Chemistry quizz 2

The gas collected by upward displacement of air is

• Hydrogen

• Oxygen

• Ammonia

• Carbon dioxide

When phenolphthalein in dropped in alkali solution .the color changes to

• Colorless

• Red

• Blue

• Pink

When calcium hydroxide is heated with ammonium chloride. The gas obtained is

• Hydrogen

• Carbon dioxide

• Ammonia

• Oxygen

The acid present in vinegar is

• Citric acid

• Tartaric acid

• Acetic acid

• Formic acid

The general formula for alkene is

• CnHn

• CnH2n

• CnH2n-2

• CnH2n+2

Ammonia turns phenolphthalein into pink. The gas is

• Acidic

• Neutral

• Basic

• Soluble in water

Carbon dioxide gas when passed through blue litmus paper ,it turns red. The gas is

• Neutral

• Alkaline

• Acidic

• Milky lime

Molecular formula of caustic soda is

• CaCO3

• KOH

• NaOH

• Ca(OH)2

The first member of homologous series of alkene is

• CH4

• C2H6

• C2H2

• C2H4

Bauxite is the ore of

• Silver

• Gold

• Aluminium

• Copper