CBSE X Science Chemical Reactions

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#1. What is the chemical name for slaked lime?

Carbon monoxide

Calcium carbonate

Calcium hydroxide

Calcium oxide

#2. Which of the following reaction is also be termed as thermal decomposition reaction?

Double displacement reaction

Displacement reaction

Combination reaction

Decomposition reaction

#3. Which of the reaction is used in black and white photography?

Displacement reaction

Decomposition reaction

Combination reaction

Oxidation reaction

#4. What happens when sodium sulphate solution is mixed with the solution of barium chloride?

No reaction takes place

Barium sulphate is formed

Sulphur dioxide gas is formed

Sodium sulphate is formed

#5. Which of the following gives energy while respiration?

Burning of natural gas

Burning of coal

Burning of glucose

Burning of oxygen

#6. Which metal is displaced when lead is put in the solution of copper chloride?

All of the above

Lead

Copper

Chlorine

#7. In which of the following heat is evolved?

Displacement reaction

Double displacement reaction

Decomposition reaction

Combination reaction

#8. What is the name of reaction in which both oxidation and reduction takes place?

Combination reaction

Thermal decomposition

Redox reaction

Displacement reaction

#9. What happens when carbon dioxide is passed in lime water?

Lime water turns red because of formation permanganate

Lime water turns red because of formation of copper sulphate

Lime water turns milky because of formation of water

Lime water turns milky because of formation of calcium carbonate

#10. Which of the following is termed as exothermic reaction?

Reaction in which heat is evolved

Reaction in which there is loss of oxygen

Reaction in which heat is absorbed

Reaction in which there is gain of hydrogen

#11. Which of the following is formed when lead nitrate is put under thermal decomposition?

All of the above

Nitrogen dioxide

Lead oxide

Oxygen gas

#12. Which of the following does show oxidation reaction?

None of the above

Loss of oxygen

Gain of oxygen

Gain of hydrogen

#13. Which of the following product is formed after heating of limestone?

Calcium carbonate

Calcium oxide

Hydrogen gas

All of the above

#14. Which of the following termed as reducing agent?

Which removes hydrogen

All of the above

Which removes oxygen

Which gives oxygen

#15. What happens when Copper metal is dipped in the solution of zinc sulphate?

Copper sulphate is formed

Oxygen gas is formed

Zinc metal is separated

No reaction takes place

#16. On the basis of evolution or absorption of heat, chemical reactions can be divided in how many types?

Four

Two

Three

One

#17. Which of the following is formed when lead nitrate is put under thermal decomposition?

All of the above

Nitrogen dioxide

Oxygen gas

Lead oxide

#18. What happens when silver bromide is exposed to sunlight?

Hydrogen gas is formed

Iodine gas is formed

Chlorine gas is formed

Bromine gas is formed

#19. What is the name of reaction, which decomposes after supply of heat?

Displacement reaction

Combination reaction

Redox reaction

Thermal decomposition

#20. Which of the following is termed as oxidizing agent?

Which gives hydrogen

Which removes oxygen

All of the above

Which gives oxygen

#21. Which of the following does denote chemical reaction take place?

Change of state

Evolution of heat

Reversible reaction

Formation of new product

#22. Why are articles made of iron painted to prevent rust?

Paint prevents iron articles to getting sticky

Paint makes articles made of iron beautiful

Paint prevents iron articles to come in contact with moisture present in air

All of the above

#23. What is the name of substance which does get deposited over iron because of moisture present in air?

Carbonate

Rust

Oxygen

Sulphide

#24. Which of the following is termed as rancidity?

All of the above

Oxidation of sugar present in food

Reduction of oxygen present in food

Oxidation of oil present in food

#25. Heating of ferrous sulphate gives which of the following product?

Sulphur dioxide

Ferric oxide

All of the above

Sulphur trioxide

Finish

Results

#1. What is the chemical name for slaked lime?

#2. Which of the following reaction is also be termed as thermal decomposition reaction?

#3. Which of the reaction is used in black and white photography?

#4. What happens when sodium sulphate solution is mixed with the solution of barium chloride?

#5. Which of the following gives energy while respiration?

#6. Which metal is displaced when lead is put in the solution of copper chloride?

#7. In which of the following heat is evolved?

#8. What is the name of reaction in which both oxidation and reduction takes place?

#9. What happens when carbon dioxide is passed in lime water?

#10. Which of the following is termed as exothermic reaction?

#11. Which of the following is formed when lead nitrate is put under thermal decomposition?

#12. Which of the following does show oxidation reaction?

#13. Which of the following product is formed after heating of limestone?

#14. Which of the following termed as reducing agent?

#15. What happens when Copper metal is dipped in the solution of zinc sulphate?

#16. On the basis of evolution or absorption of heat, chemical reactions can be divided in how many types?

#17. Which of the following is formed when lead nitrate is put under thermal decomposition?

#18. What happens when silver bromide is exposed to sunlight?

#19. What is the name of reaction, which decomposes after supply of heat?

#20. Which of the following is termed as oxidizing agent?

#21. Which of the following does denote chemical reaction take place?

#22. Why are articles made of iron painted to prevent rust?

#23. What is the name of substance which does get deposited over iron because of moisture present in air?

#24. Which of the following is termed as rancidity?

#25. Heating of ferrous sulphate gives which of the following product?

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