List of top Chemistry Questions asked in COMEDK UGET

An endothermic reaction, $A \to B$ has an activation energy as $x\, kJ/mol$. If the energy change of the reaction is $y\, kJ$, the activation energy of the reverse reaction is
The rate of a chemical reaction doubles for every 10� rise in temperature. If the temperature increases by 60�, the rate of reaction increases
Density of $3\,M$ solution of $NaCl$ is $1.25 \,g/mL$ The mass of the solvent in the solution is
Which of the following inert gas compounds is not formed?
Fullerene with formula $C_{60}$ has a structure where every carbon atom is
For all gases, at any given pressure, the graph of volume vs temperature (in celsius) is a straight line. This graph is called
The temperature of one mole of an ideal gas increases from 298 K when it absorbs 200 J of heat at constant volume. The change in the internal energy of the gas is
Which one of the following ores is obtained by floatation process?
The heat of formation of $ {H_2O_{(l)}}$ is -286 kJ. The? heat of formation of $ { H_2O_{(g)}}$ is likely to be
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 enthalpy of neutralization of HCI and NaOH is x kJ. The heat evolved when 500 ml of 2 N HCl is mixed with 250 mt of 4 N NaOH will be
An electron having spin quantum number, $s = -1/2$ and magnetic quantum number, $m = + 3$ can be present in
The atomic number of the element with highest ionization energy among the following is
For the dissociation of limestone in the slag zone of the blast furnace, the reaction is
100 mL of N/5 HCl was added to 1 g of pure $ {CaCO_3}$ What would remain after the reaction?
IUPAC name of $ {[CrCl_2(NH3)4]NO_3}$ 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
The conjugate acid of $ NH_2^- $ is
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
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