Fill in the blanks:(a) Salts of ________ [normal / transition] elements are generally coloured. From the ions K1+, Cr3+, Fe2+, Ca2+, SO32−, MnO41−, NO31− the ions generally coloured are _________ .(b) The hydroxide which is soluble in excess of NaOH is ________ [Zn(OH)2 / Fe(OH)3 / Fe(OH)2].(c) The salt which will not react with NH4OH solution ________ [ZnCl2 / CuCl2 / NH4Cl / FeCl2].(d) The substance/ s which react/ s with hot conc. NaOH solution and undergoes a neutralization reaction ________ [Al2O3 / Al / Al(OH)3].(e) To distinguish soluble salts of zinc and lead _________ [NaOH / NH4OH] can be used.

Fill in the blanks:(a) Salts of ________ [normal / transition] element

1.	Fill in the blanks:(a) Salts of ________ [normal / transition] elements are generally coloured. From the ions K1+, Cr3+, Fe2+, Ca2+, SO32−, MnO41−, NO31− the ions generally coloured are _________ .(b) The hydroxide which is soluble in excess of NaOH is ________ [Zn(OH)2 / Fe(OH)3 / Fe(OH)2].(c) The salt which will not react with NH4OH solution ________ [ZnCl2 / CuCl2 / NH4Cl / FeCl2].(d) The substance/ s which react/ s with hot conc. NaOH solution and undergoes a neutralization reaction ________ [Al2O3 / Al / Al(OH)3].(e) To distinguish soluble salts of zinc and lead _________ [NaOH / NH4OH] can be used.
Answer» Fill in the blanks: (a) Salts of ________ [normal / transition] elements are generally coloured. From the ions K¹⁺, Cr³⁺, Fe²⁺, Ca²⁺, SO₃²⁻, MnO₄¹⁻, NO₃¹⁻ the ions generally coloured are _________ . (b) The hydroxide which is soluble in excess of NaOH is ________ [Zn(OH)₂ / Fe(OH)₃ / Fe(OH)₂]. (c) The salt which will not react with NH₄OH solution ________ [ZnCl₂ / CuCl₂ / NH₄Cl / FeCl₂]. (d) The substance/ s which react/ s with hot conc. NaOH solution and undergoes a neutralization reaction ________ [Al₂O₃ / Al / Al(OH)₃]. (e) To distinguish soluble salts of zinc and lead _________ [NaOH / NH₄OH] can be used.