Tag: evs - i

Questions Related to evs - i

Assertion : Preservatives are added to food items
Reason : Preservatives inhibit the growth of microorganisms

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

  3. Both Assertion and Reason are incorrect

  4. Assertion is correct but Reason is incorrect

  5. Assertion is incorrect but Reason is correct

Show answer
Correct Option: A
Explanation:

A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.


Preservatives increase shelf life of food materials by inhibiting growth of micro organisms and that is the reason why they are added to food items. 

The food is kept at low temperatures in a refrigerator because it:

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. saves money

  2. makes food more tastier

  3. kills bacteria present in the food

  4. is fashionable to keep the food in the refrigerator

Show answer
Correct Option: C
Explanation:

Bacteria do not grow at low-temperatures. So, food is stored at low-temperatures in refrigerator.


(iii) Which class of drugs is used in sleeping pills?

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. tranquilizers

  2. Antacid

  3. Disprine

  4. Paracetamol

Show answer
Correct Option: A
Explanation:

A tranquilliser :- refers to a drug which is designed for the treatment of anxiety, fear, tension, agitation, and disturbances of the mind, specifically to reduce states of anxiety and tension. 


It is also used in Sleeping pills.

Some scientists believe that a chemical widely used as a preservative and a colouring agent in foods gets converted to an acid in the stomach, affects the genes and causes cancer in human beings. Identify that substance.

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. Ferric chloride

  2. Sodium nitrite

  3. Vinegar

  4. Sulphur dioxide

Show answer
Correct Option: B
Explanation:

Sodium nitrite and nitrate closely are related chemicals that have been used for centuries to preserve meat. While nitrate itself is harmless, it easily converts to nitrite, which when combined with secondary-amine compounds forms nitrosamines, a powerful cancer-exacerbating chemical. This chemical reaction occurs easily during the frying process.


Which of the following is used as a food preservative?

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. Citric acid

  2. Sucralose

  3. Salts of sorbic acid

  4. Ascorbic acid

Show answer
Correct Option: A,C,D
Explanation:
Citric acid is used both as a natural flavor enhancer and preservative in a variety of foods, such as jams and jellies, canned fruits and vegetables. It's also used in ice cream, fruit drinks, candy, and carbonated beverages.
Sucralose is an artificial sweetener and sugar substitute.
Sorbic acid and its salts, such as sodium sorbate, potassium sorbate, and calcium sorbate, are antimicrobial agents often used as preservatives in food and drinks to prevent the growth of mold, yeast, and fungi. In general the salts are preferred over the acid form because they are more soluble in water, but the active form is the acid.
Ascorbic acid is a popular natural ingredient preservative. It can be used as a preservative in a vast array of food products, including bread, cured meats, jams and jellies, and other sauces and spreads.
therefore option A, C and D are correct

Which irrigation technique is considered the most water efficient? 

evs - i receding water table patterns of cropping rotation of crops common irrigation systems

  1. Surface

  2. Drip

  3. Sprinkler

  4. Spray

Show answer
Correct Option: B
Explanation:

Drip irrigation is most economical and efficient technique of irrigation. Watering plants by drip irrigation method is a more economical way of watering plants. In this technique, water is supplied drop by drop near the plant roots through the small opening is called as drippers. By this method, there is no loss of water due to seepage, runoff or evaporation. Thus, the correct answer is option B.

Which of the following irrigation procedure is/are followed when the land of cultivation is huge and the availability of water is scarce?

evs - i receding water table patterns of cropping rotation of crops common irrigation systems

  1. Drip irrigation

  2. Furrow irrigation

  3. Basin irrigation

  4. All of these

Show answer
Correct Option: A
Explanation:

A. Drip irrigation is a system of micro-irrigation system that allows the water to drip slowly to the roots of the plants.It is done in places where water is scarce. 

B. Sprinkler irrigation is the method of applying water to a controlled manner in that is similar to rainfall. This too is done to reduce the wastage of water . 
C. Furrow irrigation is conducted by small parallel channels among the field length in the direction of slope . 
D. Basin irrigation is where water is applied & distributed over the soil surface by gravity. 
So the correct options is ' Drip Irrigation & Sprinkler irrigation ' .

Which is a narcotic analgesic drug?

evs - i community health and hygiene diseases caused by changes in lifestyle diseases and toxic substance health and its maintenance

  1. Chloramphenicol

  2. Alprazolam

  3. Codeine and Morphine

  4. Paracetamol

Show answer
Correct Option: C
Explanation:

An opiate is a narcotic analgesic, that directly depresses the central nervous system. These opiates are prescribed for their analgesic or pain-relieving properties. Morphine, codeine and related drugs fall within this class and are sometimes referred to as narcotics.
Thus, the correct answer is option (C), 'Codeine and Morphine'.

The kidneys have built in mechanism for the regulation of glomerular filtration rate. One such efficient mechanism is carried out by juxtaglomerular apparatus(JGA). JGA is a specific sensitive region formed by
A. Afferent arteriole before it divides to form glomerulus
B. Cellular modifications in distal convoluted tubule where it is in contact with afferent arteriole
C. Macula densa cells
D. Glomerulus.

evs - i excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. A only

  2. A & B

  3. A, B & C

  4. A, B, C & D

Show answer
Correct Option: A

Renal physiology was described by

evs - i excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Ludwig

  2. Krebs

  3. Walter

  4. Claude

Show answer
Correct Option: A
Explanation:

Renal physiology was described by Ludwig. Renal physiology is the study of the physiology of the kidney.

This encompasses all functions of the kidney, including reabsorption of glucose, amino acids, and other small molecules; regulation of sodium, potassium, and other electrolytes; regulation of fluid balance and blood pressure; maintenance of acid-base balance; the production of various hormones including erythropoietin, and the activation of vitamin D.