Download App

Periodic Classification of Elements — Science STD 10 — Question

Tamilnadu BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
Assertion (A): Magnesium is used in a sacrificial protection method to prevent corrosion.
Reason (R): Magnesium is more reactive than iron. When it is coated on the articles made of steel, it sacrifices itself to protect steel.
  • ✓
    Both (A) and (R) are correct
  • B
    Both (A) and (R) are not correct
  • C
    (A) is correct but (R) is wrong
  • D
    (A) is wrong but (R) is correct.
✓

Answer

Correct option: A.
Both (A) and (R) are correct
(a) Both (A) and (R) are correct

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 & Reason" from Periodic Classification of Elements→Periodic Classification of Elements — all question types→Science STD 10 question papers→Tamilnadu Board STD 10 question papers→Tamilnadu Board question paper generator→

Similar questions

Assertion (A): Corundum is a chief ore of aluminium.
Reason (R): Molecular formula of Corundum is $Al _2 O _3$
→
Assertion: Among the alpha, beta and gamma-ray a particle has maximum penetrating power. Reason: The alpha particle is heavier than beta and gamma rays.
(a) If both the assertion and the reason are true and the reason is the correct explanation of the assertion.
(b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
(c) If Assertion is true, but the reason is false.
(d) If Assertion is false, but the reason is true.
(e) If the Assertion and reason both are false
→
Assertion (A): The atomicity of ozone is three.
Reason (R): 1 molecule of ozone contains 3 atoms of oxygen.
(a) Both (A) and (R) are correct
(b) Both (A) and(R) are wrong
(c) (A) is correct but (R) is wrong
(d) (A) is wrong but (R) is correct.
→
Assertion (A): The nature of bond in NaI molecule is covalent.
Reason (R): The electronegativity difference between Na and I is 1.5

→
Assertion: Colours can be scan in thin layers of oil on the surface water. Reason: White light is composed of several colours.
→
Assertion (A): $NH _3, H _2 O , HCl$ are heteroatomic molecules.
Reason $( R )$ : The molecule that consists of atoms of different elements is called heteroatomic molecules.
→
Assertion (A): Duralumin is used in making aircraft, tools and pressure cookers.
Reason (R): Duralumin is an alloy that is light, strong, resistant to corrosion.
→
Assertion (A): When iron is dipped in conc. $HNO _3$ it becomes chemically inert (or) passive.
Reason (R): Iron becomes passive when treated with nitric acid is due to the formation of a layer of iron oxide $Fe _3 O _4$ on its surface.
→
Assertion (A): Nickel steel is used in making cables, aircraft parts and propeller.
Reason (R): Nickel steel alloy is hard, brittle and polishable.
→
Assertion: Artificial radioactivity is a controlled process.
Reason: It is a spontaneous process – natural radioactivity.
→