MEDIUM
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What is the chemical formula of ozone?

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Important Questions on The p-Block Elements

EASY
Which one of the following is used to remove most of plutonium from spent nuclear fuel?
EASY
In the long form of the periodic table, the valence shell electronic configuration of 5s25p4 corresponds to the element present in:
MEDIUM
Arrange H2O,H2 S and H2Se in order of increasing acidity.
MEDIUM
On electrolysis of dil. sulphuric acid using Platinum Pt electrode, the product obtained at anode will be
EASY
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers?
EASY
The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :
MEDIUM
What is the main product formed when iodine reacts with hypo ?
EASY
Acidity of diprotic acids in aqueous solutions increases in the order:
EASY
The following statements concern elements in the periodic table. Which of the following is true?
EASY
Which of the following protocols did aim for reducing emission of chlorofluorocarbons into the atmosphere?
EASY
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?
EASY

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

MEDIUM
Which of the following statements are correct for hydrides of 16th 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 H2 S to H2Te
IV)ΔfH (Enthalpy of formation) is more negative for H2O and more positive for H2Te
EASY
Which is the correct thermal stability order for H2EE=O, S, Se, Te and Po?