Questions

Here all the given compounds have both ionic and covalent bonds.

NaNO3 - In Sodium nitrate, Nitrate is covalently bonded as nitrogen is bonded with 3 oxygen atoms. And this nitrate is ionically bonded with sodium.

CaSO4 - In Calcium sulphate, sulphate is covalently bonded as sulphur is bonded with 4 oxygen atoms. And this sulphate is ionically bonded with calcium.

NH4Cl - In Ammonium chloride, ammonium is covalently bonded as nitrogen is bonded with 4 hydrogen atoms. And this ammonium is ionically bonded with chlorine.

Six sigma is a data-driven technique and way for eliminating defects in any progress from product to service and from manufacturing to transactional.

Product formation : It can be defined as putting different products and services together to form a product for the satisfaction of customer. For e.g. Hospitality is a product formation which is not made from a single item. 

Service brigade : Team of staffs involved in providing service

The Moment of Truth: It is the actual time when customer interacts with service staff. It is the moment of contact when no management has control. It is the motivation, skill, tools of the service and expectation, behavior, expectation of the customer determines the quality of the service.