Question

Mar Marka 60
Meta Alquimere ampulety
0 Classit the following into elements, compounds and mixtures
fe) Bochum
(h) 801
re) Sugar solution
(d) Bilver
(e) Tin
Q2 Wich separation techniques will you apply for the seperation of the following.
(a) Oil from water
(b) Tea leaves from lea
(c) Iron pins from sand (d) Wheatgrains from husk
(e) Butter from curd
Q.3 Give the five example of chemical and physical changes.
10
6
Q.4 Write the chemical formulae of the following.
(1) Calcium oxide
(2) Copper nitrate
(3) Calcium carborate
Q.5
12
Convert the following temperatures to Celsius or kelvin scale.
(a) 470K
(b) 300K
(c) 100°C .
(d) 25
2.6 Answer the following question :-(any four)
(1) What are the charactristics of the particle of matter?
(2) Explain the following withe examples (any-2)
(a) Colloid
(b) Pure substance
(c) Suspension
(3) Calculate the molecular masses. (any-2)
(a) Co.
(b)CH,
(c)
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(4) Differentiate between homogeneous and haterogenous mixture withe examples
(5) Why does a desert cooler cool better on a hot dry day?​

Answer 1

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