| 1 |
According to Lewis concept a base is a substance which can donate. |
- A. Proton
- B. Electron pair
- C. Neutron
- D. Electron
|
| 2 |
Lactic acid founds in: |
- A. Citrus fruits
- B. Sour milk
- C. Rancid Butter
- D. Apple
|
| 3 |
Who proved that the presence of hydrogen as the main constituent of all acids. |
- A. Lavoisier
- B. Humphrey Davy
- C. Dalton
- D. Arrhenius
|
| 4 |
A salt always |
- A. Contain ions
- B. Contains water of crystallization
- C. Dissolves in water
- D. Forms crystals which conduct electricity
|
| 5 |
Which one gas is liberated when alkalies react with ammonium salts? |
- A. O<sub>2</sub>
- B. CO<sub>2</sub>
- C. H<sub>2</sub>
- D. NH3
|
| 6 |
Water of crystallization is responsible for. |
- A. Melting points of crystals2
- B. Boiling point of crystal
- C. Shape of crystal
- D. Transition points of crystals
|
| 7 |
When acid react with carbonates and bicarbonates which gas is evolved? |
- A. H2
- B. CO<sub>2</sub>
- C. Cl<sub>2</sub>
- D. N<sub>2</sub>
|
| 8 |
Water is a; |
- A. strong electrolyte
- B. non-electrolyte
- C. weak electrolyte
- D. natural compound
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| 9 |
Acidic solutions have pH value. |
- A. Less than 7
- B. Greater than 7
- C. equal to 7
- D. None of these
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| 10 |
Which one of the following is Lewis base? |
- A. NH<sub>3</sub>
- B. BF<sub>3</sub>
- C. H<sup>+</sup>
- D. AlCl<sub>3</sub>
|