List of top Questions asked in NEET (UG)

Statement I: The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions
Statement II: The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding.
In the light of the above statements choose the most appropriate answer from the options given below:
At 298 K, the standard electrode potentials of Cu2+/Cu, Zn2+/Zn, Fe2+/Fe and Ag+/Ag are 0.34 V, - 0.76 V, - 0.44 V and 0.80 V, respectively.
On the basis of standard electrode potential, predict which of the following reaction cannot occur?
Statement I: The boiling points of the following hydrides of group 16 elements increases in the order - H2O < H2S < H2Se < H2Te
Statement II: The boiling points of these hydrides increases with increase in molar mass.
In the light of the above statements, choose the most appropriate answer from the options given below:
The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is
[Given pKa of CH3COOH = 4.57]

Statement I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order - Al3+ > Ba2+ > Na+
Statement II: In the coagulation of a positive sol, the flocculating power of the three given salts is in the order - NaCl > Na2SO4 > Na3PO4
Choose the most appropriate answer from the options given below:

Given below are two statements:
Statement I: In Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. HCl +ZnCl2, knowns as Lucas Reagent.
Statement II: Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas Reagent.
In the light of the above statements, choose the most appropriate answer from the options given below:
Identify the incorrect statement from the following.

Match List - I with List- II.

 List-I (Drug class) List-II (Drug molecule)
(a)Antacids(i)Salvarsan
(b)Antihistamines(ii)Morphine
(c)Analgesics(iii)Cimetidine
(d)Antimicrobials(iv)Seldane
The given graph is a representation of kinetics of a reaction.
The y and x axes for zero and first order reactions, respectively are

Match List-I with List-II.

 List - I (Ores) List - II (Composition)
(a)Haematite(i)Fe3O3
(b)Magnetite(ii)ZnCO3
(c)Calamine(iii)Fe2O3
(d)Kaolinite(iv)[Al2(OH)4Si2O5]

Choose the correct answer from the options given below:

What mass of 95% pure \(CaCO_3\) will be required to neutralise 50 mL of 0.5 M \(HCl\) solution according to the following reaction?
\(CaCO_3(s) + 2HCl(aq) → CaCl_2(aq) + CO_2(g) + 2H_2O(l)\)
[Calculate upto second place of decimal point]
The product formed from the following reaction sequence is
The correct IUPAC name of the following compound is
Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?
Identify the incorrect statement from the following
Which of the following statement is not correct about diborane?
Which of the following sequence of reactions is suitable to synthesize chlorobenzene?
Which compound amongst the following is not an aromatic compound?
Amongst the following which one will have maximum 'lone pair- lone pair' electron repulsions?

Copper crystallises in fcc unit cell with cell edge length of 3.608 x 10-8 cm. The density of copper is 8.92 g cm-3. Calculate the atomic mass of copper

The IUPAC name of the complex [Ag(H2O)2][Ag(CN)2] is:
A 10.0 L flask contains 64 g of oxygen at 27°C. (Assume O2 gas is behaving ideally). The pressure inside the flask in bar is (Given R = 0.0831 L bar K-1 mol-1)

Match List - I with List- II. Choose the correct answer from the options given below:

 List - I (Hydrides) List - II (Nature)
(a)MgH2(i)Electron precise
(b)GrH4(ii)Electron deficient
(c)B2H6(iii)Electron rich
(d)HF(iv)Ionic
\(RMgX + CO_2 (\text{dry})→(\text{ether}) Y (H_3O^+)→ RCOOH\)
What is Y in the above reaction?
If radius of second Bohr orbit of the He+ ion is 105.8pm, What is the radius of third Bohr Orbit of Li2+ ion?