MEDIUM
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What is the chemical formula of ozone?
(a)O3
(b)O2
(c)C O2
(d)N2

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Important Questions on The p-Block Elements
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The shape of is best described as a

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Which one of the following is used to remove most of plutonium from spent nuclear fuel?

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In the long form of the periodic table, the valence shell electronic configuration of corresponds to the element present in:

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Which of the following is wrong statement?

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Arrange and in order of increasing acidity.

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The correct order of electron gain enthalpy is:

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On electrolysis of dil. sulphuric acid using Platinum electrode, the product obtained at anode will be

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Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers?

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The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :

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What is the main product formed when iodine reacts with hypo ?

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The statement that is not true about ozone is :

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Acidity of diprotic acids in aqueous solutions increases in the order:

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Product of the reaction is

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The following statements concern elements in the periodic table. Which of the following is true?

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In resonance hybrid of ozone molecule, bond length is

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Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?

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Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?

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In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

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Which of the following statements are correct for hydrides of group elements?
I) Boiling point is highest for water and lowest for hydrogen sulphide
II) Bond dissociation enthalpy is highest for water and lowest for hydrogen sulphide
III Reducing property increases from to
IV) (Enthalpy of formation) is more negative for and more positive for

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Which is the correct thermal stability order for

