MEDIUM
11th CBSE
IMPORTANT
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Which of the following oxides is amphoteric?

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Important Questions on Some p-Block Elements

MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
Water transported through lead pipes becomes poisonous due to the formation of-
MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
Litharge is chemically-
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
When PbO2 reacts with concentrated HNO3, the gas evolved is 
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
When formic acid is treated with concentrated H2SO4, the gas evolved is :
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
Among the following, the maximum covalent character is shown by the compound:
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
PbCl2 is insoluble in cold water. The addition of HCl increases its solubility due to-
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
The soldiers of Napoleon army while at the Alps during freezing winter suffered a serious problem as regards the tin buttons of their uniforms. White metallic tin buttons got converted into grey powder.This transformation is related to 
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q II
The lead of lead pencils melts at-