Q. Which of the following gases is most likely to behave ideally?
A.
NH3
B.
H2O
C.
He
D.
CO2
Show solution
Solution
Helium (He) behaves most ideally due to its small size and weak intermolecular forces.
Correct Answer:
C
— He
Learn More →
Q. Which of the following gases is most soluble in water?
Show solution
Solution
CO2 is more soluble in water compared to O2, N2, and H2 due to its ability to form carbonic acid.
Correct Answer:
C
— CO2
Learn More →
Q. Which of the following gases is primarily responsible for the greenhouse effect?
A.
Ozone
B.
Carbon Dioxide
C.
Nitrogen
D.
Methane
Show solution
Solution
Carbon Dioxide is a major greenhouse gas that traps heat in the atmosphere, contributing to global warming.
Correct Answer:
B
— Carbon Dioxide
Learn More →
Q. Which of the following gases is produced when aluminum reacts with hydrochloric acid?
A.
Hydrogen
B.
Oxygen
C.
Chlorine
D.
Nitrogen
Show solution
Solution
Hydrogen gas is produced when aluminum reacts with hydrochloric acid.
Correct Answer:
A
— Hydrogen
Learn More →
Q. Which of the following gases will diffuse the fastest under identical conditions?
Show solution
Solution
According to Graham's law of effusion, lighter gases diffuse faster; hence, He will diffuse the fastest.
Correct Answer:
A
— He
Learn More →
Q. Which of the following gases will have the highest average speed at the same temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
Show solution
Solution
Hydrogen (H2) has the lowest molar mass, thus it will have the highest average speed according to the kinetic theory.
Correct Answer:
C
— Hydrogen (H2)
Learn More →
Q. Which of the following gases will have the highest rate of diffusion at a given temperature?
Show solution
Solution
According to Graham's law of effusion, lighter gases diffuse faster; H2 has the lowest molar mass and will diffuse the fastest.
Correct Answer:
D
— H2
Learn More →
Q. Which of the following gases will have the highest rate of diffusion at the same temperature?
Show solution
Solution
According to Graham's law, lighter gases diffuse faster. H2 has the lowest molar mass.
Correct Answer:
D
— H2
Learn More →
Q. Which of the following gases will have the highest RMS speed at the same temperature?
A.
Oxygen (M = 32 g/mol)
B.
Nitrogen (M = 28 g/mol)
C.
Hydrogen (M = 2 g/mol)
D.
Carbon Dioxide (M = 44 g/mol)
Show solution
Solution
RMS speed is inversely proportional to the square root of molar mass. Hydrogen has the lowest molar mass, hence it will have the highest RMS speed.
Correct Answer:
C
— Hydrogen (M = 2 g/mol)
Learn More →
Q. Which of the following gases will have the highest root mean square speed at the same temperature?
Show solution
Solution
The root mean square speed is inversely proportional to the square root of the molar mass. H2 has the lowest molar mass, hence it has the highest root mean square speed.
Correct Answer:
C
— H2
Learn More →
Q. Which of the following gases would have the highest average speed at a given temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
Show solution
Solution
At a given temperature, lighter gases like hydrogen (H2) have higher average speeds compared to heavier gases like oxygen (O2) or carbon dioxide (CO2).
Correct Answer:
C
— Hydrogen (H2)
Learn More →
Q. Which of the following gases would have the highest average speed at the same temperature? (2020)
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
Show solution
Solution
At the same temperature, lighter gases have higher average speeds. Hydrogen (H2) has the lowest molar mass and thus the highest average speed.
Correct Answer:
C
— Hydrogen (H2)
Learn More →
Q. Which of the following gases would have the highest rate of diffusion at a given temperature?
Show solution
Solution
Hydrogen (H2) has the lowest molar mass and thus the highest rate of diffusion according to Graham's law.
Correct Answer:
D
— H2
Learn More →
Q. Which of the following gases would have the highest root mean square speed at the same temperature?
A.
Oxygen (O2)
B.
Nitrogen (N2)
C.
Hydrogen (H2)
D.
Carbon Dioxide (CO2)
Show solution
Solution
Hydrogen (H2) has the lowest molar mass among the given gases, thus it will have the highest root mean square speed at the same temperature, as v_rms is inversely proportional to the square root of molar mass.
Correct Answer:
C
— Hydrogen (H2)
Learn More →
Q. Which of the following gates is a universal gate?
A.
AND
B.
OR
C.
NAND
D.
XOR
Show solution
Solution
The NAND gate is a universal gate because it can be used to create any other gate.
Correct Answer:
C
— NAND
Learn More →
Q. Which of the following gates is considered a universal gate?
A.
AND Gate
B.
OR Gate
C.
NAND Gate
D.
XOR Gate
Show solution
Solution
The NAND gate is considered a universal gate because it can be used to create any other gate.
