A gas was evolved when a sample of gastric juice reacted with sodium trioxocarbonate (IV) . The gas evolved was

• A. NH₃
• B. SO₂
• C. HCI
• D. CO₂

Which one of the following is a hydroscopic compound?

• A) H₂SO₄
• B) NaOH
• C) NaCl
• D) KCl

When air is passed through potash and then pyrogallol, the components are noble gases,

• A. oxygen and carbon (IV) oxide
• B. oxygen and nitrogen
• C. nitrogen and water vapour
• D. water vapour and carbon (IV) oxide

Alkanoates are produced from alkanols by

• A. fermentation
• B. saponification
• C. oxidation
• D. esterification

CHCl₃ + Cl₂ → HCl + CCl₄. The reaction above is an example of?

• A. an addition reaction
• B. a substitution reaction
• C. a chlorination reaction
• D. a condensation reaction

The metallic bond in magnesium is stronger than that in calcium because magnesium has a

• A. larger atomic size.
• B. smaller atomic size
• C. greater number of valence electrons
• D. lower melting point

Equal volumes of CO₂ cnd CO at s.t.p have the same

• A. mass
• B. density
• C. rate of diffusion
• D. number of molecules

Kinetic theory of gases have _____ postulates

• A) 1
• B) 2
• C) 3
• D) 4

The reaction represented by the equation, C₆H₁₂O₆ ---------------> 2C₂H₅OH + 2C0₂

• A. hydrolysis.
• B. oxidation.
• C. reduction
• D. Fermentation

Which of the following metals has the strongest metallic bond?

• A.₁₃Al
• B.₁₉K
• C.₁₂Mg
• D.₁₁Na