JEE Main 2023 · 11 Apr 2023 Shift 1

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : In the photoelectric effect, the electrons are ejected from the metal surface as soon as the beam of light of frequency greater than threshold frequency strikes the surface. Reason R : When the photon of any energy strikes an electron in the atom, transfer of energy from the photon to the electron takes place. In the light of the above statements, choose the most appropriate answer from the options given below :

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

25 mL of silver nitrate solution (1M) is added dropwise to 25 mL of potassium iodide (1.05 M) solution. The ion(s) present in very small quantity in the solution is/are

1. AI⁻ only
2. BAg⁺ and I⁻ both
3. CK⁺ only
4. DNO₃⁻ only

For elements B, C, N, Li, Be, O and F, the correct order of first ionization enthalpy is

1. ALi < Be < B < C < N < O < F
2. BLi < B < Be < C < O < N < F
3. CB > Li > Be > C > N > O > F
4. DLi < Be < B < C < O < N < F

In the extraction process of copper, the product obtained after carrying out the reactions

1. (i)
   2Cu₂S + 3O₂ → 2Cu₂O + 2SO₂
2. (ii)
   2Cu₂O + Cu₂S → 6Cu + SO₂ is called

Given below are two statements: Statement-I : Methane and steam passed over a heated Ni catalyst produces hydrogen gas. Statement-II : Sodium nitrite reacts with NH₄Cl to give H₂O, N₂ and NaCl. In the light of the above statements, choose the most appropriate answer from the options given below :

1. ABoth the statements I and II are correct
2. BBoth the statements I and II are incorrect
3. CStatement I is correct but Statement II is incorrect
4. DStatement I is incorrect but Statement II is correct

For compound having the formula GaAlCl₄, the correct option from the following is

1. AOxidation state of Ga in the salt GaAlCl₄ is +3.
2. BGa is coordinated with Cl in GaAlCl₄
3. CGa is more electronegative than Al and is present as a cationic part of the salt GaAlCl₄
4. DCl forms bond with both Al and Ga in GaAlCl₄

Which of the following complex has a possibility to exist as meridional isomer?

1. A[Co(NH₃)₃(NO₂)₃]
2. B[Co(en)₃]
3. C[Co(en)₂Cl₂]
4. D[Pt(NH₃)₂Cl₂]

The set which does not have ambidentate ligand(s) is

1. AEDTA⁴⁻, NCS⁻, C₂O₄²⁻
2. BNO₂⁻, C₂O₄²⁻, EDTA⁴⁻
3. CC₂O₄²⁻, ethylene diamine, H₂O
4. DC₂O₄²⁻, NO₂⁻, NCS⁻