Chemistry Reactions
Authored by Lisa Thompson
Science
10th Grade
NGSS covered
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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A chemical reaction has taken place can be represented by which of the following condition?
(i) Evolution of gas
(ii) Heat released
(iii) Change in color
(iv) All the above
Tags
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A chemical equation is said to be balanced if number of
(i) Compounds are same in both side
(ii) Molecules are same in both side
(iii) Number of atoms is same in both side
(iv) Number of electrons are same in both side
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Write values of a,b and c if following chemical reaction is balanced . aMg + bO2 → cMgO
a=2, b=1, c=2
a=1, b=1, c=2
a=2, b=1, c=1
a=2, b=2, c=2
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Calcium oxide reacts with water to form calcium Hydroxide. Which type of reaction is this?
(i) Combination and endothermic reaction
(ii) Combination and exothermic reaction
(iii) Decomposition and Endothermic reaction
(iv) Decomposition and exothermic reaction
Tags
NGSS.MS-PS1-4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
On thermal decomposition of lead nitrate, nitrogen dioxide gas is evolved. How it presence can be verified?
It will turn lime water milky
Rotten egg odour
Brown fumes can be observed
Reddish fume is observed
Tags
NGSS.MS-PS1-2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements about the given reaction are correct?3Fe (s) + 4H2O (g) → Fe3O4 (s) + 4 H2 (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
(i), (ii) and (iii)
(ii) and (iv)
(i), (ii) and (iv)
(ii) and (iv)
Tags
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Three beakers labelled as A, B and C each containing 25 ml of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solution contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is (are) correct?(i) In beakers A and B, exothermic process has occurred.(ii) In beakers A and B, endothermic process has occuBftd.(iii) In beaker C exothermic process has occurred.(iv) In beaker C endothermic process has occurred.
(i) only
(ii) only
(i) and (iv)
(iv), (ii) and (iii)
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-4
NGSS.MS-PS3-4
NGSS.MS-PS3-5
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