SSC/SC1/ Gr10/ Chemical Reaction

SSC Board Science 1  

Grade 10 – Chemical Reactions and Equations  

Section A: Fill in the Blanks (5 × 1 = 5 marks)

1. The process in which new substances are formed by breaking and making chemical bonds is called _________________.  

   

2. In the reaction 2Mg + O₂ → 2MgO, magnesium is __________.  

 

3. The chemical formula for calcium hydroxide is __________.  

   

4. The substance that undergoes reduction in the reaction ZnO + C → Zn + CO is __________.  

   

5. The reaction in which two compounds exchange their ions to form two new compounds is called __________ reaction.  

  

Section B: Match the Column (5 × 1 = 5 marks)

Q2. Match the items in Column A with the appropriate items in Column B.

Column A | Column B                    

1. Decomposition reaction A. Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl 

 2. Displacement reaction B. CaCO₃ → CaO + CO₂        

 3. Double displacement reaction C. Zn + H₂SO₄ → ZnSO₄ + H₂  

 4. Redox reaction D. 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂ 

 5. Combination reaction E. CaO + H₂O → Ca(OH)₂       

Answer:  

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Section C: Name the Following (5 × 1 = 5 marks)

1. Name the reaction where one element replaces another in a compound.  

   ________________________________________________

2. Name the compound formed by the combination of calcium oxide and water.  

    _________________________________________________

3. Name the process to remove the oxygen from a compound.  

   _________________________________________________

4. Name the reaction represented by 2Na + 2H₂O → 2NaOH + H₂.  

    _________________________________________________

5. Name the phenomenon responsible for spoilage of food due to oxidation.  

    _________________________________________________

Section D: Balance the Chemical Equations (5 × 1 = 5 marks)

Balance the following equations:

1. _Al + O₂ → Al₂O₃_  

  ________________________________________________

2. _Mg + HCl → MgCl₂ + H₂_  

   _________________________________________________

3. _Ca(OH)₂ + H₂SO₄ → CaSO₄ + H₂O_  

   _________________________________________________

4. _Zn + NaOH → Na₂ZnO₂ + H₂_  

   _________________________________________________

5. _Fe + H₂O → Fe₃O₄ + H₂_  

   _________________________________________________

Section E: Subjective Questions

1. What is a chemical reaction? Explain with an example.  

 

2. . What is meant by oxidation and reduction? Give examples of each.  

    

3. State the difference between displacement and double displacement reactions.  

4. What is meant by precipitation reaction? Give an example.  

5. Write a short note on corrosion and its prevention.  

  

6. What do you understand by ‘rancidity’? How can it be prevented?  

7..State two differences between physical and chemical changes with examples.  

    

8. What is a redox reaction? Support your answer with examples.  

    

9. Explain with examples any two exothermic and two endothermic reactions.  

    

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

—-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Gr10/ICSE/ChemistryW.S/Organic Chemistry

Grade 10 ICSE Chemistry WorksheetTopic: Organic ChemistrySection 

1. .Explain what is meant by catenation.

2. What is a homologous series? 

3. Give examples.State any two characteristics of a homologous series.

4. Write the general formula of alkanes, alkenes, and alkynes.

5. Define structural isomerism with an example.

6. Write the IUPAC names for the following compounds:

(a) CH₃CH₂CH₃

(b) C₂H₄

(c) CH₃C≡CH

7. Give the structural formula for the following:

(a) But-1-ene

(b) Propyne

8. Give the molecular formula for a member of the alkane series containing 5 carbon atoms.

9. Write the names of the first two members of the alkyne series.

10. Write the balanced chemical equation for the complete combustion of methane.

11. What type of reaction is chlorination of methane? 

12. What happens when ethene reacts with bromine water?

13. Write an equation for the preparation of methane from sodium acetate.

14. How can unsaturated hydrocarbons be tested experimentally?

15. What is the difference between alkanes and alkenes?

16. Give two uses of methane.

17. What is meant by tetravalency of carbon

18. Draw the structural isomers of butane

19. .Identify which of the following pairs are isomers:

(a) C₄H₁₀ and C₃H₈

(b) C₂H₄ and C₂H₆

(c) CH₃CH₂CH₂CH₃ and CH₃CH(CH₃)CH₃

20. Write the difference between aliphatic and aromatic hydrocarbons with examples

Shares and Dividend/ Gr 10/2025

ICSE/MATHS/SHARES AND DIVIDENDS/MARKS 20

Q1. Solve the following questions

1. A man invests Rs 7,700 in a company paying a 5% dividend when a share of nominal value of Rs 100 sells at a premium of Rs 5.

a. find the number of shares

b. annual income

c. percentage income.                                                                                                                               (3)

2. A company declares 8% dividend to shareholders. if a man receives Rs 2840,

    as his dividend.

a. Find the nominal value of his shares.

b. Number of his shares                                                                                                                            (3)

3. A man buys 400 shares at Rs 40 per share at a premium of 20% and receives a return of 12 %.

a. Find the amount invested by him.

b. the rate of dividend paid by the company.                                                                                            (4)

