Tag: evs - i

Questions Related to evs - i

Which of the following food preservation technique is mainly used to decrease the moisture content of the food?

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Pasteurization

  2. Sterlization

  3. Dessication/ Drying

  4. None of the above

Show answer
Correct Option: C
Explanation:
Desiccation is also known as drying or dehydration. This is an ancient technique of food preservation in which food is dried thus initiating the growth of bacteria, yeast and moulds through the removal of water.

The cheapest method of protecting food grains from the attack of fungi to

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Burying in the ground

  2. Spraying with insecticide

  3. Drying in sunlight

  4. Furnigation

Show answer
Correct Option: C
Explanation:

The improved solar energy treatment (ISET), which consisted of soaking of seeds in water (1:1 w/v) in a galvanized tub tightly covered with a transparent polythene sheet during September for 6 h (08.00-14.00 h) and keeping the seeds under the sun, was most effective, providing more than 96% control of loose smut, 73.64% control of Karnal bunt, and complete control of flag smut. The treatment had no adverse effects on seed germination. 

So, the correct option is C. (Drying in sunlight )

Fruit, meat and milk are preserved at room temperature by the process of

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Pasteurisation

  2. Fridge

  3. Dehydration

  4. Vernalisation

Show answer
Correct Option: C
Explanation:

There are various methods of preserving the food items. These methods include Pasterurisation (high temperature), Fridge (low temperature), dehydration (drying), etc. Fruit, meat and milk can be preserved at room temperature by the process of dehydration. This is the most easiest and oldest method of preservation. In this, the water or moisture is removed from the food. This inhibits the growth of microorganisms and increases the shelf life of food. Vernalisation is a process of induction of flowering process in plants by exposure to the prolonged cold temperature.

Thus, the correct answer is 'Dehydration.'

Dehydration reduces the growth of bacteria because_______________________.

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. It destroys the protein

  2. It reduces the water which is required for bacterial activity

  3. It increases the acid content of the food

  4. All of the above

Show answer
Correct Option: B
Explanation:
Reduction of water intake in cells of bacteria presents their growth and germination of spores.
When water activity is decreased, the lag phase of bacteria is increased thus decreasing the growth rate on other hand.

Ancient methods of food preservation include

evs - i methods of preserving food food spoilage and food preservation food poisoning and food preservation methods food spoilage, adulteration and preservation

  1. Pasteurizing and sterilizing

  2. Canning, blanching, and irradiating

  3. Freezing and boiling

  4. Drying, smoking, and fermenting

Show answer
Correct Option: D
Explanation:
Ages-old food preservation techniques include drying, smoking, cooling, freezing, fermenting, salting, pickling, and canning. Drying and smoking are one of the most ancient methods of food preservation. It works because it removes much of the food's water. Without adequate water, microorganisms cannot multiply and chemical activities greatly slow down. Prehistoric cave dwellers heat-dried meat and fish, which probably led to the development of smoking as another way to preserve these foods. Fermentation was particularly useful for people in southern climates, where cooling and freezing were not practical. When a food ferments, it produces acids that prevent the growth of organisms that cause spoilage. Grapes, rice, and barley were fermented into wine and beer by early people. Fermentation also was used to produce cheese and yogurt from milk.
Therefore, the correct answer is option D.

Excessive intake of alcohol causes

evs - i food components energy from different food components nutritional requirements of the body need for nutrients simple test for nutrients test for nutrients

  1. Jaundice

  2. Dermatitis

  3. Liver cirrhosis

  4. Lung Fibrosis

Show answer
Correct Option: C
Explanation:

Cirrhosis is an abnormal liver condition in which there is irreversible scarring of the liver. People with cirrhosis may develop jaundice, itching and extreme tiredness. When liver tries to break down alcohol, the resulting chemical reaction damage its cells. This damage can lead to inflammation and scarring as the liver tries to repair itself.

Air pollution is caused by:

evs - i the environment and us ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. human.

  2. nature.

  3. both nature and man.

  4. forestation.

Show answer
Correct Option: C
Explanation:

Air pollution could be both due to natural or man-made causes. The major factors affecting composition of air are: area of forests in the region (potential cause of forest fires), industries present in the area, density of population, urbanization, etc.

The day-to-day condition of the atmosphere at a place with respect to the _______ is called the weather at that place.

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. temperature

  2. humidity, rainfall

  3. wind-speed

  4. all of the above

Show answer
Correct Option: D
Explanation:

The day to day condition of the atmosphere at a place with respect to $temperature, humidity, rainfall\, and\, wind-speed$ are called the weather at that place.

Which gas is emitted by the combustion of fossil fuels?

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. $CO _2$

  2. $SO _2$

  3. $H _2S$

  4. $NO _2$

Show answer
Correct Option: A
Explanation:

Carbon dioxide is the major gas along with smaller amounts of methane and nitrous oxide which are emitted by the combustion of fossil fuels such as coal, oil, and natural gas and contribute to the major green house gases.

So, the correct answer is option A.

What are the effects of air pollution?


i. greenhouse effect
ii. smog
iii. respiratory disease
iv. acid rain

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. i,ii, iii

  2. ii, iii, iv

  3. iii, iv, i

  4. i, ii, iii, iv

Show answer
Correct Option: D
Explanation:

Effects of Air Pollution are greenhouse effect, smog, deforestation and acid rains.