The dispersion force and the dipole force has been the attractive forces that result in the formation of bond within the molecules and result in the change in the properties of the compounds.
The dipole force is a strong force and results in a higher boiling point.
The statements regarding the forces are:
(a) For molecules with similar molecular weights, the dispersion forces become stronger as the molecules become more polarizable.
The statement is true.
(b) For the noble gases the dispersion forces decrease while the boiling points increase as you go down the column in the periodic table.
The statement is true.
(c) In terms of the total attractive forces for a given substance, dipole-dipole interactions, when present, are always greater than dispersion forces.
The statement is false.
(d) All other factors being the same, dispersion forces between linear molecules are greater than those between molecules whose shapes are nearly spherical.
The statement is true.
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Answer:
A ,B- false
C,D- true
Explanation:
Dipole forces always lead to stronger attraction and boiling points than dispersion forces. When linear molecules are involved, they often posses greater dipole forces and higher boiling points. Linear alkanes posses higher boiling points than branched alkanes.
The correct answer is A) They all have similar chemical properties.
Explanation:
In chemistry, the periodic table organizes visually the chemical elements. In this, elements are arranged according to different features. In the case of families of the elements, these refer to elements organized in the same column, for example, elements that are in column 18 form a family called noble gases.
These elements form a family because they have chemical properties; in the case of noble gases, this includes similar reactivity and physical features such as color and odor. Besides this, the elements of one family share a similar electron configuration but not the same number of electrons. This means, from the options given the one that identifies the elements that belong to a family is "They all have similar chemical properties".
Each set of elements has an equal number of electrons in the outer orbital. We refer to these as valence electrons. Each element's chemical characteristics are determined by its valence electrons. The correct option is A.
The elements in the same group or column of the periodic table are those whose chemical characteristics are the most comparable. The vertical groups of elements that have the same number of valence electrons and, consequently, comparable chemical characteristics are formed when the elements are arranged in order of atomic number.
Only when matter changes to become a completely other sort of matter can chemical characteristics be measured or observed. They consist of flammability, reactivity, and rusting potential.
Thus the correct option is A.
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The difference in hardness between diamond and graphite is that diamond has an ordered arrangement of atoms within its structure that makes it harder and stronger than graphite. This is due to the high pressure and high temperature that it went.
Diamond is significantly harder than graphite due to its tightly packed arrangement of atoms, while graphite is soft and slippery because of its layered structure.
The difference in hardness between diamond and graphite can be explained by their arrangement of atoms. In diamond, each carbon atom is bonded to four neighboring carbon atoms in a tetrahedral arrangement, creating a rigid and tightly packed structure. This arrangement gives diamond its hardness. On the other hand, in graphite, each carbon atom is bonded to only three neighboring carbon atoms, forming layers that are held together by weak forces called van der Waals forces. These layers can slide past each other easily, making graphite soft and slippery.
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A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.
Kinetic energy is a form of energy in which an object possesses due to its motion. The kinetic energy of an object is depends up on both the velocity and mass. The S.I unit of Kinetic energy is Joules.
The temperature of burning match head is given 230 degree Celsius and temperature of iceberg is given 0 degree Celsius. A burning match head has a higher temperature than the iceberg due to average molecule in the burning match head moves faster than the average molecule in the iceberg.
Thus, from above conclusion we can say that A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.
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b. no ability to produce rain.
c. particles made of ice crystals.
d. its base at or near the ground
Answer: d. Its base at or near the ground.
Explanation:
Fog is a visible weather condition in which the tiny droplets of water present in the atmosphere come together and which forms a thick cloud which lies close to the surface of the ground (land) or above the sea surface. Fog cuts the visibility down to one kilometers, it makes it difficult to observe the things through it. The fog is influenced by several factors such as wind conditions, nearby water bodies, and topography.
Fog is a cloud that has its base at or near the ground. The answer is letter D. Fog results when atmospheric water vapor condenses to the extent that the new forms, water droplets or ice crystals, become visible. Saturation of the air and sufficient condensation nuclei are ordinarily prerequisites for the formation of fog. One of the great hazards associated with fog is a lack of visibility.