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Popular Questions
- To indicate the presence of gaseous reactant or product, we use the symbol
- Assertion : Quicklime reacts vigorously with water releasing a large amount of heat Reason The above chemical reaction is an exoth..
- A reddish brown coloured metal used in electric wires, when powdered and heated strongly in an open China dish, its colour turns b..
- When Ca(NO3)2 is heated, it gives CaO, NO2(g) and O2(g) .
- Which of the following reaction is characterised by the yellow colour of product
- A powder salt (x) in a dry test tube was heated that evolves brown fumes of nitrogen dioxide
- Which of the following is a physical change?
- Which among the following statements is/are true?
- Assertion : The following chemical equation is an example of thermal decomposition reaction Reason : Heat gets released in the dec..
- Identify the type of chemical reaction taking place in each of the following
- Electrolysis of water is a decomposition reaction.
- Assertion : In the following chemical equation, CuO(s) + Zn (s) -> ZnO(s) + Cu(s) Reason : The process in which oxygen is added to..
- What is the difference between skeletal equation and balanced chemical equation? Give example
- Complete the missing components/variables given as reactant and product in the following reactions
- Solid Calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat.
- State reason for the following.
- Which of the following are exothermic processes?
- Complete the missing component/ variable given as X and Y in the following reaction.
- A metal salt MX when exposed to light, split up to form metal M and a gas X2.
- A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution.
- Assertion : Fe2O3 + 2AL -> Al2O3 + 2Fe Reason : Aluminium being more reactive than iron, displaces Fe from its oxide
- Which kind of chemical reaction takes place when electric current is passed through fused lead bromide?
- Identify the oxidising agent in the following :
- Study the reactions given below: Which of the following chemical reactions will occur.
- Which among the following statement(s) is/are true? Exposure of silver chloride to sunlight for a long duration turns grey due to
- Identify the reducing agent in the following reaction.
- What is redox reaction? identify the substance oxidised and the substance reduced in the following reactions
- What is a reduction reaction? Identify the substances that are oxidised and the substances that are reduced in the following react..
- Why do we apply paint on iron articles?
- Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
- What is a balanced chemical equation?
- Fe2O3 + 2AL -> AL2O3 + 2Fe
- What do you mean by a precipitation reaction?
- Write one equation each for decomposition reactions
- A housewife wanted her house to be white washed. She bought 10kg of quicklime from the market and dissolved in 30 L of water.
- Which of the statements about the reaction below are incorrect?
- Explain the following terms with one example of each
- Translate the following statements into chemical equations
- In the refining of silver, the recovery of silver from nitrate solution
- Why is the amount of gas collected in one of the test tubes in
