Which metal is commonly used to remove air bubbles from molten metals?
Correct answer: A. Aluminium.
- A. Aluminium.
- B. Potasium.
- C. Sodium.
- D. Calcium.
Explanation
In aluminum or aluminum alloy casting, the bubbles of an inert gas like argon or nitrogen are passed through the molten metal to perform degassing. This degassing process removes the hydrogen gas from the molten alloys.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Periodic Properties and Trends questions
Which element has the largest number of allotropic forms?
Name the rare halogen among the following.
Electron affinity of an atom is the energy released when an electron _to an empty or partially filled orbital of an atom to form_?
Which Noble Gas is used in bacterial lamps?
Energy required to remove an electron from the outermost shell of its isolated gaseous atom in the ground state is:
The trend in the densities of elements of Group III-A of the Periodic Table is