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What is the correct answer?

4

Law of octaves was given by

A. Meyer

B. Mendeleev

C. Moseley

D. Newland

Correct Answer :

D. Newland


Related Questions

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4

Which of the following is not an s-block element?

A. Ru

B. Be

C. Fr

D. Rb

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4

Which of the following has maximum ionisation energy?

A. Li

B. Ba

C. Cl

D. Be

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4

The general electronic configuration of s-block elements is

A. ns1-2

B. ns2p6

C. ns1

D. ns0 to2

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4

Which of the following elements is not liquid at room temperature, i.e., 25°C?

A. Hg

B. Br

C. Cl

D. Cs

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4

Which of the following did not find a place in Mendeleef's periodic table?

A. Fr

B. Na

C. Ce

D. CI

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4

Law of octaves was given by

A. Meyer

B. Mendeleev

C. Moseley

D. Newland

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4

With the increase in atomic number in a period of the periodic table

A. electron affinity decreases

B. metallic character decreases

C. ionisation energy decreases

D. atomic mass decreases

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4

Which of the following has the maximum size?

A. Al-

B. Ne

C. Na+

D. F-

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Lother Meyer plotted a graph of

A. Atomic volume versus atomic number

B. Atomic radii versus atomic weight

C. Atomic weight versus mass number

D. Atomic volume versus atomic weight

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4

Which of the following elements have maximum electronegativity?

A. Cl

B. Br

C. F

D. C

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4

A metal may have atomic number

A. 85

B. 32

C. 38

D. 2

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4

Which of the following atoms is paramagnetic?

A. Zn

B. N

C. Ca

D. Sr

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4

The differentiating electron enters in the penultimate energy level in the case of

A. s block ele.

B. p block ele.

C. d block ele.

D. f block ele.

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4

Which of the following conform both cation and anion?

A. I

B. Cl

C. K

D. F

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4

In the periodic table on moving from left to right across a period, the metallic character of elements

A. increases

B. decreases

C. increases and decreases

D. remains the same

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In C, N, O and F the electronegativity

A. decreases from C to F

B. decreases from C to O and then increases to F

C. increases from O to C and then decreases to F

D. increases from C to F

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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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On moving across a period from left to right the ionisation energy increases because

A. value of principal quantum number increases

B. effective nuclear charge increases

C. atomic size increases

D. nuclear charge increases

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4

Elements belonging to the same period are

A. Si, N, O

B. Li, Be, Mg

C. Sc. Ti. V

D. Cu, Zn, Cd

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An element has atomic number 2. It belongs to

A. O group

B. III A group

C. VI group

D. II B group

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In a Lother Meyer curve sodium occurs at

A. bottom

B. peak

C. some point on the curve

D. middle of the curve

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4

Which of the following is an inert gas?

A. Oxygen

B. Nitrogen

C. Argon

D. Hydrogen

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4

Which of the following have maximum size?

A. Cl

B. N2

C. F

D. Ne

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4

Which of the following has minimum ionisation energy?

A. F

B. Cl

C. Br

D. I

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4

O2-, FF-, Na+ and Mg2+ are isoelectronic, the order of increasing size is

A. F-<Na+g++<O2-

B. F-<O2-<Na+<Mg++

C. Mg++<F-<Na+<O2-

D. Mg++<Na+<F-<O2-

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4

The first atom with maximum number of d-electrons is with atomic number

A. 27

B. 46

C. 36

D. 29

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4

Which of the following has maximum ionisation energy ?

A. Li

B. Be

C. C

D. B

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4

Elements in the same vertical column has same

A. valence shell electronic configuration

B. electronic configuration

C. atomic number of isotopes

D. atomic size

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4

Arrange the following set of atoms in the increasing order of electron affinity: F, Sr, Ge, Se

A. Ge, Se, Sr. F

B. Se, Ge. Sr. F

C. Sr, Ge. Se. F

D. F, Sr, Ge. Se

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4

Which of the following have negative electron affinity?

A. Kr

B. U

C. Y

D. Pb