List of top Chemistry Questions asked in AIPMT

The species $ {Ar, K^+}$ and $ {Ca^{2+}}$ contain the same number of electrons. In which order do their radii increase?

The heat of combustion of carbon to $ {CO_2}$ is $ {- 393.5 \, kJ/mol}$. The heat released upon formation of 35.2 g of $ {CO_2}$ from carbon and oxygen gas is:

The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of the pump?

Number of possible isomers for the complex $ {[Co(en)_2Cl_2] Cl}$ will be : (en = ethylenediamine)

Method by which Aniline cannot be prepared is :

"Metals are usually not found as nitrates in their ores". Out of the following two (a and b) reasons which is/are true for the above observation? (a) Metal nitrates are highly unstable. (b) Metal nitrates are hightly soluble in water.

Maximum bond angle at nitrogen is present in which of the following?

Which of the following statements is not correct for a nucleophile ?

Magnetic moment 2.84 B.M. is given by (At. nos, Ni=28, Ti=22, Cr=24, Co=27)

Gadolinium belongs to 4f series. It's atomic number is 64. Which of the following is the correct electronic configuration of gadolinium ?

Which one is most reactive towards nucleophilic addition reaction?

Magnetic moment 2.83 BM is given by which of the following ions? (At. no. Ti =22, Cr=24, M n=25, N i=28)

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of $ {1 \, M \, H_2SO_4}$. The percentage of nitrogen in the soil is :

Identify the wrong statement in the following :

The half life of a radioactive nucleus is $50$ days. The time interval (t$_2-t_1$) between the time t$_2$ when $\frac{2}{3}$ ot it has decayed and the time $t_1$, when $\frac{1}{3}$ of it had decayed is

Predict the products in the given reaction,

Measuring Biochemical Oxygen Demand (BOD) is a method used for

Which one of the following sets forms the biodegradable polymer ?

Which of the following exhibits only + 3 oxidation state ?

Which of the following compounds can be used as antifreeze in automobile radiators ?

Which nomenclature is not according to IUPAC system?

Identify the alloy containing a non-metal as a constituent in it

An organic compound $(C_3H_9N)$ $(A)$, when treated with nitrous acid, gave an alcohol and $N_2$ gas was evolved. $(A)$ on warming with $CHCl_3$ and caustic potash gave $(C)$ which on reduction gave isopropylmethyl amine. Predict the structure of $(A)$.

Which one of the following is a mineral of iron ?

Which of the two ions from the list given below, have the geometry that is explained by the same hybridisation of orbitals $NO^- _ 2 ,NO_3^- , NH_2^- , NH_4^+,SCN ^- ?$