Mineralogy | MCQs

Explanation

The phenomenon where a chemical element exists in multiple crystalline forms is called allotropy

Allotropy refers to the ability of an element to exist in two or more different forms in the same physical state.

This is different from polymorphism, which is a broader term referring to any substance (not just elements) that can exist in multiple crystalline forms. 

Explanation

The pair that is not isomorphous is Na₂CO₃, CaCO₃. 

While both compounds have similar chemical formulas.

The difference in ionic radii between sodium and calcium leads to different crystal structures, making them not isomorphous.

Explanation

 Onyx is actually a type of marble and it has many of the same properties.

Explanation

Widow’s tears (Tradescantia virginiana), more commonly known as Virginia spiderwort, spider lily or trinity flower, is an herbaceous pgeerennial plant

Explanation

Tincal is The substance that is found in dried-up lakes of Tibet and California

ٹنکل وہ مادہ ہے جو تبت اور کیلیفورنیا کی خشک جھیلوں میں پایا جاتا ہے۔