Chemistry MOCK ACP Sem 1

Front

What distinguishes solids from other states of matter?

Back

Solids maintain an ordered pattern of particles.

Front

How does a gas behave in a sealed container?

Back

A gas takes the shape and the volume of the container in which it is confined.

Front

How do you calculate the number of molecules in a given mass of a substance?

Back

Use the formula: Number of molecules = (mass in grams / molar mass) x Avogadro's number.

Front

What is the relationship between frequency and energy of electromagnetic waves?

Back

Higher frequency waves have more energy.

Front

What is the Lewis dot structure for magnesium sulfide (MgS)?

Back

Mg: •, S: •• •• (Mg donates 2 electrons to S).

Front

What is the definition of a mole in chemistry?

Back

A mole is defined as 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the principle of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and defines the element.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.