List of top Questions asked in NEET (UG)

For the second period elements the correct increasing order of first ionisation enthalpy is :

What is the correct electronic configuration of the central atom in \(K_4[Fe(CN)_6]\) based on crystal field theory?

The correct structure of tribromooctaoxide is:

Among the following, the reaction that proceeds through an electrophilic substitution, is:

The compound that is most difficult to protonate is:

\(pH\) of a saturated solution of \(Ca(OH)_2\) is \(9\). The solubility product \((K_{sp})\) of \( Ca(OH)_2\) is: 

Which of the following is an amphoteric hydroxide?

The manganate and permanganate ions are tetrahedral, due to:

Under isothermal condition, a gas at 300 K expands from 0.1 L. to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given that 1 L bar=100J]

Conjugate base for Brönsted acids \(H_2O\) and \( HF\) are

Which is the correct thermal stability order for\( H_2E\) (E=O, S, Se, Te and Po)? 

Match the Xenon compounds in Column-I with its structure in Column II and assign the correct code:

Column I		Column II
A	\(XeF_4\)	I	pyramidall
B	\(XeFe_6 \)	II	square planar
C	\(XeOF_4  \)	III	distorted octahedral
D	\(XeO_3\)	IV	square pyramidal

Code:

Which will make basic buffer?

Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:

Which of the following diatomic molecular species has only bonds according to Molecular Orbital Theory?

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:

Which of the following reactions are disproportionation reaction?
a)\(2Cu^{+}\rightarrow Cu^{2+}+Cu^{0}\)
\(b)3MnO_4^{2-}+4H^{+} \rightarrow2MnO_4^{-}+MnO_2+2H_2O\)
\(c)2KMnO_4\frac{\Delta}{\rightarrow}K_2MnO_4+MnO_2+O_2\)
\(d)2MnO_4^{-}+3Mn^{2+}+2H_2O \rightarrow 5MnO_2+4H^\oplus\)
Select the correct option from the following:

Among the following, the one that is not a green house gas is

If the rate constant for a first order reaction is k the time (t) required for the completion of 99% of the reaction is given by:

For an ideal solution, the correct option is:

For a cell involving one electron \(E^\ominus cell=0.59V\) at 298 K, the equilibrium constant for the cell reaction is: [Given that \(\frac{ 2.303 RT }{F}\) \(=0.059 V\) at\( T 298 K \)] 

Use of an artificial kidney during hemodialysis may result in:
(a) Nitrogenous waste build-up in the body (
b) Non-elimination of excess potassium ions 
(c) Reduced absorption of calcium ions from gastro-intestinal tract 
(d) Reduced RBC production 
Which of the following options is the most appropriate?

Which of the following can be used as a biocontrol agent in the treatment of plant disease?:

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?