The ratio of the mass percentages of 'C and H' and C & O of a saturated acyclic organic compound 'X' are 4:1 and 3:4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound 'X' is:

Q. The ratio of the mass percentages of 'C and H' and C &O of a saturated acyclic organic compound 'X' are 4:1 and 3:4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound 'X' is

Q. Complete combustion of $1.80g$ of an oxygen containing compound $\left(C_x{H}_y{O}_z\right)$ gave $2.64g$ of $C{O}_2$ and $1.08g$ of $H_{2}O$. The percentage of oxygen in the organic compound is :

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> JEE MAIN 2021

Q. Complete combustion of 750 g of an organic compound provides 420 g of $C{O}_2$ and 210 g of $H_{2}O$.The percentage composition of carbon and hydrogen in organic compound is 15.3 and ______ respectively.
(Rounded off to the nearest integer)

Q. The ratio of mass percent of C and H of an organic compound $\left(C_X{H}_Y{O}_Z\right)$ is 6 : 1. If one molecule of the above compound $\left(C_X{H}_Y{O}_Z\right)$ contains half as much oxygen as required to burn one molecule of compound $C_X{H}_Y$ completely to $C{O}_2$ and $H_{2}O$. The empirical formula of compound $C_X{H}_Y{O}_Z$ is

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> JEE MAIN 2018

Q. Find the value of <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $a$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $b^2$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $c^3$ + <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $d^4$.
Given that $a$, $b$, $c$ and $d$ are the x co-ordinates of the points which are reflections of (4, 3), (3, 2), (2, 1) and (1, 0) in x-axis.