Q34 of 75 Page 81

Iron is present in haemoglobin (in blood) which acts as oxygen carrier in our body. Deficiency of iron leads to anaemia. It must be a part of our diet.

Read the above passage and answer the following questions.


(i) Name a fruit and a green vegetable which contain iron. Is iron metal or non metal?


(ii) Give the chemical formula of iron sulphate.


(iii) How will you make students of your school aware that they must take iron in the diet regularly?

(i) A fruit which contains iron is pomegranate. It is iron rich fruit.


It also contains other important nutrients too.


A vegetable which contains iron is spinach. It is iron rich


vegetable. It contains 3.6mg of iron


Iron is a metal.


(ii) Iron sulphate:



Formula: Fe2(SO4)2 or FeSO4


(iii) Iron is present in haemoglobin (in blood) which acts as oxygen carrier in our body. It is an important nutrient for our body


Deficiency of iron leads to may problems. It can cause anaemia, shortness of breath, tiredness, headache or migraine. Hence, it must be a part of our diet.


More from this chapter

All 75 →
32

Calculate the number of molecules in 88 g of this gas sample.

[Given, atomic masses of C = 12 u, O = 16 u, NA = 6.022 × 1023 per mole]

 33

Jyoti buys a gold jewellery which has 90% gold and the rest copper. She is given a bill which charges amount equivalent to 100% of gold. She argues with seller about the discrepancy, who settles the bill accordingly.

(i) What is the ratio of gold and copper in the jewellery?


(ii) How many atoms of gold are present in 1g of it?


(iii) What are the values displayed by Jyoti?

 35

Mr. Seema taught mole concept to the students of class IX and asked the students to revise whatever had been taught. In the next period, she divided the class into several groups and asked each member of each group to explain what they have understood to the other members of their group.

Afreen a member of one of the group started to explain mole concept to the other members of her group as follow. Number of moles of molecules is equal to its mass and it is also equal to the Avogadro’s number.


Read the above passage and answer the following questions.


(i) Comment on Afreen’s understanding of mole concepts. What modification do her statement need?


(ii) What is the unit of Avogadro’s number?


(iii) What are the value displayed by Mrs. Seema?

 1

Antacid are prescribed during acidity. Commercially available antacids consist of magnesium hydroxide [Mg(OH)2], sugar and flavouring agents. The magnesium hydroxide act as base and form salt and water on reaction with hydrochloric acid of the stomach. The mass of salt and water formed is equal to the combined mass of