Unit II ( 2020-21 )
Std- VII Subject- Chemistry M:M-20
Q1-Write
true or false against each statement:5m
i.
Sodium
metal is stored under water.
ii.
Bromine
is the only liquid metal.
iii.
Oxygen
gas is used to preserve food.
iv.
The
reactants are written on the left hand side of the reaction.
v.
Formation
of a precipitate is indicated by an upward arrow.
Q2-Fill in the blanks with the suitable words- 5m
i.
In
the preparation of ammonia, iron is used as…………….......
ii.
Diamond
is a form of……………..
iii.
Metals
make a……………. sound on being struck.
iv.
Water
break down into its constituents hydrogen and……….
v.
Metallic
oxides are generally…………….. in nature.
Q3-Choose
the correct option- 5m
i.
Which
of these is the most ductile metal?
a.
Sodium b. Gold
ii.
Which
of the following substance is brittle?
a.
Sulphur
b. Copper
iii.
A
chemical reaction is-
a.
Temporary b.Permanent
iv.
The
formula of sodium chloride is-
a.
NaClb.
HCl
v.
A
metal which violently reacts with water-
a.
Sodiumb.
Aluminum
Q4- Give
one word for the following-
5m
i.
A
homogeneous mixture of two or more metals and nonmetals ._____
ii.
Ability
to be hammered into thin sheets.________
iii.
A
new substance formed in a chemical reaction.________
iv.
Ability
to be drawn into thin wires.___________
v.
When
metal tracts with oxygen it forms.__________
