Chemistry Quiz - Semester I

How many moles of OXYGEN are in 18 g of water?

• 0.5

• 1

• 2

• 18

What is the name of the law that states the mass ratio of a specific compound remains constant?

• Dalton's Law

• Graham's Law

• Law of Multiple Proportions

• Law of Definite Proportions

How many molecules are in 88 g of CO₂?

• 6.022 × 10²³

• 12.044 × 10²³

• 3.011 × 10²³

• 22.4

Explain the bond length of a hydrogen atom.

• Hydrogen atom

• Helium atom

• Multi-electron atom

• Other

What is the maximum electron capacity of d-orbitals?

• 2

• 6

• 10

• 14

The uncertainty principle of hydrogen relates to?

• Mass and charge

• Position and mass

• Mass and volume

• Position and energy

What is the electronic configuration of an oxygen atom?

• 1s²2s²2p⁴

• 1s²2s²2p³

• 1s²2s²2p⁶

• 1s²2s¹2p⁵

Which orbital shape is spherical?

• s

• p

• d

• f

According to 'Hund’s rule'?

• Electrons fill orbitals singly first

• Each orbital gets one electron first

• Electrons pair up in orbitals

What is the shape of the orbital 1s²2s²2p⁶?

• s

• p

• d

• f