STD 7 Science Taste -5

Explanation
The correct answer is Black. This suggests that there are certain fruits whose skins turn black. This could be due to various reasons such as the fruit being overripe, damaged, or exposed to certain environmental factors. The black color could indicate spoilage or decay in the fruit.

Explanation
The correct answer is "Food" because the question is asking for something to be added to the plate, and food is a common item that is typically placed on a plate for eating.

Explanation
World Food Day is celebrated on 16th October every year. It is a day dedicated to raising awareness about hunger and promoting global efforts to end world hunger. This date was chosen to commemorate the founding of the Food and Agriculture Organization (FAO) of the United Nations in 1945. On this day, various events and activities are organized worldwide to highlight the importance of food security, sustainable agriculture, and nutrition. It serves as a reminder of the need to take collective action to ensure that everyone has access to safe, nutritious, and sufficient food.

Explanation
Some chemicals are injected into fruits to make them more attractive and tasty.

Explanation
In 1954, the parliament passed the Prevention of Food Adulteration Act. This act was enacted to prevent the adulteration of food and ensure the safety and quality of food products for consumers. It aimed to regulate the manufacture, storage, distribution, and sale of adulterated food products, and to establish standards for food safety. The act provided for the appointment of food inspectors, penalties for offenders, and the establishment of food laboratories for testing and analysis. This legislation was a significant step towards protecting public health and ensuring the integrity of the food supply chain.

Explanation
Salt is a natural type of food preservative because it has been used for centuries to preserve food. It works by drawing out moisture from food, which creates an environment where bacteria and other microorganisms cannot survive. Salt also enhances flavors and can help to inhibit the growth of certain types of bacteria that can cause food spoilage. Therefore, it is considered a natural and effective way to preserve food.

Explanation
Vinegar is a chemical type of food preservative because it is made through a fermentation process that involves the conversion of ethanol into acetic acid by bacteria. This acetic acid acts as a preservative by inhibiting the growth of bacteria and other microorganisms that can spoil food. Therefore, vinegar is considered a chemical preservative rather than a natural one.

Explanation
Phosphoric acid is frequently used as a chemical additive in carbonated soda and cold drinks. It provides a tangy flavor and acts as a preservative. Therefore, the correct answer is Phosphoric acid.

Explanation
The odd man out in this group is salt because salt is not an acid like the other three options. Vinegar, citric acid, and sodium benzoate are all types of acids commonly used in cooking or food preservation, while salt is a compound composed of sodium and chloride ions.

Explanation
Turmeric powder is the correct answer because it is the only item in the list that is commonly used as a spice in cooking. Lakhi dal, brick dust, and mythanyl yellow do not have any known culinary uses. Therefore, turmeric powder stands out as the correct answer.

Explanation
The given list consists of fruits and nuts. Banana, apple, and guava are all fruits, while almond is a nut. Therefore, the correct answer is almond, as it is the only item in the list that is not a fruit.

Explanation
The given list consists of different actions - storing, freezing, settling, and drying. Out of these actions, "storing" is the correct answer because it is the only action that involves keeping something in a particular place for future use. Freezing refers to the process of making something very cold, settling refers to the process of allowing particles to sink to the bottom, and drying refers to the process of removing moisture. Therefore, "storing" is the most appropriate action in this context.

Explanation
Fruits or their skin can turn black due to various reasons. One common reason is the process of oxidation, where the fruit's flesh or skin reacts with oxygen in the air, causing it to darken. This is commonly seen in fruits like bananas, apples, and avocados. Another reason for blackening of fruits can be fungal or bacterial infections, which can cause rotting and discoloration. Additionally, bruising or physical damage to the fruit can also lead to blackening. Therefore, it is true that sometimes fruits or their skin can turn black.

Explanation
Melathion is an insecticide commonly used to control pests in stored grains and food products. Spraying it on gunny bags containing food grains helps to protect the grains from infestation by insects and pests. Therefore, the statement is true.

Explanation
This statement is incorrect. Contaminants can indeed cause illnesses, including poisoning. Contaminants refer to harmful substances or pollutants that can contaminate food, water, air, or other environments. When these contaminants enter the body, they can disrupt normal bodily functions and lead to various health issues, including poisoning. Therefore, the correct answer is False, as contaminants can cause illnesses, including poisoning.

Explanation
The statement suggests that certain chemicals can react with metals, causing them to spoil or deteriorate. This is true because certain metals can undergo chemical reactions when exposed to substances such as acids or corrosive materials, leading to their degradation or damage. Therefore, it is important to handle chemicals carefully and avoid contact with metals to prevent spoilage or potential hazards.

Explanation
Naturally available food materials can indeed spoil if they are not handled properly. Factors such as improper storage, exposure to air, moisture, and temperature fluctuations can lead to the growth of bacteria, fungi, and other microorganisms that cause food spoilage. Additionally, mishandling during transportation, processing, or preparation can also contribute to the spoilage of food. Therefore, it is important to handle and store food correctly to prevent spoilage and maintain its quality and safety.

Explanation
The given question is asking what should be eaten. The correct answer is "Food" because it is the only option that is relevant to the context of serving oneself and eating. Medicine and water are not typically served to oneself for consumption, and option 4 is not a valid option as it does not provide any information. Therefore, the correct answer is "Food".