1
JEE Main 2021 (Online) 17th March Morning Shift
+4
-1
A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :
A
trigonal pyramidal
B
T-shaped
C
see-saw
D
planar triangular
2
JEE Main 2021 (Online) 16th March Morning Shift
+4
-1
Given below are two statements : one is labeled as Assertion A and the other is labelled as Reason R :

Assertion A : The H$$-$$O$$-$$H bond angle in water molecule is 104.5$$^\circ$$.

Reason R : The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.

In the light of the above statements, choose the correct answer from the options given below :
A
Both A and R are true, and R is the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true, but R is not the correct explanation of A
3
JEE Main 2021 (Online) 26th February Evening Shift
+4
-1
Match List - I with List - II.

List - I (Molecule) List - II (Bond order)
(a) $$N{e_2}$$ (i) 1
(b) $${N_2}$$ (ii) 2
(c) $${F_2}$$ (iii) 0
(d) $${O_2}$$ (iv) 3

Choose the correct answer from the options given below :
A
(a) $$\to$$ (i), (b) $$\to$$ (ii), (c) $$\to$$ (iii), (d) $$\to$$ (iv)
B
(a) $$\to$$ (iv), (b) $$\to$$ (iii), (c) $$\to$$ (ii), (d) $$\to$$ (i)
C
(a) $$\to$$ (iii), (b) $$\to$$ (iv), (c) $$\to$$ (i), (d) $$\to$$ (ii)
D
(a) $$\to$$ (ii), (b) $$\to$$ (i), (c) $$\to$$ (iv), (d) $$\to$$ (iii)
4
JEE Main 2021 (Online) 26th February Morning Shift
+4
-1
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.

Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Both A and R are true and R is the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true but R is NOT the correct explanation of A
JEE Main Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Coordinate Geometry
Calculus
EXAM MAP
Joint Entrance Examination
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Medical
NEET