List of top Chemistry Questions asked in Guru Gobind Singh Indraprastha University Common Entrance Test

Choose the most appropriate options. Arrange the following in the decreasing order of basic character: I. p-toluidine II. N,N-dimethyl-p-toluidine III. p-nitroaniline IV. Aniline
Choose the most appropriate options. The magnetic moment of M^{x+} (atomic number = 25) is $\sqrt{5}$ BM. Then, the oxidation number x of M is:
The \( K_{sp} \) for Mn(OH)\(_2\) is \( 1.6 \times 10^{-13} \). What is the molar solubility of this compound in water?

Arrange the following compounds in the increasing order of their reactivity towards HCN: 
I. Acetaldehyde 
II. Acetone 
III. Di-tert-butyl ketone

Which species have delocalised electrons? 

Which one of the following electrolytes is most effective for the coagulation of $Fe(OH)_3$ sol?
What is the minimum number of moles of Pb(NO3) must be added to 0.10L of a solution that is 1.0M in MgCl2 and 1.0 M in KCl? The compound PbCl2 precipitates.
Compared to an electron with a principal quantum number of 1, an electron with a principal quantum number of 2 will have a

Which of the following are true statements? 
I. The heat capacity of a substance is the amount of heat that substance can hold per unit of temperature. 
II. The specific heat for a single substance is the same for all phases of that substance. 
III. When heat is added to a fluid, its temperature will change less if it is allowed to expand.

The following data was obtained for the reaction, 

Choose the most appropriate options. Identify the product B of the following reactions. 

Calculate the rate constant for the radioactive disintegration of an isotope that has a half-life of 6930 yr.
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.

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

Which of the following elements is the most chemically similar to Na?
A student wished to produce only carbon from the dioxide and water vapour combustion of methane, CH\(_4\). To accomplish this the student should
Argon crystallises in fcc arrangement and the density of solid and liquid Ar is 1.59 g/cm\(^3\) and 1.42 g/cm\(^3\), respectively. The percentage of empty space in liquid Ar is
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?
When the following 1.0 mol dm\(^{-3}\) aqueous solutions are arranged in order of increasing pH, which is the correct order?

I. Ammonium chloride
II. Ammonium ethanoate
III. Sodium ethanoate

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:

Choose the one false statement.
The vapour pressure of pure water is 23.5 mm Hg. Then, the vapour pressure of an aqueous solution which contains 5 mass percent of urea is (Molar mass of urea is 60).
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?
A balloon contains 2.0 g of hydrogen gas. A second balloon contains 4.0 g of helium gas. Both balloons are at the same temperature and pressure. Pick the false statement from the following list.
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