List of top Chemistry Questions

The heat of neutralization is maximum for:
Among the following, the correct condition(s) for spontaneity is(are)
Which of the following has the highest boiling point?
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 molecules are present in 4.4 grams of CO\(_2\)? 
(Molar mass of CO\(_2\) = 44 g/mol, Avogadro's number = \(6.022 \times 10^{23}\))

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 \( H_2 \) 

The product obtained on the reaction of propanone with \( CH_3MgBr \) followed by hydrolysis is
The reagent for Etard's reaction is:
Which of the following sodium salts of carboxylic acid is used for the preparation of n-hexane by Kolbe's electrolytic method?
The reagent used for the conversion of carboxylic acids to primary alcohols is
Which has intramolecular hydrogen bonding?
Ortho nitrophenol, Para nitrophenol
The pKa value of a 0.1 M solution of a weak acid HA with pH = 4 is:
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
Name of the reaction in which benzoyl chloride is converted to benzaldehyde is
What are X, Y, Z respectively in the following reaction sequence?
CH$_3$CH=CHCH$_3$ $\xrightarrow{X}$ CH$_3$COOH $\xrightarrow{Y}$ CH$_3$CO-Cl $\xrightarrow{Z, C6H5NH2}$ C$_6$H$_5$NHCOCH$_3$
The compound that gives iodoform test is:
Cannizzaro reaction is shown by aldehydes which:
Which one of the following statements is not correct?
Which of the following is an incorrect statement about the compounds of group 13 elements?
The incorrect statement about the oxidation states of group 14 elements is
Thionyl chloride on reaction with white phosphorus gives a compound of phosphorus 'C' which on hydrolysis gives an oxo acid 'O'. The correct statements about C and O are
I. Shape of 'C' is pyramidal
II. 'O' is a dibasic acid
III. 'O' is a monobasic acid
IV. 'C' on reaction with acetic acid gives 'O'
Consider the following
Assertion (A): phosphorus can form both phosphorus (III) and phosphorus (V) chlorides but nitrogen cannot form nitrogen(V) chloride.
Reason (R): The electronegativity of nitrogen is more than that of phosphorus
The correct answer is
Which acid is the strongest: HF, HCl, HBr, HI?
Which gas is known as laughing gas?