Purification of a chemical substance is important before investigating its composition and properties.

Monjur Alahi

Give reason : 

Purification of a chemical substance is important before investigating its composition and properties.


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

  • Chemical substances occur in nature in impure stage.
  • Also, chemical substances synthesized in the laboratory are obtained in crude and impure form.
  • Impurities present in the chemical substances may interfere with the properties to be determined (e.g. melting point or boiling point).
  • Therefore, before investigating composition and properties of a given chemical substance, it is important to obtain it in the pure form.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
i. Minutes are prepared before the meeting. ii. Resolution is a proposal put before a meeting for discussion.

i. Minutes are prepared after the meeting. ii. Motion is a proposal put before a meeting for discussion. iii. Polling papers are used for voting by-poll. iv. A Resolution is a final decision taken in the meeting. v. The...

2 Answers 1 views
Fill in the blanks If heat energy is given to a substance and its temperature remains constant then the substance undergoes a change in_______.

Correct Answer - state

2 Answers 1 views
What are the various types of plastids? ii. Describe the chemical composition and functions of eukaryotic cell wall.

(i)1. Plastids are classified according to the pigments present in it. Three main types of plastids are – leucoplasts, chromoplasts and chloroplasts.  2. Leucoplasts do not contain any photosynthetic pigments they...

2 Answers 1 views
20. A coconut of mass \( 2 Kg \) is falling from a coconut free of height \( 10 m \). Find the potential energy, kinetic energy and total energy at the following points. \( \left( g =10 m / s ^{2}\right) \) a) Before falling from the coconut tree. b) Just before hilting the ground. c) At a height \( 4 m \) from the ground. d) Which law is evident from this example?

(a) Given m = 2 kg h = 10 m Potential energy at before falling from the coconut tree. u = mgh u = 2 x 10 x 10 u = 200 joule Kinetic energy will...

2 Answers 1 views
Which solvent is used for the purification of copper sulphate and benzoic acid?

The solvent used for the purification of copper sulphate and benzoic acid is water.

2 Answers 1 views
……………. defined an element as any substance that cannot be decomposed into further simple substance by physical or chemical change. 

B) Robert Boyle

2 Answers 1 views
The property of an element to exist in two or more physical forms with same chemical properties but different physical properties is called

C) allotropy

2 Answers 1 views
Explain the classification of proteins based on their chemical composition.

On the basis of structure, proteins are classified into three categories:  1. Simple proteins:  a. Simple proteins on hydrolysis yield only amino acids.  b. These are soluble in one or more solvents. c. Simple...

2 Answers 1 views
Sneha : A mixture has variable composition  Goutham : A compound has fixed composition 

A) Sneha and Goutham are correct

2 Answers 1 views
When the particles of a substance contain only one type of atoms, that substance is called a / an 

Correct option is B) element

2 Answers 1 views
X