# Multiple choice question for engineering

## Set 1

1-10. A bucket contains 48 gms of NaOH, 56 gms of H2O and 184 gms of H2SO4. (Molecular weights of the components are 40, 18 and 98 respectively)

1. How many moles of NaOH are there in the bucket?

a) 1.0

b) 1.2

c) 1.4

d) 1.6

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2. How many moles of H2SO4 are there in the bucket?

a) 1.44

b) 1.88

c) 2.44

d) 2.88

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3. How many moles of H2O are there in the bucket?

a) 3.1

b) 3.2

c) 3.3

d) 3.4

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4. What are the number moles of Oxygen present there in the bucket?

a) 14.82

b) 13.82

c) 12.82

d) 11.82

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5. How many moles of Hydrogen are there in the bucket?

a) 11.00

b) 11.16

c) 11.56

d) 11.98

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6. What is the weight percentage of H2O?

a) 19.44

b) 14.42

c) 12.56

d) 10.28

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7. What is mole percentage of H2SO4?

a) 10.4

b) 20.4

c) 30.4

d) 40.4

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8. What is the weight percentage of NaOH?

a) 14.67

b) 15.67

c) 16.67

d) 17.67

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9. What is mole percentage of NaOH?

a) 20.4

b) 19.4

c) 18.4

d) 17.4

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10. What is the weight percentage of H2SO4 ?

a) 14.82

b) 25.69

c) 58.67

d) 63.88

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## Set 2

1-10. A bucket contains 48 gms of NaOH, 56 gms of H2O and 184 gms of H2SO4. (Molecular weights of the components are 40, 18 and 98 respectively)

1. How many moles of NaOH are there in the bucket?

a) 1.0

b) 1.2

c) 1.4

d) 1.6

### View Answer

2. How many moles of H2SO4 are there in the bucket?

a) 1.44

b) 1.88

c) 2.44

d) 2.88

### View Answer

3. How many moles of H2O are there in the bucket?

a) 3.1

b) 3.2

c) 3.3

d) 3.4

### View Answer

4. What are the number moles of Oxygen present there in the bucket?

a) 14.82

b) 13.82

c) 12.82

d) 11.82

### View Answer

5. How many moles of Hydrogen are there in the bucket?

a) 11.00

b) 11.16

c) 11.56

d) 11.98

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6. What is the weight percentage of H2O?

a) 19.44

b) 14.42

c) 12.56

d) 10.28

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7. What is mole percentage of H2SO4?

a) 10.4

b) 20.4

c) 30.4

d) 40.4

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8. What is the weight percentage of NaOH?

a) 14.67

b) 15.67

c) 16.67

d) 17.67

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9. What is mole percentage of NaOH?

a) 20.4

b) 19.4

c) 18.4

d) 17.4

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10. What is the weight percentage of H2SO4 ?

a) 14.82

b) 25.69

c) 58.67

d) 63.88

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## Set 3

1. What is the percent by weight of C in CO2?

Molecular weight of C and Oxygen are 12 and 16 respectively?

a) 25

b) 50

c) 75

d) None of the mentioned

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2. How many moles of Hydrogen are there in 1 mole of (NH4)2HPO4?

a) 1

b) 4

c) 5

d) 9

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3. Relative molecular masses can be calculated

a) By the relative atomic mass

b) By the relative mass of a covalent compound

c) if individual relative atomic masses are added

d) By adding relative compound masses

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4. What is the percentage by weight of Nitrogen in NH3?

a) 82.35

b) 83.40

c) 88.12

d) 94.56

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5. Relative molecular mass of CO2 is _________

a) 22

b) 44

c) 66

d) 88

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6. How many gms of NaOH is there in 0.002 lb mole NaOH?

a) 32.36

b) 36.32

c) 24.28

d) 28.24

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7. The quantity of matter present in an object is

a) Mass

b) Molecular weight

c) Mole

c) Molar mass

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8. The smallest particle of a substance that is capable of independent existence is _________

a) Atom

b) Molecule

c) Electron

d) Proton

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9. One mole of H2O equals

a) 22.4 litre at 1 atm and 250C

b) 6.02 x 10^{23} atoms of hydrogen and 6.02 x 10^{23} atoms of oxygen

c) 18 g

d) 1 gal

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10. What is the percent by weight of P in the compound in P4S3?

a) 28.3

b) 56.4

c) 25.3

d) 58.3

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## Set 4

1. What is the percent by weight of C in CO2?

Molecular weight of C and Oxygen are 12 and 16 respectively?

a) 25

b) 50

c) 75

d) None of the mentioned

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2. How many moles of Hydrogen are there in 1 mole of (NH4)2HPO4?

a) 1

b) 4

c) 5

d) 9

### View Answer

3. Relative molecular masses can be calculated

a) By the relative atomic mass

b) By the relative mass of a covalent compound

c) if individual relative atomic masses are added

d) By adding relative compound masses

### View Answer

4. What is the percentage by weight of Nitrogen in NH3?

a) 82.35

b) 83.40

c) 88.12

d) 94.56

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5. Relative molecular mass of CO2 is _________

a) 22

b) 44

c) 66

d) 88

### View Answer

6. How many gms of NaOH is there in 0.002 lb mole NaOH?

a) 32.36

b) 36.32

c) 24.28

d) 28.24

### View Answer

7. The quantity of matter present in an object is

a) Mass

b) Molecular weight

c) Mole

c) Molar mass

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8. The smallest particle of a substance that is capable of independent existence is _________

a) Atom

b) Molecule

c) Electron

d) Proton

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9. One mole of H2O equals

a) 22.4 litre at 1 atm and 250C

b) 6.02 x 10^{23} atoms of hydrogen and 6.02 x 10^{23} atoms of oxygen

c) 18 g

d) 1 gal

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10. What is the percent by weight of P in the compound in P4S3?

a) 28.3

b) 56.4

c) 25.3

d) 58.3

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## Set 5

1-10. A cylinder contains 56 gms of N_{2}, 128 gms of O_{2} and 64 gms of SO_{2}. (Molecular weights of the components are 28, 64 and 64 respectively)

1. How many moles of N_{2} are there in the cylinder?

a) 1

b) 2

c) 4

d) 6

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2. How many moles of O_{2} are there in the cylinder?

a) 1

b) 2

c) 4

d) 6

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3. How many moles of SO_{2} are there in the cylinder?

a) 1

b) 2

c) 4

d) 6

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4. What are the number moles of Oxgen present there in the cylinder?

a) 1

b) 2

c) 3

d) 4

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_{2}= 2+1 = 3.

5. How many moles of Sulfur are there in the cylinder?

a) 1

b) 2

c) 4

d) 6

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6. What is the mole fraction of N_{2}?

a) 0.2

b) 0.4

c) 0.6

d) 0.8

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7. What is the mole fraction of O_{2}?

a) 0.2

b) 0.4

c) 0.6

d) 0.8

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8. What is the mole fraction of SO_{2}?

a) 0.2

b) 0.4

c) 0.6

d) 0.8

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9. What is weight percentage of N_{2}?

a) 22.58

b) 25.86

c) 42.56

d) 54.87

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10. What is weight percentage of O_{2}?

a) 51.61

b) 61.71

c) 71.81

d) 81.91