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pH of water at 24°c is 7. What effect does increase in temperature results in pH of water?
1)pH will be more than 7
2) pH will be less than 7
3) pH will be equal to 7
4) can't be determined
Option 2 is correct ans .
Dissociation of water is an endothermic reversible reaction.
When temperature is increased , for an endothermic reaction in equilibrium , it shifts the equilibrium to forward direction i.e. more product is formed which in this case means : more water is dissociated ( more H+ concentration ) is obtained . Ph= negative logarithm of H+ concentration so, more H+ concentration means, lesser Ph. so , whole ph range gets changed when temperature is increased i.e at that time, our neutral point is lesser than 7 but, still water is neutral !
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Why is sky red/yellow in the evening and blue in the day?
At dawn and dusk, large amount of blue and violet light(shorter wavelength) has been scattered so, the light that is recieved by an observer is mostly of a longer wavelength and therefore appears to be red.
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How to make a dynamic website ? What language should I learn?
First learn basic HTML, then CSS and responsive CSS for Static websites and thereafter JavaScript and PHP for dynamic pages. If you also want to learn jQuery for more better works learn it at the same time with JavaScript
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What is the minimum distance between a source of the sound and a reflector to hear an echo?
Let S be the distance between the source of sound and reflector.
V be the velocity of sound in air.
t be the total time taken by the sound to travel from source to reflector and back to the source.
2S = Vt
or, S = (Vt)/2
We can hear distinct sounds if they reach our ear after an interval of 0.1s or more
That is, t = 0.1s and V = 340 ms-1
Therefore, S = (340 x 0.1)/2 = 17 m.
This is required minimum distance to hear an echo.
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What is the IUPAC name of this compound.?
@sandesh_Ghimire where is iodo group? You have not mentioned.
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Is there any effect of gravity on fire??
There is, for sure, effect of gravity on fire. We know for a fact that fires on Earth are "pointy" while those in zero-gravity are "round". This is because fire is simply glowing gas. Gas is matter and matter has weight. For a body to have weight, gravity must influence it in some way.
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