Fill in the blanks from the choices given in brackets:

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)

Fill in the blanks from the choices given in brackets:
The compound that does not have a lone pair of electrons is __________.(water, ammonia, carbon tetrachloride)

Fill in the blanks from the choices given in brackets:
When a metallic oxide is dissolved in water, the solution formed has a high concentration of ____________ ions (H⁺, H₃O⁺, OH^-)

Fill in the blanks from the choices given in brackets:
Potassium sulphite on reacting with hydrochloric acid releases _______gas. Cl₂, SO₂, H₂S)

Fill in the blanks from the choices given in brackets:
The compound formed when ethene reacts with Hydrogen is ________.(CH₄, C₂H₆, C₃H₈)

Choose the correct answer from the options given below:
A chloride which forms a precipitate that is soluble in excess of
ammonium hydroxide is:

• Calcium chloride

• Ferrous chloride

• Ferric chloride

• Ferric chloride

Choose the correct answer from the options given below:
If the molecular formula of an organic compound is C₁₀H₁₈ it is:

• alkene

• alkane

• alkyne

• alkyne

Choose the correct answer from the options given below:
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

Choose the correct answer from the options given below:
To increase the pH value of a neutral solution, we should add

• an acid

• an acid salt

• an alkali

• an alkali

Anhydrous iron(III) chloride is prepared by

• direct combination

• simple displacement

• decomposition

• decomposition