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*CHEMISTRY DEMO CLASSES*

- Date: Tomorrow
- Time: 4 pm
- Subject: Chemistry
- Location: Sir Shahnawaz Bhutto Memorial Library
- Eligibility: Open to all students
- Demo classes: 3 days available

For more information, contact:
03139377632

Here are some multiple-choice questions (MCQs) on Charles's Law:

1. Charles's Law deals with the relationship between which two variables?
- A. Pressure and volume
- B. Temperature and pressure
- C. Temperature and volume
- D. Volume and density

2. According to Charles's Law, if the volume of a gas increases, the temperature:
- A. Increases
- B. Decreases
- C. Remains the same
- D. Cannot be determined

3. Charles's Law can be mathematically represented as:
- A. \( P_1V_1 = P_2V_2 \)
- B. \( V_1/T_1 = V_2/T_2 \)
- C. \( V_1 + V_2 = T_1 + T_2 \)
- D. \( P_1/T_1 = P_2/T_2 \)

4. In Charles's Law, the temperature must be in which unit?
- A. Celsius
- B. Fahrenheit
- C. Kelvin
- D. Any of the above

5. If a gas occupies a volume of 2 liters at a temperature of 300 K, what will its volume be if the temperature is increased to 450 K, assuming the pressure remains constant?
- A. 3 liters
- B. 4 liters
- C. 5 liters
- D. 6 liters

6. Charles's Law is based on the principle that:
- A. The volume of a given mass of gas is inversely proportional to its pressure at a constant temperature.
- B. The volume of a given mass of gas is directly proportional to its absolute temperature at constant pressure.
- C. The pressure of a given mass of gas is inversely proportional to its volume at constant temperature.
- D. The pressure of a given mass of gas is directly proportional to its temperature at constant volume.

7. Which of the following statements is true regarding Charles's Law?
- A. It explains the relationship between pressure and volume.
- B. It explains the relationship between volume and temperature at constant pressure.
- C. It explains the relationship between temperature and pressure at constant volume.
- D. It explains the relationship between volume and mass at constant temperature.

1. What is the primary characteristic of a gas?
a) Definite shape and volume
b) Definite shape, but indefinite volume
c) Indefinite shape and volume
d) Indefinite shape, but definite volume

2. Which gas law describes the relationship between pressure and volume, assuming constant temperature and moles of gas?
a) Boyle's law
b) Charles's law
c) Gay-Lussac's law
d) Avogadro's law

3. At constant pressure, if the temperature of a gas is doubled, what happens to its volume?
a) It doubles
b) It halves
c) It quadruples
d) It remains the same

4. Which gas law combines Boyle's law, Charles's law, and Gay-Lussac's law into a single equation?
a) Ideal gas law
b) Dalton's law
c) Graham's law
d) Combined gas law

5. At standard temperature and pressure (STP), one mole of an ideal gas occupies how much volume?
a) 22.4 liters
b) 1 liter
c) 10 liters
d) 100 liters

6. According to kinetic molecular theory, what happens to the average kinetic energy of gas molecules as the temperature increases?
a) It decreases
b) It remains constant
c) It increases
d) It becomes zero

Answers:
1. c) Indefinite shape and volume
2. a) Boyle's law
3. c) It quadruples
4. d) Combined gas law
5. a) 22.4 liters
6. c) It increases

Q)How many % of ethane present in sui gas ? a)94.6% b)2% c)1.05% d)3.88%

Q)Methane is used as ?. . a)domestic fuel b)manufacturing of methanol. c)Carbon black d)polishes e) All

Q)Methane is a? a) polar b)unreactive c)similar d)All

Q)Homologous series has same 1)chemical properties b) physical properties c)both d) None

1. Which of the following is NOT a characteristic of a homologous series?
a) Similar chemical properties
b) Gradual change in physical properties with increasing molecular size
c) Same functional group
d) Different chemical properties

2. What is the general formula for alkanes in a homologous series?
a) CnH2n+2
b) CnH2n
c) CnH2n-2
d) CnH2n+1

3. Which of the following is an example of a homologous series?
a) Ethanol, methanol, propanol
b) Ethene, propene, butene
c) Methane, ethane, propane
d) Ethanol, methanoic acid, ethanoic acid

4. In a homologous series, as the molecular size increases:
a) Boiling point decreases
b) Melting point decreases
c) Both boiling point and melting point increase
d) Both boiling point and melting point decrease

5. Which functional group is present in the homologous series of alcohols?
a) -OH
b) -COOH
c) -CHO
d) -NH2

Q)Generally Alkane are formed from? a)Alkene b)Alkyl hallide c)ester d)Alcohol

Which among the following shows functional group isomerism a)Aldehyde and ketone b)Alcohol and ether c)carboxylic acid and ester d)All