State of Matter MCQ question and answer with solution

31

Creation of something from nothing is against the law of

A) Constant proportions B) Conservation of mass energy C) Multiple proportion D) Reciprocal Proportions

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Answer & Solution

Answer: Option B

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32

Assertion (A) All liquids are conductors of electricity.
Reason (R) Under the condition of low pressure and high voltage, liquids can be made conducting.

A) Both A and R are true and R is the correct explanation of A B) Both A and R are true, but R is not the correct explanation of A C) A is true, but R is false D) A is false, but R is true

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Answer & Solution

Answer: Option D

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33

Which of the following gases will have the highest rate of diffusion?

A) O₂ B) CO₂ C) NH₃ D) N₂

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Answer & Solution

Answer: Option C

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34

Consider the following statements.
1. When evaporation takes place, cooling takes place.
2. Evaporation takes place at all temperature, boiling takes place only at the boiling point.
3. Evaporation is a surface phenomenon.
Which of the statements given above is/are true?

A) Only 1 B) 1 and 2 C) 2 and 3 D) 1, 2 and 3

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Answer & Solution

Answer: Option D

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35

The temperature of a place on one sunny day is 113 in Fahrenheit scale. The Kelvin scale reading of this temperature will be

A) 318 K B) 45 K C) 62.8 K D) 335.8 K

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Answer & Solution

Answer: Option A

Solution:

Let's break down how to solve this temperature conversion problem!
First, we need to convert Fahrenheit (°F) to Celsius (°C).
The formula for that is: °C = (°F - 32) × 5/9
In this case, °F = 113. So, °C = (113 - 32) × 5/9 = 81 × 5/9 = 45°C
Now, we need to convert Celsius (°C) to Kelvin (K).
The formula for that is: K = °C + 273.15
So, K = 45 + 273.15 = 318.15 K
The closest option to 318.15 K is 318 K.
Therefore, the answer is: Option A: 318 K

36

Which one of the following is used as an anti-freezer, which effectively depresses the freezing point of water in an automobile?

A) Ethylene glycol B) Propanoic acid C) Glutamic acid D) Glycolic acid

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Answer & Solution

Answer: Option A

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37

Consider the following statements.
1. A real gas can be approximated as an ideal gas when it is highly dilute.
2. Only monoatomic gases can be approximated as ideal gases.
3. An ideal gas does not undergo phase transitions.
Which of the above statements are correct?

A) 1 and 2 B) 1 and 3 C) 2 and 3 D) 1, 2 and 3

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Answer & Solution

Answer: Option B

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38

When a gas is compressed at constant temperature

A) the speeds of the molecules decreases B) the speeds of themolecules increaser C) the collisions between the molecules increase D) the collisions between the molecules decrease

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Answer & Solution

Answer: Option C

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39

Air at sea level is found to be dense. This is in accordance with

A) Boyle's Law B) Charle's Law C) Dalton's Law D) Avogadro's Law

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Answer & Solution

Answer: Option A

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40

30°C = Kelvin (approximately)

A) -243 B) 303 C) 130 D) -30

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Answer & Solution

Answer: Option B

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State of Matter MCQ question and answer with solution | Chemistry Gk MCQs