Materials Metals and Non-metals MCQ

Materials Metals and Non-metals MCQ Class 8 Chapter 4

Identify the none-metal here

  • a. Sodium
  • b. Zinc
  • c. Carbon
  • d. Copper
c. Carbon

Which one of the following is not a characteristics of a metal?

  • a. Malleablity.
  • b. Ductility.
  • c. Good conductor of electricity
  • d. Brittle.
d. Brittle.

An iron nail can be beaten into a sheet. The property is:

  • a. Malleability.
  • b. Ductility.
  • c. Good conductor of electricity
  • d. Brittle.
d. Malleability.

Metal used in home wire is:

  • a. Copper
  • b. Aluminium
  • c. Silver
  • d. Gold

a. Copper
Silver is the best conductor of electricity but is very costly. So we do not use them. Copper is the best alternative to silver. Aluminium has lesser electrical conductivity then copper, so, they getting replace by copper.

Which metal remain liquid at room temperature

  • a. Copper
  • b. Aluminium
  • c. Silver
  • d. Mercurry
d. Mercurry

Which metal catches fire easily

  • a. Copper
  • b. Silver
  • c. Mercurry
  • d. Sodium

d. Sodium
Sodium and potassium are highly reactive metals. They burn spontaneously in atmosphere with sound.

In rusting iron read with which element ?

  • a. Carbon dioxide
  • b. Oxygen
  • c. Nitrogen
  • d. Helium

b. Oxygen
Iron + Oxygen → Iron oxide

Metal oxides are

  • a. Acidic
  • b. Basic
  • c. Neutral
  • d. None

b. Basic
Metal oxides with water for metal hydroxides (MOH). Molecules that donate OH¯ group are basic

Metal oxides will turn which colour of litmus papaer

  • a. Blue to red
  • b. Red to blue
  • c. Does not change the colour

b. Red to blue
Basic substances changes red litmus into blue, and metal hydroxides are basic.

Does other metals also rust in air

  • a. Yes
  • b. No

a. Yes
Yes, other metals also react with oxygen and form metal oxides. The process is similar to rusting of iron. e.g. Copper vessels get black spots on reaction with air.

Highly reactive metals among these are

  • a. sodium, poassium
  • b. Silver, gold
  • c. Copper, iron
  • d. All three

a. sodium, poassium
Yes, other metals also react with oxygen and form metal oxides. The process is similar to rusting of iron. e.g. Copper vessels get black spots on reaction with air.

Oxides of non-metal are

  • a. Basic
  • b. Acidic
  • c. Neutral
  • d. None

b. Acidic
Oxides of non-metals form hydrogen compounds with water.

eg. SO2 (Sulphur dioxide)+ H2O (water) → H2SO3 (Sulphurus acid)

A compound with free H+ is acidic. It turns blue litmus into red

Metals reacts with acids to form salts. During this process which gas liberates?

  • a. Hydrogen
  • b. Chlorine
  • c. Sulphur
  • d. Oxygen
a. Hydrogen
M (metal) + HA (acid) → MA (salt) + H2↑(hydrogen gas) 

In double displacement reaction, which metal replaces another metal from its salt?

  • a. Highly reactive metal
  • b. Lesser reactive metal
  • c. Inert metals
  • d. None
a. Highly reactive metal
Materials Metals and Non-metals MCQ
Reactivity series of metals

 

See also:

Synthetic fibres and Plastics MCQ

Microorganisms Friend or foe MCQ

Crop Production and Management MCQ

Materials Metals and Non-metals MCQ Class 8 Chapter 4

 

Ref: Chapter 4.

 

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