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

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 of the following is secondary pollutant?

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

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 ?

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 ?

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s² 2s² 2p³ , the simplest formula for this compound is

Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is

The correction factor ‘a’ to the ideal gas equation corresponds to

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

Iron exhibits bcc structure at room temperature. Above 900°C, it transforms to fcc structure. The ratio of density of iron at room temperature to that at 900°C (assuming molar mass and atomic radii of iron remains constant with temperature) is

Which one is a wrong statement ?