List of top Chemistry Questions asked in COMEDK UGET

IUPAC name of $ {[CrCl_2(NH3)4]NO_3}$ is
Number of atoms in 560 $cm^3$ of oxygen at S.T.P. is
The volume of $CO_2$ (in $cm^3$) liberated at S.T.P. when 1.06 g of anhydrous sodium carbonate is treated with excess of dilute HCl is [atomic mass of Na= 23]
The heat of formation of $ {H_2O_{(l)}}$ is -286 kJ. The? heat of formation of $ { H_2O_{(g)}}$ is likely to be
The atomic number of the element with highest ionization energy among the following is
Which one of the following ores is obtained by floatation process?
For the dissociation of limestone in the slag zone of the blast furnace, the reaction is
The conjugate acid of $ NH_2^- $ is
The oxidation number of oxygen is -1 in
In Lassaigne's test for nitrogen in an organic compound, the blue colouration is due to the formation of
Two ions $A^+$ and $B^-$ have radii 104 and 200 pm respectively, in a cubic close packed crystal of compound AB. The co-ordination no. of A is
An electron having spin quantum number, $s = -1/2$ and magnetic quantum number, $m = + 3$ can be present in
The ionisation constant of phenol is higher than that of ethanol because
The mole fraction of benzene in a solution containing 39% by mass in an organic solvent of molecular mass 122 is
The rate equation of a gaseous reaction is given by, $r = k[A][B]$. If the volume of reaction vessel is suddenly reduced to half of the initial volume, the reaction rate relating to the original rate will be
Phenyl isocyanide is formed when chloroform is treated with alcoholic potassium hydroxide and
Which of the following does not undergo aldol condensation reaction?
The pH of boiling water is 6.4. This implies that boiling water is
The effective atomic number (EAN) of central metal atom in $ {[Co(NH3)6]Cl_3}$ is (at. no. of Co=27]
A negative catalyst will
Oxidative rancidity of oils can be prevented by adding
The dissociation constant of a weak base is $ {1 \times 10^{-5}}$ at 25?C. The pH of its 0.1 M solution at the same temperature.will be .
ln cuprarnmonium sulphate, copper is
Isopropyl chloride and isobutyl chloride reacts with sodium in ether to give?
The conjugate acid of $ {HCO_3^-}$ is