1
JEE Main 2024 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II.

List I
Species
List II
Electronic distribution
(A) $$\mathrm{Cr^{+2}}$$ (I) $$\mathrm{3d^8}$$
(B) $$\mathrm{Mn^+}$$ (II) $$\mathrm{3d^34s^1}$$
(C) $$\mathrm{Ni^{+2}}$$ (III) $$\mathrm{3d^4}$$
(D) $$\mathrm{V^+}$$ (IV) $$\mathrm{3d^54s^1}$$

Choose the correct answer from the options given below :

A
(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
B
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
C
(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
D
(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
2
JEE Main 2024 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The Lassiagne's extract is boiled with dil $$\mathrm{HNO}_3$$ before testing for halogens because,

A
Silver halides are soluble in $$\mathrm{HNO}_3$$.
B
$$\mathrm{AgCN}$$ is soluble in $$\mathrm{HNO}_3$$.
C
$$\mathrm{Na}_2 \mathrm{S}$$ and $$\mathrm{NaCN}$$ are decomposed by $$\mathrm{HNO}_3$$.
D
$$\mathrm{Ag}_2 \mathrm{S}$$ is soluble in $$\mathrm{HNO}_3$$.
3
JEE Main 2024 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement (I) : The orbitals having same energy are called as degenerate orbitals.

Statement (II) : In hydrogen atom, 3p and 3d orbitals are not degenerate orbitals.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Statement I is true but Statement II is false
B
Statement I is false but Statement II is true
C
Both Statement I and Statement II are false
D
Both Statement I and Statement II are true
4
JEE Main 2024 (Online) 30th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Sugar which does not give reddish brown precipitate with Fehling's reagent, is :

A
Glucose
B
Sucrose
C
Lactose
D
Maltose
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