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What is the correct answer?

4

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

Correct Answer :

D. increases from C to F


Related Questions

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4

An element A has atomic number 7. It will have properties similar to the element with atomic number

A. 85

B. 57

C. 26

D. 51

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4

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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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

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

Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

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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 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

Which of the following has minimum ionisation energy?

A. F

B. Cl

C. Br

D. I

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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

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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4

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

A. Ru

B. Be

C. Fr

D. Rb

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4

The smallest ion amongst the following

A. Si+++1

B. K+

C. At1+1

D. Mg+1

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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

Which of the following atoms is paramagnetic?

A. Zn

B. N

C. Ca

D. Sr

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4

In the Mendeleef's periodic table properties of the elements are the periodic function of their

A. atomic weight

B. atomic number

C. atomic volume

D. none of these

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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 species have minimum size?

A. Br-

B. S-2

C. Ne

D. K+

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4

3.Atomic number of an element X is 34, it belongs to

A. IV period, VIA group

B. IV period, IIA group

C. V period, III B group

D. IV period, VII A group

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4

IV Period has.........elements.

A. 18

B. 36

C. 8

D. 9

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4

The heaviest element is

A. Cs

B. Na

C. Hg

D. U

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4

Elements whose atoms have incompletely filled penultimate energy levels are known as

A. s-block elements

B. p-block elements

C. d-block elements

D. inert gases

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4

Which of the following has maximum electron affinity ?

A. Cl

B. Br

C. I

D. F

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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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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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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

The successive ionisation energies of an atom of an element A are:
900 kJ mole1, 1757 kJ mole-1, 14850 kJ mole-1 respectively. The element is most likely to be

A. B

B. Be

C. F

D. Ba

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4

An atom of an element has electronic configuration (Ar) 4s23d5, the element belongs to block

A. s

B. p

C. f

D. d

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4

The pair of elements that exhibit diagonal relationship is

A. Li-Mg

B. Al-Na

C. Ne-Ar

D. Si-P

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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