1 |
The pH of 10-3 mole dm-3 of an aqueous solution of H2SO4 is. |
- A. 3.0
- B. 2.7
- C. 2.0
- D. 1.5
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2 |
For which system does the equilibrium constant K<sub>c</sub>has units of (concentration)<sup>-1</sup> |
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3 |
The number of moles of acid or base required by one dm<sup>3</sup>of buffer to alter its pH by one unit is called |
- A. Buffer efficiency
- B. Buffer capacity
- C. Buffer action
- D. None
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4 |
Catalyst used in preparation of NH3 from N2 and H2 is. |
- A. Ni
- B. Fe
- C. Pt
- D. V2O5
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5 |
The sum of pH and pOH is |
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6 |
The pH of 10<sup>-3</sup>mol dm<sup>-3</sup>of an aqueous solution of H<sub>2</sub>SO<sub>4</sub>is |
- A. 3.0
- B. 2.7
- C. 2.0
- D. 1.5
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7 |
Which acid has less value of pKa. |
- A. CH3COOH
- B. H2S
- C. H2CO3
- D. HCl
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8 |
Kw for water at 0 oc is 0.1 x 10<sup>-34</sup> and at 100 <sup>o</sup>C 7.5 x 10<sup>-14</sup>, How many times dissociation of water increase from 0 <sup>o</sup>Cto 100 <sup>o</sup>C |
- A. 7.5 times
- B. 50 times
- C. 75 times
- D. 100 times
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9 |
When concentration of one product is removed at equilibrium stage, in which direction it moves to reestablish equilibrium. |
- A. Forward
- B. Reverse
- C. Neither forward nor reverse
- D. Equally move in both direction
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10 |
The unit of Kc for the reaction N2 +O2 = 2NO will be |
- A. mol dm-3
- B. mol-1 dm+3
- C. mol-2 dm+6
- D. No units
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