ICSE/Chemistry/ Gr 9/ Atomic structure and Chemical bonding.

Subject: Chemistry 

Topic Atomic structure and Chemical bonding

Marks: 20 marks

Question 1

Q1. Define                                                           (2)

a. Atomic number

b. Electro valent bond

Q2. The atomic number of an element is 11 and mass number is 23.                                   (3)

a. write the elements in symbolic form 

b. Calculate the number of protons, and neutrons.

c. If the element combine with oxygen. State the type of bonding in it.

Q3.  Write down the electronic configuration of

a. Magnesium 

b.Neon.                                                                (2)

Q4. Aluminium combine with Chlorine.

a. Write the symbol of Aluminium and Chlorine.

b. State their atomic number.

c. What is their electronic configuration.

d. What type of bonding will exists between them?

e. Explain the bonding between them with the help of atomic structure. Draw the atomic structure as well.                                             (13)

ICSE/ Physics/ Gr 9/ Measurements and Experimentation

Subject: Physics

Topic: Measurements and Experimentation

Marks: 40 

Question 1. 

Fill in the blanks.                                               (5)                                            

1. The SI unit of energy is..............

2. .............. Is the process of comparison of given physical quantity with the known standard quantity of the same nature.

3. The least count of screw gauge is ..........

4. The time period of oscillation is directly proportional to the .................. Of its effective length.

5.  The time period of oscillation does not depend on the .................. on either side

Question 2.

Name the following.                                          (5)

1. Two fundamental unit.

2. Two units bigger than metre

3. Two errors of vernier caliper.

4. One complete to and fro motion of simple pendulum.

5.  The maximum displacement of Bob from mean position on either side.

Question 3.                                                       (10)

Answer in one or two sentences

1. A unit in its short form is never written in plural.

2.  Explain with suitable calculation that power is a derive unit.

3. State the function of inside jaw of vernier caliper.

4. Write the use of Ratchet of screw gauge.

5. Explain with the help of graph how square of time period is directly proportional to the length. 

ICSE/ Grade 9/ Physics/ Measurements And Experimentation.

Subject: Physics 

Grade :9 

Topic Measurements and Experimentation

Marks :40

Question 1

Fill in the blanks.                                              (10)

1. The SI unit pressure is ..................

2. The distance of stars from Earth is generally measured in ................

3. The ................. Of an instrument is the smallest measurements that can be taken accurately.

4. The time period of a Seconds pendulum clock is ..........

5. The unit of time period is ............

6. One light year is .............m

7. Density is Mass is to ...............

8. A ....................... Is a heavy point mass suspended from rigid support.

9. The maximum displacement of the Bob from mean position is ..............

10. A fundamental unit for measuring mass is ............

Question 2.

1. What is unit?                                                  (1)

2. State and explain giving example the types  of unit dependent on the other unit for measurement.                                                    (3)

3. How to choose a unit?                                  (3)

4. Name the three system of units and write the full form.                                                       (3)

Question 3.

1. The wavelength of light is 600 nm. What is its wavelength in A°?                                        (1)

2. State and write the principle of 

a. Vernier caliper

b. Screw gauge.                                                  (2)

3. What are the parts of vernier caliper and write their functions?                                        (4)

4. Screw gauge has error. 

a. Name the errors.

b. Explain each error.                                         (3)

Question 4.

1. State the factors that affects the time period  of simple pendulum.                             (3)

2. A simple pendulum completes 80 oscillation in 2 minutes. Find its frequency  and time period.                                                                 (2)

3.  Derive the expression for the time period of simple pendulum.                                              (3)

4. Find the length of a seconds pendulum at a place where g= 10m/s2.                                   (2)

SSC/ Grade10/ Science 1/ worksheet/ Gravitation

SSC/ Grade10/ Science 1/ worksheet/ Gravitation

1. What are the effects of force acting on an object?

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2. What are the type of forces you are familiar with?

