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. Which of the following methods is not commonly used in the synthesis of bulk materials?

Microscale synthesis correct incorrect

Solution methods. correct incorrect

Direct synthesis methods correct incorrect

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. When will Wadsley defect occur in a solid?

When cation and anion exchange the positions in the crystal lattice correct incorrect

When the shear planes have random distribution through the solid structure. correct incorrect

When the shear plane causes a displacement of either cation or anion in the structure anc creates a viod. correct incorrect

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. Which statement is correct?

Binary metal oxides with metal-to-oxygen ratios that are different from 1 are called higher oxides; oxides with more than one metal atom are called complex oxides. correct incorrect

The terms "higher oxides" and "complex oxides" can be used interchangeably. correct incorrect

Oxides with more than one metal atom are called higher oxides. correct incorrect

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. Glass is prepared by:

cooling the melt faster than it crystallizes correct incorrect

cooling the melt slower than it crystallizes correct incorrect

cooling the melt as fast as it crystallizes correct incorrect

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. For a reaction to be an insertion or an intercalation, the basic structure of the host:

should change entirely correct incorrect

should change no more than 50% correct incorrect

should not change entirely correct incorrect

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. Chevrel phases are of interest because:

They are superconducting. correct incorrect

They are ideal insulators. correct incorrect

They are semiconductors. correct incorrect

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. Intense color in inorganic solids can arise from d–d transitions, charge transfer, or intervalence charge transfer.

This is correct. correct incorrect

Only d–d transitions give rise to color in inorganic compounds. correct incorrect

Only intervalence charge transfer transitions give rise to color in inorganic compounds. correct incorrect

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. Titanium(IV) oxide (TiO₂) is a white pigment because:

It absorbs all wavelengths between 380 and 800 nm. correct incorrect

It absorbs no wavelengths in the VIS region. correct incorrect

It absorbs all wavelengths in the UV and IR regions. correct incorrect

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. Molecular inorganic magnetic materials:

do not exist correct incorrect

possess individual molecules or molecular assemblages that contain d-metal atoms with unpaired electrons correct incorrect

possess individual molecules or molecular assemblages that contain d-metal atoms with paired electrons correct incorrect

* not completed

. What is a nanomaterial?

A nanomaterial is a material composed of small molecules (i.e. not polymers or oligomers) containing covalent bonds. correct incorrect

A nanomaterial is any material used as a reactant in the synthesis of bulk materials correct incorrect

A nanomaterial is a solid material with dimensions between 1 and 100 nm and that exhibits particular properties related to its minute dimensions. correct incorrect