Water is not a polar compound
False
True
The solution resulting from dissolving sodium bicarbonate salt in water is acid
The highest percentage of water in the Earth's crust is found in .....
Rivers and freshwater lakes
Springs and wells
Glaciers and polar regions
Seas and oceans
... expresses the transfer of water from the soil to the atmosphere through the pores of plant leaves
The process of respiration
Precipitation
The process of evaporation
The process of transpiration
All of the following gases, when reacting with water vapor in clouds, form rain that corrodes metal structures except ....
No2
NH3
Co2
So2
Nitrogen gas represents a large part of .....
Lithosphere
Biosphere
Atmosphere
Hydrosphere
The main processes involved in the water cycle in nature are ( Evaporation-Condensation- Rain or snowfall)
There are two main opposite processes in the hydrological cycle, which are
Condensation and freezing
Melting and boiling
Evaporation and Condensation
Evaporation and snow
Acid rain reacts with .....
Basic salts
Alkalis
Acid oxides
Basic oxides
Water is in the state of ..... at a temperature higher than 100°© and is considered one of the components of the .....
Vapor - water
Solid - ice
Vapor - atmosphere
Liquid - atmosphere
Water has an important role inside the cells of living organisms
Which of the following layers of the Earth represents the solid part of the Earth ....
in the water the electronegativity of the oxygen atom is ........ the electronegativity of the hydrogen atom
equal
greater than
less than
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 ...
Bays
Lakes
Rivers
Groundwater
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
pH of seawater = .........
7.4 : 8.5
6.5 : 8.5
7.5 : 8.4
6.4 : 7.5
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.
The ratio between the land area to the water area on planet Earth .....
Less than one
Equal to one
Greater than one
Chemical bonds between the hydrogen atom and the oxygen atom in the water molecule
single covalent bonds
hydrogen bond
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 present on the surface of the Earth in .....
Four physical states
Three physical states
Two physical states
One physical state
PH of freshwater = ..........
7.5 : 4.5
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 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
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
Frozen water represents ..... of the water on the Earth's surface
1%
3%
80%
2%
Fresh water that is formed as a result of water seeping through the pores of the soil from sedimentary rocks
groundwater
The biological process that occurs in plants and animals and contributes to the formation of rain is .....
Infiltration
Transpiration
Evaporation
Respiration
which of the followings is true
The boiling point of water increases Because the water molecules are linked to each other by a hydrogen bond
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 decreases Because the water molecules are linked to each other by a single covalent bonds
A bond that arises between a water molecule and another water molecule and is responsible for the high boiling point of water
...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
hydrological cycle
Natural cycle
Rain cycle
Water cycle