Assertion (A) Acid dyes are suitable for wool and silk.
Reason (R) Acid dyes form ionic bonds with the hydroxy groups found in wool and silk.

Assertion (A) Acid dyes are suitable for wool and silk.
Reason (R) Acid dyes form ionic bonds with the hydroxy groups found in wool and silk. Correct Answer A is correct but R is incorrect

Bissoy MCQ

Related Questions

Assertion (A) Acid dyes are suitable for wool and silk.
Reason (R) Acid dyes form ionic bonds with the amino groups found in wool and silk.
Assertion (A) Acid dyes are suitable for wool and silk.
Reason (R) Acid dyes form iconic bonds with the hydroxy groups found in wooland silk.
Which of the following statements is/ are correct?
1. Uniform silk yarns are more suitable for weaving on high speed looms than hand reeled silk yarns.
2. Reeling or unwinding the filament from the cocoon is done in an establishment called a filature.
3. Doupion silk comes from two silk worms who spin their cocoon together.
4. Reeled silk or Gandhi Ashram silk is a long continuous filament 300-1600 yards in length.
Selects the correct answer
Which of the following statements are true about the Silk Route? I. The Silk Route was exclusively used for trading of silk. II. The route also served as a great channel for the transmission of cultures. III. The Silk Route bifurcates into Eastern, Western, Northern and Southern Silk Route. IV. Khotan was one of the most important place on the Southern Silk Route.
Given below are characteristics of an “ionic compound”. Identify the option that gives INCORRECT information. A. Ionic compounds are generally found in solid state. B. Ionic compounds have low melting point and high boiling point. C. Ionic compounds are soluble in solvents like benzene, etc. D. The X-ray analysis of ionic compounds reveals that they exist as molecules.
The following paragraph is taken from the Class VII science NCERT textbook-Discovery of silk: The exact time of the discovery of silk is perhaps unknown. According to an old Chinese legend, the empress Si-lung-Chi was asked by the emperor Huang-ti to find the cause of the damaged leaves of mulberry trees growing in their garden. The empress found white worms eating up mulberry leaves. She also noticed that they were spinning shiny cocoons around them. Accidentally a cocoon dropped into her cup of tea and a tangle of delicate threads separated from the cocoon. The silk industry began in China and was kept a closely guarded secret for hundreds of years. Later on, traders and travelers introduced silk to other countries. The route they traveled is still called the 'silk route'. What is the purpose of including the above in a science textbook?  a. to develop a historical perspective. b. to develop an appreciation of how incidents/ideas give rise to the discovery of new things. c. to develop a holistic understanding of science d. to make science textbooks light as the above is just for information and not for testing
An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.
The silk production of Karnataka is 100% more than the silk production of Kerala. Show half the silk production of Kerala as a percentage of the silk production of Karnataka.
Consider the following statements.
1. Glass wool has tensile strength greater than steel.
2. Glass wool is fire proof.
3. Glass wool has high electrical conductivity and absorbs moisture.
4. Glass wool is used to prepare libre glass.
Which of the statements given above are correct?
Which one of the given responses would be a meaningful order of the following? 1. Carding of wool, 2. Sorting of wool, 3. Spinning of wool, 4. Combing of wool