Chemistry States of Matter Test Online Mcqs Preparation

Chemistry States of Matter Test Online Mcqs Preparation With Answers Start Below

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Question 1 of 15

1. The boiling point of H₂O is 100°C while that of C₂H₅OH is 78.5°C. The reason is that

A. H2O molecules are small sized

B. The number of hydrogen bonds per H2O molecule are greater than C2H5-OH

C. The bond angles at oxygen atom are different

D. C2H5 group is electron donating

Question 1 of 15

Question 2 of 15

2. The number of molecules in 0.0112m³ of methane at 25°C and pressure of 760mm Hg is:

A. 3.01 x 1012

B. 3.01 x 1023

C. 6.02 x 1023

D. 6.02 x 1020

Question 2 of 15

Question 3 of 15

3. The graph between pressure and inverse of volume at constant temperature and number of moles

A. Straight line parallel to x-axis

B. Straight line parallel to y-axis

C. Straight line passing through the origin

D. None of them

Question 3 of 15

Question 4 of 15

4. At 1atm pressure, a liquid 1 has the boiling point less than a liquid 2, what can we predict about both the liquids:

A. Liquid 1 has the weak intermolecular forces of attraction than the liquid 2

B. Liquid 1 has high vapor pressure than the liquid 2

C. All of the above

D. Liquid 1 is more volatile than the liquid 2

Question 4 of 15

Question 5 of 15

5. Ammonia shows the maximum boiling point among the hydrides of 5^th group because:

A. Pyramidal structure of ammonia

B. Enhanced electro-negativity character of nitrogen

C. Lone pair of electrons present on nitrogen

D. Very small size of nitrogen

Question 5 of 15

Question 6 of 15

6. In a closed vessel of 1000 cm³, H₂ gas is heated from 27°C to 127°C. Which statement is not correct?

A. The energy of gas molecules increases

B. Pressure of gas increases

C. The number of moles of gas increases

D. The rate of collision increases

Question 6 of 15

Question 7 of 15

7. The distillation of a solution under reduced pressure is called

A. Fractional distillation

B. Destructive distillation

C. Distillation

D. Vacuum distillation

Question 7 of 15

Question 8 of 15

8. The crystals formed due to London forces of interaction are

A. Metallic

B. Covalent

C. Ionic

D. Molecular

Question 8 of 15

Question 9 of 15

9. Partial pressure of oxygen in the lungs is

A. 50 torr

B. 159 torr

C. 760 torr

D. 116 torr

Question 9 of 15

Question 10 of 15

10. Which of the following will have same number of molecules at STP:

A. 11.2 dm3 of O2 and 32g of O2

B. 280 cm3 of CO2 and 280 cm3 of N2O

C. 44g of CO2 and 11.2 dm3 CO

D. 28g of N2 and 5.6 dm3 of oxygen

Question 10 of 15

Question 11 of 15

11. Evaporating water depends upon the following:

A. All of these

B. Humidity in air

C. Speed of the air above the liquid surface

D. Surface area and intermolecular forces

Question 11 of 15

Question 12 of 15

12. The boiling point of compound is mostly raised by

A. Intra molecular Hydrogen bonding

B. London dispersion forces

C. Dipole induced dipole interaction

D. Inter molecular hydrogen bonding

Question 12 of 15

Question 13 of 15

13. Which of the liquid has lowest vapour pressure

A. Br2

B. C2H5 – OH

C. Ether

D. H2O

Question 13 of 15

Question 14 of 15

14. The sudden expansion of the gas from high pressure towards the low pressure causes

A. Greater number of confusions among the molecules

B. Increase of temperature

C. Decrease of temperature

D. Decrease of velocities of gas molecules

Question 14 of 15

Question 15 of 15

15. Evaporation is designated as a cooling process because of the reason:

A. All of the above

B. High energy molecules leave behind the low energy molecules and cause cooling

C. It is a surface phenomenon

D. It involves heat absorption

Question 15 of 15

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Chemistry States of Matter Test Online Mcqs Preparation

Chemistry States of Matter Test Online Mcqs Preparation With Answers Start Below

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