| 1 |
What are the total numbers of periods in the modern periodic table. |
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| 2 |
Which one of the following elements burns in air to form an oxide which, when shaken with water, give a solution with a pH greater than 7. |
- A. Carbon
- B. Magnesium
- C. sulphur
- D. Hydrogen
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| 3 |
In which compound, oxidation state of sulphur is +6 |
- A. H2S
- B. H2SO4
- C. H2SO3
- D. SO3
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| 4 |
In which group of periodic table is the element which has atomic number 14. |
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| 5 |
Across a period from left to right in the periodic table, the melting and boiling point. |
- A. Decrease
- B. Increase
- C. Remain constant
- D. First increase upto the middle of period and then decrease
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| 6 |
What are the total numbers of periods in the modern periodic table |
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| 7 |
The concept of atomic number was introduced by |
- A. Alrazi
- B. Mendeleeve
- C. Moseley
- D. Dobereiner
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| 8 |
Hydrogen resembles in properties with |
- A. IA, IV A and VII A elements
- B. III A, IV A and V A elements
- C. II A, IV A and VI A elements
- D. II A, III A and VII A elements
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| 9 |
Which of the following the highest hydration energy |
- A. Li<sup>+</sup>
- B. Na<sup>+</sup>
- C. K<sup>+</sup>
- D. Mg<sup>++</sup>
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| 10 |
Which one is an incomplete period |
- A. 4th
- B. 5th
- C. 6th
- D. 7th
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