Exams

No. Boiling water is not a chemical change. Because in this process it doesn't loss its properties. It just changes its state i.e, from liquid state to gaseous.

Hence, Boiling water is a Physiacl change and not a chemical change.

Given Karthik + Kalyan = 112

Given that when karthik is at the age of kalyan he is twice of Kalyan's age

i.e When he was 48 means Kalyan is at 24

=> Present age of Kalyan is 48

And that of Karthik is 112 - 48 = 64

A shell is an interactive user interface to an operating system services that allows an user to enter commands as character strings or through a graphical user interface. The shell converts them to system calls to the OS or forks off a process to execute the command. System call results and other information from the OS are presented to the user through an interactive interface. Commonly used shells are sh,csh,ks etc.