Chemistry Past Questions And Answers
Which of the following bond types is intermolecular?
- A. Covalent bond
- B. Hydrogen bond
- C. Ionic bond
- D. Metallic bond
I. Treatment of cancer II. Detection of leakages in water mains III. Detection of the ages of ancient tools IV. Preparation of drugs Which combination of the above refers to the uses of radioactive isotopes?
- A. I and III
- B. I and II
- C. I, II and III
- D. I, II, III and IV
Metallic elements usually have ______ structure
- A) Open packed
- B) Limited packet
- C) Slight-packet
- D) close-packet
Which of the following is a common property of non-metals?
- A. Exist as solids at room temperature
- B. Tend to gain electrons in chemical reactions
- C. High thermal conductivity
- D. Readily form cations in chemical reactions
Which of the following tests will completely identify anyone of surphur (VI) oxide, hydrogen, carbon (IV) oxide and nitrogen (II) oxide?
- A. Pass each gas into water and test with blue litmus paper
- B. Pass each gas into lime water
- C. Expose each gas to atmospheric air
- D. Pass each gas to concentrated tetraoxosulphate (IV) acid
A fixed mass of gas has a volume of 92cm3 at 3 oC. When will be its volume at 18 oC if the pressure remains constant
- A. 15.3cm3
- B. 87.3cm3
- C. 552.0cm3
- D. 97.0cm3
The colour of methyl orange in alkaline medium is
- A) yellow
- B) pink
- C) orange
- D) red
Alkanoates are produced from alkanols by
- A) Esterification
- B) Fermentation
- C) Saponification
- D) Oxidation
The major source of oxides of nitrogen is from the burning of Options
- A) coal
- B) wood
- C) fuel
- D) chlorofluorocarbons
In the reaction represented by the equation. 5Fe2+ (aq) + MnO4-(aq) + 8H+ (aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(l) which species is reduced?
- A. Fe2+
- B. MnO4-
- C. H+
- D. Fe3+