Chemical Change worksheet with answers for Grade 6 Standard
Chemical Change worksheet with answers for Grade 6 Standard. This Worksheet includes MCQ, Fill in the blanks, True / False, Short Answer Questions, Long Answer Type Questions.
Multiple Choice Questions (15*1)
1.) Which is a feature of chemical change?
a) Production of a new substance
b) Change of chemical composition
c) Irreversible transformation
d) Change in molecular structure
Answer: a. Production of a new substance
2.) Ripening of fruits is an example of what change?
a) Chemical change
b) Physical change
c) Biological change
d) Atomic change
Answer: a) Chemical change
3.) When a Chemical change happens, which property of matter remains the same?
a) Mass
b) Volume
c) Density
d) Color
Answer: a) Mass
4.) Which of the following is NOT a chemical change?
a) Burning wood
b) Melting ice
c) Rusting of iron
d) Digestion of food
Answer: b) Melting ice
5.) When iron reacts with oxygen, what is the product formed?
a) Carbon dioxide
b) Water
c) Iron oxide
d) Hydrogen gas
Answer: c) Iron oxide
6.) Which of the following is an example of a chemical change?
a) Cutting paper
b) Mixing salt and water
c) Boiling water
d) Baking a cake
Answer: d) Baking a cake
7.) What happens to the mass during a chemical change?
a) It increases
b) It decreases
c) It remains the same
d) It varies
Answer: c) It remains the same
8.) When a substance changes color during a chemical reaction, it is a sign of:
a) Physical change
b) Chemical change
c) Temperature change
d) None of the above
Answer: b) Chemical change
9.) When milk turns sour, it is an example of a:
a) Physical change
b) Chemical change
c) Biological change
d) Thermal change
Answer: b) Chemical change
10.) What happens to the particles in a substance during a chemical change?
a) They become smaller
b) They become larger
c) They rearrange to form new substances
d) They remain the same
Answer: c) They rearrange to form new substances
11.) When milk is heated and turns into curd, what type of change is it?
a) Physical change
b) Chemical change
c) Biological change
d) State change
Answer: b) Chemical change
12.) What is a substance that speeds up a chemical reaction without being consumed in the process called?
a) Reactant
b) Product
c) Catalyst
d) Solvent
Answer: c) Catalyst
13.) Which of the following is NOT a common indicator of a chemical change?
a) Change in color
b) Formation of gas bubbles
c) Change in temperature
d) Change in shape
Answer: d) Change in shape
14.) When iron rusts, which of the following processes is occurring?
a) Oxidation
b) Reduction
c) Evaporation
d) Sublimation
Answer: a) Oxidation
15.) How can you make hard water soft?
a) By boiling it
b) By freezing it
c) By adding more minerals
d) By shaking it
Answer: a) By boiling it
Write True/False (10*1=10)
1.) Chemical changes results change in substance’s composition.
Answer: True
2.) Melting of snow is an example of a chemical change.
Answer: False
3.) Rusting of iron is a chemical change.
Answer: True
4.) Freezing of water to form ice is a chemical change.
Answer: False
5.) Hard water lathers easily with soap.
Answer: False
6.) Soft water contains a low concentration of minerals.
Answer: True
7.) Boiling is an effective method to remove temporary hardness from water.
Answer: True.
8.) Rainwater is naturally soft.
Answer: True.
9.) Photosynthesis is an example of a chemical change in living things.
Answer: True
10.) Hard water is generally better for household appliances and pipes.
Answer: False
Fill in the blanks with right answers(5*1=5)
1.) Hard water contains a high concentration of minerals, primarily ___ and _____.
Answer: calcium, magnesium
2.) Soft water contains fewer minerals, making it easier for soap to _____.
Answer: lather
3.) The process of removing hardness from water is called _____.
Answer: water softening
4.) Plants use a process called _____ to convert carbon dioxide and sunlight into energy and oxygen.
Answer: photosynthesis
5.) During respiration, living things produce _____ as a waste product, which they exhale.
Answer: carbon dioxide
Short answer question (10*1=10)
1.) What is chemical change in living things
Answer: A chemical change in living things involves reactions that alter the chemical composition of substances, such as digestion or photosynthesis.
2.) Give one example of chemical change in human body.
Answer: Digestion is an example of a chemical change in our body, where food is broken down into nutrients through chemical reactions
3.) What is a autotrophs?
Answer: Autotrophs are the loving organisms that can produce their own food and doesn’t rely on other organisms .
4.) Name three solids that dissolve in water.
Answer: Three solids that can dissolve in water are sugar, coffee, baking powder etc.
5.) What is soft water?
Answer: The water which forms lather easily with soap is called soft water.
6.) Define distillation.
Answer: Distillation is the process of conversion of liquid into vapor and then condensing the vapor back into liquid by cooling it.
7.) How can we remove hardness of water?
Answer: Hard water can be softened by using a water softener or adding certain chemicals like lime, adding washing soda or by boiling.
8.) Name two minerals present in hard water.
Answer: Hard water contains minerals like calcium and magnesium.
9.) Write one advantage of hard water.
Answer: Hard water contains high amount of minerals like calcium, which helps strengthening teeth and bones.
10.) What is the main difference between hard water and soft water?
Answer: The main difference is that hard water contains more minerals and soft water has lesser mineral contents.
Also See: Class 6 Science Worksheet