List of top Chemistry Questions asked in COMEDK UGET

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
Abnormal colligative properties are observed only when the dissolved non-volatile solute in a given dilute solution
Aqueous CuSO$_4$ changes its colour from sky blue to deep blue on addition of NH$_3$ because

Identify A, B, and C in the following reactions:

For a reaction, $ 2A + B \to \text{products} $, if concentration of B is kept constant and concentration of A is doubled, then rate of reaction is
For an adiabatic change in a system, the condition which is applicable is
In dilute alkaline solution, $ \text{MnO}_4^- $ changes to

Which of the following complex show optical isomerism?
$(i) \text{cis} - [\text{COCl}(\text{en})_2 (\text{NH}_3)]^{2+} $ 
$(ii) \text{cis} - [\text{CrCl}_2(\text{ox})_2]^{3-}$ 
$(iii) \text{cis} - [\text{CO}(\text{en})_2\text{Cl}_2]\text{Cl}$ 
$(iv) \text{cis} - [\text{CO}(\text{NH}_3)_4 \text{Cl}_2]^+$

The following reaction takes place:

Mohr's salt has the formula

The product P in the reaction,

Gabriel's synthesis is used frequently for the preparation of which of the following? 

Acetophenone when reacted with a base, $ C_6H_5ONa $, yields a stable compound which has the structure

Product of the following reaction is

Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine?
The chemical formula of Lucas reagent is

Which of the following are not path functions? 
I. H - T S 
II. W 
III. q 
IV. q + W 
 

A newly prepared radioactive nuclide has a decay constant of 6.93 s\(^{-1}\). What is the half-life of the nuclide?
X and Y in the following reactions are:
(CH3–CH2)2C=O → HCN/KCN → X → LiAlH4 → (CH3)2C(OH)CH2NH2

Identify the product formed in the given reaction. 

Which of the following artificial sweeteners can be used in soft drinks only?
The equilibrium constant, \(K_C\) for \(3C_2H_2(g) \rightleftharpoons C_6H_6(g)\) is 4 L\(^2\)mol\(^{-2}\). If the equilibrium concentration of benzene is 0.5 mol/L, then what is the value of concentration of ethylene?
Which of the following show both Frenkel and Schottky defect?
What will be the density of \( N_2 \) gas at 230°C and 3 atm pressure? (Given \( R = 0.082 \, \text{L atm} \, \text{mol}^{-1} \, \text{K}^{-1} \))
On treatment of glucose with bromine water the product formed is