List of top Chemistry Questions asked in NEET (UG)

Sc(Z = 21) is a transition element but Zn (Z = 30) is not because :

A button cell used in watches function as following Zn(s) + Ag2O(s) + H2O(l) \(\rightleftharpoons\) 2Ag(s) + Zn2+(aq) + 2OH-(aq). If half cell potentials are \({Zn^{2+}_{ (aq)} + 2e\to Zn(s); E^{\circ} = -0.76V}\) \({Ag2O_{(s)} + H2O_{(l)} + 2e\to 2Ag_{(s)} + 2OH^{-}_{(aq)};}\) \(E^{\circ} = 0.34V\)

Among the following ethers, which one will produce methyl alcohol on treatement with hot concentrated HI ?
The structure of isobutyl group in an organic compound is :-
What is the hybridisation state of benzyl carbonium ? :-
Dettol is the mixture of :
A metal has a $fcc$ lattice. The edge length of the unit cell is $404\, pm$. The density of the metal is $2.72\,g$ $cm^{-3}$. The molar mass of the metal is :
How many grams of cobalt metal will be deposited when a solution of cobalt (II) chloride is electrolyzed with a current of 10 amperes for 109 minutes (1 Faraday = 96,500 C; Atomic mass of Co = 59 u) :
The pair of species that has the same bond order in the following is :
What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? n = 3, l = 1 and m = -1
Nitrobenzene on reaction with conc. $ {HNO_3/H_2SO_4 }$ at $ {80-100^{\circ} C}$ forms which one of the following products ?
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
At $100^\circ C$ the $K_w$ of water is $55\, times$ its value at $25^\circ C$. What will be the pH of neutral solution ? $(log 55 = 1.74)$
A magnetic moment of 1.73 BM will be shown by one among the following :-
Which of the following does not give oxygen on heating ?
Identify the correct order of solubility in aqueous medium :
Which of the following does not give oxygen on heating ?
Which of the following statements about the interstitial compounds is incorrect ?
Which of the following structure is similar to graphite?
The values of $K_{sp}$ of $CaCO_3$ and $CaC_2O_4$ are $4.7 \times 10^{-9}$ and $1.3 \times 10^{-9}$ respectively at $25�C$. If the mixture of these two is washed with water, what is the concentration of $Ca^{2+}$ ions in water?
$XeF_2$ is isostructural with:
Which one of the following molecules contains no $\pi$ bond ?
Which of the following is a polar molecule ?
What is the density of $N_2$ gas at $227°C$ and 5.00 atm. pressure ? (R = 0.082 L Atm $K^{-1} mol^{-1}$)
Bond order of $1.5$ is shown by: