Which of the following is unit of amount of substance?

Related Mcqs:

Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?

A. ionic substances B. metallic substances C. molecular solids D. covalent network solids...

Human beings use _______ liters of pure oxygen per day.

A. 550 B. 2500 C. 1,050 D. 10,000...

The scientific study of measurement is known as __________?

A. Entomology B. Metrology C. Ichthyology D. Ecology...

Which one of the following mixtures of gases is required in gas welding?

(a) Oxygen and ethylene (b) Oxygen and hydrogen (c) Acetylene and oxygen (d) Acetylene and hydrogen...

Ozone layer is affected by which harmful gas?

A. Chloro carbon B. Floro carbon C. Chloro floro carbon...