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 $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Magnesium ribbon keeps on burning in atmosphere of nitrogen.
Reason : Magnesium reacts with nitrogen to form magnesium nitride and this reaction is combination 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.

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

Similar questions

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Larynx passes air to the pharynx.
Reason : Pharynx produces sound.
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Thyroxine is secreted by thyroid gland.
Reason : Its deficiency leads to diabetes.
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 : The light of violet colour deviates the most and the light of red colour the least, while passing through a prism.
Reason : For a prism material, refractive index is highest for red light and lowest for the violet light.
Assertion (A): Stannous chloride is a powerful oxidising agent which oxidises mercuric chloride to mercury.
Reason (R): Stannous chloride gives a grey precipitate with mercuric chloride, but stannic chloride does not do so
Assertion (A): On adding dil. HCI to a test tube containing a substance 'X', a colourless gas is produced which gives a pop sound when a burning match stick is brought near it.
Reason (R): In this reaction metal 'X' is displaced by Hydrogen.
In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Solar cells are used to convert solar energy into electrical energy.
Reason : The radiant heat present in solar energy does not change into electrical energy.
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 : To avoid risk of electrical shock, the metal body of electric appliances is earthed.
Reason : Earthing saves us from electrical shocks.
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 : An electric current produced in a closed circuit by changing magnetic field is called induced current.
Reason : The direction of induced current is given by Fleming's right hand rule.
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 : Internal fertilisation occurs in mammals and birds.
Reason : External fertilisation occurs in reptiles, amphibians and fishes.
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 : No net force acts on a rectangular coil carrying a steady current when suspended freely in a uniform magnetic field.
Reason : Forces acting on each pair of the opposite sides of the coil are equal and opposite.