Question

ATTEMPT ALL QUESTIONS
[IX 5 = 53
Q1. Write the symbol of the following elements
Nitrogen
Argon
Chlorine
(d) Magnesium
Helium
[IX 5 = 5)
Q2. Name the method used for the separation of the following mixtures
Sand and ammonium chloride
(b)
Salt from sea water
(c)
Sand and salt
(d) Pure water from tap water
Rice and husk
[1X 55)
Q3. Give one example of each of the following mixtures:
Solid - liquid heterogeneous mixture
Solid-gas heterogeneous mixture
(c) Liquid-liquid heterogeneous mixture
(d) Solid-solid homogeneous mixture
Liquid-gas homogeneous mixture
[1X5 - 5)
04 Give one use of each of the following
Gold
(b) Brass
Iron
Coal
Diamond
[2X5 = 10)
OS Differentiate between the following by giving one point only
Metals and non-metals
(b) Pure and impure substance
Compound and Mixture
Solute and solvent
Homogeneous and Heterogeneous mixture
11X55
Q6. Define the following terms
Evaporation
Sublimation
(c)
Alloy
Solution
(e) Decantation
[2X5= 10)
07. Give reason Why?
Magnet is used to separate a mixture of Iron and sulphur
(b) Argon is filled in electric bulbs
(c) A frying pan is made up of steel but its handle is made up of wood
Graphite is used to make lead of pencils
Alum is used in purification of river water
12x 5 - 10)
08. Answer the following questions
Why is the separation of constituents of mixture necessary
Why gold, silver and platinum is used to make jewellery
Why is copper used to make utensils and electnc wires
Why is water a compound and air a mixture
Why boiled water taste flat?
1% X10-5)
09. Give one word
A substance insoluble in water
A substance which can sublime
A universal solvent
A substance soluble in water
The solid which is left on the filter paper ate filtration
An important substance used in our food to add taste and so on
Am alloy used to make crafts
The most abundant elements in the universe
A non metalliquid at room temperature
0 A metal which is bride and on beating it breaks into proces​

Answer 1

Answer:

Nitrogen = N, Argon = Ar, chlorine = Cl, Mg , He,..

Answer 2

Answer:

massage me on whatapp now ok I 9389974682