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The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________. (electron affinity, ionization potential, electronegativity)

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The compound that does not have a lone pair of electrons is __________.(water, ammonia, carbon tetrachloride)

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When a metallic oxide is dissolved in water, the solution formed has a high concentration of ____________ ions (H⁺, H₃O⁺, OH^-)

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Potassium sulphite on reacting with hydrochloric acid releases _______gas. Cl₂, SO₂, H₂S)

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The compound formed when ethene reacts with Hydrogen is ________.(CH₄, C₂H₆, C₃H₈)

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A chloride which forms a precipitate that is soluble in excess of
ammonium hydroxide is:

• Calcium chloride

• Ferrous chloride

• Ferric chloride

• Ferric chloride

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If the molecular formula of an organic compound is C₁₀H₁₈ it is:

• alkene

• alkane

• alkyne

• alkyne

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Which of the following is a common characteristic of a covalent compound?

• high melting point

• consists of molecules

• always soluble in water

• always soluble in water

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To increase the pH value of a neutral solution, we should add

• an acid

• an acid salt

• an alkali

• an alkali

10.

Anhydrous iron(III) chloride is prepared by

• direct combination

• simple displacement

• decomposition

• decomposition