Question

BY 15 Suppe
the common
[31
Q16.
Explain the carbon forms cor
for carbon forming
of the other elements?
rbon forming a large number of compounds. Why does carbon ton
omnos
y by covlent bond. Explain in brief two main reasons
hy does carbon form strong bonds with most
[31
OR
i. Why does distilled
Why does distilled water not conduct electricity, whereas rainway
Why do the acids not show acidic behaviour in the absence of wat
ricity, whereas rainwater does?
[31
Q17.
A Name two metals which react violently with cold water.
Gi) Write any three observations you would make when such a metal
ou would make when such a metal is dropped into water
(iii) How would you identify the gas evolved, if any, during the reaction?
Q18. What
What is Chipko movement? How did this movement ultimately beneni me
environment?
nd this movement ultimately benefit the local population an
OR
How is ozone formed in the upper atmosphere? Why is the damas
concern to us? State cause of this damage.
anosphere? Why is the damage of ozone layer ac
Q19.
Distinguish between analogous organs and homologous organs. Identity the end
homologous organs amongst the following: Wings of an insect, wings of a bat, foreli
forelimbs of human.​

Answer 1

Answer:

tetravalency and catienation is the properyy of carbon due to this it form covalent compound