QUES: Oil is a mixture of different carbon chains and to separate them from each other the oil must be heated

correct the punctuation.

CORRECTED: Oil is a mixture of different carbon chains, and to separate them from each other, the oil must be heated.

QUES: In that day the Egyptians will be like women and the land will be shaking with fear because of the waving of the Lords hand stretched out over it

correct the punctuation.

CORRECTED: In that day the Egyptians will be like women: and the land will be shaking with fear because of the waving of the Lord's hand stretched out over it.

QUES: System File Checker is a handy tool included with Windows that allows you scan for and restore corruptions in Windows system files including those related to IRQL_UNEXPECTED_VALUE

correct the punctuation.

CORRECTED:
System File Checker is a handy tool included with Windows that allows you scan for and restore corruptions in Windows system files (including those related to IRQL_UNEXPECTED_VALUE).