In a physical change some of the physical properties of the substance may be altered and the chemical composition?

In a physical change some of the physical properties of the substance may be altered and the chemical composition?
by

1 Answer

Answer :

In a physical change, the chemical composition of a substance is never changed.
by

Related questions

In a physical change some of the first physical properties of the substance may be altered and the chemical composite remains the same true or false?

Description : In a physical change some of the first physical properties of the substance may be altered and the chemical composite remains the same true or false?

Last Answer : The chemical composition is unchanged.

The basic difference between vegetable oils and fats is in their (A) Density (B) Chemical properties (C) Physical state (D) Composition

Description : The basic difference between vegetable oils and fats is in their (A) Density (B) Chemical properties (C) Physical state (D) Composition

Last Answer : (C) Physical state

Vegetable oils and fats basically differ in their (A) Density ranges (B) Physical state (C) Chemical composition (D) Chemical properties

Description : Vegetable oils and fats basically differ in their (A) Density ranges (B) Physical state (C) Chemical composition (D) Chemical properties

Last Answer : (B) Physical state

What is the name for a substance that alters the rate of chemical reactions, without being permanently altered itself?

Description : What is the name for a substance that alters the rate of chemical reactions, without being permanently altered itself?

Last Answer : ANSWER: CATALYST

Depending on the chemical composition and mechanical properties, iron may be classified as (A) Cast iron (B) Wrought iron (C) Steel (D) All the above

Description : Depending on the chemical composition and mechanical properties, iron may be classified as (A) Cast iron (B) Wrought iron (C) Steel (D) All the above

Last Answer : Answer: Option D

what All substances have characteristic properties. If one of these properties can be observed without changing the identity of the substance, it must be A. universal property. B. physical property. C. biological property. D. chemical property.?

Description : what All substances have characteristic properties. If one of these properties can be observed without changing the identity of the substance, it must be A. universal property. B. physical property. C. biological property. D. chemical property.?

Last Answer : B: Physical Property

For a substance, density, solubility and melting point are examples of: w) physical properties x) amorphous properties y) chemical properties z) potential properties

Description : For a substance, density, solubility and melting point are examples of: w) physical properties x) amorphous properties y) chemical properties z) potential properties

Last Answer : ANSWER: W -- PHYSICAL PROPERTIES

The fact that DNA bears the genetic information of an organism implies that (A) Base composition should be identical from species to species (B) DNA base composition should charge with age (C) DNA from different tissues in the same organism should usually have the same base composition (D) DNA base composition is altered with nutritional state of an organism

Description : The fact that DNA bears the genetic information of an organism implies that (A) Base composition should be identical from species to species (B) DNA base composition should charge with age (C) ... the same base composition (D) DNA base composition is altered with nutritional state of an organism

Last Answer : Answer : C

A substance that has a fixed chemical composition is known as ______ substance.  A. Monoatomic  B. Heterogeneous  C. Homogeneous  D. Pure

Description : A substance that has a fixed chemical composition is known as ______ substance.  A. Monoatomic  B. Heterogeneous  C. Homogeneous  D. Pure

Last Answer : Pure

What would be some possible effects, positive or negative, on life expectancy, if you genetically altered humans and animals to be able to digest and incorporate plastic into their physical makeup?

Description : What would be some possible effects, positive or negative, on life expectancy, if you genetically altered humans and animals to be able to digest and incorporate plastic into their physical makeup?

Last Answer : Erections lasting longer than 4 hours?

The addition of any substance to water which leads to change in its physical and chemical characteristics is defined as water pollution. It results in

Description : The addition of any substance to water which leads to change in its physical and chemical characteristics is defined as water pollution. It results in

Last Answer : The addition of any substance to water which leads to change in its physical and ... Increased photosynthesis D. Increased turbidity and deoxygenation

How could you use the physical properties of melting and boiling point to identify a substance?

Description : How could you use the physical properties of melting and boiling point to identify a substance?

Last Answer : The melting point and boiling point of a pure substance are veryspecific numbers; knowing these allows you to narrow down thepossible identity of the substance.

