test tube and the substance turns blue. Il on cooling water is added to the residue it turns to its original colour. The substance is :

A reddish brown sol ("containing" Fe^(3+)) is obtained by:

A reddish brown residue in the charcoal cavity test is given by

A red solid is insoluble in water.However , it becomes solubleif some KI is added to water.Heating the red solidin a test tube results in liberation of someviolet coloured fumesand droplets of a metal appear on the cooler partsof the test tube.The red solid is

A red solid is insoluble in water.However it becomes soluble if some KI is added to water.Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube.The red solid is :

A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is

A red coloured solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating red solid in a test tube results in the liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is

A red coloured mixed oxide (X) on treatment with conc. HNO_(3) gives a compound (Y). (Y) with HCl produces a chloride (Z) which is insoluble in cold water but soluble in hot water, (Z) can also be formed by treating (X) with conc. HCl. Compounds (X), (Y) and (Z) are :

A recemic mixtureof (+-) 2-phenylpropanoic acidon esterification with (+) 2-butanol gives two ester. Mention the stereochemistry of the two esters produced.

A red blood corpuscles (RBC) is composed of heme group which............. Complex play an important role in carrying oxygen from lungs to tissues.

A recemic substance is composed of

A real gas tends to behave more ideally at

A real gas obeying van der Waals' equation :( P + ( an^(2))/( V^(2))) ( V - b ) = nRTwill closely resemble an ideal gas if

A real gas most closely approaches the behaviour of an ideal gas at :

A real gas at high pressure occupies under identical conditions :

A reagent which reacts differently with CH_(2)O, C_(2)H_(4)O,C_(3)H_(6)O is

A reagent used to test for unsaturation of alkene is

A reagent used for identifying nickel ion is:

A reagent that can separate Fe from Zn is,

A reagent that can detect any of Cu^(2+),Fe^(3+),Zn^(2+) and Cd^(2+) is ______(a)______.

A reagent suitable for the determination of N-terminal residue of a peptide is

A' reacts by following two parallel reactions to give B& C If half of 'A' goes into reaction I and other half goes to reaction-II . Then , select the correct statement(s) A+N overset(I) to B +L A+N overset(II)to (1)/(2) B+(1)/(2)(C)+L

'A' reacts with C_2H_5Igiving 'B' and Nal. Here 'A' and 'B' respectively are

A reacts to form P , A plot of the reciprocal of the concentration of A vs time is a straight line . When the initial concentration of A is 1.0 xx 10^(-2) M , its half-life is found to be 20 min . When initial concentration of A is 3.0 xx 10^(-3) M , the half -life will be

A reacton is first order in A and second order in B. (i)Wite the differential rate equation. (ii)How is the rate affected on increasing the concentration of B three times? (iii)How Is the rate affected when the concentration of both A and B are doubled?

(A) Reactivity of primary alcohol is more than secondary alcohols towards sodium metal(R) Primary alcohol is more acidic than secondary alcohol

A reaction Xrarr product, completed 50% in 25 min. If concentration of 'X' is doubled, 50% completed in 50 min, the order of the reaction is

(A) Reactions of higher order are rare (R ) The chances of multimolecular collisions are extremely less.

A reaction which is of first order w.r.t reactant A has a rate constnat is 6"min"^(-1). If we start with [A]=0.5"mol"L^(-1) when would [A] reach the value of 0.05 "mol"L^(-1)

A reaction which is first order with respect to A has rate constant 6 "min"^(-1). If we start with [A] = 0.5 "mol L"^(-1), when would [A] reach the value of 0.05 ML^(-1) ?

A reaction was found to be second order with respect to the concentration of carbon monoxide . If the concentration of carbon monoxide is doubled with everything else kept the same the rate of reaction will :

A reaction was found to be of second order with respect to concentration of carbon monoxide . If the concentration of carbon monoxide is doubled, the rate of reaction will :

A reaction that takes place with the absorption of energy is

A reaction that takes place with the absorption of energy is __________ .

A reaction taking palce with absorption of energy is:

A reaction takes place in a several sequential steps A,B,C and D. the vlaue of enthalpy change for sequential steps are p,q,r and s respectively. If A and C have equal values of enthalpy change with total enthalpy change is t, then choose the incorrect statement among the following.

A reaction takes place in 3 steps, the rate constant are K_(1),K_(2),K_(3) and energies of activation are 40, 30 and 20 Kj reaspectively. If overall rate constant K=(K_(1),K_(3))/(K_(2), the overall energy of activation is:

A reaction S_8 (g) hArr 4S_2 (g) is carried out by taking 2 moles ofS_8(g)and 0.2 mol of S_2(g) in a reaction vessel of 1 litre. Which is (are) correct if K_c=6.30xx10^(-6)

A reaction rate is found to depend upon the two concentration terms. The order of the reaction is

A reagent that can detect any of Cu^(2+),Fe^(3+),Zn^(2+) and Cd^(2+) is (a).