p-Block Elements - 07 (Oxygen Family)

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Q1. Oxygen molecule is *

1 point

diamagnetic with no-unpaired electron(s)

paramagnetic with two unpaired electrons

diamagnetic with two unpaired electrons

paramagnetic with no unpaired electron(s)

Q2. The number of electrons that are paired in oxygen molecule are *

1 point

Q3. On heating KClO3 we get *

1 point

KCl + O3

KCl + O2

KCl + O2 + O3

KClO2 + O2

Q4. Which of the following is not oxidized by O3 ? *

1 point

K2MnO4

KMnO4

FeSO4

Q5. About 20 km above the earth, there is an ozone layer. Which one of the following statements about ozone and ozone layer is true? *

1 point

Ozone has a triatomic linear molecule

It is harmful as it stops useful radiation

It is beneficial to us as it stops U.V radiation

Conversion of O3 to O2 is an endothermic reaction

Q6. Oxygen gas can be prepared from solid KMnO4 by *

1 point

strongly heating the solid

dissolving the solid in dil. H2SO4

treating the solid with H2 gas

dissolving solid in dil. HCl

Q7. Which of the following statements is correct *

1 point

Ozone has no relationship with oxygen

Ozone is a resonance hybrid of oxygen

Ozone is an allotropic modification of oxygen

Ozone is an isomer of oxygen

Q8. Which of the following on thermal decomposition gives oxygen gas ? *

1 point

PbO2

Pb3O4

Ag2O

All of these

Q9. Which of the following oxide is amphoteric ? *

1 point

SiO2

SnO2

CaO

CO2

Q10. Which of the following is an acidic oxide? *

1 point

Mn2O7

Na2O

BaO

N2O

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