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Moles,Density and Concentration Online Exam Quiz

Important questions about Moles,Density and Concentration. Moles,Density and Concentration MCQ questions with answers. Moles,Density and Concentration exam questions and answers for students and interviews.

How many grams of NaCl represent 1 mole?

Options

A : a. 23

B : b. 35.5

C : c. 58.5

D : d. 69.5

How many atoms of carbon represent 1.5 mole?

Options

A : a. 6.022 X 10²³

B : b. 1.2044 X 10²³

C : c. 3.011 X 10²³

D : d. 9.033 X 10²³

Calculate the number of moles in 42 grams of NaHCO??

Options

A : a. 0.5

B : b. 1

C : c. 1.5

D : d. 2

Calculate the number of moles in 369 grams of Ca°Cl??

Options

A : a. 1

B : b. 2

C : c. 3

D : d. 4

Which of the following has the same number of moles as in 398 grams of CuSO??

Options

A : a. 2 grams of hydrogen

B : b. 40 grams of oxygen

C : c. 35 grams of nitrogen

D : d. 58.5 grams of Sodium chloride

What are the number of atoms of chlorine in 250.5 grams of Cl?O??

Options

A : a. 1.806 X 10²?

B : b. 2.408 X 10²³

C : c. 9.033 X 10²³

D : d. 6.022 X 10²³

What are the number of moles of Hydrogen in 158 grams of Ammonium Bicarbonate?

Options

A : a. 5

B : b. 10

C : c. 15

D : d. 20

What are the number of moles of nitrogen in 274 grams of (NH?)?Ce(NO?)??

Options

A : a. 16

B : b. 8

C : c. 6

D : d. 4

What are the number of moles of hydrogen in NH?[Cr(SCN)?(NH?)?] if the weight of nitrogen in it is 49 grams?

Options

A : a. 3.5

B : b. 5

C : c. 7

D : d. 10

What are the number of molecules of water in CuSO?.5H?O, if the weight of oxygen in it is 36 grams?

Options

A : a. 3.25 X 10²³

B : b. 5.25 X 10²³

C : c. 7.52 X 10²³

D : d. 9.52 X 10²³

Which of the following is not a unit of density?

Options

A : a. Kg/m³

B : b. N/m³

C : c. N.s2/m4

D : d. g/cm³

What is the density of a substance of mass 10 grams and volume 5 liters?

Options

A : a. 2 kg/m³

B : b. 20 kg/m³

C : c. 200 kg/m³

D : d. 2000 kg/m³

A solid of density d is dropped in a liquid of density D, if d>D then,

Options

A : a. Solid will completely sink

B : b. Solid will completely float

C : c. Solid will partially sink

D : d. None of the mentioned

A liquid of mass 10 kg is enclosed in a cylinder of radius 1 m and length 5 m, what is the density of liquid?

Options

A : a. 0.54 kg/m³

B : b. 0.44 kg/m³

C : c. 0.63 kg/m³

D : d. 0.83 kg/m³

What is the density of a liquid of mass 20 kg, enclosed in a cuboid of surface areas of three sides as 1 m², 2 m², 5 m², and one of its sides is 2 m?

Options

A : a. 1 kg/m³

B : b. 2 kg/m³

C : c. 3 kg/m³

D : d. 4 kg/m³

What is the density of a liquid of mass 10 kg and contained in a cylinder of radius 5 m and surface area (excluding top and bottom) of 10? m²?

Options

A : a. 0.2? kg/m³

B : b. 0.4? kg/m³

C : c. 0.5? kg/m³

D : d. 0.6? kg/m³

What is the mass of a liquid having density 20 kg/m³, enclosed in a sphere of radius 1 m?

Options

A : a. 80.7 kg

B : b. 83.7 kg

C : c. 85.7 kg

D : d. 88.7 kg

What is the mass of a cube having surface area 24 m², and density 1 kg/m³?

Options

A : a. 1 kg

B : b. 2 kg

C : c. 4 kg

D : d. 8 kg

An empty vessel has with mass 5 kg with volume 0.1 m³, is now completely filled with a liquid of density 100 kg/m³, what is the final density of the cylinder?

Options

A : a. 50 kg/m³

B : b. 100 kg/m³

C : c. 150 kg/m³

D : d. 200 kg/m³

A cylinder completely filled with water has density = 10 kg/m³ and volume 5 m³ , now a cube with side 1 m and density 25 kg/m³ is dipped into the cylinder with some water dropping out, what is the final density of cylinder?(neglect the mass of cylinder)

Options

A : a. 13 kg/m³

B : b. 15 kg/m³

C : c. 17 kg/m³

D : d. 19 kg/m³

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