List of top Chemistry Questions asked in NEET (UG)

Which of the following is incorrect statement ?

The rate of radioactive disintegration at an instant for a radioactive same of half life $2.2 \times 10^9\,s^{-1}$ is $10^{10} \,s^{-1}$. The number of radioactive atoms in that sample at that instant is,

Which will make basic buffer?

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :

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

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 $\left[ Ag ^{+}\right]$?

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

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

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 ?

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

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

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

A mixture of $2.3 \,g$ formic acid and $4.5 \,g$ oxalic acid is treated with cone. $H_2SO_4$. The evolved gaseous mixture is passed through $KOH$ pellets. Weight (in $g$ ) of the remaining product at $STP$ will be

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 ?

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

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

Which of the following compounds can form a zwitterion ?

Consider the following species :
CN⁺, CN^–, NO and CN
Which one of these will have the highest bond order ?