CBSE Class 10 Chemistry Chemical Reactions And Equation Worksheet Set G

Read and download free pdf of CBSE Class 10 Chemistry Chemical Reactions And Equation Worksheet Set G. Download printable Science Class 10 Worksheets in pdf format, CBSE Class 10 Science Chapter 1 Chemical Reactions and Equations Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 10 Assignments and practice them daily to get better marks in tests and exams for Class 10. Free chapter wise worksheets with answers have been designed by Class 10 teachers as per latest examination pattern

Chapter 1 Chemical Reactions and Equations Science Worksheet for Class 10

Class 10 Science students should refer to the following printable worksheet in Pdf in Class 10. This test paper with questions and solutions for Class 10 Science will be very useful for tests and exams and help you to score better marks

Class 10 Science Chapter 1 Chemical Reactions and Equations Worksheet Pdf

Question. Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to:
a. Make the ribbon surface shinier
b. Remove the layer of magnesium oxide from the ribbon surface
c. Remove the layer of magnesium carbonate from the ribbon surface
d. Remove the moisture from the ribbon surface
Answer. C

Question. In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of:
a. Hydrochloric acid
b. Barium sulphate
c. Chlorine
d. Sulphur
Answer. B

Question. The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of:
a. Exothermic process
b. Endothermic process
c. Reversible process
d. Physical process
Answer. A

Question. A chemical reaction does not involve:
a. Formation of new substances having entirely different properties than that of the reactants
b. Breaking of old chemical bonds and formation of new chemical bonds
c. Rearrangement of the atoms of reactants to form new products
d. Changing of the atoms of on element into those of another element to form new products
Answer. D

Question. One of the following processes does not involve a chemical reaction. That is:
a. Melting of candle wax when heated
b. Burning of candle wax when heated
c. Digestion of food in our stomach
d. Ripening of banana
Answer. A

Question. It is necessary to balance a chemical equation in order to satisfy the law of:
a. Conservation of motion
b. Conservation of momentum
c. Conservation of energy
d. Conservation of mass
Answer. D

Question. All the methods mentioned below can be used to prevent the food from getting rancid except:
i. Storing the food in the air-tight containers
ii. Storing the food in refrigerator
iii. Keeping the food in clean and covered containers
iv. Always touching the food with clean hands
a. (i) and (ii)
b. (i) and (iii)
c. (i), (iii) and (iv)
d. (iii) and (iv)
Answer. D

Question. Rusting of iron involves a chemical reaction which is a combination of:
a. Reduction as well as combination reactions
b. Oxidation as well as combination reactions
c. Reduction as well as displacement reactions
d. Oxidation as well as displacement reactions
Answer. B

Question. You are given the following chemical reaction:
This reaction represents:
a. Combination reaction as well as double displacement reaction
b. Redox reaction as well as displacement reaction
c. Double displacement reaction as well as redox reaction
d. Decomposition reaction as well as displacement reaction
Answer. B

Question. When ferrous sulphate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:
a. Blue to green.
b. Green to blue.
c. Green to brown.
d. Green to yellow.
Answer. C

Question. Which of the following gases is used in the storage of fat and oil containing foods for a long time?
a. Carbondioxide gas
b. Nitrogen gas
c. Oxygen gas
d. Neon gas
Answer. B

Question.Following is given a diagram showing an experimental set-up:
The given set-up is used to carry out:
a. Distillation of water
b. Purification of water
c. Electrolysis of water
d. Hydrolysis
Answer. C

Question. The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is:
a. Copper granules
b. Magnesium ribbon
c. Sodium pellets
d. Aluminium dust
Answer. D

Question. The neutralization reaction between an acid and a base is a type of:
a. Double displacement reaction
b. Displacement reaction
c. Addition reaction
d. Decomposition reaction
Answer. A

Question. The chemical reaction between Hydrogen sulphide and iodine to give Hydrogen iodide and sulphur is given below:
The reducing and oxidizing agents involved in this redox reaction are:
a. Iodine and sulphur respectively
b. Iodine and hydrogen sulphide respectively
c. Sulphur and iodine respectively
d. Hydrogen sulphide and sulphur
Answer. B

CHEMICAL REACTIONS AND CHEMICAL EQUATIONS
 
Question. What does a Chemical reaction represent?
Answer. A chemical reaction represents the change of the species (atoms or molecules) taking part in the reaction into new species.
 
Question. What are reactants and products?
Answer. The chemical species that are taking part in the chemical reaction are called reactants. The chemical species that are formed as a result of a chemical reaction are called products.
 
Question. Why it is necessary to balance a Chemical equation?
Answer. In order to fulfill the Law of Conservation of mass.
 
