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Answer:
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I am not see your 3 q.
Explanation:
Q4
ans-The methods for measuring pH fall roughly into the following four categories: Indicator methods. Metal-electrode methods (including the hydrogen-electrode method, quinhydron-electrode method and antimony-electrode method) Glass-electrode method.
Q5
Ans- Newton's first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.