A catalyst remains unchanged at the end of the reaction with regard to (a) Quality (b) Chemical composition (c) Physical state (d) Quantity and chemical composition

Description : A catalyst remains unchanged at the end of the reaction with regard to (a) Quality (b) Chemical composition (c) Physical state (d) Quantity and chemical composition

Last Answer : Ans:(d)

The isomers of a substance must have (a) same chemical properties (b) same molecular weight (c) same structural formula (d) same functional groups

Description : The isomers of a substance must have (a) same chemical properties (b) same molecular weight (c) same structural formula (d) same functional groups

Last Answer : same molecular weight

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is (A) 0 (B) 1 (C) ∞ (D) None of these

Description : Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance ... temperature and pressure is (A) 0 (B) 1 (C) ∞ (D) None of these

Last Answer : (B) 1

(4) None of these Explanation: Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself. A catalyst may participate in multiple chemical transformations. Catalysts that speed the reaction are called positive catalysts.

Description : (4) None of these Explanation: Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that ... may participate in multiple chemical transformations. Catalysts that speed the reaction are called positive catalysts.

Last Answer : Table salt gets moist during rainy season because – (1) sodium chloride is hygroscopic (2) sodium chloride is deliquescent (3) sodium chloride contains some quantity of sodium iodide (4) sodium chloride contains hygroscopic impurities like magnesium chloride

Under certain circumstances, the gut may become a source of sepsis and serve as the motor of systemic inflammatory response syndrome. Microbial translocation is the process by which microorganisms migrate across the mucosal barrier to invade the host. Which of the following mechanisms can promote bacterial translocation? a. An increased number of gut bacteria b. Altered intestinal mucosal permeability c. Decreased host defense mechanisms d. Lack of enteral feeding

Description : Under certain circumstances, the gut may become a source of sepsis and serve as the motor of systemic inflammatory response syndrome. Microbial translocation is the process by which microorganisms ... intestinal mucosal permeability c. Decreased host defense mechanisms d. Lack of enteral feeding

Last Answer : Answer: a, b, c, d 99 Translocation is promoted in three general ways: 1) altered permeability of the intestinal mucosa as caused by shock, sepsis, distant injury, or cell toxins; 2) ... trauma patient d. Fifty percent of non-nitrogen caloric requirements should be provided in the form of fat

Mark incorrect option related to Postcard a) Should not be folded, cut or altered and should be sent unenclosed b) Breach the conditions may be treated as letter and postage will be taxed accordingly c) Unpaid and insufficiently paid postcards are forwarded taxed with double the deficiency. d) The amount recovered from sender after the delivery.

Description : Mark incorrect option related to Postcard a) Should not be folded, cut or altered and should be sent unenclosed b) Breach the conditions may be treated as letter and postage will be taxed ... forwarded taxed with double the deficiency. d) The amount recovered from sender after the delivery.

Last Answer : d) The amount recovered from sender after the delivery.

Which of the following terms refers to altered sensation of orientation in space? a) Dizziness Dizziness may be associated with inner ear disturbances.

Description : Which of the following terms refers to altered sensation of orientation in space? a) Dizziness Dizziness may be associated with inner ear disturbances. b) Vertigo Vertigo is the illusion of ... of sound with internal origin. d) Nystagmus Nystagmus refers to involuntary rhythmic eye movement.

Last Answer : a) Dizziness Dizziness may be associated with inner ear disturbances.

The disadvantage of heating the impression compound in a water bath is: A. It may become brittle B. It may become grainy C. Lower moles with constituents are leached out D. The plasticity of the compound may be altered E. All of the above

Description : The disadvantage of heating the impression compound in a water bath is: A. It may become brittle B. It may become grainy C. Lower moles with constituents are leached out D. The plasticity of the compound may be altered E. All of the above

Last Answer : D. The plasticity of the compound may be altered

What are some physical and chemical properties of the element neon?

Description : What are some physical and chemical properties of the element neon?

Last Answer : Feel Free to Answer

What chemical/physical properties help compare fuels in combustion engines? and how to apply them.

Description : What chemical/physical properties help compare fuels in combustion engines? and how to apply them.

Last Answer : The ratings for fuel energy, flame propagation, combustion speed are based on comparison with octane in gasoline and pentane or cetane (depending on the applicatton) for diesel or jet fuel.. ... are many textbooks on petroleum technology, the Wiki article and references give a good starting point.

