CBSE Class 9 | Science | Atoms and Molecules | Assertion Reasoning Questions (Solved) #eduvictors #class9Chemistry

CBSE Class 9 | Science | Atoms and Molecules | Assertion Reasoning Questions (Solved)

DIRECTION: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

(c) Assertion (A) is true but reason (R) is false.

(d) Assertion (A) is false but reason (R) is true.

Q1. 

Assertion: When 10 g of CaCO₃ is decomposed, 5.6 g of CaO is left and 4.4 g of CO₂ escapes.

Reason: The law of conservation of mass is followed.

Class 9 - Biology - Multiple Choice Questions (2022-23) #class9Biology #BiologyQuiz #cbsenotes #eduvictors

 Class 9 - Biology - Multiple Choice Questions (2022-23)

1. Who discovered cell?

a) Robert Hooke

b) Robert Brown

c) Anton Leeuwenhoek

d) Schleiden & Schwann

CBSE Class 9 Physics - Sound - Very Short Answer Based Questions (VSQA) #class9Physics #Sound #eduvictors

CBSE Class 9 Physics - Sound - Very Short Answer-Based Questions (VSQA)

Q1. Define vibration?

Answer: Rapid to and fro motion of an object.

Q2. How is sound produced?

Answer: Vibrating objects produce sound.

Q3. Define wave.

Answer: A wave is a disturbance produced in a medium as the particles of the medium vibrate.

CBSE Class 9 - Chemistry - Atoms and Molecules - Very Short Answer Based Questions - Answers #eduvictors #class9Science

CBSE Class 9 - Chemistry  - Atoms and Molecules - Very Short Answer Based Questions - Answers

Q1. What is the chemical symbol of lead and mercury?

Q2. Monika finds that all samples of pure water have Hydrogen and Oxygen in ratio of 1:8 by mass. Which law does the statement agree to?

Q3. 10g of silver nitrate solution is added to 10g of sodium chloride solution. What change in mass do you expect after the reaction and why?  

Class 9 - Physics - What is the difference between Gravitation Constant (G) and Gravitational acceleration (g) #eduvictors #class9Physics

Class 9 - Physics - What is the difference between Gravitation Constant (G) and Gravitational acceleration (g)

The gravitational constant (G) is a fundamental physical constant that appears in Newton's law of universal gravitation. It determines the strength of the gravitational force between two objects, and it is always the same, regardless of the distance between the objects or their masses. The value of G is approximately 6.674 x 10⁻¹¹ N(m/kg)².

Class 9 Science Half Yearly Question Paper (Set 1) 2022 - 23 #cbseClass9 #Class9Science #eduvictors

Class 9 Science Half Yearly Question Paper (Set 1) 2022 - 23

One of the most significant sources of knowledge is science. It performs a number of tasks for the benefit of our society, including developing new information, enhancing education, and raising the standard of living. Society's needs and the world's problems must be addressed by science.

Students need a thorough guide that will assist them in achieving their career goals if they are to flourish in all of their studies. One of the few steps in this trip is to solve the CBSE Solutions of the Sample Paper. Students can best prepare for Science by using the Science Sample Paper for Class 9. All of the questions that have a high likelihood of appearing on the test are highlighted in the Science Sample Paper for Class 9.

In order to help you review the entire syllabus and perform better on test day, you can also download the Class 9 NCERT Solutions.

CLASS IX-X: DELETED CHAPTERS IN MATHS AND SCIENCE IN SYLLABUS (2022-23) 

Please note the Board will conduct the annual scheme of assessment at the end of the Academic Session 2022-23

Class 9 Science

Deleted Chapters:

- DIVERSITY IN LIVING ORGANISMS

- NATURAL RESOURCES

- WHY DO WE FALL ILL?

