CLOSE

A) M

B) N

C) mol

A. Mole

B) Gram

C) NA

## 143- Mass of atom is expressed in

A. Gram

B) Atomic mass unit

C) mol

A. 11g

B) 12 amu

C) None of these

A. 18 g

B) 16g

C) 20g

## 146- When reletavie atomic mass expressed in grams then it is called

A. amu

B) atomic mass

C) gram atomic mass

## 147- 1g atom of hydrogen is equal to

A. 1.008 g hydrogen

B) 1 mol of hydrogen

C) both a and b

A. Atomic mass

B) Gram molecule

C) Gram atom

A) Fromula mass

B) Gram formula

C) None

## 150-What is correct formula for calculating no. of moles

A) n= given mass in grams / molar mass

B) n= given mass × molar mass

C) none of these

A) Wrong

B) Good

C) Correct

D) Both A & C

## 152-Correct formula to calculate no. of particles is

A) n= mass/ molar mass

B) No. of particles = n × NA

C) Both a and b

A) Milk

B) Air

C) Water

A) 35

B) 36.5

C) 30

A) 89g

B) 98g

C) 80g

A) Boher

B) Rutherfoard

C) Democritus

A) Italian

B) Greek

C) None of these

A) Divisible

B) Indivisible

C) Free

A) 200 B.C.

B) 300 B.C.

C) 400B.C

A) Indivisible

B) Divisible

C) Both