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Questions >> JEEMAIN and NEET >> Chemistry >> d-and-f-Block Elements

Which of the following statements regarding the catalytic properties of transition metals are CORRECT?

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following transition elements are used in the preparation of $NH_3$ by haber's process?

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following statements about iron is INCORRECT given that Iron exhibits +2 and + 3 oxidation states.

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following is an example of Disproportionation of an oxidation state, in which a single substance is simultaneously reduced and oxidized to form two different products one with a higher oxidation state and one with a lower oxidation state?

asked Jan 29, 2014 by sreemathi.v

1 answer

What is the oxidation number of the transition metal in the complex ion [Co(H $_2$ O) $_5$ Cl] $^{+}$ ?

asked Jan 29, 2014 by sreemathi.v

1 answer

The main reason d-block elements exhibit a large number of oxidation states compared to f-block elements is because:

asked Jan 29, 2014 by sreemathi.v

1 answer

What is the oxidation state of Cobalt in CoBr $_2$ ?

asked Jan 29, 2014 by sreemathi.v

1 answer

The transition element which does not show variable oxidation state is

asked Jan 29, 2014 by sreemathi.v

1 answer

Highest oxidation state exhibited by a 3d-metal is

asked Jan 29, 2014 by sreemathi.v

1 answer

What is the oxidation state of Fe in FeCl $_3$ ?

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following salts are colourless?

asked Jan 29, 2014 by sreemathi.v

1 answer

The electronic configuration of divalent cation of Eu is

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1 answer

Which of the following is a lanthanide element?

asked Jan 29, 2014 by sreemathi.v

1 answer

The most common oxidation states of Gold are:

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following is a lanthanide?

asked Jan 29, 2014 by sreemathi.v

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The 2 most common oxidation states shown by cerium are

asked Jan 29, 2014 by sreemathi.v

1 answer

The electronic configuration of gadolinium is

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following transition metal ions are colourless?

asked Jan 29, 2014 by sreemathi.v

1 answer

The color of a transition metal complex results from which of the following reasons?

asked Jan 29, 2014 by sreemathi.v

1 answer

The oxidation state of Ni in $Ni(CO)_4$ is

asked Jan 29, 2014 by sreemathi.v

1 answer

Which of the following statements regarding transition elements is/are incorrect?

asked Jan 29, 2014 by sreemathi.v

1 answer

Magnese exhibits oxidation states

asked Jan 29, 2014 by sreemathi.v

1 answer

How many 'd' electrons are present in $Cr^{+2}$ ion?

asked Jan 29, 2014 by sreemathi.v

1 answer

The changed name of kurchatovium

asked Jan 29, 2014 by sreemathi.v

1 answer

The formula for calculating the Highest Oxidation State for a Transition metal can be given as follows: Number of Unpaired d-electrons + Two s-orbital electrons. This is true for all the transition metals except two. Which of the following two?

asked Jan 29, 2014 by sreemathi.v

1 answer

The catalyst used in manufacture of $HNO_3$ is

asked Jan 29, 2014 by sreemathi.v

1 answer

Liquid element(metal) among d-block is

asked Jan 29, 2014 by sreemathi.v

1 answer

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