NCERT Solutions for Class 7 Science Chapter 4: Heat

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NCERT Solutions for Class 7 Science Chapter 4 Heat are provided in the article below. The important topics that are included in this chapter are:

Hot and Cold
Measuring Temperature
Laboratory Thermometer
Transfer of Heat

Download PDF: NCERT Solutions for Class 7 Science Chapter 4 Heat

NCERT Solutions for Class 7 Science Chapter 4

NCERT Solutions for Class 7 Science Chapter 4 Heat are provided in the PDF below:

Class 7 Science Chapter 4 Heat: Important Topics

Heat is one of the essential forms of energy for the survival of life on earth. Transfer of heat takes place from one body to another due to differences in temperature as per thermodynamics. We use heat energy for various activities like cooking, ironing, transportation, recreation, etc. Temperature is the measure of the hotness or coldness of the body. Celsius (C) or Fahrenheit (F) scale, or in Kelvins (K).

Measuring Temperature

Temperature measurement is referred to as the process of measuring a current local temperature for immediate or later evaluation. Temperature is measured with the help of a device called a thermometer. The three units in which temperature is measured are Celsius, Fahrenheit, and Kelvin. Hence, there are three different scales for measuring temperature.

Laboratory Thermometer

A laboratory thermometer, which is used for measuring temperatures other than the human body temperature, is colloquially known as the lab thermometer. It ranges from -10˚C to 110˚C. Laboratory thermometers are designed for lab purposes such as checking the boiling point, freezing point, or temperature of other substances.

Transfer of Heat

Heat transfer, any or all of several kinds of phenomena, is considered a mechanism, that conveys energy and entropy from one location to another. The specific mechanisms are usually referred to as convection, thermal radiation, and conduction.

Chapter Related Links:

Heat Capacity	Hess’s Law of Constant Heat Summation	Heat engines
Latent Heat	Specific heat capacity	Heat transfer

Class 7 Science Study Guides:

CBSE Class 7 Science NCERT Textbook	NCERT Solutions	CBSE Class 7 Science Sample Paper

CBSE X Related Questions

1.
Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements.
Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

2.
The gases evolved on heating lead (II) nitrate crystals are :

NO and \( O_2 \uparrow \)
\( N_2 \) and \( NO_2 \)
\( NO_2 \) and \( H_2 \)
\( NO_2 \) and \( O_2 \)

View Solution

3.
Identify the correct statement for spirogyra, leishmania and hydra

they reproduce sexually.
they are unicellular.
they are multicellular.
they reproduce asexually.

View Solution

4.
On reaction with dilute HCl, which of the following pair of metals will evolve hydrogen gas?

Copper and zinc
Copper and iron
Silver and magnesium
Magnesium and aluminium

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5.
Assertion : Reaction of quick lime with water is an exothermic reaction. Reason (R): A large amount of heat is evolved on the reaction of quick lime and water.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

6.
(i) \( \text{AgNO}_3 + \text{NaCl} \rightarrow \text{NaNO}_3 + \text{AgCl} \)
(ii) \( \text{K}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + 2\text{KCl} \)
Which of the following options clearly describes both the reactions?

(i) is double displacement, (ii) is displacement reaction.
Both, (i) and (ii) are displacement reactions and precipitation reactions.
Both, (i) and (ii) are double displacement reactions and precipitation reactions.
(i) is displacement, (ii) is double displacement reaction.

View Solution

NCERT Solutions for Class 7 Science Chapter 4: Heat

NCERT Solutions for Class 7 Science Chapter 4

Class 7 Science Chapter 4 Heat: Important Topics

Measuring Temperature

Laboratory Thermometer

Transfer of Heat

CBSE X Related Questions

1.
Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements.
Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

2.
The gases evolved on heating lead (II) nitrate crystals are :

3.
Identify the correct statement for spirogyra, leishmania and hydra

4.
On reaction with dilute HCl, which of the following pair of metals will evolve hydrogen gas?

5.
Assertion : Reaction of quick lime with water is an exothermic reaction. Reason (R): A large amount of heat is evolved on the reaction of quick lime and water.

6.
(i) \( \text{AgNO}_3 + \text{NaCl} \rightarrow \text{NaNO}_3 + \text{AgCl} \)
(ii) \( \text{K}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + 2\text{KCl} \)
Which of the following options clearly describes both the reactions?

Similar Science Concepts

Comments

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NCERT Solutions for Class 7 Science Chapter 4: Heat

NCERT Solutions for Class 7 Science Chapter 4

Class 7 Science Chapter 4 Heat: Important Topics

Measuring Temperature

Laboratory Thermometer

Transfer of Heat

CBSE X Related Questions

1.Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements. Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

2.The gases evolved on heating lead (II) nitrate crystals are :

3.Identify the correct statement for spirogyra, leishmania and hydra

4.On reaction with dilute HCl, which of the following pair of metals will evolve hydrogen gas?

5.Assertion : Reaction of quick lime with water is an exothermic reaction. Reason (R): A large amount of heat is evolved on the reaction of quick lime and water.

6.(i) \( \text{AgNO}_3 + \text{NaCl} \rightarrow \text{NaNO}_3 + \text{AgCl} \) (ii) \( \text{K}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + 2\text{KCl} \) Which of the following options clearly describes both the reactions?

Similar Science Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Assertion (A): Carbon shares its valence electrons with other atoms of carbon or with atoms of other elements.
Reason (R): The shared electrons belong to the outermost shells of both the atoms and lead to both atoms attaining the noble gas configuration.

2.
The gases evolved on heating lead (II) nitrate crystals are :

3.
Identify the correct statement for spirogyra, leishmania and hydra

4.
On reaction with dilute HCl, which of the following pair of metals will evolve hydrogen gas?

5.
Assertion : Reaction of quick lime with water is an exothermic reaction. Reason (R): A large amount of heat is evolved on the reaction of quick lime and water.

6.
(i) \( \text{AgNO}_3 + \text{NaCl} \rightarrow \text{NaNO}_3 + \text{AgCl} \)
(ii) \( \text{K}_2\text{SO}_4 + \text{BaCl}_2 \rightarrow \text{BaSO}_4 + 2\text{KCl} \)
Which of the following options clearly describes both the reactions?