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Valencies of aluminium and phosphate are
(a) Aluminium and phosphate ions are represented as Al³+ and PO₄³⁻ respectively. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/
(a) Aluminium and phosphate ions are represented as Al³+ and PO₄³⁻ respectively.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-3/
See lessTwo chemical species X and Y combine together to form a product P which contains both X and Y X + Y → P X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning the species X, Y and P correct? (i) P is a compound. (ii) X and Y are compounds. (iii) X and Y are elements. (iv) P has a fixed composition.
(d) P is obtained by the combination of X and Y. Thus, it is a compound. X and Y cannot be broken into simpler substances. Thus, they are elements. As P is a compound, it has a fixed composition. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
(d) P is obtained by the combination of X and Y. Thus, it is a compound. X and Y cannot be broken into simpler substances. Thus, they are elements. As P is a compound, it has a fixed composition.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-2/
See lessWhat toy would you design to explain a mathematical or scientific concept? Justify your choice.
A balance scale is an excellent toy for explaining weight, equilibrium, and force distribution. Using levers and fulcrums, it visually demonstrates how weights on either side balance or tip. This practical model teaches concepts like equal distribution, torque, and mass comparison in science and matRead more
A balance scale is an excellent toy for explaining weight, equilibrium, and force distribution. Using levers and fulcrums, it visually demonstrates how weights on either side balance or tip. This practical model teaches concepts like equal distribution, torque, and mass comparison in science and mathematics. Its interactive nature makes learning engaging, and its simple design using waste materials like cardboard or bottle caps encourages sustainability and hands-on exploration.
See lessHow does a chain reaction machine work and what materials can be used to create one?
A chain reaction machine operates by transferring energy from one event to another, creating a continuous sequence. For example, a marble rolling down a ramp can knock over dominoes, activating a lever to launch an object. Materials like ramps, levers, pulleys, cardboard, bottle caps, and marbles arRead more
A chain reaction machine operates by transferring energy from one event to another, creating a continuous sequence. For example, a marble rolling down a ramp can knock over dominoes, activating a lever to launch an object. Materials like ramps, levers, pulleys, cardboard, bottle caps, and marbles are commonly used. These machines combine creativity and physics, showcasing the interconnectedness of simple machines in performing complex tasks through sequential energy transfer.
See lessWhat did you learn from peers and experts while making toys or maintaining a bicycle?
Peers demonstrated creativity in designing toys and teamwork during projects. Working together taught me problem-solving and sharing ideas effectively. Experts provided technical knowledge, such as aligning brakes, fixing punctured tyres, and maintaining chains. They also shared tips for using toolsRead more
Peers demonstrated creativity in designing toys and teamwork during projects. Working together taught me problem-solving and sharing ideas effectively. Experts provided technical knowledge, such as aligning brakes, fixing punctured tyres, and maintaining chains. They also shared tips for using tools safely. These interactions deepened my understanding of simple machines, practical applications, and maintenance techniques, making the learning experience both collaborative and insightful.
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