Metals and Non Metals class 8

Which of the following is a noble metal?

• zinc

• aluminum

• gold

• iron

Which of the following is false about metals?

• They are malleable

• They form acidic solutions

• They are good conductors of both heat

  and electricity

• Sodium is an example of a metal

Which of the following metals can zinc replace in a displacement reaction?

• magnesium

• sodium

• aluminum

• lead

Which of the following is a non metal which is liquid at room temperature?

• mercury

• bromine

• all of the above

• none of the above

If an element conducts electricity but it is not lustrous or ductile, then it is probably a :

• metal

• non metal

• metalloid

• the information is not enough for us to decide a particular answer

Which of the following are not properties of metals?

• They are malleable

• They are mostly gaseous at room

  temperature

• They are dull

• They are sonorous

What is the chemical nature of non metal oxides?

• acidic only

• basic only

• neutral only

• both acidic and neutral

What is the chemical nature of metal hydroxides?

• basic

• acidic

• neutral

• acidic and neutral

Name any two metals which are so soft that they can be cut with a knife

Which of these non metals is used for water purification?

• iodine

• chlorine

• carbon

• bromine