Classify minerals into two groups on the basis of chemical and physical properties and give one example of minerals of each group. -Geography

Description : Classify minerals into two groups on the basis of chemical and physical properties and give one example of minerals of each group. -Geography

Last Answer : Minerals are classified on the basis of their physical properties and chemical properties such as: Metallic Minerals Metallic minerals are those that are rich in metals and a source to procure a variety of ... is rich in building stones i.e. sandstone, granite, marble, fuller's earth, and gypsum

Why is melting wax a physical properties of flammability is a chemical property?

Description : Why is melting wax a physical properties of flammability is a chemical property?

Last Answer : Melting is a physical property because the chemical composition remain unchanged.Flammability is a chemical property because involve a combustion reaction.

The members of a homologous series have (a) The same physical properties (b) Different functional groups (c) The same chemical properties (d) Different methods of preparation

Description : The members of a homologous series have (a) The same physical properties (b) Different functional groups (c) The same chemical properties (d) Different methods of preparation

Last Answer : Ans:(c)

Hydrogen differs from deuterium in __________ properties. (A) Radioactive (B) Physical (C) Chemical (D) All (A), (B) and (C

Description : Hydrogen differs from deuterium in __________ properties. (A) Radioactive (B) Physical (C) Chemical (D) All (A), (B) and (C

Last Answer : (B) Physical

Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases. (A) Chemical properties (B) Physical properties (C) Degree of turbulence (D) Interfacial area

Description : Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases. (A) Chemical properties (B) Physical properties (C) Degree of turbulence (D) Interfacial area

Last Answer : (A) Chemical properties

Write three physical & three chemical properties of Hydrogen.

Description : Write three physical & three chemical properties of Hydrogen.

Last Answer : Ans. Physical Properties: (i) Colorless & Odorless gas (ii) Not soluble in water (iii) Low density than air Chemical Properties: (i) Reacts with active metal to form Hydrides (ii) Reacts with nonmetals to form different compound. (iii) Inert at room temperature.

A flat coil and solenoid has A. different fields B. same physical properties C. same fields D. same chemical properties

Description : A flat coil and solenoid has A. different fields B. same physical properties C. same fields D. same chemical properties

Last Answer : same fields

Law of octaves says that if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of elements

Description : Law of octaves says that if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of elements

Last Answer : 7

How are thermodynamic properties classified?  A. Physical and chemical  B. Intensive and extensive  C. Real and imaginary  D. Homogeneous and heterogeneous

Description : How are thermodynamic properties classified?  A. Physical and chemical  B. Intensive and extensive  C. Real and imaginary  D. Homogeneous and heterogeneous

Last Answer : Intensive and extensive

A colligative property depends on: w) chemical properties of particles in system x) physical properties of particles in system y) number of particles present in system z) all of the above

Description : A colligative property depends on: w) chemical properties of particles in system x) physical properties of particles in system y) number of particles present in system z) all of the above

Last Answer : ANSWER: Y -- NUMBER OF PARTICLES PRESENT IN SYSTEM

There are two properties of the cell necessary to maintain nonequilibrium cellular composition; the first is selectivity and the second is energy conversion. Which of the following statement(s) is/are true concerning energy converting transport? a. The site of energy conversion and transport in the plasma membrane involves the phospholipid component b. The Na+-K++-ATPase derives energy from hydrolysis of extracellular ATP c. In some systems, energy inherent in the transmembrane ion gradient can be used to drive transport of a second species d. Examples of species transported via secondary active transport include hydrogen ions, calcium, amino acids and glucose

Description : There are two properties of the cell necessary to maintain nonequilibrium cellular composition; the first is selectivity and the second is energy conversion. Which of the following statement(s ... transported via secondary active transport include hydrogen ions, calcium, amino acids and glucose

Last Answer : Answer: c, d The selectivity of the plasma membrane, although impressive, cannot account for the nonequilibrium composition of living cells. A cell can be maintained in a nonequilibrium state only by ... to drive the transport of a second species such as protons, calcium, amino acids, or glucose

Who change the address in the program counter and cause the flow of control to be altered: a Shift manipulation b. Circular manipulation c. Program control instruction d. __ Allof these

Description : Who change the address in the program counter and cause the flow of control to be altered: a Shift manipulation b. Circular manipulation c. Program control instruction d. __ Allof these

