Q.1. Neutralization is a reaction between:- (a) Two acids
(c) One acid and one base
Q.2.Villi are located in the:- (a) Small intestine
(c) Stomach
Q.3. Milk of magnesia is used as antacid because:- (a) It is acidic
(c) It is basic
Q.4.
(b) Two Bases
(d) One acid and one neutral substance
(b) Large intestine (d) None of these
(b) It is neutral
(d) All of the above
( (
The false feet of Amoeba are used for:-
(a) Movement only (b) Capture of food only
(c) Capture of food and movement
(
d) Exchange of gases only
Q.5. Colours of phenolphthalein indicator in acidic and basic medium respectively are:-
(a) Pink and colourless
b) Colourless and pink
(c) Blue and red
d) Red and blue. ( (
(
Q.6. Which is not digested by human?
(a) Protein
(c) Glucose
Q.8. The acid that our stomach releases is:-
SECTION B [10 marks] Answer the following questions:-
Q.11. Name the secretion of liver. Where is it stored? (2) Q.12. Write the common name and formula of the following salts :- (2) (a) Sodium carbonate (b) Acetic acid
Q.13. Label any three in the following figure of the human digestive system :- (3)
Q.14. (a) Which chemical is found in ant sting?
(b) State two differences between acids and bases. (3)
b) Fats
d) Cellulose
Q.7. Calcium hydroxide is found in:-
(a) Window cleaner
b) Lime water
(c) Soap
(d) Lime juice
(a) Sulphuric acid (b) Nitric acid
(c) Hydrochloric acid (d) Formic acid
Q.9. If the soil is too basic, it is treated with:-
(a) Organic matter (b) Quicklime
(c) Salt (d) Water
Q.10. Water from the undigested food is absorbed mainly in the:-
(a) Stomach (b) Food pipe
(c) Small intestine (d) Large intestine
Answers
Answer:
1. a
2. c
3.a .4.d
5. @
6. b
7. b
8. c
9. d
10 .a
1,option c
2,option a
3,option c
4,option c
5,option a
6,option d
7,option b
8,option a
9,option a
10 , option d
11,Bile is a fluid that is made and released by the liver and stored in the gallbladder.
12 , washing soda, Na₂CO
b, Acetic acid , systematically named ethanoic acid , is an acidic, colourless liquid and organic compound with the chemical formula CH3COOH (also written as CH3CO2H, C2H4O2, or HC2H3O2).
13,
i). Food is crushed and cut in the mouth with the help of teeth and is mixed with saliva that is secreted by three salivary glands(one below the tongue and two at the side of the jaw) to make it wet and slippery, this process is known as mastication.
(ii) Saliva contains amylase that breaks down complex carbohydrates and the tongue helps in pushing the food to the next part of the alimentary canal.
(iii) The soft food then passes through the oeso