List of top Questions asked in LPUNEST

Gutta-percha, a naturally occurring highly crystalline non-elastic rubber, consists of:
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.
The drug used for the treatment of throat infection is:
Which of the following statement is not correct?
The EAN of Co(CO)$_4$ is 35. It attains stability by
Carcinogenic pollutant in the following is
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
Hyper conjugation involves overlap of following orbitals
What volume of methane at NTP is formed from 8.2 g sodium acetate fused with soda lime
For the reaction shown, the product formed is:
How many monochloro derivatives are possible when 3-methylpentane is subjected to free radical chlorination (including isomers)?
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?
The structures of quartz, mica and asbestos have the common basic unit of
For advertisement, the coloured discharge tubes contain
Given catalyst and corresponding process are matched. The mismatch is
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:
Van’t Hoff factors of aqueous solutions of \(X, Y, Z\) are \(1.8,\;0.8\) and \(2.5\) respectively. Hence, their:
On the basis of information available for the reaction \[ \frac{4}{3}\,\text{Al} + \text{O}_2 \rightarrow \frac{2}{3}\,\text{Al}_2\text{O}_3, \quad \Delta G = -827\,\text{kJ mol}^{-1}\ \text{of } \text{O}_2, \] the minimum emf required to carry out electrolysis of \(\text{Al}_2\text{O}_3\) is: (Given \(1\,F = 96500\,\text{C}\))
Consider a successive reaction (all first order) \[ A \xrightarrow{k_1} B \xrightarrow{k_2} C \xrightarrow{k_3} D \] The incorrect statement is:
Assertion (A): Colloidal solution is electrically neutral. Reason (R): Due to similar nature of the charge carried by the particles, they repel each other and do not combine to form bigger particles.
Which is the most basic oxide?
If n integers taken at random are multiplied together, the probability that the last digit of the product is 1, 3, 7 or 9 is
If \[ \tan\beta = 2\sin\alpha \sin\gamma \cdot \csc(\alpha+\gamma), \] then \(\cot\alpha,\; \cot\beta,\; \cot\gamma\) are in: