What is the value of $x$ if $2x + 5 = 15$?

$A$ die is thrown $10$ times. The probability that an odd number will come up at least one time is:

$5.6 \, \text{liter}$ of helium gas at $STP$ is adiabatically compressed to $0.7 \, \text{liter}$. Taking the initial temperature to be $T_1$,the work done in the process is

Which of the following is the correct electronic configuration of $Cr$ $(Z=24)$?

Which of the following is the correct electronic configuration of $Cr$ $(Z=24)$?

Which of the following is the correct electronic configuration of $Cu$ (atomic number $29$)?