true

Find the best tutors and institutes for Class 10 Tuition

Find Best Class 10 Tuition

No matching category found.

No matching Locality found.

Outside India?

Search for topics

Post a Lesson

All

All

Lessons

Discussion

Answered on 01 Jun CBSE/Class 10/Science

Asok Kumar P

20 years experience teaching Class 8 to 12 Physics,Chemistry and Mathematics and NEET/JEE/KEAM Coac

Hydrogen gas is obtained Fe+H2SO4-FeSO4+ H2
Dislike Bookmark

Answered on 03 May CBSE/Class 10/Science

Edukendra Classes

For the syllabus, please visit the Jagranjosh education column. The chapter I recommend to start with is SI units, introduction to scalar and vector quantities, periodic table concerning metals and non-metals, cell and life cycle, etc. These are some fundamental topics to make a conceptual base.
Dislike Bookmark

Lesson Posted on 02/12/2020

Vidhya T.

I specifically teach Science for STD X CBSE. Have total of 3 years experience in teaching (both online...

Chemical Reactions & Equations Chemical Reactions: change in colour, state, the evolution of gas, change in temperature Chemical Equation: Shorter way, concise & useful instead of using words Representation: Reactions, Products, Arrow Head Skeletal chemical equations: Mg + O2 ->... read more

# Chemical Reactions & Equations

## Chemical Reactions:

• change in colour, state, the evolution of gas, change in temperature

## Chemical Equation:

• Shorter way, concise & useful instead of using words
• Representation: Reactions, Products, Arrow Head [include pressure, temperature, catalyst, etc.]
• Skeletal chemical equations: Mg + O2 -> MgO
• Balanced chemical equations: 2Mg + O2 -> 2MgO

## Types of Chemical Reactions:

1. Combination
2. Decomposition
3. Displacement
4. Double Displacement
5. Redox
6. Exothermic
7. Endothermic

### Combination:

CaO + H2O -> Ca(OH)2

Ca(OH)2 + CO2 -> CaCO3 + H2O

### Decomposition:

1. Thermal: CaCO3 --heat--> CaO + CO2
2. Photochemical: AgCl --light--> Ag + Cl2
3. Electrolysis: H2O --electricity--> H2 + O2

### Displacement:

Fe + CuSO4 --> Fe(SO)4 + Cu

Elements of higher reactivity displace elements of lesser reactivity. Fe > Cu

### Double Displacement:

Na2(SO)4 + BaCl2 --> BaSO4 + NaCl (this is a precipitation reaction as well)

### Redox: Reduction Oxidation

Reduction means the removal of Oxygen (or) addition of hydrogen

Oxidation means the addition of Oxygen (or) removal of hydrogen

2Cu + O2 --heat--> 2CuO [oxidation]

CuO + H2--> Cu + H2O [reduction CuO to Cu, oxidation H2 to H2O]

### Exothermic:

#### Burning of natural gas

CH4 + O2 --> CO2 + H2O

#### Respiration

C6H12O6 + O2 --> CO2 + H2O + energy

### Endothermic:

ZnCO3 + Heat absorbed --> ZnO + CO2

Effect of Chemical Reactions:

### Corrosion:

• undesirable change that occurs in metals in the presence of moisture, acids, bases & air
• Fe + H2O --> Fe2O3.nH2O

### Rancidity:

• undesirable change that takes place in oil-containing food
• Chips: flushing out with air prevents oxidation of fatty acids.

### Tarnishing:

• Silver reacts with sulphides in the atmosphere (e.g. mercuric sulphide) to form a black layer of silver sulphide.
• Toothpaste to it to remove the tarnish regains its colour.
Dislike Bookmark

Looking for Class 10 Tuition

Find best Class 10 Tuition in your locality on UrbanPro.

FIND NOW

Sayak Bhattacharya

Calcutta Homeopathy Medical College and Hospital student...I passed my ISC from The Assembly of god

• Artificial Hybridization - in which one can select better parental plants, cross-pollinate them and select among the progenies to get one which will help in increasing the yield or one which will be pest and disease resistant • Genetic Engineering- this branch of modern science is used to... read more

• Artificial Hybridization - in which one can select better parental plants, cross-pollinate them and select among the progenies to get one which will help in increasing the yield or one which will be pest and disease resistant

• Genetic Engineering- this branch of modern science is used to produce genetically modified plants which will be wide yielding variety and will also show resistance to disease and pest

• Scientific Crop Management Practice- Which involves superior irrigation facilities, use of fertilizer containing both micro and macronutrient in an appropriate amount and protecting the crop from pest and insects.

