Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 6: Subject Enrichment

Author:Vaishali Gupta, Shalini Bajaj & Supriya D.Sheshadri

Vaishali Gupta Science Solutions for Exercise - Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 6: Subject Enrichment

Attempt the free practice questions from Exercise 6: Subject Enrichment with hints and solutions to strengthen your understanding. Science Horizons solutions are prepared by Experienced Embibe Experts.

Questions from Vaishali Gupta, Shalini Bajaj and, Supriya D.Sheshadri Solutions for Exercise 6: Subject Enrichment with Hints & Solutions

MEDIUM
7th CBSE
IMPORTANT

Neha visited her village during summer vacation. She was impressed by the newly constructed metallic bridge on the village river. In the next vacation, Neha observed that shiny-lustrous bridge had developed reddish-brown patches at various places. She advised the villagers to paint the bridge, failing which the reddish-brown patches would eventually weaken the structure. 

What values are exhibited by Neha? 

MEDIUM
7th CBSE
IMPORTANT

Neha visited her village during summer vacation. She was impressed by the newly constructed metallic bridge on the village river. In the next vacation, Neha observed that the shiny-lustrous bridge had developed reddish-brown patches at various places. She advised the villagers to paint the bridge, failing which the reddish-brown patches would eventually weaken the structure. 
Name the metal which is used for construction of the bridge?  (Zinc / Copper / Iron)

MEDIUM
7th CBSE
IMPORTANT

Neha visited her village during summer vacation. She was impressed by the newly constructed metallic bridge on the village river. In the next vacation, Neha observed that shiny-lustrous bridge had developed reddish-brown patches at various places. She advised the villagers to paint the bridge, failing which the reddish-brown patches would eventually weaken the structure. 
Why was the bridge turning reddish-brown? How can it be prevented?

MEDIUM
7th CBSE
IMPORTANT

Neha visited her village during summer vacation. She was impressed by the newly constructed metallic bridge on the village river. In the next vacation, Neha observed that shiny-lustrous bridge had developed reddish-brown patches at various places. She advised the villagers to paint the bridge, failing which the reddish-brown patches would eventually weaken the structure. 

What are the two essential conditions for the above change?