Which of the following is not a characteristic property of covalent compounds?
Generally insoluble in organic solvents
Covalent compounds are generally soluble in organic (non-polar) solvents due to similar polarity, so 'generally insoluble in organic solvents' is NOT a characteristic property of covalent compounds -- this statement describes ionic compounds instead.
Ionic compounds generally have high melting points because:
Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2)?
Which one of the following statements is correct?
Which one of the following is the chemical formula of gypsum?
Which one of the following statements about water is not true ?