List of top Chemistry Questions asked in LPUNEST

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

Number of photons emitted by 10 watt bulb in 10 seconds, if wavelength of light is 1000 \(\AA\) is

K$_{sp}$ of Mg(OH)$_2$ is \(1\times10^{-12}\). 0.01 M MgCl$_2$ solution will precipitate when limiting pH is

In a reaction involving ring substitution of \(C_6H_5Y\), the major product is the meta-isomer. The group \(Y\) can be:

Identify the correct compound formed in the reaction \[ (CH_3)_2NH \xrightarrow[\;KMno_4\;]{} A,\qquad (CH_3)NH \xrightarrow[\;H_2SO_4\;]{} B \]
Statement–I: Glucose is in pyranose form and has free anomeric hydroxyl group. Statement–II: In sucrose, glucose is in pyranose form and fructose is in furanose form.
Gutta-percha, a naturally occurring highly crystalline non-elastic rubber, consists of:
The drug used for the treatment of throat infection is:
Which of the following statement is not correct?
How many monochloro derivatives are possible when 3-methylpentane is subjected to free radical chlorination (including isomers)?
What volume of methane at NTP is formed from 8.2 g sodium acetate fused with soda lime
Hyper conjugation involves overlap of following orbitals
29.5 mg of organic compound contains N. Ammonia from Kjeldahl method absorbed in 20 mL of 0.1 M HCl. Excess acid requires 15 mL of 0.1 M NaOH for neutralization. The percentage of nitrogen in compound is
For the reaction shown, the product formed is:
Carcinogenic pollutant in the following is
The EAN of Co(CO)$_4$ is 35. It attains stability by
For advertisement, the coloured discharge tubes contain
Given catalyst and corresponding process are matched. The mismatch is
Which of the following acts as ‘activator’ in froth flotation process?
For the reaction \[ CO + 2H_2 \xrightarrow{\text{catalyst}} CH_3OH, \] the catalyst used is
Which of the following statement(s) is (are) incorrect for alkali metals?