chemical reactions and equations
Quiz
•
Chemistry
•
10th Grade
•
Medium
+1
Standards-aligned

Shlok Gupta
Used 486+ times
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
when does a chemical reaction take place ?
when a physical change occurs
when a chemical change occurs
both a and b
none of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the substances on the left side called and right side of the chemical equation called respectively ?
products and reactants
groups and electrons
nothing
reactants and products
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not a physical change?
(a) Boiling of water to give water vapour
(b) Melting of ice to give water
(c) Dissolution of salt in water
(d) Combustion of Liquefied Petroleum Gas (LPG)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements about the given reaction are correct?
3Fe(s) + 4H2O(g) => Fe3O4(s) + 4H2(g)
(i) Iron metal is getting oxidised
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as oxidising agent
(a) (i), (ii) and (iii)
(b) (iii) and (iv)
(c) (i), (ii) and (iv)
(d) (ii) and (iv)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
which of the following observations helps to determine that a chemical reaction has taken place ?
change in state
change in color
change in temperature
all of the above
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A solution of X is used for white washing walls. it reacts slowly with Y in air to form a thin layer of B on walls which gives walls a shiny finish. which of the following options correctly represents X,Y and B ?
X =slaked lime , Y = nitrogen , B=calcium oxide
X =Calcium Hydroxide, Y=Oxygen, B = Calcium carbonate
X= slaked lime, Y=Carbon oxide,B= calcium chloride
X= slaked lime,Y=Carbon dioxide,B=Calcium carbonate
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the process that is happening in this image ? And also give the name of the two gas that are present in two test tubes and the ratio they(gases) are present in .
process= thermal decomposition,
gases present=hydrogen,carbon dioxide, ratio=2:1
process=corrosion,
gases present=oxygen,hydroxide, ratio=2:1
process=electrolysis of hydrogen polyoxide
gases present=hydrogen,oxygen, ratio=2:1
process=electrolysis of water
gases present=hydrogen,oxygen,ratio=4:2
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