Chemistry291

Is  blood a pure substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(A) Matter can be divided into pure substance and mixture.Then pure substance can be divided into elements and compounds. So from this classification,we can say that a compound is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element. In blood, we get more than one elements and compounds.So blood is neither a single compound nor a single element.As a result, it is not a pure substance.It doesn't have a  definite and fixed composition.Actually,it is a mixture.In blood,we get N₂,O₂,CO₂, Organic and inorganic compounds etc. Next

  Is  soil a pure substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(A) Matter can be divided into pure substance and mixture.Then pure substance can be divided into elements and compounds. So from this classification,we can say that a compound is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element. In soil we get more than one elements and compounds.So soil is neither a single compound nor a single element.As a result, it is not a pure substance.It doesn't have a  definite and fixed composition.Actually,it is a mixture.In soil,we get water,air,organic and inorganic compounds etc. Next

Is  air a pure substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(A) Matter can be divided into pure substance and mixture.Then pure substance can be divided into elements and compounds. So from this classification,we can say that a compound is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element. In air we get more than one elements and compounds.So air is neither a single compound nor a single element.As a result, it is not a pure substance.It doesn't have a  definite and fixed composition.Actually,it is a mixture.In air,we get N₂,H₂,CO₂ etc. Next

Is Gold (Au) a Pure Substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(B) "> (adsbygoogle = window.adsbygoogle || []).push({}); "> Matter can be divided into pure substance and mixture.Then pure substance can be divided into element and compound.So from this classification,we can say that an element is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element.Gold(Au) is an element.So it is a pure substance. Next

Is Carbon dioxide (CO2) a pure substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(B) Matter can be divided into pure substance and mixture.Then pure substance can be divided into elements and compounds.So from this classification,we can say that a compound is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element.Carbon dioxide is a compound.So it is a pure substance. Next

Is an Element a Pure Substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(B) Matter can be divided into pure substance and mixture.Then pure substance can be divided into element and compound.So from this classification,we can say that an element is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element. Next

Is a Compound a Pure Substance? Select one from the following options: A)No B)Yes C)Never D) Sometimes Answer:(B) Matter can be divided into pure substance and mixture.Then pure substance can be divided into element and compound.So from this classification,we can say that a compound is a pure substance.In pure substance,the composition remains fixed.An element is formed by only one type of atoms or by atoms which have same atomic number.On the other hand,a compound is formed by more than one element. Next