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Q. No.The basic difference between Mendeleev’s Periodic Law (A) and Modern Periodic Law (B) is:
| 1. | A is based on atomic weights while B is based on atomic numbers. |
| 2. | B is based on atomic weights while A is based on atomic numbers. |
| 3. | A is based on the number of isotopes while B is based on atomic numbers. |
| 4. | A is based on physical properties while B is based on chemical properties. |
Subtopic: Evolution of Periodic Table |
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Level 1: 80%+
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Subtopic: Evolution of Periodic Table |
86%
Level 1: 80%+
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The basic theme of the periodic table is:
| 1. | To classify the elements in a period according to their properties. |
| 2. | To classify the elements in a group according to their ionization enthalpy. |
| 3. | To classify the elements in periods and groups according to their properties. |
| 4. | To classify the elements in periods and groups according to their lustre. |
Subtopic: Evolution of Periodic Table |
87%
Level 1: 80%+
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Eka aluminium and Eka silicon are now known as:
| 1. | Ga and Ge | 2. | Al and Si |
| 3. | Fe and S | 4. | H+ and Si |
Subtopic: Modern Periodic Table & Periodicity |
89%
Level 1: 80%+
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Which of the following pairs consists of metalloid elements?
| 1. | Na and K | 2. | Cu and Al |
| 3. | As and Si | 4. | Ca and Mg |
Subtopic: Modern Periodic Table & Periodicity |
87%
Level 1: 80%+
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All the non-metals in the long form of the periodic table are placed under:
1. s-Block
2. p-Block
3. f-Block
4. d-Block
Subtopic: Modern Periodic Table & Periodicity |
88%
Level 1: 80%+
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The element named after Lawrence Berkeley Laboratory is:
1. Seaborgium
2. Lawrencium
3. Moscovium
4. Hafnium
Subtopic: Modern Periodic Table & Periodicity |
89%
Level 1: 80%+
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Which of the following atomic numbers corresponds to an element that cannot be accommodated in the present long form of the Periodic Table?
1. 107
2. 118
3. 126
4. 102
1. 107
2. 118
3. 126
4. 102
Subtopic: Modern Periodic Table & Periodicity |
90%
Level 1: 80%+
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Among the following elements, identify the one that is not an actinoid :
1. Curium (Z = 96)
2. Californium (Z = 98)
3. Uranium (Z = 92)
4. Terbium (Z = 65)
1. Curium (Z = 96)
2. Californium (Z = 98)
3. Uranium (Z = 92)
4. Terbium (Z = 65)
Subtopic: Modern Periodic Table & Periodicity |
87%
Level 1: 80%+
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The elements with atomic numbers 35, 53, and 85 are:
| 1. | Noble gases | 2. | Halogens |
| 3. | Heavy metals | 4. | Light metals |
Subtopic: Modern Periodic Table & Periodicity |
85%
Level 1: 80%+
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