Download App

Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals3 Marks
Question
State two ways to prevent the rusting of iron.
✓

Answer

Two ways to prevent the rusting of iron are:
→ Oiling, greasing, or painting: By applying oil, grease, or paint, the surface becomes water proof and the moisture and oxygen present in the air cannot come into direct contact with iron. Hence, rusting is prevented.
→ Galvanisation: An iron article is coated with a layer of zinc metal, which prevents the iron to come in contact with oxygen and moisture. Hence, rusting is prevented.

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 "[3 Mark Questions]" from Metals and Non-Metals→Metals and Non-Metals — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

State what would happen to the direction of rotation of a motor if:
  1. The current were reversed.
  2. The magnetic field were reversed.
  3. Both current and magnetic field were reversed simultaneously.
→
What do you mean by a precipitation reaction? Explain by giving examples.
→
The following is a food chain that ends with human:
plants → bee → human
  1. Explain how plants provide food for bees.
  2. How do bees provide food for humans?
  3. How does this food chain differ form a usual food chain involving human such as : plants → goat → human?
  4. Do you think that the food chain given in this question can really be regarded as a food chain? Explain your answer.
→
Differentiate between inherited and acquired characters. Give one example for each type.
→
Describe the working of a hydrogen bomb.
→
A wire of given material having length l and area of cross-section A, has a resistance of $2\Omega$. Find the resistance of another wire of same material having length 2l and are of cross-section
$\frac{\text{A}}{2}$.
→
Is the position of a star as seen by us its true position? Justify your answer.
→
Explain why, a solution of cane sugar does not conduct electricity but a solution of common salt is a good conductor of electricity.
→
A domestic lighting circuit has a fuse of 5A. If the mains supply is at 230V, calculate the maximum number of 36W tube-lights that can be safely used in this circuit.
→
A boy uses spectacles of focal length -60cm. Name the defect of vision he is suffering from. Which lens is used for the correction of this defect? Compute the power this lens.
→