List of top Chemistry Questions asked in LPUNEST

Which of the following solutions is the most acidic?
$1.0 \times 10^{-4} \text{ M } \text{HCl}$ is diluted 10 times. The $\text{pH}$ of the final solution is:
The $\text{pH}$ of a solution with $[\text{H}^+] = 3.2 \times 10^{-3} \text{ M}$ is closest to:
The $\text{pH}$ of pure water at $25^{\circ}\text{C}$ is:
$10^{-6} \text{ M } \text{NaOH}$ is diluted 100 times. The $\text{pH}$ of the diluted base is:
The pH of a solution with \([\text{H}^+] = 3.2 \times 10^{-3}\,\text{M}\) is closest to:
\(10^{-6}\,\text{M}\) NaOH is diluted 100 times. The pH of the diluted base is:
The pH of pure water at 25\(^\circ\)C is:
Which of the following solutions is the most acidic?
\(1.0 \times 10^{-4}\,\text{M}\) HCl is diluted 10 times. The pH of the final solution is:
The correct order of increasing chemical reactivity of the following metals is:
Arrange the following bases in increasing order of their basic strength:

Sodium hydroxide
Magnesium hydroxide
Aluminium hydroxide
Ammonium hydroxide
Select the correct answer using the code given below:
Ammonia evolved from \(0.75\,\text{g}\) of the soil sample in the Kjeldahl’s method for nitrogen estimation neutralises \(10\,\text{mL}\) of \(1\,\text{M}\) \(H_2SO_4\). Find the percentage of nitrogen present in the soil.
The main constituent of vinegar is:
Which of the following is liquid at ordinary temperature?
Which one of the following salts when dissolved in water makes the solution basic?
The early attempt to classify elements as metals and non-metals was made by:
The long form of the periodic table consists of:
Which of the following pair is/are correctly matched?

Isotopes : Atoms with same atomic number but different atomic mass
Isobars : Atoms with same number of neutrons but different atomic number
Isotones : Atoms with same mass number but different atomic number
Select the correct answer using the code given below:
The octet rule is not valid for which one of the following molecules?
The rusting of an iron nail:
The process of change of liquid state into gaseous state at constant temperature is known as:
Which one is a sublime substance?
Which one among the following statements about atoms is not correct?
Which of the following is not a synthetic fibre?