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In an experiment,4 g of M_(2)O_(x) oxide was reduced to 2.8 g of the metal. If the atomic mass of the metal is 56gmol^(-1), the number of O atoms oxide is

In an ________external source of voltage is used to bring above a chemical change.

In an experiment to measure the charge on an electron, the following values ofcharge were found on oil droplets: -1.6 xx 10^(-15), -2.4 xx 10^(-19),-4.0 xx 10^(-19)(in coulomb). What values of electronic charge would be indicated by these results?

In an experiment, the following four gases were produced. 11.2L of which two gases at STP will weigh 14g?

In an experiment of 0.04F was passed through 400 ml of 1 M solution of NaCl. What would be the pH of the solution after the electrolysis?

In an experiment during the analysis of a carbon compound , 145 I of H_(2) was collected at 760 mm Hg pressure and 27^(@)C temperature. The mass of H_(2) is nearly

In an experiment addition of 10ml of 0.05 M BaCl_2 to 20ml of As_2S_3 sol causes coagulation in 1 hr. If the coagulation value of Ba^(+2) ion is x^2 then x = ___?

In an experiment addition of 4.0 mL of 0.005 M BaCl_(2) to 16.0 mL of arsenius sulphide sol just causes complete coagulation in 2 hrs. The flocculating value of the effertive ion is

In an experiment, addition of 4.0 mL of 0.0005 MBaCI_(2)to 16.0 mL of arseniussol justcauses complete coagulationin 2hrs. The flocculatingvalueof the effective ion is

In an experiment, 500ml of 0.5M hydrated oxalic acid is shaken with 5g of activated charocal and filtered. The conc. of filtrate is 0.4 M. If the extent of adsorption (x/m) is 1.26 xx 10^(-x) then x = __?

In an experiment, 2.4 g of iron oxide on reduction with hydrogen yield 1.68 g of iron. In another experiment. 2.9 g of iron oxide give 2.03 g of iron on reduction with hydrogen show that the above data illustrate the law of constant proportions.

In an experiment, 35 mL of a gas was collected at 23^@ C and 720 mm pressure. Find its volume at NTP.

In an experiment, 2.4 g of iron oxide on iron. In another experiment, 2.9 g of iron oxide gave 2.09 g of iron on reduction. Which law is ilustrated from the above data?

Inan experiment , 1804 gof mannitolweredissolvedin 100 g of water . The vapour pressureof waterwaslowered by 0.309 mm Hgfrom 17.535 mm Hg. Calculate the molarmass ofmannitol .

In an experiment, 10 litre of air at 1 atmospheric pressure and 27^(@) Cwerepassed through an alkaline Kl Solution : At the end , the iodine entrapped in a solution reacted with 1.5 ml of 0.01 NNa_(2)S_(2)O_(3) Solution: Calculate the %volume of O_(3) in the sample .

In an experiment , 1.0g CaCO_(3) on heating evolved 224 mL of CO_(2) at NTP. What mass of CaO (calcium oxide) is formed?

In an experiment, 0.04 F was passed through 400 mL of a 1M solution of NaCl. What would be the pH of the solution after the electrolysis ?

In an exothermic reaction, high yield of the product is obtained at

In an exothermic reaction ( H_(r) = enthalpy of reactants and H_(p) = enthalpy of products )

In an exothermic reaction DeltaH is

In an estimation of sulphur by Carius method, 0.160g of the substance gave 0.466g of barium sulphate. The percentage of sulphur in the compound is[At mass of Ba=137, S=32, O=16] :

In an equilibrium reaction for which DeltaG=0, the equlibrium constant K =

In an equilibrium reaction if DeltaG^o = 0 the equilibrium constant, K should be equal to:

In an endothermic reaction, the value of DeltaH is

In an electrolytic cell , one litre of a 1 M aqueous solution of MnO_(4)^(-) is reduced at the cathode . The quantity of electricity required so that the final solution of 0.1 MnO_(4)^(2-) will be

In an electrolytic cell the anode and cathode are respectively represented as :

In an electrolytic cell of Ag|AgNO_3|AgNO_3|Ag,when current is passed the concetration of AgNO_3

In an electrolysis process, 10 electrons could deposit x kg of a univalent metal M. The atomic weight of M is (N is Avogadro constant.)

In an electrolytic cell current flows :

In an electrolchemical cell

In an electrode reaction , no electrode potential is developed when

In an electrochemical process, a salt bridge is used

In an electrochemical cell, the wrong statement is

In an electrochemical cell, if E is the e.m.f. of the cell involving n mole of electrons, then Delta G^(@) is :

In an electrochemical cell ,the electrons flow:

In an electrical field , the particles of a colloidal system move towardscathode . The coagulation of the same sol is studied using K_2SO_4 (i) , Na_3PO_4 (ii) , K_4[Fe(CN)_6] (iii) and NaCl (iv) . Their coagulation power should be ...............

In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K_2SO_4 (i), Na_3 PO_4 (ii), K_4[Fe(CN)_6] (iii) and NaCl (iv) Their coagulating power should be

In an attempt to prepare ferric hydroxide sol by adding small amount of ferric chloride to water, one person got a precipitate of ferric hydroxide. How can you help him to convert Fe(OH)_3 precipitate to Fe(OH)_3 sol?

in an atomic orbital the sign of lobes indicate the

In an atom,the signs of lobes indicate the

In an atom the total number of electrons having quantum number n=4, |m_(e )|=1 and m_(s)= - (1)/(2) is….

In an atom, the maximum number of electron having quantum number n-3,-1lem_(l)le1 and m_(s)=+(1)/(2)

In an atom no two electrons can have the same value for all the quantum numbers. This was proposed by:

In an atom, an electron is moving with a speed of 6200 m/s which the position of an electron can be locates is (h=6.6xx10^(-34)kgm^(2)s^(-1), mass of electron e_(m)=9.1xx10^(-31)kg)

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainty with which the position of the electron can be located is, (h=6.6xx10^(-34)kgm^(2)s^(-1),m_(e)=9.1xx10^(-31)kg)

In an arrangement of type ABABA .... identical atoms of first layer ( A ) and third layer ( A ) are joined by a line passing through their centers . Identify the correct statement .

In the Arrhenius equation, k = A exp^(-Ea//RT), A may be termed as the rate constant at…………. .

In an aqueous solution of volume 500ml when the reaction given below2Ag^(+)+ 2Ag^(+)+Cu hati Cu^(2) +2AgCu^(2+)+2Ag reached at equilibrium the [Cu^(2+] was xM.When 500 ml of wateris further added, at the equilibrium the [Cu^(2+)] will be