Strength of halogen acids, HF,HCl,HBr and HI varies in the order

(A) HF>HCl>HBr>HI

(B)HF>HBr>HI>HCl

(C) HBr>HI>HCl>HF

(D) HI>HBr>HCl>HF

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Flourine does not form oxyacids because

(A) It is most electronegative

(B) It is the most powerful oxidising agent

(C) It has vacant d- orbitals

(D) None of these

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Which is correct order of basic strength

(A) OCl->ClO2->ClO3->ClO4-

(B) ClO4->ClO3->ClO2->ClO-

(C) ClO3->ClO4->ClO2->ClO-

(D) None of these

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Which of the following does not form pentoxide

(A) As

(B) Sb

(C) Bi

(D) P

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Which is the correct order order of decreasing boiling point of azeotropic mixtures HX-H2O

(A) HI,HBr,HF,HCl

(B) HI,HCl,HBr,HF

(C) HF,HCl,HBr,HI

(D) HCl,HF,HBr,HI

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F2 reacts with dilute NaOH to give oxygen difluroide of the formula

(A) F2O

(B) OF2

(C) F2O2

(D) F2O3

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Which of the following oxyacids of chlorine is least oxidising in nature

(A) HOCl

(B) HClO2

(C) HClO3

(D) HClO4

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Which of the following is most basic

(A) F-

(B) Cl-

(C) Br-

(D) I-

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Of the hybrides,H2O,H2S,H2Se and H2Te, the one which has the smallest pKa value is

(A) H2O

(B) H2S

(C) H2Se

(D) H2Te

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The shape of ClO3- is

(A) Tetrahedral

(B) Triangular planer

(C) Triangular pyramid

(D) Planer

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