Give the Name of the Radical - Oh

Give the name of the radical - OH

One Word/Term Answer

OH – hydroxide

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Chapter 4: Elements, Compounds, Symbols And Formulae - Additional Questions For Practice

Chapter 4 Elements, Compounds, Symbols And Formulae
Additional Questions For Practice | Q 20.2

Match the columns.

column A	column B
1. to separate grain from chaff	a. filtration
2. to saparate sawdust from water	b. sedimentation and deeantation
3. to separate iodine from sodium chloride	c. winnowing
4. to separate iron fillings from sand	d.sublimation
5. it is used to separate sand and water	e maganetic separation
	f .handpicking

Define a pure substance. How many types of pure substances do you know?

Mention three gaseous elements and write their molecular formulae

Select the correct answer from the choice given below.
The type of molecule- bromine

Select the correct answer from the choice given below.
An impure substance

Write the names of elements from the following symbol:

Select the correct answer from A, B, C, D & E for the statement given below :

A non-metal that is lustrous.

Select the correct answer from A, B, C, D & E for the statement given below :

A mixture consisting of elements & a compound.

Classify the substances given in Fig. 2.2 into elements and compounds

Name the constituents of water.