Grade 7 (exam 2 )

....................is an example of sedimentary rocks.

• Granite

• Basalt

• Sandstone

• Marble

Sodium hydroxide molecule is considered as.........................

• an acid

• a base

• an oxide

• a salt

All non-metals don't conduct electricity, except.................

• bromine

• graphite

• sulphur

• phosphorus

There is a triple covalent bond in.............................molecule.

• nitrogen

• oxygen

• chlorine

• hydrogen

The chemical formula of sodium hydroxide compound....................

• NaOH

• NaNO3

• Na2O

• Na2co3

From sandstone properties that it has......................

• white color

• coarse texture

• smooth texture

• all answers

...............................are examples of sedimentary rocks.

• Granite and basalt

• Marble and sandstone

• Sandstone and limestone

• Basalt and limestone

From insoluble salts.................................

• silver chloride

• sodium chloride

• sodium carbonate

• calcium nitrate

..................is produced from conversion of limestone.

• Granite

• Marble

• Basalt

• Sandstone

The valency of ferrous is.............................

• zero

• monovalent

• divalent

• trivalent