Question 1: Palette 1/25

JEE Advanced 2026 MSQ

The correct statement(s) regarding the periodic properties of elements is(are) :

A

Second ionization enthalpy of carbon atom is less than that of boron atom.

B

Increasing order of ionic radii: Al³⁺ < Mg²⁺ < Na⁺

C

Under identical conditions, in solid state, the density of potassium metal is more than density of sodium metal.

D

The H–H bond is weaker than F–F bond.

Question 2: Palette 2/25

JEE Advanced 2002 MCQ

Identify the correct order of acidic strengths of CO₂, CuO, CaO, H₂O

A

CaO < CuO < H₂O < CO₂

B

H₂O < CuO < CaO < CO₂

C

CaO < H₂O < CuO < CO₂

D

H₂O < CO₂ < CaO < CuO

Question 3: Palette 3/25

JEE Advanced 2002 MCQ

Identify the least stable ion amongst the following

A

Li^-

B

Be^-

C

B^-

D

C^-

Question 4: Palette 4/25

JEE Advanced 2000 MCQ

Read the following statement and explanation and answer as per the options given below

ASSERTION : The first ionization energy of Be is greater than that of B.

REASON : 2p orbital is lower in energy than 2s.

A

If both assertion and reason are CORRECT, and reason is the CORRECT explanation of the assertion

B

If both assertion and reason are CORRECT, and reason is not the CORRECT explanation of the assertion

C

If assertion is CORRECT, but reason is INCORRECT

D

If assertion is INCORRECT, but reason is CORRECT

Question 5: Palette 5/25

JEE Advanced 2000 MCQ

The correct order of radii is

A

N < Be < B

B

F^- < O^2- < N^3-

C

Na < Li < K

D

Fe³⁺ < Fe²⁺ < Fe⁴⁺

Question 6: Palette 6/25

JEE Advanced 2000 MCQ

The correct order of acidic strength is

A

Cl₂O₇ > SO₂ > P₄O₁₀

B

CO₂ > N₂O₅ > SO₃

C

Na₂O > MgO > Al₂O₃

D

K₂O > CaO > MgO

Question 7: Palette 7/25

JEE Advanced 2000 MCQ

Amongst H₂O, H₂S, H₂Se and H₂Te, the one with the highest boiling point is

A

H₂O because of hydrogen bonding

B

H₂Te because of higher molecular weight

C

H₂S because of hydrogen bonding

D

H₂Se because of lower molecular weight

Question 8: Palette 8/25

JEE Advanced 1999 MCQ

Ionic radii of

A

Ti⁴⁺ < Mn⁷⁺

B

³⁵Cl^- < ³⁷Cl^-

C

K⁺ > Cl^-

D

P³⁺ > P⁵⁺

Question 9: Palette 9/25

JEE Advanced 1996 MCQ

Which of the following has the maximum number of unpaired electrons?

A

Mg²⁺

B

Ti³⁺

C

V³⁺

D

Fe²⁺

Question 10: Palette 10/25

JEE Advanced 1995 MCQ

Which has most stable +2 oxidation state?

A

Sn

B

Pb

C

Fe

D

Ag

Question 11: Palette 11/25

JEE Advanced 1993 MCQ

The decreasing order of electron affinity of F, Cl, Br is F > Cl > Br

A

TRUE

B

FALSE

Question 12: Palette 12/25

JEE Advanced 1993 MCQ

The basic nature of the hydroxides of group 13 (Gr. III B) decreases progressively down the group.

A

TRUE

B

FALSE

Question 13: Palette 13/25

JEE Advanced 1992 MCQ

The statement that is not correct for the periodic classification of element is

A

The properties of elements are the periodic functions of their atomic numbers

B

Non-metallic elements are lesser in number than metallic elements

C

The first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number

D

For transition elements the d-subshells are filled with electrons monotonically with increase in atomic number.

Question 14: Palette 14/25

JEE Advanced 1990 MCQ

Amongst the following elements (whose electronic configuration are given below), the one having the highest ionization energy is:

A

[Ne] 3s²3p¹

B

[Ne] 3s²3p³

C

[Ne] 3s²3p²

D

[Ne] 3d¹⁰4s²4p³

Question 15: Palette 15/25

JEE Advanced 1989 MCQ

Which one of the following is the smallest in size?

A

N^3-

B

O^2-

C

F^-

D

Na⁺

Question 16: Palette 16/25

JEE Advanced 1989 MCQ

Which one of the following is the strongest base?

A

AsH₃

B

NH₃

C

PH₃

D

SbH₃

Question 17: Palette 17/25

JEE Advanced 1989 MSQ

Sodium sulphate is soluble in water whereas barium sulphate is sparingly soluble because

A

the hydration energy of sodium sulphate is more than its lattice energy

B

the lattice energy of barium sulphate is more than its hydration energy

C

the lattice energy has no role to play in solubility

D

the hydration energy of sodium sulphate is less than its lattice energy

Question 18: Palette 18/25

JEE Advanced 1988 MCQ

The first ionisation potential of Na, Mg, Al and Si are in the order

A

Na < Mg > Al < Si

B

Na > Mg > Al > Si

C

Na < Mg < Al < Si

D

Na > Mg > Al < Si

Question 19: Palette 19/25

JEE Advanced 1988 MSQ

The statements that are true for the long form of the periodic table are:

A

it reflects the sequence of filling the electrons in the order of sub-energy level s, p, d and f

B

it helps to predict the stable valency states of the elements

C

it reflects trends in physical and chemical properties of the elements

D

it helps to predict the relative ionicity of the bond between any two elements

Question 20: Palette 20/25

JEE Advanced 1987 MCQ

The first ionisation potential in electron volts of nitrogen and oxygen atoms are respectively given by

A

14.6, 13.6

B

13.6, 14.6

C

13.6, 13.6

D

14.6, 14.6

Question 21: Palette 21/25

JEE Advanced 1987 MCQ

Atomic radii of fluorine and neon in Angstrom units are respectively given by

A

0.72, 1.60

B

1.60, 1.60

C

0.72, 0.72

D

None of these values

Question 22: Palette 22/25

JEE Advanced 1987 MCQ

The electronegativity of the following elements increases in the order

A

C, N, Si, P

B

N, Si, C, P

C

Si, P, C, N

D

P, Si, N, C

Question 23: Palette 23/25

JEE Advanced 1987 MCQ

In group IA, of alkali metals, the ionisation potential decreases on moving down the group. Therefore, lithium is a strongest reducing agent

A

TRUE

B

FALSE

Question 24: Palette 24/25

JEE Advanced 1982 MCQ

The element with the highest first ionization potential is

A

boron

B

carbon

C

nitrogen

D

oxygen

Question 25: Palette 25/25

JEE Advanced 1981 MCQ

The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is

A

C > N > O > F

B

O > N > F > C

C

O > F > N > C

D

F > O > N > C