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## 41. 1g of hydrogen is equal to

A. 1 mole of Hydrogen

B. 6.023 1023 atoms of Hydrogen

C. Both a and b

A. Gram

C. Mole

A. Mole

B. Gram

C. NA

## 44. Mass of atom is expressed in

A. Gram

B. Atomic Mass Unit

C. mol

A. 11g

B. 12 amu

C. None of these

## 46. When reletavie atomic mass expressed in grams then it is called

A. amu

B. Atomic Mass

C. Gram Atomic Mass

A. Fromula mass

B. Gram formula

C. None

## 48. 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. 1 mole

B. 1.36 moles

C. 2 moles

## 50. Correct formula to calculate no. of particles is

A. n =mass /molar mass

B. No. of particles= n* NA

B. Both a and b

A. Milk

B. Air

C. Water

A. 3

B. 36.5

C. 30

A. 10g

B. 98g

C. 80g

A. Bohr

B. Rutherford

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. 400 B.C

A. Indivisible

B. Divisible

B. Both

A. Identical

B. Not identical

C. Changed

A. 11

B. 114

C. 1911