Compounds or mixtures(2020)

Compounds or mixtures(2020)

Multiple Select

Identify the mixtures from the following?

Multiple Choice

Identify the two elements present in water.

• hydrogen and helium

• oxygen and helium

• hydrogen and oxygen

• only oxygen

Multiple Choice

Which one of the following defines the term: compound.

• Two or more elements chemically combined together

• Only one element chemically combined together

• No elements chemically combined together

Multiple Choice

A word equation is used to describe a chemical reaction.

• true

• false

Multiple Choice

___________________ is produced by burning carbon in oxygen.

• Carbon monoxide

• Carbon

• Carbon dioxide

Fill in the Blank

_____________________ are formed by chemical reactions.

Multiple Select

Chemical reactions involve the exchange of energy in the form of:

• heat only

• heat and air

• heat, light or both

• only light

Fill in the Blank

In the given image _______________ is soft and highly reactive metal.

Multiple Choice

A compound is broken down through a chemical method known as ____________________.

• decomposition

• evaporation

• equation

Multiple Choice

Copper chloride can be split into ____________ and _____________.

• copper and chloride

• copper and oxide

• copper and chlorine

• copper and oxygen

Fill in the Blank

Elements in a compound are in a fixed proportion by ____________.

Multiple Select

Tick the common properties of a compound from the following.

• involves exchange of energy

• properties are same like its constituent elements.

• can be broken down only through a chemical method.

• the proportion is fixed by mass.

Fill in the Blank

When magnesium ribbon burns in oxygen ___________________ compound is formed.

Multiple Choice

Which one of the following is not a compound?

• Magnesium

• Nitrogen oxide

• Nitrogen dioxide

• Ammonia

Fill in the Blank

Element + element ------> _______________ .

Multiple Choice

Colourless nitrogen oxide combines with colourless oxygen to form brown fumes of ______________________.

• Nitrogen monoxide

• Nitrogen

• Nitrogen dioxide

Multiple Choice

Ammonium chloride is formed by chemically combining ________________________ .

• a compound and an element

• two elements

• two compounds

Multiple Select

Identify the mixtures from the following images.

Fill in the Blank

___________ is a mixture of elements as well as compounds.

Fill in the Blank

___________________ is a mixture of aluminium, copper, magnesium and manganese.

Multiple Choice

A mixture is defined as :

• Two or more substances which are chemically combined.

• Two or more substances which are not chemically combined.

Multiple Choice

The substances in a mixture can be mixed :

• in a fixed proportion by mass.

• in any proportion by mass.

Fill in the Blank

A mixture can be separated into its components by ______________ means like evaporation, filtration etc.

Multiple Select

Little or no energy exchange will take place during the formation of mixtures.

• True

• False

Poll

Which part of the lesson was interesting to know and learn?

• formation of compounds

• properties of mixtures and compounds

• word equation

• useful mixtures