Question : What is the name of the 87th element on the periodic table that has no known biological role because it has a half-life of only 22 minutes?
Option 1: Meitnerium
Option 2: Dubnium
Option 3: Seaborgium
Option 4: Francium
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Correct Answer: Francium
Solution : The correct answer is Francium.
The 87th element on the periodic table is Francium, which has no known biological role due to its extreme radioactivity and short half-life. Francium is a chemical element with the atomic number 87, and the symbol Fr. It is one of the alkali metals with a group of elements in the periodic table known for their high reactivity, and ability to readily form compounds, especially with water. However, Francium is exceptionally rare, and highly radioactive, making it challenging to study and handle.
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Question : Name the transuranium element with atomic number 106, created by bombarding californium-249 with oxygen-18 nuclei.
Option 1: Seaborgium
Option 3: Hassium
Option 4: Copernicium
Question : Which d-block element in the periodic table is represented by the Greek symbol "alpha" and the metallic "rays"?
Option 1: Lanthanum
Option 2: Actinium
Option 3: Rhenium
Option 4: Tungsten
Question : The speed of a train including stoppages is 75 kmph and excluding stoppages, the speed of the train is 90 kmph. For how many minutes does the train stop per hour?
Option 1: 10 minutes
Option 2: 15 minutes
Option 3: 20 minutes
Option 4: 11 minutes
Question : Find the part of the given sentence that has an error in it. If there is no error, choose ‘No error’. You will never regret this wonderful experience with your life.
Option 1: regret this wonderful
Option 2: experience with your life.
Option 3: You will never
Option 4: No error
Question : The ionisation energy of nitrogen is greater than that of oxygen because nitrogen has:
Option 1: high bond dissociation energy
Option 2: smaller atomic radius
Option 3: half-filled P-orbitals
Option 4: high nuclear charge
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