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Standard XII

Chemistry

S Block Elements

The following...

Question

The following are some statements about diagonal relationship.
i) It is due to nearly same size, electronegativity and same polarising power
ii) $L i$ has similar properties with $H_{2}$
iii) $B e O$ , $A l_{2} O$ are amphoteric in nature
iv) All $d$ -block elements are stable

Only (i) correct

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Only (ii) correct

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Only (iii) correct

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Only (iv) is correct

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Solution

The correct option is A Only (i) correct
Such relationship occurs because crossing and descending the periodic table have opposite effects.We have many like silicon and boron and so on.

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Similar questions

Which of the following are the correct characteristics of isotopes of an element?

(i) same atomic mass (ii) same atomic number

(iii) same physical properties (iv) same chemical properties

(a) (i), (ii) and (iv) (b) (ii), (iii) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

Question 16
Which of the following are the characteristics of isotopes of an element?

(i) Isotopes of an element have same atomic masses
(ii) Isotopes of an element have same atomic number
(iii) Isotopes of an element show same physical properties
(iv) Isotopes of an element show same chemical properties

(a) (i), (iii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Q. Statement I: Physical properties of isotopes of an element are similar.
Statement II: Isotopes have the same number of nucleons.
Statement III: Chemical properties of C-12 and C-14 will be similar.

Which of the given statements is/are correct?

B e

and

A l

exhibit a diagonal relationship. Which of the following statements about them is/are not true?
(i) Both react with HCI to liberate

H_{2}

.
(ii) They are made passive by

H N O_{3}

.
(iii) Their carbides give acetylene on treatment with water.
(iv) Their oxides are amphoteric.

Parts (a) to (e) refer to changes in the properties of elements on moving from left to right across a period of Periodic Table. For each property, choose the correct answer.

(a) The non-metallic character of the elements :

(i) decreases, (ii) increases,

(iii) remains the same, (iv) depends on the period

(b) The electronegativity :

(i) depends on the number of valence electrons,

(ii) remains the same,

(iii) decreases,

(iv) increases.

(i) goes up and down (ii) decreases

(iii) increases (iv) remains the same

(d) The atomic size :

(i) decreases,

(ii) increases,

(iii) remains the same ,

(iv) sometimes increases and sometimes decreases.

(e) The electron affinity of the elements in groups 1 to 7 :

(i) goes up and then down.

(ii) decreases and then increases,

(iii) increases,

(iv) decreases.

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The following are some statements about diagonal relationship.i) It is due to nearly same size, electronegativity and same polarising powerii) Li has similar properties with H2iii) BeO, Al2O are amphoteric in natureiv) All d-block elements are stable

The correct option is A Only (i) correctSuch relationship occurs because crossing and descending the periodic table have opposite effects.We have many like silicon and boron and so on.

The following are some statements about diagonal relationship.
i) It is due to nearly same size, electronegativity and same polarising power
ii) $L i$ has similar properties with $H_{2}$
iii) $B e O$ , $A l_{2} O$ are amphoteric in nature
iv) All $d$ -block elements are stable

The correct option is A Only (i) correct
Such relationship occurs because crossing and descending the periodic table have opposite effects.We have many like silicon and boron and so on.