when I^- is oxidised by MnO₄^- in an alkaline medium I^- converts into

• IO₃^-

• I₂

• IO₄^-

• IO^-

Which of the following region is coldest?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

In which of the following, the oxidation number of oxygen has been arranged in increasing order?

• BaO₂ < KO₂ < O₃ < OF₂

• OF₂ < KO₂ < BaO₂ <O₃

• BaO₂ < O₃ < OF₂ < KO₂

• KO₂ < OF₂ < O₃ < BaO₂

The normality of 10% (w/v) of acetic acid is

• 1 N

• 1.3 N

• 1.7 N

• 1.9 N

Consider the following solutions, 

A = 0.1 M glucose,

B = 0.05 M NaCl,

C = 0.05 M BaCl₂

D = 0.1 M AlCl₃

Which of the following pairs is isotonic?

• A and B

• A and D

• A and C

• B and C

Which of the following compound is not coloured?

• Na₂CuCl

• Na₂Cd.Cl₄

• FeSO₄

• VI₃

Which of the following oxide is most acidic?

• As₂O₃

• P₂O₅

• Sb₂O₃

• Bi₂O₃

18.

when CO₂ is bubbled through a solution of barium peroxide in water then

• Carbonic acid is formed

• O₂ is released

• H₂O₂

• No reaction occurs

The correct increasing order of ionic radii of the following Ce³⁺, La³⁺, Pm³⁺ and Yb³⁺ is 

• Yb³⁺ < Pm³⁺< Ce³⁺<La³⁺

• Ce³⁺< Yb³⁺<Pm³⁺<La³⁺

• Yb³⁺< Pm³⁺< La³⁺<Ce³⁺

• Pm³⁺ < La³⁺< Ce³⁺ < Yb³⁺

The shape of gaseous SnCl₂ is

• Tetrahedral

• Linear

• Angular

• T-shape