List of top Questions asked in NEET (UG)

Given below are some statements about plant growth regulators.
A. All Gas are acidic in nature.
B. Auxins are antagonists to Gas.
C. Zeatin was isolated from coconut milk.
D. Ethylene induces flowering in Mango.
E. Abscisic acid induces parthenocarpy.
Choose the correct set of statements from the option given below:

F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxins was supplied with one of the following except :

Ligases is a class of enzymes responsible for catalysing the linking together of two compounds.Which of the following bonds is not catalysed by it?

Given below are two statements:
Statement I: In eukaryotes there are three RNA polymerases in the nucleus in addition to the RNA polymerase found in the organelles.
Statement II: All the three RNA polymerases in eukaryotic nucleus have different roles.
In the light of the above statements, choose the correct answer from the options given below:

Which of the following are correct about cellular respiration?
A. Cellular respiration is the breaking of C-C bonds of complex organic molecules by oxidation.
B. The entire cellular respiration takes place in Mitochondria.
C. Fermentation takes place under anaerobic condition in germinating seeds.
D. The fate of pyruvate formed during glycolysis depends on the type of organism also.
E. Water is formed during respiration as a result of O2 accepting electrons and getting reduced
Choose the correct answer from the options given below:

Which of the following is the correct match?

\([ \text{Mn}_2(\text{CO})_{10} ]\) and \([ \text{Co}_2(\text{CO})_8 ]\) structures have:A. Metal-Metal linkage
B. Terminal CO groups
C. Bridging CO groups
D. Metal in zero oxidation stateChoose the correct answer from the options given below:

Mass of glucose (\(C_6H_{12}O_6\)) required to be dissolved to prepare one litre of its solution which is isotonic with \(15 \, \text{g L}^{-1}\) solution of urea (\(NH_2CONH_2\)) is:
{Given:} Molar mass in \(\text{g mol}^{-1}\): \[ C : 12, \, H : 1, \, O : 16, \, N : 14 \]

Rate constants of a reaction at 500 K and 700 K are \(0.04 \, \text{s}^{-1}\) and \(0.14 \, \text{s}^{-1}\), respectively. Then, the activation energy of the reaction is:
{Given:} \[ \log 3.5 = 0.5441, \, R = 8.31 \, \text{J K}^{-1} \, \text{mol}^{-1} \]

The alkane that can be oxidized to the corresponding alcohol by KMnO₄ as per the equation

is, when:

On complete combustion, 0.3 g of an organic compound gave 0.2 g of CO₂ and 0.1 g of H₂O. The percentage composition of carbon and hydrogen in the compound, respectively, is:

Match List-I with List-II :

List - ISolid salt treated with dil. H2SO4	List - IIAnion detected
(A) effervescence of colourless gas	(I) NO2−
(B) gas with smell of rotten egg	(II) CO32−
(C) gas with pungent smell	(III) S2−
(D) brown fumes	(IV) SO23−

Identify the correct answer from the options given below :

Match List-I with List-II :  

List - IMolecule	List - IIBond enthalpy (kJ mol-1)
(A) HCl	(I) 435.8
(B) N2	(II) 498
(C) H2	(III) 946.0
(D) O2	(IV) 431.0

Identify the correct answer from the options given below :

Identify D in the following sequence of reactions:

A steam volatile organic compound which is immiscible with water has a boiling point of 250°C. During steam distillation, a mixture of this organic compound and water will boil:

The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is :

The quantum numbers of four electrons are given below:
I. \( n = 4; l = 2; m_l = -2; s = -\frac{1}{2} \)
II. \( n = 3; l = 2; m_l = 1; s = +\frac{1}{2} \)
III. \( n = 4; l = 1; m_l = 0; s = +\frac{1}{2} \)
IV. \( n = 3; l = 1; m_l = -1; s = +\frac{1}{2} \)
The correct decreasing order of energy of these electrons is:

Which of the following is not an ambidentate ligand?

For the reaction in equilibrium:
N₂(g) + 3H₂(g) ⇌ 2NH₃(g), ΔH = -Q
Reaction is favoured in forward direction by:

Arrange the following compounds in increasing order of their solubilities in chloroform:
NaCl, CH₃OH, cyclohexane, CH₃CN

Given below are two statements:
Statement I: Propene on treatment with diborane gives an addition product with the formula \(((\text{CH}_3)_2 - \text{CH}_3\text{B})\).
Statement II: Oxidation of \(((\text{CH}_3)_2 - \text{CH}_3\text{B})\) with hydrogen peroxide in presence of NaOH gives propan-2-ol.
In the light of the above statements, choose the most appropriate answer from the options given below:

According to the law of equipartition of energy, the number of vibrational modes of a polyatomic gas of constant \(\gamma = \frac{C_P}{C_V}\) is (\(C_P\) where \(C_V\) are the specific heat capacities of the gas at constant pressure and constant volume, respectively):

Select the correct statements among the following:
A. Slow neutrons can cause fission in \( \frac{235}{92}U \) more effectively than fast neutrons.
B. \( \alpha \)-rays are Helium nuclei.
C. \( \beta \)-rays are fast moving electrons or positrons.
D. \( \gamma \)-rays are electromagnetic radiations with wavelengths larger than X-rays.
Choose the answer from the options given below:

The displacement of a travelling wave \( y = C \sin \left( \frac{2\pi}{\lambda} (at - x) \right) \), where \( t \) is time, \( x \) is distance and \( \lambda \) is the wavelength, all in S.I. units. Then the frequency of