Skip to main content

NCERT solutions for class 7 science - Acid

NCERT solutions for class 7 science - Acid

In this article, we will discuss the topic of Class 7 Science. We will discuss ‘Acid, Base, and Salt’.
Substances are divided into Acid, Base, and Salt.
ACID: The word Acid derives from Latin word ‘ACERE’ which means sour. Acid is sour in taste.Acid containing substances has sour in taste and the substance that sour in taste is called Acidic. The chemical nature of these substances is known as Acidic nature. For example – curd,orange juice,lemon, pickles, vinegar, etc.
Types of Indicator: There are two types of indicators:
Natural Indicator: Indicators that are derived from naturally occurring substance are called NATURAL INDICATORS. For example; turmeric, China rose,litmus, etc.
Synthetic Indicator/ Artifical indicators: Indicators that are prepared in the laboratory are known as SYNTHETIC INDICATORS. For example; methyl orange,phenolphthalein, etc.
BASE: Base is bitter in taste. Base containing substances has bitter in taste. The chemical nature of substances that contain base is known as BASE For example; baking soda, soap or soap solution, washing soda, etc.
NATURAL INDICATORS:

Use of Litmus paper to detect acid or base.
Acid– When blue litmus paper dipped in theacidic solution, the color of the litmus paper turns red.
Base- when the red color litmus paper dipped in a basic solution, the color of the litmus paper turns blue.
Turmeric: Turmeric is also used as a natural indicator. The color of the turmeric is yellow. When the Turmeric paper dipped into a basic solution, the paper turns red and does not change its color when it is dipped into acid.
Litmus: Litmus is extracted from Lichens. A lichen is a composite organism and Litmus is extracted from it. Lichens consist of algae and fungi living in a symbiotic relationship.
Read more ..... Class 7 Science Acid

We offer Class 6th to 10th  courses in both languages, English and Hindi. For more details log in with Takshila LearningCall us : 8800999280/8800999284 

Labels:

Comments

Post a Comment

Thank you we will contact ASAP.

Popular posts from this blog

Magnetic and non-magnetic material Class 6 Science

Magnetic and non-magnetic material  Class 6 Science A magnet is a substance that is drawn to certain magnetic materials like iron, cobalt, and nickel. Magnets have the ability to draw iron to them. Natural magnets are rocks that naturally draw iron. Non-magnetic materials include things like wood, rubber, coins, feathers, leather, etc. that are not drawn to iron. Magnet characteristics It pulls magnetic materials, such as iron. The magnet's two ends are referred to as its poles. The magnet's diametrically opposed poles are drawn together. Heating, hammering, or dropping causes it to lose its characteristics. On the basis of properties types of Magnets Temporary magnets are those magnets that are magnetic for only a little duration. Typically, iron, cobalt, or nickel are used to make them. When they are close to the powerful magnet, they act like a magnet. When they are yanked away from the powerful magnet, they stop being magnetic. Permanent magnets are magnets that have magne...
Post a Comment
Read more

What are Noble Gases? Example and noble gases name

What are Noble Gases? Example and noble gases name Noble Gases Noble gases, sometimes known as inert gases or erosions, are part of the modern periodic table's 18th group. This group is made up of the following individuals: Helium is a kind of gas (He) Neon (Ne) Argon is a gas (Ar) Krypton  (Kr) Xenon is a kind of xenon gas (Xe) Radon is a gas that can cause cancer (Rn) Noble gases exist in a gaseous state under typical temperature and pressure conditions. Because all noble gases have stable electronic structures, they have very little chemical reactivity. They are monoatomic gases that do not readily form molecules. 'ns2np6' represents the basic electrical configuration of noble gases. As a result, noble gases' outermost valence shells can be deemed 'complete.' The chemical inertness of the group of 18 elements is due to this. Because of the stability of certain elements, these gases form a group. These stable elements' crusts are totally filled. Regardles...
Post a Comment
Read more

CS Executive

At  Takshila Learning  we provide you Video Lecture of best faculties in India. We assure you not only the best quality of videos but also best content. Our teachers way of teaching, presentation and explanation is very simple and unique. Why Takshila Learning? We can give you 10 top reasons why you should take CS Executive Online Video Coaching Classes Lectures from Takshila Learnings. We are providing online classes of CS Executive for last 5 years (almost  oldest in the market ) We pick  best teachers  for every subjects. We don’t provide updates only with old videos. Infact we provide  new updated classes  for every attempt Our teachers update notes for every attempt. Videos and notes are  highly exams oriented . Our teachers  cover last 5 attempts question papers  along with ICSI Course content. Our video classes  includes live practical examples  to help you understand easily. Our structure of our  fee ...
Post a Comment
Read more