Chemical Reactions And Equation Class 10th

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  • 1/10 Questions

    Oily contains food such as potato chips is flushed with nitrogen in packet to prevent 

    • Reduction 
    • Photolytic reaction 
    • Rancidity
    • None of these 
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About This Quiz

This educational assessment focuses on chemical reactions, tailored for students in class 10. It evaluates understanding of reaction types, color changes in reactions, gas evolution, and exothermic processes, enhancing student knowledge in practical chemistry applications.

Chemical Reactions And Equation Class 10th - Quiz

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  • 2. 

    What will be the colour of silver chloride powder is kept in the sunlight 

    • Green 

    • Grey

    • Yellow 

    • Black 

    Correct Answer
    A. Grey
    Explanation
    When silver chloride powder is exposed to sunlight, it undergoes a chemical reaction and turns grey. This is because silver chloride is photosensitive, meaning it reacts with light. The reaction causes the silver chloride to decompose and form silver metal and chlorine gas. The silver metal appears grey in color, hence giving the silver chloride powder a grey color when exposed to sunlight.

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  • 3. 
    Here two solutions barium chloride and sodium sulphate is mixed together, white insoluble substances obtained in this fig. Identify the type of reaction  - ProProfs

    Here two solutions barium chloride and sodium sulphate is mixed together, white insoluble substances obtained in this fig. Identify the type of reaction 

    • Displacement reaction 

    • Double displacement reaction 

    • Combination reactions 

    • Decomposition reaction 

    Correct Answer
    A. Double displacement reaction 
    Explanation
    In a double displacement reaction, the positive and negative ions of two compounds switch places to form two new compounds. In this case, when barium chloride (BaCl2) and sodium sulphate (Na2SO4) are mixed together, a double displacement reaction occurs. The positive ions (Ba2+ and Na+) switch places with the negative ions (Cl- and SO4 2-), resulting in the formation of barium sulphate (BaSO4) and sodium chloride (NaCl). The white insoluble substances obtained in the reaction indicate the formation of the insoluble compound barium sulphate.

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  • 4. 

    Reaction with copper sulphate solution with iron is example of

    • Displacement reaction 

    • Double displacement reaction 

    • Combination reactions 

    • Decomposition reaction 

    Correct Answer
    A. Displacement reaction 
    Explanation
    When iron reacts with copper sulphate solution, iron displaces copper from the copper sulphate solution to form iron sulphate and copper. This type of reaction, where one element displaces another element from a compound, is called a displacement reaction. Therefore, the given reaction is an example of a displacement reaction.

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  • 5. 

    Reaction with quick lime and water is an example of 

    • Endothermic 

    • Displacement 

    • Exothermic 

    • Photolytic

    Correct Answer
    A. Exothermic 
    Explanation
    When quick lime reacts with water, it undergoes a highly exothermic reaction. This means that heat is released during the reaction. The reaction between quick lime (calcium oxide) and water produces calcium hydroxide, and this process is known as slaking. The release of heat energy is a characteristic of exothermic reactions, where the products have lower energy than the reactants.

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  • 6. 
    Burning of magnesium ribbon is an example of - ProProfs

    Burning of magnesium ribbon is an example of

    • Oxidation 

    • Reduction 

    • Thermal decomposition reaction 

    • Displacement reaction 

    Correct Answer
    A. Oxidation 
    Explanation
    When magnesium ribbon burns, it reacts with oxygen in the air to form magnesium oxide. In this reaction, magnesium loses electrons and oxygen gains electrons. This transfer of electrons indicates a loss of electrons by magnesium, which is characteristic of oxidation. Therefore, burning of magnesium ribbon is an example of oxidation.

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  • 7. 

    What is the ratio of volume of hydrogen gas to the volume of oxygen gas during electrolysis of water

    • 1:2

    • 2:3

    • 2:1

    • 3:2

    Correct Answer
    A. 2:1
    Explanation
    During electrolysis of water, water molecules (H2O) are broken down into hydrogen gas (H2) and oxygen gas (O2). The ratio of the volume of hydrogen gas to the volume of oxygen gas produced is 2:1. This means that for every 2 volumes of hydrogen gas produced, 1 volume of oxygen gas is produced.

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  • 8. 

    Name the gas evolved when ferrous sulphate crystals is heated

    • Oxygen 

    • Nitrogen 

    • Nitrogen dioxide 

    • Sulphur  dioxide 

    Correct Answer
    A. Sulphur  dioxide 
    Explanation
    When ferrous sulphate crystals are heated, they undergo a chemical reaction that releases a gas. This gas is called sulphur dioxide.

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  • 9. 
    Name the gas evolved in this figure  - ProProfs

    Name the gas evolved in this figure 

    • Nitrogen dioxide 

    • Nitrogen oxide 

    • Nitrogen 

    • Ammonia 

    Correct Answer
    A. Nitrogen dioxide 
    Explanation
    Nitrogen dioxide is the correct answer because it is a reddish-brown gas that is formed when nitrogen monoxide reacts with oxygen in the air. The figure likely shows a reddish-brown gas being evolved, indicating the presence of nitrogen dioxide. Nitrogen oxide is a general term that can refer to various nitrogen-oxygen compounds, so it is not as specific as nitrogen dioxide. Nitrogen and ammonia are different compounds and would not be the correct answer in this context.

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  • 10. 

    Respiration is an example of 

    Correct Answer
    Exothermic, endothermic, evaporation, none of these
    Explanation
    Respiration is an example of exothermic because it is a process that releases energy in the form of heat. During respiration, organic molecules such as glucose are broken down in the presence of oxygen to produce carbon dioxide, water, and energy in the form of ATP. This energy release is accompanied by the generation of heat, making respiration an exothermic process.

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  • Feb 23, 2023
    Quiz Edited by
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  • Apr 30, 2020
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    Science Study
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