2, 3 and 4

1, 2 and 4

1, 2 and 3

1, 2, 3 and 4

Gypsum

slaked lime

caustic soda

baking soda

10.9 M

0.02 M

0.109M

1.09 M

The colour of solution will become colourless.

No change in colour of solution.

The colour of solution will become paler.

The colour of solution will become more intense.

CH₄ (g) + 2O₂(g)  → CO₂ (g) + 2H₂O(l)  

CH₄ (g) + 2O₂(g)  → 2CO₂(g)  + H₂O(l)  

CH₄ + O₂ → CO₂ + H₂O  

CH₄  (g) + O₂(g) → CO₂(g)  + H₂O(l)  

pressure, catalyst

temperature, pressure

temperature

temperature , pressure, and catalyst

3 only

1 only

1 and 2

2 only

Ionic bonding forms when atoms overlap their orbitals to share a pair of electrons.

Ionic bonding occurs when atoms share electrons to achieve a stable electron configuration.

Ionic bonding consists of a pair of electrons donated by only one of the two bonded atoms.

Ionic bonding involves the transfer of electrons from one atom to another, resulting in the formation of ions with opposite charges.