List of top Chemistry Questions asked in NEET (UG)

A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?

The bond dissociation energies of $X_2 , Y_2$ and $XY $ are in the ratio of $1 : 0.5 :1. \Delta H$ for the formation of $XY$ is - $200\, kJ\, mol^{-1}$. The bond dissociation energy of $X_2$ will be

The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is

Which of the following carbocations is expected to be most stable ?

Which of the following oxides is most acidic in nature ?

Which of the following carbocations is expected to be most stable ?

The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is

Given van der Waals constant for $NH _{3}, H _{2}, O _{2}$ and $CO _{2}$ are respectively $4.17, 0.244, 1.36$ and $3.59$, which one of the following gases is most easily liquefied?

The bond dissociation energies of X₂ , Y₂ and XY are in the ratio of 1 : 0·5 : 1. ΔH for the formation of XY is – 200 kJ mol^–1 . The bond dissociation energy of X₂ will be

Which of the following molecules represents the order of hybridisation sp² , sp² , sp, sp from left to right atoms ?

When initial concentration of the reactant is doubled , the half-life period of a zero order reaction

The difference between amylose and amylopectin is

Compound $A, C_8H_{10}O$, is found to react with $NaOI$ (produced by reacting $Y$ with $NaOH$) and yields a yellow precipitate with characteristic smell. $A$ and $Y$ are respectively

Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity ?

Which of the following is secondary pollutant?

The two functional groups characteristic of sugars are

On which of the following properties does the coagulating power of an ion depend ?

Considering Ellingham diagram, which of the following metals can be used to reduce alumina ?

In which case is the number of molecules of water maximum ?

Regarding cross-linked or network polymers, which of the following statements is incorrect ?

Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations :

1. \(60ml\frac{M}{10}HCL+40ml\frac{M}{10}NaOH\)
2. \(55ml\frac{M}{10}HCL+45ml\frac{M}{10}NaOH\)
3. \(75ml\frac{M}{5}HCL+25ml\frac{M}{5}NaOH\)
4. \(100ml\frac{M}{10}HCL+100ml\frac{M}{10}NaOH\)

pH of which one of them will be equal to 1 ?

The compound A on treatment with Na gives B, and with PCl₅ gives C. B and C react together to give diethyl ether. A, B and C are in the order

Identify the major products P, Q and R in the following sequence of reactions :

The compound C₇H₈ undergoes the following reactions :

The product ‘C’ is

Which of the following compounds can form a zwitterion ?