Tick the correct statement and cross the incorrect one. A. Nepal is rich in flaura and fauna. e. Rhinoceros is found in the Mountain region of Nepal.
2. Fill in the blanks using appropriate words.
a. Biotic components of environment include
b. Consumers depend on for their food.
c. Natural resources can be conserved in environment.
d. is found in Surkhet, Udayapur and Sindhuli districts.
e. Various species of flaura are found in Nepal due to its geographic diversity and variation.
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First ine is true and the second one is False because rhinoceros is found mostly in Chitwan national park in terai region .

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.