The video on solving upstream and downstream rowing of boat.

 

CBSE, Class -10, Reference Book

PHYSICS: 

Question practice: 1. CBSE exemplars 2. Sample papers (Arihant, Oswal publisher) 

Theory: 1.S.Chand 

MATHS: 

Question practice: 1. CBSE exemplars 2. Secondary school Mathematics by RS Agarwal 3. Mathematics by RD Sharma has lots of examples. 4. Sample papers (Arihant, Oswal publisher) 

CHEMISTRY: 

Question practice: 1. CBSE exemplars 2. Sample papers (Arihant, Oswal publisher) 

Theory: 1. S.Chand 

QUESTION ANSWERS: 

1.Question bank by Oswal publisher, 

2.Together with, 

3. All in one by Arihant

For Higher practice: Use the ICSE books 

Our Centre provides different types of question practice according to need (like before the exam, understanding of the student, etc).

Class 10 CBQ, Mathematics

Reactive Metal Sodium (Na)

Sodium is the sixth most common element on Earth, and makes up 2.6% of the Earth's crust.

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Properties of Sodium:

It is soft in nature that can be cut with a knife

It is a highly reactive metal.

It is important for many different functions of the human body. It helps cells to transmit nerve signals and regulate water levels in tissues and blood.

Electro valency of Sodium is +1

Valence electron of Sodium is 1

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Some more details on >>> https://en.wikipedia.org/wiki/Sodium

Free fall under force of gravity of earth.

 

Find the greatest divisor

 Find the greatest divisor of 1001001001 such that its is less than 10000.

SINE THETA #Trigonometry

 Some important questions to practice.