List of top Questions asked in IPU CET

The energy required to excite the electron in the atom from n=1 to n=2, when the ionisation enthalpy of hydrogen atom is \(1.312 \times 10^6\) J/mol will be (in the unit of \(10^5\))
Beyond the critical point of H2O
For the isoelectronic series \(S^{2-}, Cl^{-}, Ar, K^{+}\) and \(v\), which species requires the least energy to remove an outer electron?
Which of the following stereoisomers is a major image of itself?
When 2.00 g of a certain volatile liquid is heated, the volume of the resulting vapour is 821 mL at a temperature of 127°C at standard pressure. The molecular mass of this substance is:
Given a molecule with the general formula AB, which one of the following would be the most useful in determining whether the molecule was bent or linear?
Which of the following represents an ester?
On combustion of x-g of ethanol in a bomb calorimeter, y-joules of heat energy is produced. The heat of combustion of ethanol (\(\Delta H_{{comb}}\)) is

The rate of the chemical reaction between substance A and B is found to follow the rate law. rate = \( k[A]^2[B] \), where k is the rate constant. The concentration of A is reduced to half of its original value. To make the reaction occur at 50% of its original rate, the concentration of B should be

When 4A of current is passed through a 1.0L, 0.10 M Fe\(^3+\)(aq) solution for 1 hour, it is partly reduced to Fe(s) and partly to Fe\(^2+\)(aq). Identify the incorrect statement.
Which one of the following electrolytes is most effective for the coagulation of $Fe(OH)_3$ sol?
Which of the following choices represents \(^{239}_{94}Pu\) producing a positron?
Calculate the mass percent of 60 g H2SO4 dissolved in the solution of 180 mL of water.
Among all the given compounds, which will have D-configuration?
All of the following may be true concerning catalysts and the reaction which catalyse except,
\(\text{NH}_3\) has a \( K_b \) of \( 1.8 \times 10^{-3} \). Which of the following has a \( 5.6 \times 10^{-10} \)?
Among \( [\text{Ni(CN)}_4]^{2-} \), \( [\text{NiCl}_4]^{2-} \), and \( [\text{Ni(CO)}_4] \), which one has the following:
Which of the following expressions represents the solubility product for Cu(OH)$_2$?
An object experiences a greater buoyant force in seawater than in fresh water. The most likely reason for this is
The reaction below represents the Haber process for the industrial production of ammonia, \[ N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g); \Delta H^\circ = -92 \, {kJ} \] The optimum conditions of temperature and pressure are chosen as a compromise between those that favour a high yield of ammonia and those that favour a fast rate of production. Economic considerations are also important. Which statement is correct?
Ammonia reacts with water to form the ammonium ion and hydroxide ion. \[ {NH}_3 + {H}_2{O} \longrightarrow {NH}_4^+ + {OH}^- \] According to the Bronsted-Lowry definition of acids and bases, what is the conjugate acid of ammonia?

The first step in producing pure lead from galena $(PbS)$ is as follows: $ 2{PbS}(s) + 3{O}_2(g) \longrightarrow 2{PbO}(s) + 2{SO}_2(g) $. 
All of the following are true concerning this reaction except:

When the solids Ba(OH)2 and NH4SCN are mixed, a solution is produced and the temperature drops. \[ {Ba(OH)}_2(s) + 2{NH}_4{SCN}(s) \rightarrow {Ba(SCN)}_2(aq) + 2{NH}_3(g) + 2{H}_2{O}(l) \] Which statement about the energetics of this reaction is correct?
A student wished to produce only carbon from the dioxide and water vapour combustion of methane, CH\(_4\). To accomplish this the student should
Which of the following elements is the most chemically similar to Na?