Science Class 10 chapter 1 chemical reactions and equations
Authored by jayanta sahu
Science
10th Grade
NGSS covered
Used 1K+ times
AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A chemical reaction has taken place in which of the following process?
(i) Ice melts into water
(ii) A wet shirt got dried in sunlight
(iii) A brown layer is formed over iron rod kept in air
(iv) Sugar getting dissolved in water
Tags
NGSS.HS-PS1-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 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
3.
MULTIPLE CHOICE QUESTION
30 sec • 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.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Write values of a,b and c if following chemical reaction is balanced .
aMg + bO2 → cMgO
(i) a=2, b=1, c=2
(ii) a=1, b=1, c=2
(iii) a=2, b=1, c=1
(iv) a=2, b=2, c=2
Tags
NGSS.HS-PS1-7
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following reactions satisfies this condition? :
Iron nails kept with dilute sulphuric acid and ferric sulphite solution is formed and hydrogen gas is released.
(i) 2Fe(s) + 3H2 SO4(l)→ Fe2 (SO4)3(l) + 3H2(g)
(ii) 2Fe(s) + 2H2SO4(aq) → Fe2(SO4)3(s) + 4H2 (g)
(iii) 2Fe(s) + 2H2SO4 (aq) → 3Fe2(SO4)3(aq) + 2H2(g)
(iv) 2Fe(s)+3H2SO4 (aq) → Fe2(SO4)3 (aq) + 3H2 (g)
Tags
NGSS.HS-PS1-2
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
30 sec • 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.HS-PS1-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
On thermal decomposition of lead nitrate, nitrogen dioxide gas is evolved. How it presence can be verified?
(i) It will turn lime water milky
(ii) Rotten egg odour
(iii) Brown fumes can be observed
(iv) Reddish fume is observed
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports
Continue with Google
Continue with Email
Continue with Classlink
Continue with Clever
or continue with
Microsoft
%20(1).png)
Apple
Others
Already have an account?