Correct Answer:
C
— NAND Gate
Learn More →
Q. Which of the following gates is equivalent to an AND gate followed by a NOT gate?
A.
OR
B.
NAND
C.
NOR
D.
XOR
Show solution
Solution
The output of an AND gate followed by a NOT gate is a NAND gate.
Correct Answer:
B
— NAND
Learn More →
Q. Which of the following global organizations was established to promote international cooperation in the field of education, science, and culture? (1945)
A.
World Health Organization (WHO)
B.
United Nations Educational, Scientific and Cultural Organization (UNESCO)
C.
International Monetary Fund (IMF)
D.
World Trade Organization (WTO)
Show solution
Solution
UNESCO was established in 1945 to promote international collaboration in education, science, and culture.
Correct Answer:
B
— United Nations Educational, Scientific and Cultural Organization (UNESCO)
Learn More →
Q. Which of the following graphs represents a function that is neither increasing nor decreasing?
A.
A straight line with a positive slope
B.
A straight line with a negative slope
C.
A horizontal line
D.
A parabolic curve opening upwards
Show solution
Solution
A horizontal line represents a function that is constant, meaning it neither increases nor decreases.
Correct Answer:
C
— A horizontal line
Learn More →
Q. Which of the following graphs represents a function that is not one-to-one?
A.
A straight line with a positive slope.
B.
A parabola opening upwards.
C.
A horizontal line.
D.
A line with a negative slope.
Show solution
Solution
A parabola opening upwards is not one-to-one because it fails the horizontal line test; a horizontal line can intersect it at two points.
Correct Answer:
B
— A parabola opening upwards.
Learn More →
Q. Which of the following graphs represents a function that is strictly increasing?
A.
A graph that slopes downward from left to right.
B.
A graph that slopes upward from left to right.
C.
A horizontal line.
D.
A graph that has both increasing and decreasing intervals.
Show solution
Solution
A strictly increasing function is one where, for any two points x1 and x2, if x1 < x2, then f(x1) < f(x2), which is represented by a graph that slopes upward from left to right.
Correct Answer:
B
— A graph that slopes upward from left to right.
Learn More →
Q. Which of the following graphs represents a quadratic function?
A.
A straight line.
B.
A parabola opening upwards or downwards.
C.
A hyperbola.
D.
A circle.
Show solution
Solution
A quadratic function is represented by a parabola, which can open either upwards or downwards.
Correct Answer:
B
— A parabola opening upwards or downwards.
Learn More →
Q. Which of the following groups does not belong with the others?
A.
Apple
B.
Banana
C.
Carrot
D.
Grapes
Show solution
Solution
Carrot is a vegetable while the others are fruits.
Correct Answer:
C
— Carrot
Learn More →
Q. Which of the following groups exhibits a -I effect?
A.
-OH
B.
-NO2
C.
-CH3
D.
-Cl
Show solution
Solution
The -NO2 group is a strong electron-withdrawing group that exhibits a -I effect.
Correct Answer:
B
— -NO2
Learn More →
Q. Which of the following groups exhibits a strong +M effect?
A.
-NO2
B.
-OH
C.
-CN
D.
-COOH
Show solution
Solution
The -OH group exhibits a strong +M effect due to its ability to donate electron density through resonance.
Correct Answer:
B
— -OH
Learn More →
Q. Which of the following groups exhibits a strong -I effect?
A.
–NO2
B.
–CH3
C.
–OH
D.
–NH2
Show solution
Solution
The –NO2 group is a strong electron-withdrawing group and exhibits a strong -I effect.
Correct Answer:
A
— –NO2
Learn More →
Q. Which of the following groups has a -I effect?
A.
-NH2
B.
-F
C.
-OCH3
D.
-C2H5
Show solution
Solution
-F exhibits a -I effect as it withdraws electron density from the rest of the molecule.
Correct Answer:
B
— -F
Learn More →
Q. Which of the following groups has both +M and -I effects?
A.
-NH2
B.
-NO2
C.
-COOH
D.
-F
Show solution
Solution
The -NH2 group has a +M effect due to resonance donation and a -I effect due to its electronegativity.
Correct Answer:
A
— -NH2
Learn More →
Q. Which of the following groups has the strongest -I effect?
A.
-F
B.
-Cl
C.
-Br
D.
-I
Show solution
Solution
-F has the strongest -I effect due to its high electronegativity.
Correct Answer:
A
— -F
Learn More →
Q. Which of the following groups includes only multicellular organisms? (2018)
A.
Monera
B.
Protista
C.
Fungi
D.
Animalia
Show solution
Solution
The kingdom Animalia includes only multicellular organisms.
Correct Answer:
D
— Animalia
Learn More →
Showing 24181 to 24210 of 27860 (929 Pages)