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

A. Ru

B. Be

C. Fr

D. Rb

Correct Answer :

A. Ru


Related Questions

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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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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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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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A metal may have atomic number

A. 85

B. 32

C. 38

D. 2

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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 have maximum size?

A. Cl

B. N2

C. F

D. Ne

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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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Second electron affinity of the elements is always

A. positive

B. negative

C. zero

D. more than first E.A.

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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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Law of octaves was given by

A. Meyer

B. Mendeleev

C. Moseley

D. Newland

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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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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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Which of the following has highest ionisation energy?

A. Be

B. Cl

C. Ba

D. N

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Which of the following has the maximum size?

A. Al-

B. Ne

C. Na+

D. F-

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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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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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Which of the following conform both cation and anion?

A. I

B. Cl

C. K

D. F

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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. F

B. Cl

C. Br

D. I

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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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Which of the following has minimum ionisation energy

A. Ca

B. In

C. Te

D. Rb

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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-

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The element with no definite place in the periodic table is

A. At

B. H

C. N

D. Pt

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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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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 species have minimum size?

A. Br-

B. S-2

C. Ne

D. K+

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The general electronic configuration of s-block elements is

A. ns1-2

B. ns2p6

C. ns1

D. ns0 to2

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Which of the following has maximum ionisation energy?

A. Li

B. Ba

C. Cl

D. Be

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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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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