alleryWhich material would be classified as opaque?
AWindow glass
BWooden board
CClean water
DCellophane paper
Answer & Solution
Correct answer: B. Wooden board
1. Opaque materials allow no view through them.
2. Wood, cardboard and metals are examples of opaque materials.
3. Window glass, water and cellophane are transparent.
_Source: NCERT Curiosity Class 6 Science, Ch 6, 6.3.3_
Keep practising Materials Around Us
Browse all Materials Around Us questions for CTET, or explore more Science topics.
Related questions
Most plastics are produced from which raw sources?Polylactic acid is a popular biodegradable plastic. From which kind of material is it deriWhich use accounts for the largest share, about 40 percent, of plastic?Which plastic is widely used in pipes and construction because of its strength and durabilWho invented Bakelite, the world's first fully synthetic plastic, in 1907?Plastics are composed primarily of which kind of substances?Which metal is thought to have been the first refined, about 11,000 years ago?What is an alloy in the context of metals?