An alkane with molecular mass 44 is:

1. CH₄
2. C₃H₈
3. C₄H₁₀
4. C₂H₆

The gas evolved in the diagrammatic set up given below turns calcium hydroxide solution milky. The gas evolved is:

1. CH₄
2. C₂H₆
3. CO₂
4. SO₂

Three different solutions X (sodium chloride solution), Y (acetic acid) and Z (sugar solution) were used for electrolysis by a student. When the circuit was completed, he noticed that the bulb glowed in the electrolytic cell containing:

1. X & Y
2. Y & Z
3. Z & X
4. X, Y & Z

An element X has an electronic configuration 2, 2. The compound formed when X combines with oxygen is most likely to be:

1. a compound with a low melting point.
2. a gas that dissolves in water to form an electrolyte.
3. a good conductor in both solid and molten state.
4. an ionic solid.