Download App

Science Assertion & Reason

Periodic Classification of Elements · Tamil Nadu Board STD 10 (Tamil - English Medium). 15 questions.

Questions

Assertion & Reason

🎯

Test yourself on this topic

15 questions · timed · auto-graded

MCQ 11 Mark
Assertion (A): Electroplating method not only protects but also enhances the metallic appearance.
Reason (R): Electroplating is a method of coating one metal with another by passing current.
  • A
    (A) is right, (R) is wrong
  • B
    (A) is right, (R) is not relevant
  • ✓
    (A) is right, (R) is relevant
  • D
    Both (A) and (R) are wrong.
Answer
Correct option: C.
(A) is right, (R) is relevant
(c) (A) is right, (R) is relevant
View full question & answer→
MCQ 21 Mark
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
View full question & answer→
MCQ 31 Mark
Assertion (A): Nickel steel is used in making cables, aircraft parts and propeller.
Reason (R): Nickel steel alloy is hard, brittle and polishable.
  • A
    Both (A) and (R) are correct
  • B
    Both (A) and (R) are not correct
  • ✓
    (A) is correct but (R) is wrong
  • D
    (A) is wrong but (R) is correct.
Answer
Correct option: C.
(A) is correct but (R) is wrong
(c) (A) is correct but (R) is wrong
View full question & answer→
MCQ 41 Mark
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.
  • ✓
    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
View full question & answer→
MCQ 51 Mark
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.
  • A
    Both (A) and (R) are correct
  • B
    (A) is correct but (R) is wrong
  • C
    (A) is wrong but (R) is correct
  • ✓
    Both (A) and (R) are wrong.
Answer
Correct option: D.
Both (A) and (R) are wrong.
(d) Both (A) and (R) are wrong
View full question & answer→
MCQ 61 Mark
Assertion (A): In the aluminothermic process, Iron oxide is reduced to iron by igniting with Aluminium powder.
Reason (R): Aluminium is a powerful reducing agent.
  • A
    Both (A) and (R) are wrong
  • B
    (A) is correct but (R) is wrong
  • C
    (A) is wrong but (R) is correct
  • ✓
    Both (A) and (R) are correct.
Answer
Correct option: D.
Both (A) and (R) are correct.
(d) Both (A) and (R) are correct
View full question & answer→
MCQ 71 Mark
Assertion (A): Aluminium occurs in the combined state.
Reason (R): It is a reactive metal and so it occurs in combined state.
  • ✓
    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
View full question & answer→
MCQ 81 Mark
Assertion (A): Gold, Silver and Platinum are the metals that are found in a free state.
Reason (R): Those metals have low chemical reactivity and are found in a free state or in the native state.

  • A
    Both (A) and (R) are correct
  • ✓
    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: B.
Both (A) and (R) are not correct
(b) Both (A) and (R) are correct
View full question & answer→
MCQ 91 Mark
Assertion (A): Metals like Titanium, Chromium, Manganese and Zirconium are called strategic metals!
Reason (R): They find their applications in the manufacturing of defence equipment.

  • ✓
    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
View full question & answer→
MCQ 101 Mark
Assertion (A): Copper, Silver and Gold are used in making coins and jewellery. So they are called coinage metals.
Reason (R): These metals release an enormous amount of nuclear energy.

  • A
    Both (A) and (R) are correct
  • B
    Both (A) and (R) are not correct
  • ✓
    (A) is correct but (R) is wrong
  • D
    (A) is wrong but (R) is correct.
Answer
Correct option: C.
(A) is correct but (R) is wrong
(c) (A) is correct but (R) is wrong
View full question & answer→
MCQ 111 Mark
Assertion (A): The chemical properties of the elements in the same period are not similar.
Reason (R): As the electronic configuration changes across the period, the chemical properties of the elements are not similar.

  • ✓
    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
View full question & answer→
MCQ 121 Mark
Assertion (A): Corundum is a chief ore of aluminium.
Reason (R): Molecular formula of Corundum is $Al _2 O _3$
  • A
    (A) and (R) are correct, (R) explains the (A)
  • B
    (A) is correct, (R) is wrong
  • ✓
    (A) is wrong, (R) is correct
  • D
    (A) and (R) are correct, (R) doesn’t explain (A)
Answer
Correct option: C.
(A) is wrong, (R) is correct
(c) (A) is wrong, (R) is correct
View full question & answer→
MCQ 131 Mark
Assertion (A): Haematite ore was purified by Hydraulic method.
Reason (R): Haematite is oxide ore.

  • ✓
    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
View full question & answer→
MCQ 141 Mark
Assertion (A): The nature of bond in NaI molecule is covalent.
Reason (R): The electronegativity difference between Na and I is 1.5

  • ✓
    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
View full question & answer→
MCQ 151 Mark
Assertion (A): Nobel gas is unreactive.
Reason (R): They have unstable electronic configuration in their valence shells.

  • A
    Both (A) and (R) are correct
  • B
    Both (A) and (R) are not correct
  • ✓
    (A) is correct but (R) is wrong
  • D
    (A) is wrong but (R) is correct.
Answer
Correct option: C.
(A) is correct but (R) is wrong
(c) (A) is correct but (R) is wrong
View full question & answer→
Generate Paper FreeAll Periodic Classification of Elements topics
Assertion & Reason - Science STD 10 Questions - Vidyadip