Questions

Covalent bonds are bonds formed between two non metals by sharing of electrons in their outer most orbits for stable.

A center equipped to handle a large volume of telephone calls. These calls could be the calls coming in from customers for service or support or these could be the calls that call center executives make to the customers for marketing

There are mainly two types of call centers :

a) Inbound call centers – Inbound call centers are those which receive support or service calls from customers usually on a toll free number. For e.g. when you call up a bank to check the status of your request for credit card, it is an inbound call.

b) Outbound call centers – Outbound call centers are those in which the call center executives make calls to the customers. These calls are usually made to generate the leads or sales. For e.g. when you receive a call from a bank offering you a personal loan, it is an outbound call. 

Indus Valley Civilization flourished during 2500-1750 B.C. Indus Valley Civilization is also called as Bronze age civilization.

Tennis rackets and ballpoint pens are two independent goods. Since, one doesn't depend on the other.