List of top Chemistry Questions asked in IPU CET

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:

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?

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?

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?

Which of the following expressions represents the solubility product for Cu(OH)$_2$?

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.

Among $ [\text{Ni(CN)}_4]^{2-} $, $ [\text{NiCl}_4]^{2-} $, and $ [\text{Ni(CO)}_4] $, which one has the following:

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?

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.

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

Ammonia burns in air to form nitrogen dioxide and water. $4{NH}_3(g) + 7{O}_2(g) \longrightarrow 4{NO}_2(g) + 6{H}_2{O}(l) $ If 8 moles of $NH_3$ are reacted with 14 moles of $O_2$ in a rigid container with an initial pressure of 11 atm, what is the partial pressure of $NO_2$ in the container when the reaction runs to completion? (Assume constant temperature)

What is the minimum power required for heat engine to lift a 80 kg mass 5 m in 20 s if it releases 1000 J of heat energy from its exhaust each second?

What happens when the temperature of a reaction increases?

The $ K_{sp} $ for Mn(OH)$_2$ is $ 1.6 \times 10^{-13} $. What is the molar solubility of this compound in water?

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).

How many milliliters of water must be added to 50.0 mL of 10.0 M HNO3 to prepare 4.00 M HNO3?

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.

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