Social cloud is a new paradigm which allows a user to share the system resources for computing purposes when it is not being used. This paper focuses on the social cloud where the computing nodes are managed by the social bonds determined from a social graph. Whenever a task is given by a user, the burden of computing is passed to the friend to whom he is connected directly in the social network. We have proposed a new index called trust index for calculating the trust value of a user and also to find out whether a user is trustworthy or not. Trust index helps to verify a friend in a social network and make them trustworthy. Trust based scheduling is done using FCFS and round robin and shown that the performance of round robin is better than FIFO in social cloud. Copyright © 2018 Inderscience Enterprises Ltd.