English Medium कक्षा १० - CBSE Question Bank Solutions for Science

 Explain the terms Corrosion

 Which metals do not corrode easily?

What are alloys?

Which of the following methods is suitable for preventing an iron frying pan from rusting?

Give reasons:

Platinum, gold and silver are used to make jewellery.

How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.

Draw a ray diagram to explain the term angle of deviation.

 Why do the component colours of incident white light split into a spectrum while passing through a glass prism, explain

In the following diagram the correctly marked angles are : 

(a) ∠A and ∠e

(b) ∠i, ∠A and ∠D

(c) ∠A ∠r and ∠e

(b) ∠A ∠r and ∠D

Study the following ray diagram:

In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by

(A) y, p, z

(B) x, q, z

(C) p, y, z

(D) p, z, y

Define the term dispersion of white light.

Draw a ray diagram to show the dispersion of white light.

State the cause of dispersion of white light

What is observed when a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube? Write equation for the chemical reaction involved and name the type of reaction in this case.

The figure shows a solenoid wound on a core of soft iron. Will the end A be a N pole or S pole when the current flows in the direction shown?  

 Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.

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

PQ + RS → PS + RQ

What type of reaction is represented by the following equation?

CuSO₄ + 2NaOH → Cu(OH)₂  + Na₂SO₄

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

What happens when silver nitrate solution is added to sodium chloride solution?
 Name the type of reaction involved.