Question:
The pH of pure water at 25\(^\circ\)C is:
The pH of pure water at 25\(^\circ\)C is:
Show Hint
At 25\(^\circ\)C, neutral solutions always have pH = 7.
Updated On: Jan 10, 2026
- 0
- 5
- 7
- 14
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: In pure water at 25\(^\circ\)C:
\[
[\text{H}^+] = [\text{OH}^-] = 10^{-7}\,\text{M}
\]
Step 2: Calculate pH:
\[
\text{pH} = -\log(10^{-7}) = 7
\]
Hence, pure water is neutral.
Was this answer helpful?
0
0
Top LPUNEST Chemistry Questions
- A mixture of CO and CO$_2$ has vapour density 20 at STP. 100 g of this mixture contains ____ mole of CO
- if ideal gas expands at constant temperature
Number of photons emitted by 10 watt bulb in 10 seconds, if wavelength of light is 1000 \(\AA\) is
- The hybridization of atomic orbitals of N in NO$_2^-$, NO$_3^-$ and NH$_4^+$ are respectively
- Bond dissociation energies of \(XY,\;X_2\) and \(Y_2\) (all diatomic molecules) are in the ratio \(1:1:0.5\) and \(\Delta H_f\) of \(XY\) is \(-200\ \text{kJ mol}^{-1}\). The bond dissociation energy of \(X_2\) will be:
View More Questions
Top LPUNEST Some basic concepts of chemistry Questions
- For advertisement, the coloured discharge tubes contain
- The drug used for the treatment of throat infection is:
- Which of the following statement is not correct?
- In hydrogen atom, energy of electron in ground state is \(13.6\,\text{eV}\), then energy of electron in second excited state is
- Vapour density of a compound is \(26\). It contains carbon and hydrogen atoms in the ratio \(1:1\). Its molecular formula is
View More Questions
Top LPUNEST Questions
- Select the answer choice that identifies the noun in the sentence. Sue's parents tried living in the north, but they could not adapt to the cold.
- What is the missing pronoun? The children are coming out of school in a minute. I need to go and pick _____ up.
- Choose the correct order of adjectives to fill the blank. She is a _____ supermodel.
- Which kind of adverb is the word in capitals? "Mothers look GENTLY at their babies."
- Choose the right option to fill the gap. When Pooja arrives, I _____ in my apartment.
View More Questions