NEET Chemistry Questions

Taking the Bohr radius as a₀ = 53 pm, the radius of Li⁺⁺ ion in its ground state, on the basis of Bohr’s model, will be about

Correct representation of 3-methylpent-3-en-2-ol is

What is the ratio of the shortest wavelength of the Balmer series to the shortest wavelength of the Lyman series?

Match the column I with column II and mark the appropriate choice. Column-I: (A) CH₃CH₂OH, H₃C-O-CH₃ (B) C₂H₅COC₂H₅, C₃H₇COCH₃ (C) Keto-enol tautomers (D) CH₃CH₂CH₂OH, (CH₃)₂CHOH Column-II: (i) Position isomers (ii) Tautomers (iii) Functional isomers (iv) Metamers

Which of the following intermediates contains three pairs of electrons in its valence shell?

Which of the following sets of groups contain only electrophiles?

Inductive effect involves

Which of the following diagrams (figure) depicts ideal gas behaviour?

Choose the correct option from the following options given below:

(1) In the ground state of Rutherford's model electrons are in stable equilibrium. While in Thomson's model electrons always experience a net-force.

(2) An atom has a nearly continuous mass distribution in a Rutherford's model but has a highly non-uniform mass distribution in Thomson's model.

(3) A classical atom based on Rutherford's model is doomed to collapse.

(4) The positively charged part of the atom possesses most of the mass in Rutherford's model but not in Thomson's model.

The diameter of an oxygen molecule is 3Å. The ratio of molecular volume to the actual volume occupied by the oxygen gas at STP is (Approximately)

Hydrogen atom from excited state comes to the ground by emitting a photon of wavelength $\lambda$. The value of principal quantum number 'n' of the excited state will be : (R : Rydberg constant)

Four forces are acting at a point P in equilibrium as shown in figure. The ratio of force F₁ to F₂ is 1 : x where x = _____.

The angular momentum of an electron moving in an orbit of hydrogen atom is 1.5 ℏ/π. The energy in the same orbit is nearly.

In the reaction, 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g) when 1 mole of ammonia and 1 mole of oxygen are made to react to completion,

Which of the following aqueous solutions should have the highest boiling point?

For the cell reaction : 2Cu⁺(aq) → Cu(s) + Cu²⁺(aq), the standard cell potential is 0.36 V. The equilibrium constant for the reaction is

The relative number of atoms of elements, 'X' and 'Y' in a compound is 0.25 and 0.5. The empirical formula of compound is

What will be the weight of CO having the same number of oxygen atoms as present in 22 g of CO₂?

Which of the following elements do not belong to the family indicated?

Two elements 'P' and 'Q' combine to form a compound. Atomic mass of 'P' is 12 and 'Q' is 16. Percentage of 'P' in the compound is 27.3. What will be the empirical formula of the compound?

Which of the following statements is correct? (1) In the electrophilic substitution of toluene with Br₂, iron (III) bromide acts as a Lewis acid. (2) In the reaction of toluene with Cl₂/FeCl₃, ortho and para isomers are easily separated. (3) Similar reaction with iodine is reversible in nature. (4) All of these

Rearrange the following (I to IV) in the order of increasing masses. (Atomic mass : N = 14, O = 16, Cu = 63)

Calculate molarity of 63% w/w HNO₃ solution if density is 1.4 g/mL.

Assertion : One mole of NaCl contains 6.023 × 10²³ molecules of sodium chloride. Reason : 58.5 g of NaCl also contains 6.023 × 10²³ molecules of NaCl.

Molecules whose mirror image is nonsuperimposable over them are known as chiral. Which of the following molecules is chiral in nature? (1)²⁻Bromobutane (2)¹⁻Bromobutane (3)²⁻Bromopropane (4)²⁻Bromopropa$n^{-2}$-ol

2.82 g of glucose is dissolved in 30 g of water. The mole fraction of glucose in the solution is

The molar concentration of Cl⁻ ions in a solution obtained by mixing 300 mL of 0.3 M NaCl and 200 mL of 0.4 M BaCl₂ is

Given below are half-cell reactions: MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O; E° = +1.510 V 1/2 Ω₂ + 2H⁺ + 2e⁻ → H₂O₂; E° = +1.223 V Will the permanganate ion, MnO₄⁻ liberate O₂ from water in the presence of an acid?

How many atoms are there in 4.25 g of NH₃?

Which of the following quantum numbers are correct for the outermost electron of sodium atom?

The period number in the long form of the periodic table is equal to:

An organic compound contains C = 40%, H = 13.33% and N = 46.67%. Its empirical formula is

Using the data given below find out the strongest reducing agent. E° Cr₂O₇²⁻/Cr³⁺ = 1.33V E° Cl₂/Cl⁻ = 1.36V E° MnO₄⁻/Mn²⁺ = 1.51V E° Cr³⁺/Cr = -0.74V

Arrange the following in increasing order of covalent character: NaCl, MgCl₂, AlCl₃.

The reaction, 2X → Y + Z would be zero order reaction when

How many nodal planes are there in the atomic orbitals for the principal quantum number n = 3?

The quantity of charge required to obtain one mole of aluminium from Al₂O₃ is ......

The increasing order of the atomic radii of the following elements is: (A) C (B) O (C) F (D) Cl (E) Br

For the electrons of oxygen atom, which of the following statements is correct?

Which is the correct increasing order of boiling points of the following compounds?¹⁻iodobutane,¹⁻bromobutane,¹⁻chlorobutane, Butane

Two electrons present in M shell will differ in

Mark the correct order of decreasing acid strength of the following compounds.

Assertion: One mole of NaCl contains 6.023 × 10²³ molecules of sodium chloride. Reason: 58.5 g of NaCl also contains 6.023 × 10²³ molecules of NaCl.

A certain orbital has no angular nodes and two radial nodes. The orbital is

An aqueous solution of 2% non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molecular mass of the solute?

Which of the following statements regarding the variation of atomic radii in the periodic table is not true? (1) In a group, there is continuous increase in size with increase in atomic number. (2) In 4f-series, there is a continuous decrease in size with increase in atomic number. (3) The size of inert gases is larger than halogens. (4) In $3^{rd}$ period, the size of atoms increases with increase in atomic number.

Among the following oxides, the one which is most basic is

The structure of product X in the following reaction is

Assertion: Phenol forms 2, 4,⁶⁻tribromophenol on treatment with Br₂-water at 273 K. Reason: Phenol is o,p-directing group.

Read the following statements and mark the incorrect statement.