NEET-UG 2023 · Code E1

Match List - I with List - II : List - I

1. ACoke
2. BDiamond
3. CFullerene
4. DGraphite List - II I. Carbon atoms are sp³ hybridised. II. Used as a dry lubricant III. Used as a reducing agent IV. Cage like molecules Choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic. Reasons R : The deep blue solution is due to the formation of amide. In the light of the above statements, choose the correct answer from the options given below :

1. ABoth A and R are true and R is the correct explanation of A.
2. BBoth A and R are true but R is NOT the correct explanation of A.
3. CA is true but R is false.
4. DA is false but R is true.

In Lassaigne’s extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe³⁺ due to the formation of -

1. AFe₄[Fe(CN)₆]₃ · x H₂O
2. BNaSCN
3. C[Fe(CN)₅ NOS]⁴⁻
4. D[Fe(SCN)]²⁺

The conductivity of centimolar solution of KCl at 25°C is 0.0210 ohm⁻¹ cm⁻¹ and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of cell constant is -

1. A1.34 cm⁻¹
2. B3.28 cm⁻¹
3. C1.26 cm⁻¹
4. D3.34 cm⁻¹

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : A reaction can have zero activation energy. Reasons R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy. In the light of the above statements, choose the correct answer from the options given below :

1. ABoth A and R are true and R is the correct explanation of A.
2. BBoth A and R are true and R is NOT the correct explanation of A.
3. CA is true but R is false.
4. DA is false but R is true.

Which one is an example of heterogenous catalysis?

1. AOxidation of sulphur dioxide into sulphur trioxide in the presence of oxides of nitrogen.
2. BHydrolysis of sugar catalysed by H⁺ ions.
3. CDecomposition of ozone in presence of nitrogen monoxide.
4. DCombination between dinitrogen and dihydrogen to form ammonia in the presence of finely divided iron.

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Helium is used to dilute oxygen in diving apparatus. Reasons R : Helium has high solubility in O₂. In the light of the above statements, choose the correct answer from the options given below :

1. ABoth A and R are true and R is the correct explanation of A.
2. BBoth A and R are true and R is NOT the correct explanation of A.
3. CA is true but R is false.
4. DA is false but R is true.

A compound is formed by two elements A and B. The element B forms cubic close packed structure and atoms of A occupy 1/3 of tetrahedral voids. If the formula of the compound is AₓBᵧ, then the value of x + y is in option

1. A5
2. B4
3. C3
4. D2