Improvement In Food Resources

Que 1. Ravi Prasad, a farmer has 25 acres of land. He noticed some infection on the leaves of his crops. He called his friend Raghav, who advised him to use DDT. However, Ravi Prasad preferred to use dry powder of neem leaves as an insecticide. 

Answer the following questions based on the above information: 

(i) Why did Ravi Prasad prefer using neem powder? 

(ii) In your opinion, did he take the right decision? 

(iii) Write the values associated with decision taken by Ravi Prasad?

Ans. (i) Neem powder is a natural disinfectant whereas DDT is a chemical disinfectant and has harmful effects when it enters the body of any living being. 

(ii) Yes because neem leaves are not harmful in any way. 

(iii) Environmental concern and empathy.

Que 2. Adulteration is becoming a very serious problem of our society. Study reveals that more people die because of food adulteration rather than hunger. Shopkeepers mix harmful chemicals and things in food items to earn more profit which may even lead to deaths. 

Answer the following questions based on the above information: 

(i) Being a responsible citizen how can you fight against adulteration? 

(ii) Give an example of a food adulterant. How can it be tested? 

(iii) How can Government curb adulteration?

Ans. (i) By sensitising people about adulteration. 

(ii) Small amount of pebbles/impurities are mixed in pulses. When the pulses are washed the impurities float on the water. 

(iii) Government can put a strict ban on adulteration; cancel the licenses of the shopkeepers selling adultered foods.

Que 3. Nectar, a sweet viscous liquid secreted by flowers, is sucked by bees and converted to honey by the action of an enzyme. It is then stored in special cells of hives. This honey is of enormous use to man. Keeping this in mind, bee keeping has become an important agricultural enterprise. 

Based on this text, answer the following questions: 

(i) Name the enzyme which converts nectar to honey. 

(ii) How is honey useful to man? 

(iii) Give three points by which you can show that honey bee provides some good examples of values for human being.

Ans. (i) Invertase 

(ii) (a) Honey has great food value and medicinal value. 

(b) It is an essential requirement for children as it is rich in iron, calcium and helps body to grow. 

(c) Honey is a source of sugar in confectionary items. 

(d) Beehives are a source of wax, propolis and bee-venom. 

(iii) (a) Honey bees are social, colonial creatures. 

(b) They provide very good example of division of labour and caste system 

(c) They are hard workers and show disciplinery attitude.

Que 4. Neeta is visiting her relatives in Bhopal. One day her aunt expressed unhappiness with the milk supplied by the milkman. She complained of adulterated milk. Neeta asked her to buy an
instrument to check the purity of milk. Next day, the supplied milk was tested and found water being mixed in the milk. Neeta's aunt informed all her neighbors about the instrument. 

(i) What values are shown by Neeta, her aunt and the milkman respectively? 

(ii) Identify the instrument and the principle on which it is based?

Ans. (i) Neeta value-awareness, Aunt value-concern showing so she shared among the neighbours, Milkman value-cunning. 

(ii) Lactometer, which is based on Archimedes's principle.