Chemistry XI (CHAPTER 1)

To convert given mass of substance into mole, we ___ it by molar mass.

• Divide

• Multiply

• Add

• Substract

If moles are needed to be converted into mass, we simply ___ them with molar mass.

• Divide

• Multiply

• Add

• Substract

Hydrogen gas is commercially prepared by ___.

• Ethane process

• Steam methane process

• Steam ethane process

• Methane process

The actual amount of product which is formed in experiment is called ___.

• Practical yield

• Actual yield

• Both

• None of these

The unit for molar mass is ___.

• g/mol

• mg/mol

• kg/mol

• mol

A mole is defined as gram atomic mass of any substance (atoms, molecules, ions) which contains ___ particles.

• 6.02×10^23

• 6.02×10^24

• 6.02×10^25

• 6.02×10^26

The number of particles present in one mole of any substance is called ___.

• Mole

• Avogadro's Number

• Heap

• Pile

The difference between the mass of one atom of an element is specified by ___.

• atm

• mol

• a.m.u

• grams

Exponential notation is represented as the ___ of two numbers N×10^x.

• Sum

• Product

• Cross multiply

• None of these

To reduce a number up to desired significant figures and adjust the last reported digit is known as ___.

• Significant numbers

• Rounded off data

• Rounded off numbers

• None of these