Question : Which of the following is not a chemical reaction?
Option 1: Burning of paper
Option 2: Digestion of food
Option 3: Conversion of water into steam
Option 4: Burning of coal
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Correct Answer: Conversion of water into steam
Solution : The correct option is the Conversion of water into steam.
The conversion of water into steam is a physical reaction because it involves the state of matter without altering the chemical composition of water molecules. Heat energy is applied to water, causing it to transition from liquid to gaseous state without forming new substances.
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Question : The enormous amount of energy released in the explosion of an atomic bomb is due to the
Option 1: Conversion of mass into energy
Option 2: Conversion of chemical energy into heat energy
Option 3: Conversion of mechanical energy into nuclear energy
Option 4: Conversion of neutrons into protons
Question : What type of energy conversion takes place in a battery?
Option 1: Chemical energy into light energy
Option 2: Chemical energy into electrical energy
Option 3: Mechanical energy into chemical energy
Option 4: Chemical energy into sound energy
Question : The reaction between an acid and a base to give a salt and water is called______.
Option 1: neutralisation reaction
Option 2: combination reaction
Option 3: displacement reaction
Option 4: decomposition reaction
Question : Indian Railways ferries which of the following commodities the most as per tonnage, as of April 2022?
Option 1: Cement
Option 2: Food grains
Option 3: Coal
Option 4: Steel
Question : Directions: Which one of the given responses is the meaningful order of the following? 1. Farmer 2. Seed 3. Food 4. Cultivation
Option 1: 1, 2, 4, 3
Option 2: 2, 1, 3, 4
Option 3: 4, 2, 3, 1
Option 4: 3, 1, 4, 2
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