Which of the following gases exists more abundantly in nature than the others?

The compound that cannot exist with xenon is

Which of the following is not correct for the given reaction sequence:
$XeF_6$ $\xrightarrow{+ H_2O} A$ $\xrightarrow{+ H_2O} B$ $\xrightarrow{+ H_2O} C$

Under ambient conditions,the total number of gases released as products in the final step of the reaction scheme shown below is:

Which one of the following noble gases is not found in the atmosphere?

Which of the following compounds of Xenon has a pyramidal geometry?