Question

Section C

Q 20. A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity.

Q21.A truck starts from rest and rolls down a hill with a constant acceleration. It travels a distance of

400 m in 20 s. find its acceleration. Find the force acting on it if its mass is 7 metric tonnes.

Q22. Give the names of the elements present in the following compounds:

a) Quick lime

b) Hydrogen bromide

c) Baking powder.

Q23. Write the chemical formula of:

a) Magnesium chloride

b) Calcium oxide

c) Calcium carbonate.

Q24 Classify the following in to elements compounds and mixtures:

a) Sodium

b) Soil

c) Calcium carbonate.

Q25 Differentiate between Acute diseases and Chronic diseases

Q26 Describe location, function of meristematic tissue.

Q27. Describe diseases caused by viruses and explain in detail precautions taken by us against

covid 19
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Answer 1

Answer:

Q22: A) Cao

B) HBr

C) NaHCO3

Q23: A) MgCo3

B) CaO

C) CaCo3