11 The red colour of blood is due to
Haemoglobin
12 Blood do not get the normal amount of haemoglobin when our food is deficient in
Iron
13 Soap is made by
Boiling fats and oil with an alkali
14 In human body, urine is store in
Bladder
15 Bladder receive urines from
Kidneys
16 Eugenics deals with the production of fine offspring of
Human beings
17 The minimum velocity needed for a body to escape from the gravity of earth is called
Escape velocity
18 Escape velocity of earth is
11.2 KM/S
19 The speed of light in a dense medium
Decreases
20 When a beam of light passes from air into water, its speed
Decreases
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