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Balaji Test

The document consists of a series of questions related to chemistry, biology, and physics, covering topics such as chemical reactions, respiration, electrolysis, blood vessels, digestion, and optics. It includes specific inquiries about reactions, equations, and biological processes, as well as practical applications of scientific principles. The questions are designed to test knowledge and understanding of fundamental concepts in these subjects.

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amitkumat1231231
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59 views2 pages

Balaji Test

The document consists of a series of questions related to chemistry, biology, and physics, covering topics such as chemical reactions, respiration, electrolysis, blood vessels, digestion, and optics. It includes specific inquiries about reactions, equations, and biological processes, as well as practical applications of scientific principles. The questions are designed to test knowledge and understanding of fundamental concepts in these subjects.

Uploaded by

amitkumat1231231
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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OM BALAJI ACADEMY TEST

Phone no: - 8802758768

1. Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of
barium sulphate.
2. Why is respiration considered an exothermic reaction? Explain.
3. Give one example of each:
(a) Chemical reaction showing evolution of gas.
(b) Change in colour of a substance during a chemical reaction.
(c) Chemical reaction showing change in temperature.
4. In electrolysis of water:
(a) Name the gas collected at cathode and anode respectively.
(b) Why is volume of one gas collected at one electrode is double of another?
(c) Why is it necessary to add few drops of dil. H2SO4 to water before electrolysis?
5. White wash was being done at Mukesh's house. Mukesh saw that the painter added quick lime to
drum having water. Mukesh touched outer surface of drum; it was unbelievably hot.
(a) Write the chemical equation for above reaction.
(b) What type of reaction is it?
(c) This reaction is exothermic or endothermic. Justify your answer.
6. Write down the balanced chemical equation for the following:
(a) Silver chloride is decomposed in presence of sunlight to give silver and chlorine gas.
(b) Calcium oxide reacts with water to give lime water.
(c) Sodium hydroxide reacts with hydrochloric acid to give sodium chloride and water.
(d) Dil. hydrochloric acid is added to copper oxide to give green coloured copper chloride and
water.
(e) Solution of barium chloride and sodium sulphate in water reacts to give insoluble Barium
sulphate and solution of Sodium chloride.
7. (i)Write three types of blood vessels. Give one important feature of each
(ii)How are CO2 and O2 transported in human beings?
8. Write the function of the following in the human alimentary canal.
(i) Saliva (ii) HCl in Stomach (iii) Bile juice (iv) Villi
9. Write one function of each of the following enzymes.
i) Pepsin ii) Lipase
10. Draw a well labelled diagram of Nephron. Explain the process of formation of urine in the human
kidney.
11. Explain the three pathways of breakdown of glucose in living organisms.
12. How is small intestine designed to absorb digested food.
13. Describe the process of double circulation in human beings.
14. Name the type of mirror used in the following situations.
(a) Headlights of a car. (b) Side/rear-view mirror of a vehicle. (c) Solar furnace.
15. An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the
position and nature of the image.
16. The magnification produced by a plane mirror is +1. What does this mean?
17. An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of
curvature 30 cm. Find the position of the image, its nature and size.

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