Question. What is Combination Reaction?
Answer. The reaction in which a single product is formed from two or more reactants is known as Combination reaction.
Eg: CaO + H2O → Ca (OH )2
 
Question. What is Decomposition Reaction? 
Answer. The reaction in which a single substance splits into two or more simple substances under suitable conditions is known as Decomposition reaction. Decomposition reaction carried upon by heating.
Eg: CaCO3 → CaO + CO2
 
Decomposition carried by passing electric current.
Eg: H2O → H2 + O2
 
Decomposition reaction carried in the presence of sunlight.
Eg: 2AgCl → 2 Ag + Cl2
 
Question. With the help of an example explain Displacement Reaction.
Answer. The chemical reaction in which one element takes the position or the place of another element present in a compound is called Displacement reaction.
Eg: Fe + CuSO4 (aq) → Fe SO4 (aq) + Cu
Fe is more reactive than Cu . So it can displace Cu from its salt solution.
The blue colored copper sulphate solution changes to light green color.
 
Question. What is Double displacement reaction?
Answer. The chemical reaction in which one component each of both the reacting molecules get exchanged to form the products. Double displacements are also known as Precipitation reactions. They are generally ionic reactions
Eg: Ba Cl2 + Na2 SO4 → BaSO4 + NaCl
NaOH + HCl → NaCl + H2O
 
Question. What are Oxidation and Reduction Reactions?
Answer. Addition of oxygen to a substance or removal of hydrogen from a substance ina chemical reaction is known as oxidation reaction. Addition of hydrogen to a substance or removal of oxygen from a substance in a chemical reaction is known as Reduction reaction.
 
Question. What are Oxidising and Reducing agents?
Answer. The substance which brings about oxidation and which itself undergoes reduction is known as an oxidizing agent.The substance which brings about reduction and which itself undergoes oxidation is known as a reducing agent.
Eg: ZnO + C  → Zn + CO
ZnO is the oxidising agent. C is the reducing agent.
 
Question. What is Corrosion?
Answer. Corrosion is the chemical process involving the slow eating of the surfaces of certain metals when exposed to atmosphere for a long time
 
Question. What is Rusting? What is Rust?
Answer. Corrosion in Iron is called Rusting. Rust is hydrated Ferric oxide ( Fe2O3.xH2O) .It is brown in colour.
 
Question. Suggest few methods to prevent Corrosion or rusting of articles particularly iron.
Answer.  (a) Electroplating
(b) Painting
(c) Oiling and greasing
(d) Alloying
 
Question.Define the term Rancidity.
Answer. The slow oxidation of fats and oils present in the food materials resulting in some bad smelling compounds is known as Rancidity.
 
Question. Suggest few methods to prevent rancidity.
Answer. (a) Food materials should be packed in air tight containers.
(b) Refrigeration of food
(c) Place food materials and cooked food away from direct sunlight.
(d) Pack food stuff in atmosphere of nitrogen
(e) Addition of Anti-oxidants
 
Question. What are Exothermic and Endothermic Reactions?
Answer. Chemical reactions in which heat energy is released are called exothermic reactions. Chemical reactions in which heat energy is absorbed are called Endothermic reactions.

 

Chapter 06 Life Processes
CBSE Class 10 Biology Excretion Set A
CBSE Class 10 Biology Excretion Set B
CBSE Class 10 Biology Excretion Set C
CBSE Class 10 Biology Heterotrophic Nutrition Worksheet Set A
CBSE Class 10 Biology Heterotrophic Nutrition Worksheet Set B
CBSE Class 10 Biology Life Processes Nutrition In Animals Worksheet
CBSE Class 10 Biology Life Processes Nutrition In Plants Worksheet
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set A
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set B
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set C
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set D
CBSE Class 10 Biology Life Processes Reference Materials Worksheet
CBSE Class 10 Biology Life Processes Respiration In Animals Worksheet
CBSE Class 10 Biology Life Processes Respiration Worksheet Set A
CBSE Class 10 Biology Life Processes Respiration Worksheet Set B
CBSE Class 10 Biology Life Processes Respiration Worksheet Set C
CBSE Class 10 Biology Life Processes Respiration Worksheet Set D
CBSE Class 10 Biology Life Processes Transporation Worksheet Set A
CBSE Class 10 Biology Life Processes Transporation Worksheet Set B
CBSE Class 10 Biology Life Processes Transporation Worksheet Set C
CBSE Class 10 Biology Life Processes Transporation Worksheet Set D
CBSE Class 10 Biology Life Processes Worksheet
CBSE Class 10 Biology Life Processes Worksheet Set A
CBSE Class 10 Biology Life Processes Worksheet Set B
CBSE Class 10 Biology Life Processes Worksheet Set C
CBSE Class 10 Biology Life Processes Worksheet Set D
CBSE Class 10 Biology Life Processes Worksheet Set E
Chapter 09 Heredity and Evolution
CBSE Class 10 Biology Heredity And Evolution Set D
Chapter 13 Magnetic Effects of Electric Current
CBSE Class 10 Physics Magnetic Effects of Electric Current Worksheet Set E

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