Chapter: NATURAL RESOURCES will be taught in the class and  students are encouraged to prepare a brief write up on any concept of this chapter in their Portfolio (internal assessment)

Class 9 - Chemistry - Formulae of Simple Compounds - Atoms and Molecules #class9Chemistry #class9Science #eduvictors #cbseClass9

Class 9 - Chemistry - Formulae of Simple Compounds - Atoms and Molecules

Q1: What is a chemical formula?

Answer: The chemical formula of a compound is a symbolic representation of its composition.

Q2: Write the chemical formula for the following compounds. Also identify the ions formed.

➀ Hydrogen Chloride

➁ Hydrogen Sulphide

➂ Carbon Tetrachloride

➃ Magnesium Bromide

CBSE Class 9 - Physics - Work (Questions and Answers) #class9Science #WorkPowerEnergy #eduvictors

CBSE Class 9 - Physics - Work (Questions and Answers)

Q1: 2 Newton-metre is how many joules?

Answer: ∵ 1 Nm = 1J ∴ 2Nm = 2J

Q2: In the CGS system, what is the unit for Work?

Answer: erg

Class IX Science Term 1 MCQs (2021-22) (#cbseTerm1)(#class9Science)(#eduvictors)

Class IX Science Term 1 MCQs (2021-22)

Q1. Rusting of an article made up of iron is called

(a) corrosion and it is a physical as well as chemical change

(b) dissolution and it is a physical change

(c) corrosion and it is a chemical change

(d) dissolution and it is a chemical change

CBSE Class 9 Biology - Cell: The Fundamental Unit of Life (MCQs)(#class9Biology)(#cbse2021)(#eduvictors)

CBSE Class 9 Biology - Cell: The Fundamental Unit of Life (MCQs)

Image Credits: Animal Cell By OpenStax, wikimedia

Choose the correct option from the MCQs given:

Q1: Which structure in plant cell is responsible for providing the energy required to drive cellular processes?

(a) Chloroplast

(b) Mitochondrion

(c) Nucleus

(d) Golgi apparatus

CBSE Class 9 - Chemistry - Matter in Our Surroundings - 1 Mark Questions and Answers (#class9Chemistry)(#class9Science)(#eduvictors)

CBSE Class 9 - Chemistry - Matter in Our Surroundings - 1 Mark Questions and Answers 

Q1: What are the conditions for 'something' to be called 'matter'?

Answer: The main conditions for something to be matter are, it should:

(a) occupy space and

(b) have mass

Q2:  Name the state of matter in which particles just move around randomly because of the very weak force of attraction.

Answer: Gaseous state

Q3: Name two processes that provide the best evidence for the motion of particles in matter.

Answer: Diffusion and Brownian motion provide the best evidence about the random motion of particles in matter.

CBSE Class 9 - Chemistry - Chapter: Atoms and Molecules (Important Definitions) (#class9Chemistry)(#cbsenotes)(#eduvictors)(#class9Science)

Chapter: Atoms and Molecules (Important Definitions)

CBSE Class 9 - Chemistry

1. Law of Conservation of Mass: 

Mass can neither be created nor can it be destroyed in a chemical reaction. In a chemical reaction,

   Total mass of reactants = Total mass of products

2. Law of Constant Proportions: 

In a pure substance same elements are always present in a definite proportion by weight.

3. Atom: 

Smallest unit of an element, which may or may not exist independently, but always takes part in a chemical reaction.

Class 9 Science Annual Sample Question Paper (Set-1) 2020-21 (#class9Papers)(#eduvictors)(#cbsepapers)

Class 9 Science Annual Sample Question Paper  (Set-1) 2020-21

Learning is a continual process. To improve scores, the best way is to learn and practice. Solving question papers help students to evaluate their knowledge and familarise with different types of question patterns being asked in examination. 

Eduvictors provides CBSE Previous Year Papers and Sample Question Papers for Class 9 Maths, Science, Social, English, Hindi and Sanskrit with/without solutions to help students in their board exam preparation.

1. CBSE New Pattern 15 Sample Paper Science Class 9 for 2021 Exam with reduced Syllabus

2. Oswaal CBSE Sample Question Paper Class 9 Science Book (Reduced Syllabus for 2021 Exam) 

Here attached the Science Sample Question Paper (2020-2021).

