Match the following : Oxide Nature (a) CO (i) Basic (b) BaO (ii) Neutral (c) Al 2 O 3 (iii) Acidic (d) Cl 2 O 7 (iv) Amphoteric Which of the following is correct option?

(a)-(ii); (b)-(i); (c)-(iv); (d)-(iii)

(a)-(iii); (b)-(iv); (c)-(i); (d)-(ii)

(a)-(iv); (b)-(iii); (c)-(ii); (d)-(i)

(a)-(i); (b)-(ii); (c)-(iii); (d)-(iv)

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An element $X$ occurs in short period having configuration ${n s}^{2} {n p}^{1}$ . The formula and nature of its oxide is:-

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Important Questions on Classification of Elements and Periodicity in Properties

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Be

and

Al

show similarities in properties due to the diagonal relationship except in the property

X

given below. What is

X

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Which among the following oxides is the most basic?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Identify the correct statement from the following.

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The set of elements that differ in mutual relationship from those of the other sets is:

HARD

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

B

has a smaller first ionization enthalpy than

B e

. Consider the following statement:
(I) it is easier to remove

2 p

electron than

2 s

electron
(II)

2 p

electron of

B

is more shielded from the nucleus by the inner core of electrons than the

2 s

electrons of

B e

(III)

2 s

electron has more penetration power than

2 p

electron
(IV) atomic radius of

B

is more than

B e

(atomic number

B : 5, B e = 4

)
The correct statements are.

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The first ionization energy of magnesium is smaller, as compared to that of elements

X

and

Y

, but higher than that of

Z

. The elements

X, Y

and

Z

, respectively, are :

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Which of the following pairs exhibit a diagonal relationship?

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The neutral oxide among the following is

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Three elements

X, Y

and

Z

are in the

3^{rd}

period of the periodic table. The oxides of

X, Y

and

Z

, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of

X, Y

and

Z

is:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The characteristics of elements

X, Y

and

Z

with atomic numbers, respectively,

33, 53

and

83

are:

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

In the following sets of reactants which two sets best exhibit the amphoteric character of Al₂O₃ . xH₂O ?

\begin{matrix} Set I & {Al}_{2} O_{3} \cdot {xH}_{2} O_{(s)} + {OH}_{(aq)}^{-} \\ Set II & {Al}_{2} O_{3} x \cdot H_{2} O_{(s)} + H_{2} O_{(l)} \\ Set III & {Al}_{2} O_{3} x \cdot H_{2} O_{(s)} + H_{(aq)}^{+} \\ Set IV & {Al}_{2} O_{3} \cdot {xH}_{2} O_{(s)} + {NH}_{3 (aq)} \end{matrix}

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

How many of the following statements is/are correct?
a) Mercury is the only metal that exists as liquid at room temperature.
b) Among non-metals, carbon has the highest melting point.
c) Hydrogen is the most abundant element in the universe.
d) Oxygen is the most abundant element in the earth's crust.

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Which of the following has highest hydration energy?

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The general formula of the compounds formed when group