List of top Chemistry Questions

Lanthanoid which has the smallest size in \( +3 \) state is:
Which of the following tests is positive for the given compound [A]? 
tests is positive
The number of hydrogen bonds formed by a water molecule at normal conditions is:
Which of the following relation is not correct?
Which of the following arrangements does not represent the correct order of the property stated against it?
Phenol does not undergo nucleophilic substitution reaction easily due to:
Which of the following statements is false?
Which of the following alkyl halides will undergo \( S_N1 \) reaction most readily?
Which of the following does not form a chelate?
The reaction 
Gattermann-Koch reaction
How many conformations are possible for ethane?
The statement that is not correct for periodic classification of elements is:
100 mL of 0.04 N HCl aqueous solution is mixed with 100 mL of 0.02 N NaOH solution. The pH of the resulting solution is:
Element not showing variable oxidation state is:
The greater the valence of the flocculating ion added, the greater is its power to cause precipitation of a colloid. This rule is:
The reaction at cathode in the cells commonly used in clocks involves.
Total number of species from the following which can undergo disproportionation reaction _______.
$\text{H}_2\text{O}_2, \text{ClO}_3^-, \text{P}_4, \text{Cl}_2, \text{Ag}, \text{Cu}^{+1}, \text{F}_2, \text{NO}_2, \text{K}^+$
Consider the following reactions
Chemical Reaction
The number of protons that do not involve in hydrogen bonding in the product B is______.
An organic compound contains 37.5% C, 12.5% H and the rest oxygen. What is the empirical formula of the compound?
At 300 K, the vapour pressure of liquids A and B are 600 and 500 mm of Hg respectively. Two moles of A and three moles of B are mixed. The mole fractions of A and B in vapor state are respectively
A transition metal 'M' among Sc, Ti, V , Cr, Mn and Fe has the highest second ionisation enthalpy. The spin only magnetic moment value of M+
ion is ______ BM (Near integer) (Given atomic number Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)
What are the 4 types of hydrocarbons?

Find the time required to complete a reaction 90% if the reaction is completed 50% in 15 minutes.

Magnetic Moment of \( \text{Mn}^{2+} \) is:
IUPAC Name of Glyceraldehyde is: