Give an Example of a Metal Which is the Best Conductor of Heat. - Science


Give an example of a metal which is the best conductor of heat.



Metal that is the best conductor of heat → Silver, Gold

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Chapter 3: Metals and Non-metals - Intext Questions [Page 40]


NCERT Science Class 10
Chapter 3 Metals and Non-metals
Intext Questions | Q 1.3 | Page 40


Classify the following elements into metals, non–metals and metalloids: C, Mg, Si, S, Hg, As.

Write any three differences between metals and non-metals with respect to their physical properties.

Which of the following can be beaten into thin sheets?

Which of the following statements is correct?

Fill in the blanks:

Phosphorus is a very _________ non-metal.

Fill in the blanks:

Iron is ________ reactive than copper.

Mark ‘T’ if the statement is true and ‘F’ if it is false.

Coal can be drawn into wires. ( )

Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties

Properties Metals Non-metals
1. Appearance Lustrous Dull
2. Hardness Hard Soft
3. Malleability Can be beaten into thin sheets Cannot be beaten into thin sheets
4. Ductility Can be drawn into wires Cannot be drawn into wires
5. Heat Conduction Good conductors of heat Poor conductors of heat
6. Conduction of Electricity Good conductors of electricity Poor conductors of electricity

Give reasons for the following.

Immersion rods for heating liquids are made up of metallic substances.

Match the substances given in Column A with their uses given in Column B.

  A   B
1 Gold a Thermometers
2 Iron b Electric wire
3 Aluminium c Wrapping food
4 Carbon d Jewellery
5 Copper e Machinery
6 Mercury f Fuel

One day Reeta went to a jeweller’s shop with her mother. Her mother gave an old gold jewellery to the goldsmith to polish. Next day when they brought the jewellery back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss in weight?

Choose the correct answer from the options given below :

The two main metals in Bronze are:

(A) Copper and zinc

(B) Copper and lead

(C) Copper and nickel

(D) Copper and tin

If an element has a low ionization energy then it is likely to be ______________ (metallic / non metallic).

Choose the most appropriate answer of the following:

This is not an alloy of copper:

(A) Brass

(B) Bronze

(C) Solder

(D) Duralumin.

Why are metals used for making cooking vessels?

Write a balanced chemical equation for the action of heat on aluminium hydroxide.

Name the metal which is the poorest conductor of heat.

Which metal foil is used for packing some of the medicine tablets?

Which property of iron metal is utilised in producing iron sheets required fro making buckets?

What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.

State five uses of non-metals.

How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?

State three reasons (of which at least one must be chemical) for believing that sodium is a metal.

State three reasons (of which at least one must be chemical) for believing that sulphur is a non-metal.

Which of the following non-metal is a liquid?
(a) carbon
(b) sulphur
(c) bromine
(d) iodine

Name a metal used in making electric cables 

Name a non-metal that is used for filling into electric bulbs 

Name a non-metal that is liquid at room temperature   

 Fill in the blank: 

A metal stored in kerosene oil is _______

Write ‘true’ or ‘false’ for the following statement 

Sodium can be cut with a knife.  

Match the statements in Column A, with those in Column B .

   Column A   Column B 
1 A metal used for making high quality mirrors . a Chlorine 
2 A metal which neither malleable nor ductile.  b Graphite 
3 A non-metal,used in the sterilsation of water.  c Iodine 
4 A non-metal, whose deficiency can lead to disease like goitre.  d Silver 
5  A non -metal which can be used as dry lubricant.  Zinc

Tick (√) the most appropriate answer.
Copper metal is used in :

Name a metal which can be cut with a knife : 

Name a metal which is poor conductor of electricity :   

Name a non-metal which is liquid form at room temperature.

Name a non-metal which is good conductor of electricity.  

State two important uses of following non-metal 

Uses of chlorine  

What is an alloy? 

Why are alloys made?  

Select from the following ist:

`Fe_2O_3, , NO, PbO, Mn_2O_7`

Basic oxide………..


the most abundant metal and the most abundant non=metal

Give the balanced reactions for the following:

Red hot iron reacts with steam

How many valence electrons are present in:

(i) metals and

Which metals do not corrode easily?

Make pairs of substances and their properties

Substance Property
a. Potassium bromide (KBr) 1. Combustible
b. Gold 2. Soluble in water
c. Sulphur 3. No chemical reaction
d. Neon 4. High ductility.

