Water is present on the surface of the Earth in .....
Two physical states
One physical state
Three physical states
Four physical states
Water is not a polar compound
False
True
The biological process that occurs in plants and animals and contributes to the formation of rain is .....
Infiltration
Transpiration
Respiration
Evaporation
when we Adding ammonium chloride salt to water in relation to pH
It hydrolyzes and causes an increase in the concentration of negative hydroxide ions and decrease in the concentration of positive hydrogen ions, making the solution acidic and the pH value more than 7
It hydrolyzes and causes an increase in the concentration of negative hydroxide ions and decrease in the concentration of positive hydrogen ions, making the solution acidic and the pH value less than 7
It hydrolyzes and causes an increase in the concentration of negative hydroxide ions and an increase in the concentration of positive hydrogen ions, making the solution acidic and the pH value less than 7
It hydrolyzes and causes a decrease in the concentration of negative hydroxide ions and an increase in the concentration of positive hydrogen ions, making the solution acidic and the pH value less than 7
The ratio between the land area to the water area on planet Earth .....
Equal to one
Less than one
Greater than one
The main processes involved in the water cycle in nature are ( Evaporation-Condensation- Rain or snowfall)
Frozen water represents ..... of the water on the Earth's surface
3%
2%
80%
1%
All of the following lead to an increase in the percentage of water vapor in the atmosphere except ....
The process of rainfall
The process of respiration in plants and humans
The process of transpiration in plants
There is no correct answer
Water is in the state of ..... at a temperature higher than 100°© and is considered one of the components of the .....
Vapor - atmosphere
Solid - ice
Vapor - water
Liquid - atmosphere
Which of the following layers of the Earth represents the solid part of the Earth ....
Lithosphere
Atmosphere
Biosphere
Hydrosphere
The solution resulting from dissolving sodium bicarbonate salt in water is acid
There are two main opposite processes in the hydrological cycle, which are
Evaporation and Condensation
Condensation and freezing
Melting and boiling
Evaporation and snow
All of the following gases, when reacting with water vapor in clouds, form rain that corrodes metal structures except ....
No2
Co2
So2
NH3
in the water the electronegativity of the oxygen atom is ........ the electronegativity of the hydrogen atom
equal
less than
greater than
Fresh water that is formed as a result of water seeping through the pores of the soil from sedimentary rocks
Bays
Lakes
Rivers
groundwater
A bond that arises between a water molecule and another water molecule and is responsible for the high boiling point of water
hydrogen bond
single covalent bonds
PH of freshwater = ..........
6.4 : 7.5
7.5 : 4.5
6.5 : 8.5
7.5 : 8.4
Acid rain leads to the erosion of building facades due to .....
The formation of new fragile compounds
Its descent in large quantities and submerging them
Severe collision with it and its fragmentation
All of the above
Chemical bonds between the hydrogen atom and the oxygen atom in the water molecule
...A nearly closed system capable of changing the surface of the earth physically, chemically and biologically through a continuous change between the three states of water
Water cycle
Natural cycle
hydrological cycle
Rain cycle
... expresses the transfer of water from the soil to the atmosphere through the pores of plant leaves
The process of respiration
The process of evaporation
Precipitation
The process of transpiration
pH of seawater = .........
7.4 : 8.5
Acid rain is a rain resulting from the chemical reaction of water vapor in clouds with compounds present in the atmosphere
when Acid rain falling on rocks it works to break them up and decompose them.
Acid rain reacts with .....
Basic oxides
Acid oxides
Basic salts
Alkalis
The highest percentage of water in the Earth's crust is found in .....
Glaciers and polar regions
Rivers and freshwater lakes
Seas and oceans
Springs and wells
The water reservoir that is formed as a result of water seeping through the soil and rocks downwards and some of it comes out in the form of springs is ...
Groundwater
Water has an important role inside the cells of living organisms
which of the followings is true
The boiling point of water decreases Because the water molecules are linked to each other by a single covalent bonds
The boiling point of water decreases Because the water molecules are linked to each other by a hydrogen bond
The boiling point of water increases Because the water molecules are linked to each other by a single covalent bonds
The boiling point of water increases Because the water molecules are linked to each other by a hydrogen bond
Nitrogen gas represents a large part of .....