List of top Chemistry Questions

Which of the following is incorrect?

Rank the following compounds in order of increasing basicity.

Ammoniacal silver nitrate forms a white precipitate easily with
Which of the following is incorrect regarding Henry's law?
t-butyl chloride preferably undergo hydrolysis by
Which of these represents the correct order of decreasing bond order?
Pick up the correct statement.
Total number of $\sigma$ and $\pi$ bonds in ethene molecule is
A buffer solution has equal volumes of 0.1 M NH$_3$OH and 0.01 M NH$_4$Cl. The pK$_b$ of the base is 5. The pH is
Assuming no change in volume, the time required to obtain solution of pH = 4 by electrolysis of 100 mL of 0.1 M NaOH (using current 0.5 A) will be

Which of the following compounds would not be expected to decarboxylate when heated?

Which of these molecules have non-bonding electron pairs on the central atom?

For a cell reaction, $ A(s) + B^{2+}(aq) \rightarrow A^{2+}(aq) + B(s) $; the standard emf of the cell is 0.295 V at 25°C. The equilibrium constant at 25°C will be
The correct decreasing order of negative electron gain enthalpy for C, Ca, Al, F and O is

I and II are

Ti$^2+$ is purple while Ti$^4+$ is colourless because
In Friedel-Crafts alkylation reaction of phenol with chloromethane, the product formed will be
Which one of the following is an important component of chlorophyll?
A volatile compound is formed by carbon monoxide and
The complex $ [PtCl_2(en)_2]^{2+} $ ion shows
Bohr's radius of 2nd orbit of $ \text{Be}^{3+} $ is equal to that of
The blue colouration obtained from the Lassaigne's test of nitrogen is due to the formation of
The ion that is isoelectronic with CO is
At 300 K, the half-life period of a gaseous reaction at an initial pressure of 40 kPa is 350 s. When pressure is 20 kPa, the half-life period is 175 s. What is the order of the reaction?
If 2 moles of $ C_6H_6 $ (g) are completely burnt 4100 kJ of heat is liberated. If $ \Delta H^\circ $ for $ CO_2 (g) $ and $ H_2O (l) $ are -410 kJ and -285 kJ per mole respectively then the heat of formation of $ C_6H_6 (g) $ is