Q2.  Solve the following questions

1. Which is the best investment 16% of Rs 100 shares at 60, 20% of 100 shares at Rs 120?                (3)

2. Ms. Rita invested Rs 131040 by buying Rs 100 shares at a discount of 9%. She sells shares worth Rs 72000 at a premium of 10% and the rest at a discount of 5 %.

a. Find the total number of shares.

b. Find number of shares sold at premium

c. Number of shares sold at a discount. 

d. Find the total gain or loss in the whole transaction.                                                                           (4)

3. Aishwarya bought 496 Rs. 100 shares at Rs. 132 each. Find:

a. investment made by her.

b. income of Aishwarya from these shares if the rate of dividend is 7.5%.

c. How much extra must Aishwarya invest in order to increase her income by Rs. 7,200?                    (3)

ICSE/Bio/QP/ Gr10/ Genetics and Cell Division/ MCQ

ICSE/Bio/ MCQ/ Gr10/ Genetic and Cell Division 

Question: Choose  the correct  alternative 

1. Name the parts labelled 1, 2 and 3.

A.1= Chromatids ,2= centromere, 

3= Spindle fibres.

B. 1= Centromere, 2= Spindle fibres 

3= Chromatids

C. 1=Spindle fibres 2=Chromatids 3= centromere

2. The chromatin material is formed of

A. DNA only 

B. DNA and Histones

C Histones only 

D.  Nucleotides

3. The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in

A. only testis 

B. only ovary

C. both ovary and testis 

D. all body cells

4. In which one of the following options the stages of mitosis have been given in correct sequence?

A. Prophase, metaphase, telophase, anaphase

B. Prophase, metaphase, anaphase, telophase

C. Anaphase, telophase, prophase, metaphase

D. Telophase, anaphase, prophase, metaphase

5. The functional unit of heredity is:

a) Chromosome

b) DNA

c) Gene

d) Allele

6. The separation of homologous chromosomes occurs in:

a) Mitosis

b) Meiosis I

c) Meiosis II

d) Cytokinesis

 7. What is produced at the end of meiosis?

a) Two diploid cells

b) Four haploid cells

c) Two haploid cells

d) Four diploid cells

8.In humans, which of the following represents a male genotype?

a) XX

b) XY

c) YY

d) XO

9.  Which part of the cell controls heredity?

a) Cytoplasm

b) Mitochondria

c) Nucleus

d) cell wall

10. What is the phenotypic ratio in a monohybrid cross?

a) 3:1

b) 1:2:1

c) 9:3:3:1

d) 1:1

11. Which phase of mitosis is characterized by the alignment of chromosomes at the equator?

a) Prophase

b) Metaphase

c) Anaphase

d) Telophase

12. Which of the following is a sex-linked disorder?

a) Sickle cell anaemia

b) Colour blindness

c) Thalassemia

d) Down syndrome

13. Assertion (A): Gregor Mendel is known as the Father of Genetics.

Reason (R): He proposed the laws of inheritance based on experiments with pea plants.

a) A and R are true, R explains A

b) A is true, R is false

c) A is false, R is true

d) Both A and R are false

14. Assertion (A): Cancer is often caused by uncontrolled mitosis.

Reason (R): Tumor cells divide rapidly and ignore normal checkpoints.

a) A and R are true, R explains A

b) A is true, R is false

c) A is false, R is true

d) Both A and R are false

15. Assertion (A): Mendel chose pea plant for his experiments.

Reason (R): Pea plants show only vegetative reproduction.

a) A and R are true, R explains A

b) A is true, R is false

c) A is false, R is true

d) Both A and R are false

16. Assertion (A): Dominant traits mask recessive traits.

Reason (R): Dominant alleles are expressed in both homozygous and heterozygous conditions.

a) A and R are true, R explains A

b) A is true, R is false

c) A is false, R is true

d) Both A and R are false

17.  Assertion (A): A hybrid tall plant is crossed with a dwarf. Half of the progeny is tall and half is dwarf.

Reason (R): Hybrid tall plant is heterozygous.

a) A is true, R is false

b) A is false, R is true

C) Both A and R are false

d) A and R are true, R explains A

18. Assertion (A): A carrier female of haemophilia is phenotypically normal.

Reason (R): Haemophilia is a sex-linked recessive disorder.

a) A is true, R is false

b)  A and R are true, R explains

c) A is false, R is true

d) Both A and R are false

19. Assertion (A): X-chromosome carries more genes than Y-chromosome.

Reason (R): Y-chromosome is shorter than X.

a) Both A and R are false

b) A is true, R is false

c) A is false, R is true

d) A and R are true, R explains A

20. Assertion (A): The genotype of a pure tall plant is TT.

Reason (R): Homozygous dominant traits are written in capital letters.

a) A is false, R is true

b) A is true, R is false

c) A and R are true, R explains A

d) Both A and R are false

21.The type of cell division that occurs in the apical meristem of plants is......

a) Meiosis

b) Prophase 

c) Anaphase 

d) Mitosis 

22. ........means the splitting of the nucleus.

a) Cytokinesis 

b) Nuclear fissure 

c) Karyokenisis 

d)  Meiosis 

23) ......is the point at which sister chromatids are held together.

a) Spindle 

b) Chromosome 

c) chromatids

d) centromere