Chemistry

Match List I with List II.

The total number of Mn = O bonds in Mn₂O₇ is________.

Given below are two statements.

Statement I: Iron (III) catalyst, acidified K₂Cr₂O₇ and neutral KMnO₄ have the ability to oxidize I^- to I₂ independently.

Statement II: Magnate ion is paramagnetic in nature and involves pp-pp bonding

In the light of the above statements, choose the most appropriate answer from the options given below.

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

Given below are two statements.

           Statement I: The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.

           Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions.

           In the light of the above statements, choose the correct answer form the options given below.

Given below are two statements.

           Statement I: Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions.

           Statement II: Density of hydrogen peroxide at 298 K is lower than that of D₂O.

           In the light of the above statements, choose the correct answer from the options given below.

Which of the following methods are not used to refine any metal?

           (A). Liquation

           (B). Calcination

           (C). Electrolysis

           (D). Leaching

           (E). Distillation

The incorrect statement is          

(a) The first ionization enthalpy of K is less than that of Na and Li

(b) Xe does not have the lowest first ionization enthalpy in its group

(c) The first ionization enthalpy of element with atomic number 37 is lower than that of the element with atomic number 38.

(d) The first ionization enthalpy of Ga is higher than that of the d-block element with atomic number 30.

Boiling point of a 2% aqueous solution of a non-volatile solute A is equal to the boiling point of 8% aqueous of non-volatile solute B. The relation between molecular weights of A and B is

Given below are two statements. One is labeled as Assertion A and the other is labeled as Reason R.

           Assertion A: Activated charcoal adsorbs SO₂ more efficiency than CH₄.

           Reason R:  Gases with lower critical temperature are readily adsorbed by activated charcoal.

           In the light of the above statements, choose the correct answer from the options given below: