Science Talent Hunt

Science Talent Hunt

ONLINE EXAM MCQ BASED FOR NEET ASPIRANTS

Operating as usual

18/08/2023

Write a short story in about eighty words using the following hints

a farmer finds a snake almost dead with cold-brings it home-warms it-saves its life-the snake is about to bite the farmer's son-the farmer chases away the snake .
Try to write.

18/08/2023

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13/08/2023
13/08/2023

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28/06/2023

Let;s try these questions below for class 12 students
20 multiple-choice question on the Solid State and Solutions chapter of Class 12 Chemistry, carrying a total of 20 marks:

1. Which of the following statements about the solid state and solutions is correct?
a) Solids have fixed shape and volume, while solutions have variable shape and volume.
b) Solids have variable shape and volume, while solutions have fixed shape and volume.
c) Both solids and solutions have fixed shape and volume.
d) Both solids and solutions have variable shape and volume.

2. Which of the following is an example of an amorphous solid?
a) Diamond
b) Quartz
c) Glass
d) Sodium chloride

3. Which of the following is a characteristic of a crystalline solid?
a) Random arrangement of particles
b) Long-range order in particle arrangement
c) No definite melting point
d) Amorphous structure

4. The unit cell is the basic repeating structural unit of a:
a) Solution
b) Crystal lattice
c) Colloid
d) Suspension

5. Which of the following is a type of crystal lattice structure?
a) Ionic
b) Metallic
c) Covalent
d) All of the above

6. The intermolecular forces that hold a solid together are:
a) Ionic bonds
b) Covalent bonds
c) Metallic bonds
d) All of the above

7. Which of the following is not a property of an ideal solution?
a) No intermolecular forces between solute and solvent particles
b) No change in volume upon mixing
c) No change in enthalpy upon mixing
d) Complete miscibility in all proportions

8. The solubility of a solid in a liquid generally:
a) Decreases with increasing temperature
b) Increases with increasing temperature
c) Remains constant with temperature
d) Depends on the nature of the solid only

9. The process of dissolution of a solid in a liquid is:
a) Exothermic
b) Endothermic
c) Neither exothermic nor endothermic
d) Depends on the solute-solvent combination

10. Henry's law is related to the solubility of a:
a) Solid in a liquid
b) Liquid in a liquid
c) Gas in a liquid
d) Gas in a gas

11. The colligative properties of solutions depend on:
a) The nature of the solute
b) The nature of the solvent
c) The concentration of the solute
d) All of the above

12. Which of the following is not a colligative property?
a) V***r pressure lowering
b) Boiling point elevation
c) Freezing point depression
d) Molar mass of the solute

13. Raoult's law is applicable to:
a) Ideal solutions only
b) Non-ideal solutions only
c) Both ideal and non-ideal solutions
d) None of the above

14. The freezing point depression is directly proportional to:
a) The concentration of the solute
b) The molar mass of the solute
c) The boiling point of the solvent
d) The nature of the solute

15. Which of the following factors affect the rate of dissolution of a solid solute in a liquid solvent?
a) Temperature
b) Surface area of the solute
c) Agitation or stirring
d) All of the above

16. A saturated solution is a solution that:
a) Contains the maximum amount of solute dissolved at a given temperature
b) Contains an equal amount of solute and solvent
c) Contains an excess amount of solute
d) Contains a minimum

amount of solute dissolved at a given temperature

17. The concentration of a solution is expressed in terms of:
a) Grams per liter (g/L)
b) Moles per liter (mol/L)
c) Percentage (%)
d) All of the above

18. The solubility of most solid solutes in water:
a) Increases with increasing temperature
b) Decreases with increasing temperature
c) Does not depend on temperature
d) Depends on the nature of the solid only

19. The solubility of a gas in a liquid generally:
a) Increases with increasing temperature
b) Decreases with increasing temperature
c) Does not depend on temperature
d) Depends on the nature of the gas only

20. Which of the following is a non-electrolyte solute?
a) Sodium chloride (NaCl)
b) Hydrochloric acid (HCl)
c) Glucose (C6H12O6)
d) Potassium hydroxide (KOH)

for answer and explanations, please contact/whatsapp me

Science Tuition - YouTube 04/05/2023

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Science Tuition - YouTube Share your videos with friends, family, and the world

13/04/2023

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ক্লিক করে আমার চ্যানেল এ অংশ নিতে ক্লিক কর ।

CLASS XI CHEMISTRY, Chapter 1.3.4 24/03/2023

https://youtu.be/-tvPiCRE6no

CLASS XI CHEMISTRY, Chapter 1.3.4 XI/ Chemistry Chap 1/1.3.3-4/একাদশ রসায়ন, চ্যাপ্টার ওয়ান , তাৎপর্যপূর্ণ সংখ্যা সংক্রান্ত গাণিতিক সমস্যার উদাহরণ।Basic Concept in Chemistry আলোচ....

03/12/2022

Online Quiz Competition, 2022
For Class VII
Click the link given below to take part in this Competiotion

https://test.gclocked.com/?form=-NIIQxWKkhFkRnYZ_YJl

Syllabus - WBBSE BOARD MATH & SCIENCE in Bengali Version. All the details will be provided during Quiz.

03/12/2022

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