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UPSC 2003: Consider the following statements The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is 1. To keep the washing powder dry 2. To maintain the alkalinity of the powder Which of these statements is/are correct?
(a)Only 1
(b)Only 2
(c)Both 1 and 2
(d)Neither 1 nor 2
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Not attemptedCorrect Answer: (c) Both 1 and 2
Sodium sulfate is used as an inert ‘filler’ that absorbs moisture and prevents caking, keeping the washing powder free-flowing, while sodium silicate acts as a builder/buffer that raises and stabilises the alkalinity of the wash liquor; hence both statements 1 and 2 are correct. ([jrj-elementix.com](https://www.jrj-elementix.com/blog/what-are-the-applications-of-sodium-sulfate-in-detergents?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2003 Science & Technology question?▼
The correct answer is option (c): Both 1 and 2. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Chemistry question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2003, GS Paper 1, as Question 45. It falls under Science & Technology > Chemistry.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Chemistry?▼
UPSC has asked 53 questions from Chemistry (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.