Download App

Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
MCQ
Which one of the following processes involve chemical reactions?
  • A
    Storing of oxygen gas under pressure in a gas cylinder.
  • B
    Liquefaction of air.
  • C
    Keeping petrol in a china dish in the open.
  • ✓
    Heating copper wire in presence of air at high temperature.
✓

Answer

Correct option: D.
Heating copper wire in presence of air at high temperature.
Chemical changes involve formation of new compounds from one of more substances. Reaction of copper wire with oxygen forms copper oxide.

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 "M.C.Q" 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

Which of the following burns by producing a yellow, luminous flame?
→
The blood leaving the tissues becomes richer in :
→
Choose the incorrect statement :
→
The slag obtained during the extraction of copper pyrites is composed mainly of :
→
The source of energy of the sun is :
→
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
→
An element $X$ belongs to group $2$ and period $3$ of the periodic table. The chemical formulae of its nitrate, sulphate and phosphate respectively will be.
→
The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to.
→
One of the following controls the peristaltic movements of alimentary canal. This one is :
→
The micro $-$ organism which reproduces by multiple fission is the one which causes the disease known as :
→