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In ary halides halogen group is a ortho para director and a deactivatortowardselectrophilic substitution reactionwhy

In aqueous solutions lithium is best reductiant. Why ?

In aqueous solutions lithium is best reductant. Why?

Inaqueous solution, the ionization constants for carbonic acid are K_(1)=4.2xx10^(-7) and K_(2)=4.8xx10^(-11). Select the correct statement for asaturated 0.034 M solution of the carbonic acid.

In aqueous solution of Al_(2)(SO_(4))_(3)concentration ofAl^(+3) is 1.8 M then what is the concentration of SO_(4)^(-2) ?

In aqueous solution, hydrogen perioxide oxidises H_(2)S to

In aqueous alkaline solution, two electron reduction ofHO_2^- gives

In aqueous alkaline solution two electron reduction of HO_(2)^(-) gives

In any subshell, the maximum number of electrons having same value of spin quantum number is

In any fuel, the percentage by volume of iso-octane in a mixture of iso-octane and n-heptane which will knock under same conditions as the fuel being tested, is called

In Antarctica, ozone depletion is due to the formation of the following compound

In Antartica, ozone layer depletion is due to the formation of

In Antarctica ozone depletion is due to the formation of following compound

In another way to soften the hard water is by using a process called ___________

In an oxidation-reduction, MnO_(4)^(-) ion is converted to Mn^(2+), what is the number of equivalents of KMnO_(4) (mol. Wt.=158) present in 250 mL of 0.04 M KMnO_(4) solution ?

In an organic compound, the phosphorus is estimated as:

In an organic compound of molar mass 108 g mol^(-1), H and N atoms are present in 9 : 1 : 3.5 by weight. Molecular formula can be:"1.C_(6)H_(8)N_(2)"2.C_(7)H_(10)N3.C_(5)H_(6)N_(3)4.C_(4)H_(18)N_(3)

In an organic compound containing C and H, the % C is 3 times to that of % H. What is the compound ?

In an organic compound, phosphorus is estimated as ............ .

In an ore theonly oxidizable material in Sn^(2+) This is titrated with a dichromate solution containing 2.5 of K_(2)Cr_(2)O_(7) in 0.50 litre A 0.40 g sample of the ore required 10.0 cm^(3) of titrant to reach equivalenc point calculate the prcentage of tin in the re (k=39.1, Cr = 52 Sn =11.87)

In an octahedral structure, the pair of d-orbitals ind""^(2)sp^(3) hydridiation is

In an isothermal reversible compression of an ideal gas the sign of q, DeltaS and w are respectively

In an irreversible process taking place at constant T and P and in which only pressure- volume work is being done, the change on Gibb's free energy (dG) and changing in entropy (dS), stisfy the criteria

In an irreversible process taking placeat constant T and Pand in which only pressure volume work is being done, the change in Gibbs free energy (dG) and the change in entropy ( dS), satisfy the criteris

In an ionic compound A^+ X^- , the radii of A^+ and X^- ions are 1.0 pm and 2.0 pm respectively. The volume of the unit cell of the crystal AX will be

In an ionic compound A^(+)X^(-) , the radii ofA^(+) and X^(-)ions are 1.0 pm and 2.0 pm rspecitvely . The volume of the unit cell of the crystal AX will be

In an ionic compound A^(+)B^(-) radius ofA^(+) is 88 pm while that ofB(-) is 200 pm. The coordination number ofA^(+)will be ……..

In an insulated container, 1 mole of a liquid of molar volume 100 mL is at 1 bar. If the liquid is steeply taken to 100 bar, the volume of liquid decreases by 1 mL. Find the work done and DeltaH.

In an ionic compound A^+ B^-,radius of A^+ 88 pm while that of B^- is 200 pm. The coordination number A^+ will be ______

In an FCC unit cell a cube is formed by joining the centers of all the tetrahedral voids to generate a new cube. Then the new cube would contain voids as

In an FCC unit cell a cube is formed by joining the centers of all the tetrahedral voids to generate a new cube . Then the new cube contains voids as :

In an experiment 5.0 g of CaCO_(3) on heating gave 2.8 g of CaO and 2.2 g of CO_(2). Show that these results are in accordance to the law of conservation of mass.

In an experiment, 2.847 g of pure MOCl_(3) was allowed to undergo a set of reactions as a result of which all the Cl was converted to AgCl. The weight of AgCl was 7.2g. Find at. Wt of M.

In an experiment 2.65 g of zinc displaced 2.58 g of copper from copper sulphate solution. If equivalent weight of copper is 31.75, calculate that of zinc.

In an experiment, 20 mL of a decinormal HCl solution was added to 15 mL of a decinormal AgNO_(3) solution. AgCl was precipitated out and excess of acid was titrated with N//20 NaOH solution. The volume of NaOH required was :

In an exothermic reaction, heat is evolved and system loses heat to the surroundings . For such system. (i) q_(p) will be negative(ii) Delta_(r)H will be positive (iii) q_(p) will be positive (iv) Delta_(r)H will be negative

In an exothermic reaction, heat is evolved and system loses heat to the surrounding.For such system

In an exothermic reaction, heat is evolvedand system loses heat to the surrounding. For such system.

In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system

In an exeperiment ethyliodide in ehter is allowed to stand over magnesium pieces. Magnesium dissolves and product is formed. Why all the reagents used in the reaction should be dry? Explain.

In an exeperiment ethyliodide in ehter is allowed to stand over magnesium pieces. Magnesium dissolves and product is formed. Name the product and write the equation for the reaction.

In an estimation of sulphur by Carius method, 0.468 of an organic sulphur compound gave 0.668 g of barium sulphate. Find the percentage of sulphur in the compound.

In an estimation od sulphur by carius method, 0.2175 g of a compound gave 0.5825 g of barium sulphate. Calculate the percentage of sulphur in the compound.