In which of the following industries, microbial enzymes are not used?
a) Glass industry.
b) Cheese industry
c) Tanning industry.
d) Paper industry.

Complete the table.

 Property of metal  Use in everyday life
 i. Ductility  
 ii. Malleability  
 iii. Conduction of heat  
 iv. Conduction of electricity  
 v. Sonority  

Identify the odd term.

Identify the odd term

Ductility, brittleness, sonority, malleability

Identify the odd term.

Identify the odd term.

Brass, bronze, iron, steel

Write scientific reason.

The stainless steel vessels in Kitchen have copper coating on the bottom.

Write scientific reason.

Copper and brass vessels are cleaned with lemon.

Write scientific reason.

Sodium metal is kept in kerosene.

What are the metals that make the alloys brass and bronze?

Three experiments to study the process of rusting are given below. Observe the three test tubes and answer the following questions.

A. Why the nail in the test tube 2 is not rusted?
B. Why is the nail in the test tube  1 is rusted highly?
C. Would the nail in the test tube 3 get rusted?

Which metal occurs as: An oxide also give the name of their respective ore.

Choose the correct option:

A metallic oxide which cannot be reduced by normal reducing agents:

Fill in the Blank and Rewrite the Statements:

Elements showing properties of both metals and nonmetals are known as _________.

Classify the given elements into metals, non - metals, and metalloids. :
Carbon, Boron, Sodium, Oxygen.

Ankita bought some Glucose Powder. She felt is was adulterated with starch powder. How would she test it?

Gold and silver are used to make jewellery. Give reason

Geeta dipped a copper coin in a solution of silver nitrate. After some time she saw the silver shine on the coin. Why? Give the balanced chemical equation for the same and name the type of reaction.

If the electronic configuration of metal A is (2, 8, 1) and that of metal B is (2, 8, 2) then:
a. Which metal is less reactive?
b. Write the names of the two metals.
c. Write the balanced chemical equation of the reaction of anyone metal with hydrochloric acid.

Name the following: 
An Alloy of copper and Zinc.

Match the following:

Column A Column B
(a) Helium (1) Electric bulb
(b) Neon (2) Thermometer
(c) Argon (3) Semiconductor
(d) Germanium (4) Weather balloons
(e) Mercury (5) Advertising signboards

Give reason for the following:

Potassium reacts vigorously with cold water while copper does not react with water or steam.

Give reason for the following:

Rusting reduces the structural strength of iron.

Select the appropriate option for the following statement:

The element which shows properties of both metals and non-metals.

State whether the statement given below is true or false. If false write the correct statement.

Lead pencils contain lead.

_______ is basic oxide.

The sound of one metal colliding with another makes a noise, this property is called as _______.

_______ is good conductor of heat but bad conductor of electricity.

Match the columns.

Group A Group B
1. Making sheets of metals a) Sonority
2. Making metal utensils b) Malleability
3. Making Copper wires c) Good conductor of heat
4. Making bells from metal d) Ductility

Write the name.

Nonmetal which is a good conductors of electricity.

Write the name.

The reagent which dissolves noble metals.

Identify who I am!

Carbon allotropes- _______

Identify who I am!

Amphoteric oxide forming metal- _______

Identify who I am!

Metal in Liquid state- _______

Give two examples of alloy.

Distinguish between:

Metals - Nonmetals (physical characteristics)

Oxygen, hydrogen, and sulphur are examples for 

______ is the only non-metal which conducts electricity.

A form of non-metal which has high ductility is

Pencil lead contains

Melting point of most metal is ______ than non-metal.

Which non-metal is essential for our life and all living beings?

Tabulate the differences between metals and non-metals.

Name six common non-metals and write their symbols.

Non-metals are non-malleable.

Non-metals are usually good conductors of heat and electricity.

Match the following:

1. Non-metals a. Silicon
2. Metals b. fire extinguisher
3. Metalloids c. dull and soft
4. Oxygen d. hard and shiny
5. Water e. supports fire

Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is non-metal?

Which non-metal is essential for our life and all living beings inhale it during breathing?

The metal is stored in kerosene ______.

The non – metal which is liquid at room temperature is ______.

Compounds obtained from non–living sources are called ______.

Reason out

Sulphur is used in the vulcanization of rubber.

Reason out

Mercury is the only metal that is liquid at room temperature.


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