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D-Block Elements Test MCQ

In which form zinc is present in the ore willemite?

ZnO

ZnS

ZnCo3

Zn2SiO4

Answer

Correct Answer: Zn2SiO4

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What is the nature of Zn (OH) 2?

Acidic

Amphoteric

Basic

Neutral

Answer

Correct Answer: Amphoteric

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What is the use of Zeigler – Natta catalyst?

In the Ostwald process for converting NH3 into NO

Polymerization of alkyne to give benzene

Oxidizing alcohols to aldehydes

Polymerization of ethane to produce polythene

Answer

Correct Answer: Polymerization of ethane to produce polythene

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The process used for the extraction of gold is:

Sodium amalgam vertical retort process

Mac Arthur – Forest cyanide process

Bayer’s process

Parke’s process

Answer

Correct Answer: Mac Arthur – Forest cyanide process

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Which among the following show variable oxidation states?

All

Answer

Correct Answer: All

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What happens when NH4OH is added to a solution of copper sulphate?

A deep blue solution is obtained

Blue precipitate of copper hydroxide is obtained

No change is observed

Black precipitate of copper oxide is obtained

Answer

Correct Answer: A deep blue solution is obtained

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What is the equivalent weight of KMnO4 when it is converted in MnSO4?

M/5

M/6

M/2

M/3

Answer

Correct Answer: M/5

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Which among the following is a set of transition elements?

Pt, Cd, Sb

Sn, Bi, Mn

Hg, Pb, Cu

Zr, Au, Ni

Answer

Correct Answer: Zr, Au, Ni

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Cd2+ is isoelectronic with:

Zn2+

Pb2+

Ag+

Cu2+

Answer

Correct Answer: Ag+

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Which of the following statement is correct?

Zinc reacts with dil. HNO3 to produce N2

Zinc reacts with conc. HNO3 to produce of mixture of NO and NO2

Zinc reacts with dil. HNO3 to produce NO2

Zinc reacts with very dil. HNO3 to produce NH4NO3

Answer

Correct Answer: Zinc reacts with very dil. HNO3 to produce NH4NO3

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Zinc and mercury differs in showing variable valency like d – block elements because:

They are soft

Their d – shells are incomplete

They have only two electrons in the outermost shell

Their d – shells are complete

Answer

Correct Answer: Their d – shells are complete

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Coinage metals show the properties of:

Typical elements

Normal elements

Transitional elements

Inert elements

Answer

Correct Answer: Transitional elements

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Similarity between Nb and Ta is because they:

Belong to same group of periodic table

Are transition metals

Have almost same ionic and covalent radii

Have the same mineral source

Answer

Correct Answer: Have almost same ionic and covalent radii

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Due to which property Zr and Hf shows similar atomic and ionic size?

They are in the same group

Lanthanide contraction

Diagonal relationship

They have similar chemical properties

Answer

Correct Answer: Lanthanide contraction

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Which among the following is a Zeigler – Natta?

Pt/Rh

Pt/PtO catalyst

TiCl4/Al(C2H5)3

Answer

Correct Answer: TiCl4/Al(C2H5)3

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