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Dyes

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(1) What is the most common method for producing aniline?

a) Nitration of benzene

b) Hydrogenation of nitrobenzene

c) Reduction of nitrobenzene

d) Electrophilic substitution of benzene

(2) Which of the following is not a natural dye?

a) Indigo

b) Tyrian purple

c) Cochineal

d) Methylene blue

(3) Which class of dyes is most commonly used in the textile industry?

a) Azo dyes

b) Acid dyes

c) Basic dyes

d) Direct dyes

(4) Which type of dye is typically used for dyeing wool?

a) Acid dyes

b) Basic dyes

c) Direct dyes

d) Disperse dyes

(5) What is the primary use of crystal violet?

a) Textile dyeing

b) Biological staining

c) Ink manufacturing

d) Photographic processing

(6) What is the main difference between acid dyes and basic dyes?

a) Acid dyes are water-soluble while basic dyes are not.

b) Basic dyes are water-soluble while acid dyes are not.

c) Acid dyes are applied at high temperatures while basic dyes are not.

d) Basic dyes are applied at high temperatures while acid dyes are not.

(7) What is the primary use of safranin?

a) Textile dyeing

b) Biological staining

c) Ink manufacturing

d) Photographic processing

(8) What is the main difference between direct dyes and reactive dyes?

a) Direct dyes are water-soluble while reactive dyes are not.

b) Reactive dyes are water-soluble while direct dyes are not.

c) Direct dyes are applied to fabric without a mordant while reactive dyes require one.

d) Reactive dyes are applied to fabric without a mordant while direct dyes require one.

(9) What is the primary use of malachite green?

a) Textile dyeing

b) Biological staining

c) Ink manufacturing

d) Photographic processing

(10) What is the main difference between natural dyes and synthetic dyes?

a) Natural dyes are derived from plants or animals while synthetic dyes are not.

b) Synthetic dyes are derived from plants or animals while natural dyes are not.

c) Natural dyes are more expensive than synthetic dyes.

d) Synthetic dyes are more expensive than natural dyes.

Answers:

(1) c

(2) d

(3) a

(4) a

(5) b

(6) b

(7) b

(8) c

(9) b

(10) a

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Multiple Choice Questions (MCQs)

The UPSC (Union Public Service Commission) Prelims exam is the first step in the selection process for the Indian Administrative Service (IAS), Indian Foreign Service (IFS), and Indian Police Service (IPS) among other civil services in India. The exam consists of two papers: General Studies Paper 1 and General Studies Paper 2 (also known as the Civil Services Aptitude Test or CSAT). The General Studies Paper 1 is worth 200 marks and is comprised of multiple choice questions (MCQs). The exam tests the candidate's knowledge of current events, Indian and World history, Indian and World geography, Indian polity and governance, economic and social development, general science and environmental ecology and biodiversity.

The UPSC Prelims exam is a highly competitive exam and it is important for candidates to have a thorough understanding of the syllabus and to practice as many MCQs as possible to increase their chances of success.

You will have to answer all the questions within a limited time frame. So practice time management techniques and use a timer while solving mock tests.

The questions are designed to test the candidate's understanding of the subject matter and their ability to apply that knowledge in a practical context. So, MCQs on this website are prepared in that direction to make you conceptually strong.

The MCQs in UPSC Prelims are generally of the following types:

  1. Factual: These questions test the candidate's knowledge of basic facts, figures, and dates.
  2. Conceptual: These questions test the candidate's understanding of concepts and principles.
  3. Analytical: These questions test the candidate's ability to analyze and interpret information.
  4. Applied: These questions test the candidate's ability to apply their knowledge to practical situations.
  5. Current events: These questions test the candidate's knowledge of recent events and happenings.