AIEEE 2006 | Periodic Table & Periodicity Question 116 | Chemistry

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?

The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group

In both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group

Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens

In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group

AIEEE 2006

MCQ (Single Correct Answer)

-1

The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is :

F < S < P < B

P < S < B < F

B < P < S < F

B < S < P < F

AIEEE 2005

MCQ (Single Correct Answer)

-1

Which of the following oxides is amphoteric in character?

CaO

CO₂

SiO₂

SnO₂

AIEEE 2005

MCQ (Single Correct Answer)

-1

In which of the following arrangements the order is NOT according to the property indicated against it?

Li < Na < K < Rb Increasing metallic radius

I < Br < F < Cl Increasing electron gain enthalpy (with negative sign)

B < C < N < O Increasing first ionization enthalpy

Al³⁺ < Mg²⁺ < Na⁺ < F^- Increasing ionic size

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