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1
________________ is the shorthand form of representing a chemical reaction using symbols and formula.
Chemical equation
Physical equation
Both physical and chemical
None of these .
2
_______________ is a characteristics of chemical reaction .
Evolution of gas
Change in pressure
Change in volume
3
Which of the following is not a type of chemical reaction ?
Displacement reaction
Decomposition reaction
Combination reaction
Resistance reaction
4
In a chemical equation names of the ____________________ are written on the left hand side .
Products
Reactants
Substance
5
The element/compounds involved in the chemical reaction are called _________________ .
6
Which of the following hypothetical reactions can be called a combination reaction?
a+bcab+c
abcab+c
a+b ab
ab a+b
7
Corrosion of which of the following metals is most serious problem?
Copper
Silver
Iron
Gold
8
The reaction is a
Double displacement reaction
9
Change of milk to curd is a :
Physical change
Chemical change
Both A and B
Neither A and B
10
Match the items of Column I with the items of Column II and choose the correct answer using the codes given below.
A - iii, B - ii, C - iv, D - i
A - iv B - i, C - ii, D - iii
A - iii, B - i, C - iv, D - ii
A - iv, B - ii, C - iii, D - i
11
Which of the following are correct ?
(a) Change in color is the characteristics of chemical reaction .
(b) Change in volume is the characteristics of reaction .
Only (a) is correct .
Only (b) is correct .
Both (a) and (b) is correct .
12
Which is the best method to prevent rusting?
Painting
Greasing
Galvanisation
Precipitation
13
(a) A Chemical Equations is the shorthand form of representing a chemical reaction using symbols and formula.
(b) The element/compounds involved in the reaction are called products and the new elements/compounds formed are called the reactants.
Both (a) and (b) is correct.
14
(a) A chemical reaction in which two or more substances (reactants) combine to form a new substance ( product) is called combination reaction.
(b) Combinations reaction is example of
(c) Combination of nitrogen and hydrogen gas yields ammonia gas.
Only (a) and (b) is correct
Only (b) and (c) is correct .
Only (a) and (c) is correct .
All of these .
15