p-Block Elements - 12 (Halogen Family)

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Q1. Cl2 reacts with hot and conc. NaOH to give (Very Important Reaction) *

1 punto

NaClO3

NaClO2

NaClO

NaClO4

Q2. Chlorine is liberated when we heat *

1 punto

K2Cr2O7 + HCl

KMnO4 + NaCl

K2Cr2O7 + MnO2

Pb(NO3)2 + NaNO2

Q3. Which of the following is used in the preparation of chlorine? *

1 punto

Only MnO2

Either MnO2 or KMnO4

Both MnO2 and KMnO4

Only KMnO4

Q4. The reaction of KMnO4 and HCl results in *

1 punto

Oxidation of Mn in KMnO4 and production of Cl2

Reduction of Mn in KMnO4 and production of H2

Oxidation of Mn in KMnO4 and production of H2

Reduction of Mn in KMnO4 and production of Cl2

Q5. Bleaching powder on standing forms mixture of *

1 punto

CaO + HCl

Ca(OH)2 + Cl2

CaCO3 + Cl2

CaO + Cl2

Q6. Hydrochloric acid at 25ºC is *

1 punto

Ionic and liquid

None of these

covalent and liquid

Ionic and gas

Q7. Gaseous HCl is a poor conductor of electricity while its aqueous solution is a good conductor this is because *

1 punto

A gas cannot conduct electricity but a liquid can

HCl ionises in aqueous solution

HCl gas does not obey Ohm’s law, whereas the solution does

H2O is a good conductor of electricity

Q8. Which one is most stable to heat *

1 punto

HClO

HClO3

HClO2

HClO4

Q9. Interhalogen compounds are more reactive than the individual halogen because *

1 punto

they are more ionic

two halogens are present in place of one

their bond energy is less than the bond energy of the halogen molecule

they carry more energy

Q10. Which of the following is not the characteristic of interhalogen compounds ? *

1 punto

They are more reactive than halogens

They are covalent in nature

They are quite unstable but none of them is explosive

They have low boiling points and are highly volatile

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