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Q1. Which sub-atomic particle was discovered by J.J. Thomson? a) Proton b) Neutron c) Electron d) Positron Answer: c) Electron Explanation: J.J. Thomson discovered the electron in 1897. His experiments with cathode rays led to the identification of the electron as a fundamental sub-atomic particle carrying a negative charge. Q2. What was the main conclusion … Read more
Q1. What was the primary purpose of the wheel’s invention in transportation? a) To increase the speed of travel b) To facilitate air travel c) To improve the efficiency of pulling loads d) To navigate water routes more effectively Answer: c) To improve the efficiency of pulling loads Explanation: The invention of the wheel significantly … Read more
Q1. What is a luminous object? a) An object that reflects light b) An object that absorbs light c) An object that emits light d) An object that changes light into another form of energy Answer: c) An object that emits light Explanation: Luminous objects are those that emit light of their own. Examples include … Read more
Q1. How is the poverty line estimated in India? a) Based on income level b) Based on consumption and income levels c) Based on the level of education d) Based on employment status Answer: b) Based on consumption and income levels Explanation: In India, the poverty line is estimated based on income or consumption levels. … Read more
Q1. Why are elections necessary in a democracy? a) To appoint the heads of government departments b) To allow citizens to govern directly c) To choose representatives who make decisions on behalf of the people d) To fulfill international obligations Answer: c) To choose representatives who make decisions on behalf of the people Explanation: In … Read more
NCERT Solutions Intext Questions: Question 1: Do most leaders fulfill their election promises? Answer: Many leaders make big promises during elections to get votes. But after elections, they often forget these promises and do not fulfill them. Question 2: The time is after midnight. An expectant crowd sitting for the past five hours in a … Read more
Question 1: Fill in the blanks: (a) A device that is used to break an electric circuit is called _______________. (b) An electric cell has _______________ terminals. Answer: (a) A device that is used to break an electric circuit is called a switch. A switch is essential in controlling the flow of electric current in … Read more
Q1. What is the purpose of using an electric cell in devices like torches and clocks? a) To provide a continuous supply of electricity b) To light up the device c) To produce electricity from chemicals stored inside d) To connect different parts of the device Answer: c) To produce electricity from chemicals stored inside … Read more
In-text Questions and Answers: 1. Did you enjoy discovering and exploring the world around you in the Preparatory Stage of school? Answer : Yes, discovering and exploring the world around us during the Preparatory Stage of school is always an enjoyable experience. 2. Have you ever looked up at the night sky and wondered why … Read more
1. Choose the correct answer from the four alternatives given below. (i) Which one of the following places receives the highest rainfall in the world? (a) Silchar (b) Mawsynram (c) Cherrapunji (d) Guwahati Answer: (b) Mawsynram (ii) The wind blowing in the northern plains in summers is known as: (a) Kaal Baisakhi (b) Loo (c) … Read more