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Chemistry
Which of the following is an alkali metal?
A
Sodium
B
Calcium
C
Aluminum
D
ron
Correct Answer
A
Chemistry
Which element is essential for the formation of hemoglobin?
A
Calcium
B
Iron
C
Sodium
D
Sodium
Correct Answer
B
Chemistry
Which gas is known as laughing gas?
A
Nitrogen
B
Nitrous oxide
C
Carbon monoxide
D
Sulfur dioxide
Correct Answer
B
Chemistry
What is Avogadro's number approximately equal to?
A
6.022 Ć 10Ā²Ā³
B
3.011 Ć 10Ā²Ā³
C
9.8 Ć 10Ā²Ā³
D
1.602 Ć 10Ā¹?
Correct Answer
A
Chemistry
What is the SI unit of amount of substance?
A
Gram
B
Mole
C
Liter
D
Kilogram
Correct Answer
B
Physics
Newton's first law is also called the law of:
A
Acceleration
B
Inertia
C
Gravitation
D
Momentum
Correct Answer
B
Physics
The unit of electric resistance is:
A
Volt
B
Amphere
C
Ohm
D
Coulomb
Correct Answer
C
Physics
Newton's first law is also called the law of:
A
Acceleration
B
Inertia
C
Gravitation
D
Momentum
Correct Answer
B
Physics
The acceleration due to gravity on Earth is approximately
A
5.8 m/sĀ²
B
8.9 m/sĀ²
C
9.8 m/sĀ²
D
12.8 m/s
Correct Answer
C
Physics
The frequency of a sound determines its:
A
Loudness
B
Pitch
C
Speed
D
Energy
Correct Answer
B