RULEMATH | MATH ONLINE/DIRECT CLASS | MATH WEBSITE | SCIENCE CLASS 10, PHYSICS CLASS 11 AND 12

Class 10 Students can go through this as a ready reckoner for their Science Board Examination  All answers are given in blue   1. Fe + ZnSO₄  No reaction takes place as Iron is less reactive than Zinc 2. What happens when zinc granules is added to freshly prepared ferrous sulphate solution? A greyish black coating is formed. Zinc is more electropositive than iron and so it can displace iron from its solution.  The solution turns colourless from light green. 3. An aqueous solution A turns phenolphthalein solution pink.  On addition of an aqueous solution B to A, the pink colour disappears. What can you say about A and B? A has pH greater than 7 and B has pH less than 7. 4. What happens when ethanol reacts with sodium? Sodium ethoxide is formed  5. What happens when ethanol reacts with potassium permanganate solution? Ethanoic acid 6. Scientific term for studying the development of new types of organisms from the existing ones Evolution  7. Spherical mir...

Class 10 Students can go through this as a ready reckoner for their Science Board Examination  All answers are given in blue 1. What happens when Silver chloride is put under sunlight? Silver metal and chlorine gas are formed . 2. Acid used in refining of petroleum to remove sulphur and other compounds Sulphuric acid 3. The magnetic field lines de to straight wire carrying a current are ___ Circular: Concentric circles with centre at the axis of the conductor. 4. When more than one resistors are in series, the quantity that remains same in them is ________ Current:  Resistors in series have same current 5. The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about _________ 1 percent : The green plants convert this into food energy and make this energy available to the rest of the ecosystem. 6. The property of a proton that can change while it moves freely in a magnetic field Momentum When a proton moves in a magnetic field, i...