Chemistry Ch 3 Class 12 Group IIIA and IVA Elements





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The transition element which does not show variable valency is:

PMC 2020
Chemistry
d and f Block Elements
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Prussian blue is:

NUMS 2014
Chemistry
d and f Block Elements
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A six-coordinate complex of formula CrCl3.6H2O has green color. A 0.1 M solution of the complex, when treated with an excess of AgCl, gave 28.7 g of a white precipitate. The formula of the complex would be___________.

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Chemistry
d and f Block Elements
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IUPAC name for [Pt Cl Br (NO2) (NH3)3] Cl is:

NUMS 2015
Chemistry
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Which of the following does not act as ligand in the formation of complexes?

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Aluminium is in Nature

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Aluminum silicate is used In:

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Impurities of lead in silver are removed by:

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Chemistry
d and f Block Elements
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The formula of cryolite is

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Chromium dissolves in dilute H2SO4 for [Cr(H2O)6]2. The colour of the ion is:

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Chemistry
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The oxidation states of Boron are:

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Aluminium is a

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Burning of amorphous Boron in air forms

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In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn +2 and :

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Chemistry
d and f Block Elements
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Which element among the following forms a protective oxide coating on exposure to air?

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Which of the following transition metals in its ground state have unpaired electrons in an s-orbital?

NUMS 2015
Chemistry
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Which one is not the type of Boric Acid?

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) Aluminium is agent?

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Which of the following transition metals has the highest variable oxidation state?

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Chemistry
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Chemical formula of powder used in carom board is?

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The octahedral geometry of the complex [Co(NH3)6]2+ has hybridization:

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Electronic configuration of chromium (Proton number 24) is:

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Which of the following has the maximum number of unpaired d electrons?

NTS 2016 DUHS & JSMU
Chemistry
d and f Block Elements
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Which of the following is used to make container for nitric acid?

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) Which one of the following is metalloid?

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Ability of carbon to form long chains and rings is known as?

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Aluminum reacts with H2SO4 to produce

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Identify from the following the example in which the complex is an anion:

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Chemistry
d and f Block Elements
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Zinc reacts with dil. H2SO4 to give H2. It also reacts with conc. H2SO4 to form SO2. In these reactions.

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Which of the following is not an interstitial compound?

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Chemistry
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Boric acid is used in

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Which one of the following ions exhibits d-d transition and paramagnetism as well?

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Orthoboric acid can NOT be obtained by which of the following?

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Which of the following elements of Group 3 is non-metallic in character?

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Borax bead test is used to separate:

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Scandium, Sc, is the first of the 3d blocks of elements in the Periodic table.

Which properties of Sc approve the above fact?

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Valence electronic configuration Cu+2 is (29Cu)

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Transition Elements usually show:

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What is the chemical name of SANDUR?

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The color of transition metal complexes is due to transition of electrons between:

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Which of the following forms a layer of oxide on its exposure to moisture?

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Variable valency is generally exhibited by:

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silicon can be obtained from which one of the following compounds

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EDTA ion is a ________ ligand.

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Chemistry
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Which element of group 4A shows inert pair effect?

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Which one of the following is an acid?

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The total number of transition elements is:

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If a person is injected by shot of a gun and all the bullets are not removed from his body, it may cause poisoning by:

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Chemistry
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Solubility of Borax decahydrate at 100C is

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