List of top Chemistry Questions

Assume a living cell with 0.9%($w/w$) of glucose solution (aqueous). This cell is immersed in another solution having equal mole fraction of glucose and water. (Consider the data up to first decimal place only) The cell will:

What is the molar mass of a gas, if 2.5 g of the gas occupies 1.12 L at STP?

What is the mass of 0.5 moles of water (H$_2$O)?

How many grams of NaOH are required to neutralize 25 mL of 0.1 M HCl solution?

What is the total number of orbitals in the third energy level (n = 3)?

What is the empirical formula of a compound containing 40% sulfur and 60% oxygen by mass?

Which of the following options represents the correct ionic radii in Å of N^3-, O^2-, and F^- respectively?

Two vessels A and B are connected via stopcock. Vessel A is filled with a gas at a certain pressure. The entire assembly is immersed in water and allowed to come to thermal equilibrium with water. After opening the stopcock the gas from vessel A expands into vessel B and no change in temperature is observed in the thermometer. Which of the following statement is true?

Some CO$_2$ gas was kept in a sealed container at a pressure of 1 atm and at 273 K. This entire amount of CO$_2$ gas was later passed through an aqueous solution of Ca(OH)$_2$. The excess unreacted Ca(OH)$_2$ was later neutralized with 0.1 M of 40 mL HCl. If the volume of the sealed container of CO$_2$ was $x$, then $x$ is ________________________ cm$^3$ (nearest integer). [Given: The entire amount of CO$_2$ reacted with exactly half the initial amount of Ca(OH)$_2$ present in the aqueous solution.]

Why do acidic solutions conduct electricity?

How many among the given species have the highest bond order? CN$^-$, CO, NO$^-$, O$_2$, N$_2$

The following data were obtained for the reaction: \[ 2NO(g) + O_2(g) \rightarrow 2N_2O(g) \] at different concentrations:

The rate law of this reaction is: