English Medium कक्षा १० - CBSE Question Bank Solutions

State the rule to determine the direction of a current induced in a coil due to its rotation in a magnetic field.

What is the other name of Maxwell's right-hand thumb rule?

State and explain Maxwell's right-hand thumb rule.

Name the rule which gives the direction of induced current.

State and explain Fleming's right hand rule.

Name and state the rule to find the direction of current induced in a coil due to its rotation in a magnetic field.

State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.

Why does the colour of copper sulphate solution change when an iron nail is kept immersed in it?

What type of chemical reaction is represented by the following equation?

\[\ce{A + BC -> AC + B}\]

What type of chemical reaction is represented by the following equation?

\[\ce{A2O3 + 2B -> B2O3 + 2A}\]

Which of the following is a combination and which is a displacement reaction?

1. \[\ce{Cl2 + 2KI -> 2KCl + I2}\]
2. \[\ce{2K + Cl2 -> 2KCl}\]

What type of reaction is represented by the following equation?

\[\ce{2Na + 2H2O -> 2NaOH + H2}\]

What type of reaction is represented by the following equation?

\[\ce{Mg + CuSO4 -> MgSO4 + Cu}\]

What is meant by a displacement reaction? Explain with the help of one example.

What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.

What happens when a zinc strip is dipped into a copper sulphate solution?

1. Write the equation for the reaction that takes place.
2. Name the type of reaction involved.

What happens when a zinc strip is dipped into a copper sulphate solution?
Name the type of reaction involved.

A strip of metal X is dipped in a blue coloured salt solution YSO₄. After some time, a layer of metal Y from the salt solution is formed on the surface of metal strip X. Metal X is used in galvanisation whereas metal Y is used in making electric wires. Metal X and metal Y together form an alloy Z.

1. What could metal X be?
2. What could metal Y be?
3. Name the metal salt YSO₄.
4. What type of chemical reaction takes place when metal X reacts with salt solution YSO₄? Write the equation of the chemical reaction involved.
5. Name the alloy Z.

When a black metal compound XO is heated with a colourless gas Y₂, then metal X and another compound Y₂O are formed. Metal X is red-brown in colour which does not react with dilute acids at all. Gas Y₂ can be prepared by the action of a dilute acid on any active metal. The compound Y₂O is a liquid at room temperature which can turn anhydrous copper sulphate blue.

1. What do you think is metal X?
2. What could be gas Y₂?
3. What is compound XO?
4. What is compound Y₂O?
5. Write the chemical equation of the reaction which takes place on heating XO with Y₂.
6. What type of chemical reaction is illustrated in the above equation?

When a strip of red-brown metal X is placed in a colourless salt solution YNO₃ then metal Y is set free and a blue coloured salt solution X(NO₃)₂ is formed. The liberated metal Y forms a shining white deposit on the strip of metal Х.

1. What do you think metal X is?
2. Name the salt YNO₃.
3. What could be metal Y?
4. Name the salt X(NO₃)₂.
5. What type of reaction takes place between metal X and salt solution YNO₃?