Dislike Bookmark

Sumit Hajela

I am a master degree holder in computer application . I have been teaching home tuition since 2004...

The electric motor is a device that converts electrical energy to mechanical energy. Parts of an Electric Motor Insulated Copper wire: A rectangular coil of wire. Magnet Poles: A magnet as placed above, i.e. the North Pole and the South Pole. This creates a magnetic field, as shown above. Split... read more

The electric motor is a device that converts electrical energy to mechanical energy.

Parts of an Electric Motor

• Insulated Copper wire: A rectangular coil of wire.
• Magnet Poles: A magnet as placed above, i.e. the North Pole and the South Pole. This creates a magnetic field, as shown above.
• Split Rings: Two disjoint C-shaped rings. It acts as a commutator (which can reverse the direction of current)
• Axle: The split rings are placed on the axle which can rotate freely.
• Brushes: The outside of the split rings are connected to conducting brushes X and Y.
• Source Battery: To source current.

The principle of an electric motor:

The electric motor works on the principle of force experienced by a current-carrying conductor in a magnetic field.
Two forces of equal magnitude act in the opposite direction on the two parallel sides of the coil. Since they act along different lines, they cause rotational motion.

Applications

• Electric Fans
• Refrigerators
• Mixers
• Washing machines
Dislike Bookmark

Suranjana

I am a teacher having experience of 19 years, in undergraduate Engineering college. Also I am experienced...

Lavoisier and Davy studied the terms acids bases and salts.Acids: “Acid” word derived from the Latin word “Acidus” means SOUR. Compulsorily have hydrogen H+ is present in the form of H3O+ when dissolved in water. Turns Blue litmus redDefinition:Acids are defined as the compounds... read more

Lavoisier and Davy studied the terms acids bases and salts.
Acids:
 “Acid” word derived from the Latin word “Acidus” means SOUR.
 Compulsorily have hydrogen
 H+ is present in the form of H3O+ when dissolved in water.
 Turns Blue litmus red
Definition:
Acids are defined as the compounds which contain one or more hydrogen atoms and when dissolved in water, produce hydronium ions (H3O+), the only positively charged ions.
Examples: Hydrochloric acid (HCl), Sulphuric Acid (H2SO4), Nitric Acid (HNO3), Acetic Acid (CH3COOH) etc.
According to the ionic theory, an acid is a compound which, when dissolved in water yields hydronium ions (H3O+)as the only positively charged ions.
HCl →  H+ + Cl- (Chloride ion)

H+ + H2O → H3O+ (Hydronium ion or simply H+)

Dislike Bookmark

Lesson Posted on 22/08/2020 CBSE/Class 10/Science

Altaf Fakir

I am working as assistant professor of physics. I have completed Post graduation in physics subject....

Dislike Bookmark

P V Rao

I am P V Rao, an experienced educator and teacher with more than 30 years of teaching experience

2O refers to two atoms of oxygen. O2 refers to a molecule of oxygen. Atoms are not stable. So, they combine to form molecules.
Dislike Bookmark

Manas Kumar Karn

Experienced English spoken and motivational speaker with 100% positive feedback.

It's very controvertial if I say that they might touch each other because they influence each other.
Dislike Bookmark

Looking for Class 10 Tuition

Find best Class 10 Tuition in your locality on UrbanPro.

FIND NOW

Answered on 14 Jan CBSE/Class 10/Science Tuition/Class IX-X Tuition

Noor

It is a property of a conductor which opposes the flow of charges through them and two metals which are highly resistant (i) gold and (ii) platinum
Dislike Bookmark

UrbanPro.com helps you to connect with the best Class 10 Tuition in India. Post Your Requirement today and get connected.

Overview

Questions 500

Lessons 81

Total Shares

180,427 Followers

## Top Contributors

Connect with Expert Tutors & Institutes for Science

## Class 10 Tuition in:

x

X

### Looking for Class 10 Tuition Classes?

Find best tutors for Class 10 Tuition Classes by posting a requirement.

• Post a learning requirement
• Get customized responses
• Compare and select the best

### Looking for Class 10 Tuition Classes?

Find best Class 10 Tuition Classes in your locality on UrbanPro

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more