List of top Chemistry Questions asked in NEET (UG)

The pyknometric density of sodium chloride crystal is 2.165×103 kg m–3 while its X-ray density is 2.178×103 kg m–3. The fraction of unoccupied sites in sodium chloride crystal is:
Which one of the following octahedral complexes will not show geometric isomerism? (A and B are monodentate ligands)
The number of unpaired electrons in the complex ion \([CoF_6]^{3–}\) is: (Atomic No.of Co = 27) 
Which one of the following characteristics of the transition metals is associated with their catalytic activity:
For the reaction: \(C_3H_8(g)+5O_2(g)→3CO_2(g)+4H_2O(l)\) at constant temperature, ∆H–∆E is:
Which of the following statements is not correct for sigma and pi-bonds formed between two carbon atoms:
Which one of the following compounds is not a protonic acid:
In the following reaction product 'P' is :
Pd-BaSO4
What is P in the given chemical reaction?
What is P in the given chemical reaction?

Which of the following order is wrong :

When CH3CH2CHCl2 is treated with NaNH2, the product formed is 

The atomic numbers of Cr and Fe are respectively 24 and 26, which of the following is paramagnetic with the spin of the electron :
In the above reaction product 'P' is :
Monomer of – C – CH2 – CH3 CH3 is : 

Geometrical isomers are differ in 

The percentage of C, H and N in an organic compound are 40%, 13.3% and 46.7% respectively then emprirical formula is 

Reaction BaO2 (s)\(\rightleftharpoons\) BaO (s) + O2(g); ∆H = + ve. In equilibrium condition. The pressure of O2 depends on :

2A \(\rightarrow\) B + C
It would be a zero-order reaction when
Unit of entropy is : -
Which has maximum number of molecules :-

Number of atom per unit cell in B.C.C.

General electronic configuration of lanthanides is

When phenol is treated with CHCl3 and NaOH, the product formed is 

Solution of $0.1 \,N\, NH_4OH$ and 0.1 N $NH_4Cl$ has pH 9.25. Then $pK_b$ of $NH_4OH$ :-
Z in the above reaction sequence is :-