Question 5. What is the Physical State of Water at (a) 25°c (b) Exercise Chapter 1 Matter in Our Surrounding

Question 5. What is the physical state of water at (a) 25°C (b) 0°C (c) 100°C? Ques Chapter 1: Matter in Our Surrounding Science Class 9 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. Question 5. What is the physical state of water at (a) 25°C (b) 0°C (c) 100°C? Question 6. Give two reasons to justify (a) Water at room temperature is a liquid. (b) an iron almirah is a solid at room temperature. Question 7. Why is ice at 273 K more effective in cooling than water at the same temperature? is solved by our expert teachers. You can get ncert solutions and notes for class 9 chapter 1 absolutely free. NCERT Solutions for class 9 Science Chapter 1: Matter in Our Surrounding is very essencial for getting good marks in CBSE Board examinations

Question 5. What is the physical state of water at (a) 25°C (b) 0°C (c) 100°C?
Answer: (a) Liquid, (b) Solid and (c) gas.

Question 6. Give two reasons to justify
(a) Water at room temperature is a liquid.
(b) an iron almirah is a solid at room temperature.
Answer: (a) water at room temperature is liquid because at this temperature (i)it has fixed volume and (ii)it can flow.
(B) An iron almirah is solid at room temperature because at this temperature (i) it has definite shape along with fixed volume and (ii) It can not flow like water and hence does not possess fluidity.

Question 7. Why is ice at 273 K more effective in cooling than water at the same temperature?
Answer: At 273K or 0 ºC the ice will give more cooling than water because it can absorb more heat than water due to its latent heat of fusion.