Which of the following statements is not correct?
- AExcept for $Be$ and $Mg$,$s-$block elements form ionic hydrides.
- B$BeH_2, \,MgH_2, \,CuH_2$ and $HgH_2$ are intermediate hydrides.
- C$p-$block elements form covalent hydrides.
- D$d-$ and $f-$block elements form ionic hydrides.
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Statement-$I$: Methane and steam passed over a heated $Ni$ catalyst produces hydrogen gas.
Statement-$II$: Sodium nitrite reacts with $NH_4Cl$ to give $H_2O$,$N_2$ and $NaCl$.
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Statement-$I$: Methane and steam passed over a heated $Ni$ catalyst produces hydrogen gas.
Statement-$II$: Sodium nitrite reacts with $NH_4Cl$ to give $H_2O$,$N_2$ and $NaCl$.
In the light of the above statements,choose the most appropriate answer from the options given below :
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