EASY
12th ICSE
IMPORTANT
Earn 100

Why does the density of transition elements increase from titanium to copper?

Important Questions on d-and f-Block Elements

EASY
12th ICSE
IMPORTANT
Why is zinc not regarded as a transition element? (atomic number Zn=30).
EASY
12th ICSE
IMPORTANT
Explain why Mn+2 is more stable than Fe+2 towards oxidation to +3 state. 
EASY
12th ICSE
IMPORTANT
Explain why transition elements usually form coloured ions.
MEDIUM
12th ICSE
IMPORTANT
Explain why Zr and Hf exhibit similar properties.
HARD
12th ICSE
IMPORTANT

Complete and balance the following chemical equation:

KMnO4+ KI + H2SO4  _____ + ______ + ______ + _______.

MEDIUM
12th ICSE
IMPORTANT

Complete and balance the following chemical equation:

K2Cr2O7 + H2SO4 + H2S  _____ + ______ + ______ + _______.

EASY
12th ICSE
IMPORTANT

Complete and balance the following chemical equation:

KMnO4 + H2SO4 + FeSO4  _____ + ______ + ______ + _______.

EASY
12th ICSE
IMPORTANT

Complete and balance the following reaction: 

NaCl + MnO2 + H2SO4  _______ + _______ + ________ + _____.