Download App

Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
MCQ
For two statements are given-one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below:
Assertion: $AgBr$ is used on photographic and $X-$ray film.
Reason: $AgBr$ is photosensitive and changes to $Ag$ and bromine in presence of sunlight and undergoes decomposition reaction.
  • ✓
    Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
  • B
    Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
  • C
    $A$ is true, but $R$ is false.
  • D
    $A$ is false, but $R$ is true.
✓

Answer

Correct option: A.
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
$\ce{AgBr}$ is a chemical compound. It is widely used in photography as photographic emulsions.
$\ce{2AgBr \rightarrow 2Ag + Br_2}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion - Reasoning (1 Marks)" from Chemical Reactions and Equations→Chemical Reactions and Equations — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Decomposers help in recycling of nutrients between living and non $-$ living components of ecosystem.
Reason : Decomposers help in decomposing dead bodies of organisms and return various nutrient elements to their source viz soil, water and air.
→
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : A plane mirror neither converges parallel rays of light nor diverges them.
Reason : The focal length of a plane mirror can be considered to be infinite.
→
Assertion (A): Copper spoon is used to stir silver nitrate solution.
Reason (R): Copper is less reactive than silver
→
For question two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Acetic acid does not act as an acid in benzene solution.
Reason : Benzene is non $-$ polar.
→
Assertion (A): Corrosion of iron is commonly known as rusting.
Reason (R): Corrosion of iron occurs in presence of moist air.
→
Assertion (A): Deflection of the iron filings changes when current in the conductor varies.
Reason (R): Magnitude of the magnetic field does not change with the magnitude of current.
→
Assertion (A): Two bar magnets attract when they are brought near to each other with the same pole.
Reason (R): Unlike poles will attract each other.
→
In the followin questions, a statement of Assertion is given by to corresponding statement of Reason. Of the statement mark the correct answer as :
Assertion : In an $AC$ generator slip $-$ rings type of commutator is used.
Reason : Slip $-$ rings are full rings with which the ends of coil are in contact.
→
For question two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Calcium sulphate hemihydrate, $\text{CaSO}_4.\frac{1}{2}\text{H}_2\text{O}$ is called plaster of Paris.
Reason : Plaster of Paris is used for producing moulds for pottery and ceramics and casts of statues.
→
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below:
Assertion : Exposure of silver chloride to sunlight for a long duration turns gray due to the formation of silver by decomposition of silver chloride.
Reason : ln this process, sublimation of silver chloride takes place.
→