Consider the following statements. Br I.Extraction of gold and silver involves leaching with `CN^-` . Br II. Cast iron is the purest form of commercial iron. Br III. Copper matte contains `Cu_2S` and FeS. The correct statement(s) is/are

Consider the following statements : S_(1) : In extration of iron from haematite ore, the reduction reactions take place only in the lower temperature range in the blast furnace. S_(2) : Calamine in an carbonate ore of zince. S_(3) : The principle ore of aluminium , bauxite , usually contains silica, iron oxides and titanium oxide as impurities. S_(4) : Solidified copper obtained from silica lined conventor ( Bessemer converter ) has blistered appearance due to the evolution of SO_(2) . Which are correct statements?

Consider to following isomers of [Co(NH_(3))_(2)Br_(4)]^(Θ) and answer the questions Select the correct statement .

Consider to following isomers of [Co(NH_(3))_(2)Br_(4)]^(Θ) and answer the questions Select the correct statement .

Consider to following isomers of [Co(NH_(3))_(2)Br_(4)]^(Θ) and answer the questions Select the correct statement .

Read the following statements :- (I) Al has greater affinity than that of Cr, for oxygen (II) Al can be used for reduction of Fe_(2)O_(3) (III) Carbon is used for reduction of copper oxide (CuO) (IV) SnO_(2) can be reduced by carbon Choose the correct set of statement(s)

E^@ values of three metals are listed below. {:(Zn_((aq))^(2+) + 2e^(-) to Zn_((s)),, E^@=-0.76V),(Fe_((aq))^(2+) + 2e^(-) to 2Fe(s) , , E^@=-0.44 V),(Sn_((aq))^(2+)+2e^(-) to Sn_((s)) ,, E^@=-0.14 V) :} Which of the following statements are correct on the basis of the above information ? (i)Zinc will be corroded in preference to iron if zinc coating is broken on the surface. (ii)If iron is coated with tin and the coating is broken on the surface then iron will be corroded . (iii)Zinc is more reactive than iron but tin is less reactive then iron.

Read the following statements w.r.t. biological treatment of sewage. Br a. Involves removal of sewage through sequential filteration. Br b. BOD of waste water is directly proportional to its a polluting potential. Br c. Constant agitation of primary effluent is carried out in large aeration tanks. Identify the incorrect statement(s)

For the reaction 5Br^(-)(aq)+BrO_(3)^(-)(aq)+6H^(+)(aq)rarr 3Br_(2)(aq)+3H_(2)O(l) the reate expression was found to be -(d[BrO^(3-)])/(dt)=k[Br^(-)][H^(+)]^(2)[BrO_(3)^(-)] Which of the following statements is /are correct? I. Doubling the intial concentration of all the reactants will increase the reaction rate by a factor of 8. II. Unit of rate constant of the reaction in a buffer solution is "min"^(-1) III. Doubling the concentration of all the reactants at the same time will increase the reaction rate by a factor of 16 IV. rate of conversion of BrO_(3)^(-) and rate of disappearance of Br^(-) are the same

Consider the following reaction and statements: [Co(NH_(3))_(4)Br_2]^(+)+Br^(-) to [Co(NH_(3))_(3)Br_3]+NH_(3) (I) Two isomers are produced if the reactant complex ion is a cis-isomer. (II) Two isomers are produced if the reactant complex ion is a tran-isomer. (III) Only one isomers is produced if the reactant complex ion is a tran-isomer. (IV) Only one isomers is produced if the reactant complex ion is a cis-isomer. The correct statements are :

Read the following given statements and choose the correct option. Br Statement 1: Corpora quadrigemina is the tract of nerve fibres which connect left and right cerebral hemispheres. Br Statement II Midbrain, pons and medulla form the brain stem