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Which of the following has maximum ionisation energy ?

A. Li

B. Be

C. C

D. B

Correct Answer :

B. Be


Related Questions

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Which of the following atoms is paramagnetic?

A. Zn

B. N

C. Ca

D. Sr

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Which of the following has maximum ionisation energy?

A. Li

B. Ba

C. Cl

D. Be

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Which of the following has maximum ionisation energy ?

A. Li

B. Be

C. C

D. B

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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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Which of the following is an inert gas?

A. Oxygen

B. Nitrogen

C. Argon

D. Hydrogen

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Which of the following conform both cation and anion?

A. I

B. Cl

C. K

D. F

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A metal may have atomic number

A. 85

B. 32

C. 38

D. 2

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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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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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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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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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The heaviest element is

A. Cs

B. Na

C. Hg

D. U

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Ionisation energy is the amount of energy required to remove

A. the most loosely bound electron from an isolated gaseous atom

B. an electron from an atom of an element

C. an electron from an isolated gaseous atom

D. an electron from covalently bonded atom in a molecule

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Which of the following has highest ionisation energy?

A. Be

B. Cl

C. Ba

D. N

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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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Which of the following have negative electron affinity?

A. Kr

B. U

C. Y

D. Pb

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

A. Inner Transition elements

B. Representative elements

C. Inert elements

D. Noble gases

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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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Second electron affinity of the elements is always

A. positive

B. negative

C. zero

D. more than first E.A.

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Ionisation energy of potassium is 425 kJ mol-1. The minimum frequency of a photon that can effect the ionisation is

A. 96.5×1015sec-1

B. 1.065×1014sec-1

C. 1.065×1012sec-1

D. 1.065×1015sec-1

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Which of the following has minimum ionisation energy

A. Ca

B. In

C. Te

D. Rb

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Arrange the following set of atoms in the order of increasing atomic radius : F, Cl, C, O

A. F, Cl, O, C

B. C. O, F, Cl

C. O. C, F, Cl

D. F, O, C, Cl

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

A. Ru

B. Be

C. Fr

D. Rb

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Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

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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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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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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-