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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
1. |
Which element is heaviest melting and boiling point metal ? |
Answer» Correct Answer - Tungsten `(W)`<br>Tungsten `(W)` | |
2. |
Name the lightest solid non-metal having the highest tensile strenght. |
Answer» Correct Answer - `B`<br>Boron `(B)` | |
3. |
Name of the heaviest naturally occurring element.A. `U`B. `Ra`C. `Pb`D. `Hg` |
Answer» Correct Answer - A<br>`U(Z = 92, Aw = 238)` is the haviest element among the given elements. | |
4. |
Name the most poisonous element. |
Answer» Correct Answer - `Pu`<br>Plutonium `(Pu)` | |
5. |
Which elements is heaviest melting point liquid metal ? |
Answer» Correct Answer - `Hg`<br>Mercury `(Hg)` | |
6. |
Which of the following statement is wrong?A. In the lanthanide series the electrons occupy `4f`-orbitals in preference to `5d` the and `6p`-orbitals.B. Zero group was not present in the periodic table when Mendeleev presented it.C. Law of octave was presented by Newland.D. Cuprous compounds are coloured while cupric compounds are colourless. |
Answer» Correct Answer - D<br>(d) Statement (d) is wrong.<br> `Cu(Z = 29), 3rd^(10), 4s^(1)`<br> `Cu^(o+)` (cuprous) `= 3d^(10) 4s^(0)`<br> `Cu^(2+)` (cupric) `= 3d^(9) 4s^(0)` (one unpaired electron and hence is coloured). | |
7. |
Name the best and the poorest conductor of current among metals. |
Answer» Correct Answer - `Ag` and `Pb`<br>`Ag` and `pb` | |
8. |
Name the heaviest solid metal. |
Answer» Correct Answer - `Os`<br>Osmium `(Os)` | |