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Test: Acids Bases & Salts - UPSC MCQ


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10 Questions MCQ Test - Test: Acids Bases & Salts

Test: Acids Bases & Salts for UPSC 2024 is part of UPSC preparation. The Test: Acids Bases & Salts questions and answers have been prepared according to the UPSC exam syllabus.The Test: Acids Bases & Salts MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Acids Bases & Salts below.
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Test: Acids Bases & Salts - Question 1

Acid turns blue litmus:

Detailed Solution for Test: Acids Bases & Salts - Question 1

Litmus paper is used as an indicator to check acids and bases. Acids turn blue litmus red.

Test: Acids Bases & Salts - Question 2

An oxide is acidic and has a pungent odour. It could be

Detailed Solution for Test: Acids Bases & Salts - Question 2

Nitrogen dioxide is a reddish-brown gas with a pungent, acrid odor and one of the several oxides of nitrogen.
 Sulfur dioxide (SO₂) is a acidic colorless gas with a characteristic, irritating, pungent odor.

Test: Acids Bases & Salts - Question 3

Acids taste

Detailed Solution for Test: Acids Bases & Salts - Question 3

Acids taste sour due to their acidic properties and interaction with the taste buds on our tongues. The sour taste is a result of the release of hydrogen ions and their interaction with specific receptors on our taste buds. Carbon dioxide is incombustible and also does not support burning. Hence, it is used in fire extinguishers.

Test: Acids Bases & Salts - Question 4

Acid present in soured curd is:

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Lactic Acid is present in sour milk or curd. The increased acidity causes the milk proteins (casein) to tangle into strong masses or curds.

Test: Acids Bases & Salts - Question 5

Which of the following is a natural indicator?

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Turmeric is a natural acid-base indicator. It turns yellow in an acidic medium and changes its colour to red in a basic medium.

Test: Acids Bases & Salts - Question 6

Which one of the following fruits contains ascorbic acid?

Detailed Solution for Test: Acids Bases & Salts - Question 6

Guava is the highest source of ascorbic acid and is also high in dietary fibre. Ascorbic acid or vitamin C is a multi-functional nutrient. It promotes a healthy immune system and protects the body from chemical damage. All the citrus fruits such as guava, oranges, kiwi, etc, are a good source of vitamin C. Apples and tomatoes are also rich in vitamin C.

Test: Acids Bases & Salts - Question 7

In case of indigestion, we use:

Detailed Solution for Test: Acids Bases & Salts - Question 7

In case of indigestion, we use antacids. Antacids containing bases reacts with acids present in stomach to neutralise it.

Test: Acids Bases & Salts - Question 8

All acids contain:

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All acids contain hydrogen in common. When acids is mixed in water hydrogen ion is produced.

Test: Acids Bases & Salts - Question 9

The reaction between acid and base to form salt is called ______.

Detailed Solution for Test: Acids Bases & Salts - Question 9

A neutralization reaction is a chemical reaction in which an acid and base quantitatively react together to form salt and water as products.
Acid + Base → Salt + Water

Test: Acids Bases & Salts - Question 10

The correct way of making a solution of acid in water is to

Detailed Solution for Test: Acids Bases & Salts - Question 10
Why is it important to add acid to water?
Adding acid to water is the correct and safe way of making a solution. This method is important because it helps to prevent the acid from splashing or splattering, which can be dangerous. When acid is added to water, the heat generated is absorbed by the water, minimizing the risk of a sudden release of energy.
Step-by-step procedure of adding acid to water:
1. Gather the necessary materials:
- Acid: Ensure you have the correct type and concentration of acid needed for your solution.
- Water: Use distilled water to avoid any impurities or contaminants.
2. Prepare a suitable container:
- Choose a container that can safely hold the amount of solution you are preparing.
- The container should be heat-resistant and made of a material compatible with the acid being used.
3. Put on appropriate safety gear:
- Wear protective gloves, safety goggles, and a lab coat to protect yourself from any potential splashes or spills.
4. Add the water to the container:
- Fill the container with the desired amount of water. It is recommended to fill the container to about one-third of its capacity.
5. Slowly add the acid to the water:
- Carefully pour the acid into the water, using a funnel if necessary.
- The acid should be added slowly and in a controlled manner to prevent splashing or excessive heat generation.
- Stir the solution gently if needed to ensure proper mixing.
6. Continue stirring and monitoring:
- Use a glass stirring rod or a magnetic stirrer to mix the solution thoroughly.
- Observe the solution for any signs of heat generation or other reactions.
7. Dispose of the solution properly:
- If needed, neutralize the solution before disposal according to proper waste management guidelines.
Key points to remember:
- Always add acid to water, not the other way around.
- Adding acid to water helps to control the release of energy and minimize the risk of splashing or splattering.
- Follow proper safety precautions, including wearing protective gear and using suitable containers.
- Monitor the solution for any signs of reactions or excessive heat generation.
- Dispose of the solution properly and according to established guidelines.
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