Class 9 - Biology - Why Do We Fall ill? (Worksheet-2)(#class9Biology)(#eduvictors)(#cbse2020)

 Class 9 - Biology - Why Do We Fall ill? (Worksheet-2)

Fill in the blanks with suitable words.

1. ________ is a state of complete physical, mental and social well-being and not merely an absence of disease or infirmity.

2. A ________ is any physical or functional change from the normal state that causes discomfort, disability or impairs the health of a person.

3. Diseases may be classified as infectious and non-infectious depending upon their causes, or as _______ and _______ depending upon their duration.

Class 9 - Chemistry - Atoms and Molecules - Atomicity of Elements (Worksheet)#class9Chemistry #eduvictors #cbse2020

Class 9 - Chemistry - Atoms and Molecules - Atomicity of Elements (Worksheet)

Molecules of an element are formed by the atoms of the same type. Molecules of some elements contain only one atom and molecules of some elements contain two or more atoms. The number of atoms constituting a molecule is known as its atomicity.

Gravitation 1 - Mark Questions (Solved) CBSE Class 9 - Physics (#class9Physics)(#Gravitation)(#eduvictors)

Gravitation 1 - Mark Questions (Solved) CBSE Class 9 - Physics

Q1: Who formulated the universal law of Gravitation?

Answer: Isaac Newton

Q2: What is free fall?

Answer: When an object falls from any height under the influence of gravitational force only, it is known as a free fall.

Q3: What is the value of gravitational constant G on the earth? Does the value G change on the moon?

Answer: The value of the gravitational constant on the earth is 6.67×10⁻¹¹ Nm²/kg². The value of G does not change (universal constant), it remains the same on the moon.

Q4: What will happen to the gravitation force between two bodies, if the mass of one body is doubled?

Answer: Gravitational force will double also.

CBSE Class 9 - Biology - Animal Tissues (MCQs)(#class9Biology)(#eduvictors)(#animaltissues)

Animal Tissues (MCQs)

CBSE Class 9 - Biology

Read the question carefully and choose the correct option from the choices given.

Q1: The tissue responsible for movement in our body is

      (A) connective tissue 

      (B) nervous tissue 

      (C) muscular tissue 

      (D) epithelial tissue

Q2: Neuron receives and transmits information and messages in the form of

      (A) nerve beats 

      (B) muscular impulses

      (C) nerve impulses 

      (D) nerve processes

CBSE Class 9 - Biology - Plant Tissues (MCQs) (#eduvictors)(#class9biology)(#plantTissues)

CBSE Class 9 - Biology - Plant Tissues (MCQs)

Multiple Choice Questions (MCQs)

Q1: Which of the following has the ability to divide ?

 (a) Xylem

 (b) Phloem

 (c) Meristematic Tissues

 (d) Permanent Tissues

Q2: The growth is plants is

(a) limited to certain regions

(b) uniform in all parts

(c) limited to top region

(d) limited to roots only.

CBSE Class 9 - Biology - Cell - Fundamental Unit Of Life - 1 Marker Questions (#class9Biology)(#eduvictors)

CBSE Class 9 - Biology - Cell - Fundamental Unit Of Life - 1 Marker Questions

Animal Cell (Image Credits: AJC1, Flickr)

Q1. Name the cell organelle which is commonly called ‘suicidal bag’ of the cell.

Q2. Which cell organelle are termed the ‘powerhouses’ or ‘storage batteries’ of the cell?

Q3. Name cell organelles having double-membrane envelope.

Q4. Name the organelle which is associated with protein synthesis.

Q5. Which organelle of plant cell has chlorophyll pigments in it?

Q6. Who proposed the fluid mosaic model of the structure of the plasma membrane?

Q7. Who coined the term ‘cell’ and in which year?

Q8. Name the scientists who proposed ‘cell theory’.