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3. What do you mean by gravitational force?

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4. What are Newton's law of motion?

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5. Distinguish between centripetal and centrifugal force.

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6. State kepler's first law of motion with the help of diagram.

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7. State and  explain kepler's second law.

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8. Write a kepler's third law and derive it.

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9. Newton gave universal law of gravitation.

1. State Newton's law of gravitation.

2. Write the mathematical equation for the gravitation.

3. What is the value of G?

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   10. How did Newton derive inverse square  law of gravitation with the help of kepler's third law.

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     11. Mahendra and Virat are  sitting at a distance of 1 m from each other. Their  masses are 75 kg and 80 kg respectively.  What is the gravitational force between them?

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12. What is escape velocity?

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13. Write three equations of motion.

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14.  The value of acceleration due to gravity is more at the pole then the Equator. Give reason

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15. When we drop feather and a stone at the same time from a height, the stone reach Faster than feather. Give reason.

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16.  Rahul's   mass on the earth is 45 kg,  

1. What will be his mass on moon ? Why?

2. Calculate his weight on Earth.

3. Calculate his weight on moon, knowing that acceleration due to gravity on moon is ⅙ th of that on earth.

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18. Deduce  the formula for acceleration due to gravity on earth.

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bio

Q1. What is the cell ? what are the characteristics of cell?                                3

Q2. Who gave the cell theory? Write the salient features of cell theory.                                4

Q3. Name the following.                             

a. smallest cell

b. Longest cell 

c. Largest cell.                                             3

Q4. State two advantages of the cell being small.                                                            2

Q5. Distinguish between plant cells and animal cell.                                                               6

Q6. Write the function of

a.  plasma membrane based on chemical present on it.

b.  Cell wall

c. Endoplasmic reticulum

d. Vacuoles. 

e. Cell membrane

d. Ribosomes

                      

Q7. Distinguish between plant and animal cell. (2)      

Q8.  Distinguish between  Meristamatic tissues (2)

Q9. Distinguish between xylem and phloem.(3)

Q10. Distinguish between sclenrechyma and collenchyma(3)

Grade 9/ Chemistry/ICSE/ Topic: Atomic structure and Chemical bonding.

Grade 9

Subject: Chemistry

Topic: Atomic structure and Chemical bonding

Marks:40

Question 1

Fill in the blanks.                                                (5)

1. The bonding present in Magnesium chloride is ...................

2. Atomic number of phosphorus is ..........

3. The atomic number is sulphur is 16, and the electronic configuration is ...............

4. Nitrogen has ............ Lone pair of electrons.

5. The electronic configuration of oxygen is 2,4. The number of valence electron is ...............

Question 2.

An element X and Y has atomic numbers12 and 17.

a. State the name of the elements. 

b. Write the symbol of the elements.

c. What is their electronic configuration?

d. How many valence electrons are their?

e.  Explain the type of bonding between the two with the help of atomic structure.                 (10)

Question 3.

a. Name the following.

1. A non metal having atomic number 9.

2. Type of bonding in carbon tetra chloride.

3. Type of bonding in methane.

4. A metal with electronic configuration 2,8,3

5. Type of the element whose electronic configuration is 2,8.                                         (5)

b. Draw the atomic structure of 

1. Lithium

2. Silicon

3. Argon

4. Potassium

5. Beryllium.                                                        (5)

Question 3

a. Distinguish between modern and Daltons atomic theory. ( write 3 points each)              (3)

b. William Crooke and eminent scientist had performed and experiment.

1. What did he discovered?

2. How did he discovered it?                           (3)

c.  Define giving examples for each

1. Atom

2. Atomic number

3. Atomic mass number

4. Isotopes                                                          (4)

Question 4.

Ernest Rutherford had performed Scattering experiment.

a. Draw the scattering experiment.                 (2)

b. Write his observation and conclusion.       (3)