Fill in the blanks

1.     Temporary change in a substance is a ______ type of change.

2.     Permanent change in a substance is a _______ type of change.

3.     When _____ change occurs a chemical reaction takes place.

4.     Reactants are always represented on the _______ side of the chemical equation.

5.     Products are always represented on the _______ side of the chemical equation.

6.     When two or more substances combine to form a single product, then the reaction is known as ________ reaction.

7.     The pale yellow silver bromide turns grey when exposed to _______

8.     When more reactive element removes the another element, having less reactivity, from its compound, then the reaction is ________

9.     When oxidation and reduction takes place simultaneously, it is a _________ reaction.

10. Rancidity is due to ________ of oil.

11. When iron is exposed to moist air, it undergoes _______ reaction.

12. The reddish brown deposit formed on iron nails kept in a solution of copper sulphate is _____

13. Barium chloride when reacts with ammonium sulphate form barium sulphate and ammonium chloride. This is ______________ type of chemical reaction.

14. Reaction of iron nails with copper sulphate solution is an example of ___________ reaction.

15. The substances that undergo change during chemical reaction are called ________

16. _________ are used to prevent oxidation of food containing fats and oils.

ANSWERS

1)    Physical

2)    Chemical

3)    Chemical

4)    Left

5)    Right

6)    Chemical Combination

7)    Sunlight

8)    Chemical Displacement

9)    Redox

10)            Oxidation

11)            Oxidation

12)            Copper metal

13)            Chemical double displacement/decomposition

14)            Chemical Displacement

15)            Reactants

16)            Antioxidants

 

Maths Syllabus 2024-25

Old Syllabus

Part 1

1)    Arithmetic Progression

2)   Triangles

3)   Pair of Linear Equation in Two Variables

4)   Circles

5)   Areas Related to Circles

6)   constructions

7)   Coordinate Geometry

8)   Real Numbers

 Part 2

9)   Polynomials

10) Quadratic Equations

11)  Introduction to Trigonometry

12) Applications of Trigonometry

13) Statistics

14) Probability

15) Surface Areas and Volumes

 New Books

Part 1

1)    Real Numbers

2)   Polynomials

3)   Pair of Linear Equation in Two Variables

4)   Quadratic Equations

5)   Arithmetic Progression

6)   Triangles

7)   Coordinate Geometry

 Part 2

8)   Introduction to Trigonometry

9)   Applications of Trigonometry

10) Circles

11)  Areas Related to Circles

12) Surface Areas and Volumes

13) Statistics

14) Probability

Chapter wise Changes in New Syllabus

(Comparison of Old and New Syllabus)

 Part1

1)  Real Numbers

4 exercises (Old Book)

·         Euclid’s Division Lemma

·         Fundamental Theorem of Arithmetic

·         Relationship Between the numbers and their HCF and LCM

·         Irrational Numbers

·         Decimal Expansions of Rational Numbers

 2 exercises (New Book)

·         Fundamental Theorem of Arithmetic

·         Relationship Between the numbers and their HCF and LCM

·         Irrational Numbers

 

 2)  Polynomials

3 exercises (Old Book)

·         Geometric Meaning of Polynomials

·         Relationship between zeroes and coefficients of polynomials

·         Division Algorithm

 2 exercises (New Book)

·         Geometric Meaning of Polynomials

·         Relationship between zeroes and coefficients of polynomials

  

3)  Pair of Linear Equations in Two Variables

6 exercises (Old Book)

·         Methods to find solution

Ø  Graphical

Ø  Substitution

Ø  Elimination

Ø  Cross multiplication

·         Lines Represented by 2 linear Equations (intersecting, coincident, parallel)

·         Equations reducible to linear equation in 2 variables

 3 exercises (New Book)

·         Methods to find solution

Ø  Graphical

Ø  Substitution

Ø  Elimination

·         Lines Represented by 2 linear Equations (intersecting, coincident, parallel)

 

4)  Quadratic Equations

4 exercises (Old Book)

·         Quadratic Equations – Standard Form

·         Solve QE by

Ø  Factorization method

Ø  Completing the square method

Ø  Formula Method

·         Nature of Roots of QE

 3 exercises (New Book)

·         Quadratic Equations – Standard Form

·         Solve QE by

Ø  Factorization method

·         Nature of Roots of QE

  

5)  Arithmetic Progression

3 exercises (Old Book)

·         Meaning of AP

·         Find n^th term of AP

·         Sum of n terms of AP

 New Book

No Change

  

6)  Triangles

5 exercises (Old Book)

·         Similar Figures

·         Similar Triangles

·         Basic Proportionality Theorem (BPT)

·         Criteria for Similarity

Ø  AAA

Ø  SSS

Ø  SAS

·         Areas of Similar Triangles

·         Pythagoras Theorem

3 exercises (New Book)

·         Similar Figures

·         Similar Triangles

·         Basic Proportionality Theorem (BPT)

·         Criteria for Similarity

Ø  AAA

Ø  SSS

Ø  SAS

  

7)  Co-ordinate Geometry

3 exercises (Old Book)

·         Distance Formula

·         Section Formula

·         Midpoint formula

·         Area of Triangle

 2 exercises (New Book)

·         Distance Formula

·         Section Formula

·         Midpoint formula

 

 Part 2

 

8)  Introduction To Trigonometry

4 exercises (Old Book)

·         Basic Definitions of Trigonometric Ratios

·         Trigonometric Ratios of Specific Angles

·         Trigonometric Ratios of Complimentary Angles

·         Trigonometric Identities

 3 exercises (New Book)

·         Basic Definitions of Trigonometric Ratios

·         Trigonometric Ratios of Specific Angles

·         Trigonometric Identities

  

9)  Some Applications of Trigonometry

1 exercise (Old Book)

·         16 problems

 1 exercise (New Book)

·         15 problems

 

10)     Circles

2 exercises (Old Book)

·         Tangents to the circle

·         2 theorems

 New Book

No Change

  

11)     Areas Related to circles

3 exercises (Old Book)

·         Area and Circumference of circle

·         Area of Sector and Segment

·         Area of Combination Figures

1 exercise (New Book)

·         Area of Sector and Segment

  

12)     Surface Areas and Volumes

4 exercises (Old Book)

·         Surface Areas of Combination Solids

·         Volume of Combination Solids

·         Conversion of Solid from 1 shape to another

·         Frustum of Cone

 2 exercises (New Book)

·         Surface Areas of Combination Solids

·         Volume of Combination Solids

  

13)     Statistics

4 exercises (Old Book)

·         Mean

Ø  Direct Method

Ø  Indirect Method (Assumed Mean and Step Deviation Method)

·         Median

·         Mode

·         Graphical representation of Cumulative Frequency (Ogive Curve)

  3 exercises (New Book)

·         Mean

Ø  Direct Method

Ø  Indirect Method (Assumed Mean and Step Deviation Method)

·         Median

·         Mode

  

14)     Probability

1 exercise (Old Book)

 New Book

No Change