MCQ
____________ and ____________ are the rarest elements of the group 18.
- ✓Argon, radon
- BXenon, helium
- CXenon, radon
- DHelium, argon
✓
Answer
Correct option: A.
Argon, radon
A
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following is also known as sensory chamber?
Acylation of ethanamine to form N-ethylethanamide is an example of ____________ reaction.
______ refers to a phenomenon in which heterozygotes have features of both the homozygotes, that is, an allele is neither dominant nor recessive to the other.
In leaching of alumina from bauxite by Bayer's process, then ore is treated with $.......$
→The gate represented in the given figure is ______.
An object is thrown vertically upward with a speed of 15 m/s. The velocity of the object 2s before it reaches the maximum height is ____________.
How many codons will be altered in the following case?
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases.
The sum of the cofactors of the elements of second row of the matrix$\left[\begin{array}{ccc}1 & 3 & 2 \\ -2 & 0 & 1 \\ 5 & 2 & 1\end{array}\right]$ is________
→Which of the following is NOT SI unit?
How many asymmetric carbon atoms are present in a molecule if it has 16 optical isomers?