List of top Chemistry Questions

The van der Waals equation for \(n\) moles of gas is:
Among the following, the correct condition(s) for spontaneity is(are)
Which of the following has the highest boiling point?
The enthalpy change for the reaction \(2\text{C(graphite) + 3\text{H}_2(g) \rightarrow \text{C}_2\text{H}_6(g)\) is called:}
2.8 \( \times 10^{-3} \) mol of \( \text{CO}_2 \) is left after removing \( 10^{21} \) molecules from its ‘\( x \)’ mg sample. The mass of \( \text{CO}_2 \) taken initially is: Given: \( N_A = 6.02 \times 10^{23} \, \text{mol}^{-1} \)
What is the number of moles in 18 g of water (\( \text{H}_2\text{O} \))?
What is the molar mass of NaCl?

Calculate the number of moles present in 9.10 × 1016 kg of water.

A solution contains 10 g of NaOH dissolved in 500 mL of water. What is the molarity of the NaOH solution?

Among $ 10^{-10} $ g (each) of the following elements, which one will have the highest number of atoms? 
Element : Pb, Po, Pr and Pt

Calculate the mass in kg of 4.48 dm$^3$ carbon dioxide at STP.
Total pressure of the solution is 500, the partial pressure of component A is 400, and the partial pressure of component B is 575. What is the mole fraction of component B?

Arrange the following in decreasing order of number of molecules contained in:
(A) 16 g of \( O_2 \) 
(B) 16 g of \( CO_2 \) 
(C) 16 g of \( CO \) 
(D) 16 g of \( H_2 \) 

Two 1 L flasks at T(K) contain O2 and helium with rms velocities of x m s-1 and y m s-1, respectively. What is the relationship between x and y?
Which option has the greatest mass?
How many moles are present in $ 22\, \text{g} $ of carbon dioxide (CO$_2$)? (Molar mass of CO$_2$ = $ 44\, \text{g/mol} $)
How many grams of $ \mathrm{Al_2(SO_4)_3} $ are required to produce 10 L of a 0.5 M solution? (Molar mass = 342 g/mol)

How many molecules are present in 4.4 grams of CO\(_2\)? 
(Molar mass of CO\(_2\) = 44 g/mol, Avogadro's number = \(6.022 \times 10^{23}\))

Which of the following reagents is used in Rosenmund reduction?
Which of the following compounds gives a secondary alcohol upon reaction with methylmagnesium bromide?
The reagent for Etard's reaction is:
Name of the reaction in which benzoyl chloride is converted to benzaldehyde is
Compound given below will produce effervescence when mixed with aqueous sodium bicarbonate solution
Which has intramolecular hydrogen bonding?
Ortho nitrophenol, Para nitrophenol
When benzene is treated with carbon monoxide and hydrogen chloride in the presence of anhydrous aluminium chloride, benzaldehyde is formed. The reaction is known as