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1
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The incorrect postulates of the Dalton's atomic theory are :

(A) Atoms of different elements differ in mass.

(B) Matter consists of divisible atoms.

(C) Compounds are formed when atoms of different element combine in a fixed ratio.

(D) All the atoms of given element have different properties including mass.

(E) Chemical reactions involve reorganisation of atoms.

Choose the correct answer from the options given below :

A
(B), (D) only
B
(A), (B), (D) only
C
(B), (D), (E) only
D
(C), (D), (E) only
2
JEE Main 2024 (Online) 4th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Choose the Incorrect Statement about Dalton's Atomic Theory

A
Compounds are formed when atoms of different elements combine in any ratio.
B
Matter consists of indivisible atoms.
C
chemical reactions involve reorganization of atoms
D
All the atoms of a given element have identical properties including identical mass.
3
JEE Main 2024 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The number of radial node/s for $3 p$ orbital is :
A
3
B
2
C
1
D
4
4
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In case of isoelectronic species the size of $\mathrm{F}^{-}, \mathrm{Ne}$ and $\mathrm{Na}^{+}$is affected by :
A
Nuclear charge $(\mathrm{z})$
B
None of the factors because their size is the same
C
Electron-electron interaction in the outer orbitals
D
Principal quantum number (n)
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