NEET Chemistry Questions

If for a gas \( \frac{R}{C_v} = 0.67 \), this gas is made up of molecules which are

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

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)

Which of the following statements (s) is/are true? “Internal energy of an ideal gas — ”

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,

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

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

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

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

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

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

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

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?

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

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

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

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.

How many atoms are there in 4.25 g of NH₃?

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

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

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

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⁻Bromopropan^{-2}-ol

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

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

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

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

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

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

Two electrons present in M shell will differ in

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

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.

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?

Read the following statements and mark the incorrect statement.

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.

What will be the half-life of the first order reaction for which the value of rate constant is 200 s⁻¹?

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

Identify the compound Y in the following reaction.

According to Arrhenius equation rate constant k is equal to A e⁻ᴱᵃ/ᴿᵀ. Which of the following options represents the graph of ln k vs 1/T?

The structure of product X in the following reaction is

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

Meitnerium is the IUPAC official name of an element with atomic number

Electronic configurations of four elements A, B, C and D are given below: (A) 1s²2s²2p⁶ (B) 1s²2s²2p⁴ (C) 1s²2s²2p⁶3s¹ (D) 1s²2s²2p⁵ Which of the following is the correct order of increasing tendency to gain electron?

Assertion : Na₂O is a basic oxide, whereas Cl₂O₇ is an acidic oxide. Reason: Elements on extreme left form basic oxides whereas elements on extreme right form acidic oxides.

Which of the following complexes formed by Cu²⁺ ions is most stable?

Beryllium has higher ionisation enthalpy than boron. This can be explained as,

Aldehydes that do not undergo aldol condensation are

Match the column I with column II and mark the appropriate choice

Rate law for the reaction A + 2B ⟶ C is found to be : Rate = k[A][B] Concentration of reactant ‘B’ is doubled, keeping the concentration of ‘A’ constant, the value of rate constant will be..........