METALS AND NON-METALS

Define Sonorisity?

What is Physical state of elements?

Write Reaction with water?

Physical propeties of metal

what is Reducing nature of metals?

define Malleability of metals.

What is Ductility of metals.

Heat conductivity.

Define lustre of metals with example.

 Describe Hardness.

Define Lustre.

What is Electrical conductivity in metals ? 

Fill in the blanks to complete the following paragraph.
The name of the product formed in the reaction of sulphur and
_____________ is sulphur dioxide gas. When sulphur dioxide is
dissolved in_________________, sulphurous acid is formed. The
sulphurous acid turns _____________ litmus paper to ____________.
Generally oxides of __________ are acidic in nature.
After completing the paragraph write two questions which you
can raise on the basis of this information.

Iron is more reactive than copper. Can you write an activity to
show this?

Some of the following statements are incorrect. Find the incorrect
statements and correct them.
(a) The property of metals by virtue of which they can be drawn
into wires is called ductility.
(b) Metals are good conductor of electricity but poor conductor
of heat.
(c) Articles made of metals produce ringing sound when struck
hard.
(d) Oxides of non-metals and metals are acidic in nature.
(e) A less reactive metal replaces a more reactive metal from its
salt solution in water.

A doctor prescribed a tablet to a patient suffering from iron
deficiency. The tablet does not look like iron. Explain.

Paheli prepared a blue coloured solution of copper sulphate in
beaker A and placed an iron nail in it. Boojho prepared a yellowish
green solution of ferrous sulphate in beaker B and placed a copper
wire in it. What changes will they observe in the two beakers
after an hour?

Paheli bought a statue made of copper. To her surprise it acquired
a dull green coating after a couple of months. Explain the reason.

Which of the following metals can displace the other two metals
from their salt solutions?

zinc, iron, copper

Which liquid metal is used for making thermometers?

Why are bells made of metals?

Zinc sulphate forms a colourless solution in water. Will you
observe any colour on adding copper turning in it?

A purple coloured non-metal forms a brown solution in alcohol
which is applied on wounds as an antiseptic. Name the nonmetal.

Which non-metal is used to disinfect water?

Name two major non-metals which are present in fertilisers and
enhance the growth of plants.

Which non-metal is essential for our life and all living beings
inhale it during breathing?

Name two soft metals which can be cut with a knife.

Can you store lemon pickle in an aluminium utensil? Explain.

Give reasons for the following.

(a) Aluminium foils are used to wrap food items.

(b) Immersion rods for heating liquids are made up of metallic substances.

(c) Copper cannot displace zinc from its salt solution.

(d) Sodium and potassium are stored in kerosene.

Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties.

Mark 'T' if the statement is true and 'F' if it is false.

(a) Generally, non-metals react with acids. ( )

(b) Sodium is a very reactive metal. ( )

(c) Copper displaces zinc from zinc sulphate solution. ( )

(d) Coal can be drawn into wires. ( )

Fill in the blanks:

(a) Phosphorus is a very _________non-metal.

(b) Metals are ________ conductors of heat and _________.

(c) Iron is ________reactive than copper.

(d) Metals react with acids to produce _________gas.

Which of the following statements is correct?

(a) All metals are ductile.

(b) All non-metals are ductile.

(c) Generally, metals are ductile.

(d) Some non-metals are ductile.

Which of the following can be beaten into thin sheets?

(a) Zinc (b) Phosphorus (c) Sulphur (d) Oxygen

 One day Reeta went to a jeweller's shop with her mother. Her mother gave an old gold jewellery to the goldsmith to polish. Next day when they brought the jewellery back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss in weight?

Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.