The chlorophyll pigment is readily soluble in:-a)Waterb)Acidsc)Alkaliesd)AcetoneCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

The chlorophyll pigment is readily soluble in acetone. Chlorophylls possess a phytyl chain which is bound to a porphyrin ring system. The possession of the phytyl side chain, which is esterified to the carboxyl group of the ring, gives the chlorophylls their lipid character. Moreover, chlorophylls are fat-soluble compounds that can be extracted from water-containing living plant tissue by organic solvents such as acetone, methanol, or ethanol, which can take up water.

Answer

Chlorophyll Pigment Solubility

Chlorophyll is a green pigment found in plants, algae, and cyanobacteria. It plays a vital role in photosynthesis, the process by which plants convert light energy into chemical energy. Chlorophyll pigment is insoluble in water, acids, and alkalies but readily soluble in acetone.

Why is Chlorophyll Pigment Soluble in Acetone?

Chlorophyll pigment is a hydrophobic molecule, meaning it repels water and does not dissolve in it. Acetone, on the other hand, is a polar solvent that can dissolve hydrophobic molecules. This property of acetone makes it an effective solvent for chlorophyll pigment.

Other Solvents that can Dissolve Chlorophyll Pigment

Apart from acetone, other solvents that can dissolve chlorophyll pigment include ethanol, methanol, and dimethyl sulfoxide (DMSO). However, acetone is the most commonly used solvent for extracting chlorophyll pigment due to its high solubility and low toxicity.

Applications

The solubility of chlorophyll pigment in acetone has several applications in the field of biology and chemistry. Some of these applications are:

- Extraction of chlorophyll from plant tissues for analysis
- Separation of chlorophyll from other pigments in a mixture
- Identification of unknown compounds that absorb light in the visible spectrum

In conclusion, chlorophyll pigment is insoluble in water, acids, and alkalies but readily soluble in acetone. The solubility of chlorophyll pigment in acetone has several applications in the field of biology and chemistry.

Answer

The three main groups of photosynthetic pigments are the chlorophylls, xanthophyllsand carotenoids. Most photosynthetic pigments are insoluble in water but soluble in non-polar solvents such as ether, acetone and chloroform.The long hydrocarbon (phytol) tail attached to the porphyrin ring makes chlorophyll fat-soluble and insoluble in water. Two different types of chlorophyll (chlorophyll a and chlorophyll b) are found in plants  porphyrin consists of four pyrrole rings (five-membered closed structures containing one nitrogen and four carbon atoms) linked to each other by methine groups (−CH=).

Answer

Pigments: Pigments are 'molecules that absorb specific wavelengths (energies) of light and reflect all others.' Pigments are colored: the color we see is the net effect of all the light reflecting back at us.Now, what do I mean by absorb? Electrons in molecules can exist at specific energy levels. Normally they exist at the lowest possible energy level they can. However, if enough energy comes along to boost them into the next level, they can 'absorb' that energy and occupy that higher level. This is what pigments do. The light they absorb contains' just the right amount' of energy necessary to push them into the next level. Any light that does not have enough or has too much energy can not be absorbed and is reflected.

Answer

Chlorophyll is soluble in acetone. When the sample is macerated in acetone, chlorophyll gets dissolved in it. The optical density of the extract is measured at 663 and 645 nm wavelengths using spectrophotometer because at these wavelengths, maximum absorption of chlorophyll “a” and “b” takes place respectively

Answer

D

Similar NEET Doubts

Example of water soluble plant pigment is

Chlorophylls are the green photosynthetic pigments and out of a, b, c, d and e types of chlorophylls occurring in plants, chlorophyll a and b occur in the chloroplasts of higher plants. Which of the following is the characteristic of chlorophyll b?

In human beings the respiratory pigment is. a.haemoglobin. b. chlorophyll c.melanin. d.biliverdin plz. give me a correct answer

Which of the following pigment absorb maximum light?

Photosynthetic pigment capable of absorbing green light is 1)phycocyanin. 2)carotenoid. 3)phycoerythrin. 4)chlorophyll

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

DPP: Daily Practice Problems for NEET

Top Courses for NEET

Top Courses for NEET

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company