Last Answer : c. Program control instruction

Pick out the wrong statement. (A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition (B) Alumina is added as a promoter to iron catalyst in ammonia synthesis reaction (C) Activation energy for a reaction is obtained from the intercept of the Arrhenius plot (D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

Description : Pick out the wrong statement. (A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition (B) Alumina is added as a promoter to ... Arrhenius plot (D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

Last Answer : (C) Activation energy for a reaction is obtained from the intercept of the Arrhenius plot

A system is in ______ equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.  A. Chemical  B. Thermal  C. Mechanical  D. Phase

Description : A system is in ______ equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.  A. Chemical  B. Thermal  C. Mechanical  D. Phase

Last Answer : Chemical

Lane and Garton classification of petroleum is based on its (A) Composition (B) Specific gravity (C) Optical properties (D) Viscosity

Description : Lane and Garton classification of petroleum is based on its (A) Composition (B) Specific gravity (C) Optical properties (D) Viscosity

Last Answer : (B) Specific gravity

The soul of chemistry is dealing with------? A. Internal structural changes in matter B. Composition of matter C. Properties of matter D. Composition and properties of matter (Answer)

Description : The soul of chemistry is dealing with------? A. Internal structural changes in matter B. Composition of matter C. Properties of matter D. Composition and properties of matter (Answer)

Last Answer : D. Composition and properties of matter (Answer)

Give the composition of SS-304 Write its three properties.

Description : Give the composition of SS-304 Write its three properties.

Last Answer : Composition of SS-304: 18 – 20 % Cr, 8 – 10.5 % Ni, 0.08 % max C, small amount of Mn, Si, P,S and the balance is Fe. Properties: Density= 8000 Kg/ cu. m MP. : 1450 deg. C Thermal conductivity: 16.2 W/(mK) Good weld ability Good heat resistance Good drawing and forming properties

State composition, properties and applications of Tinmann’s solder

Description : State composition, properties and applications of Tinmann’s solder

Last Answer : Composition, properties and applications of Tinmann’s solder :

Write composition, 2 properties and two uses of CNG.

Description : Write composition, 2 properties and two uses of CNG.

Last Answer : Properties: - 1) It is cheaper than petrol or diesel. 2) Its ignition temp is high (5400C). 3) It is odorless & non corrosive. 4) It is light weight gas. 5) ... petrol / CNG) 2) It is also used in locomotive generators to generate electricity that drives the motors of the train.

State the composition and properties of Babbit metal.

Description : State the composition and properties of Babbit metal.

Last Answer : Composition: Sn = 88% Sb = 8% Cu =4% Properties: i) It is silvery white, soft metal alloy. ii) It has very low coefficient of friction. iii) It has very high corrosion and wear and tear ... is used for making engine bearing. ii) It is also used as a common bearing metal in cast iron boxes.

Give the composition, properties and application of Babbit metal.

Description : Give the composition, properties and application of Babbit metal. 

Last Answer : Composition: Sn = 88% Sb = 8% Cu =4%  Properties: i) It is silvery white, soft metal alloy. ii) It has very low coefficient of friction. iii) It has very high corrosion and wear and tear ... used for making engine bearing. ii) It is also used as a common bearing metal in cast iron boxes. 

In a physical change some of the substances in a material change but the properties if the material stay the same?

Description : In a physical change some of the substances in a material change but the properties if the material stay the same?

Last Answer : Need answer

The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by  A. Boyle’s law  B. Charles’ law  C. Gay-Lussac law  D. all of these

Description : The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by  A. Boyle’s law  B. Charles’ law  C. Gay-Lussac law  D. all of these

Last Answer : Answer: D

What is an example of physical change a change in size but not substance?

Description : What is an example of physical change a change in size but not substance?

Last Answer : Need answer

The change in physical size of a substance when its temperature changes.  a. intensive property  b. extensive property  c. volume expansion  d. thermal expansion

Description : The change in physical size of a substance when its temperature changes.  a. intensive property  b. extensive property  c. volume expansion  d. thermal expansion

Last Answer : thermal expansion

Pick out the wrong statement about the machinability of metals. Machinability of a metal (A) Decreases with increase in strain hardening tendencies (B) Decreases with increase in hardness, in general (C) Depend on the composition, microstructure and physical & mechanical

Description : Pick out the wrong statement about the machinability of metals. Machinability of a metal (A) Decreases with increase in strain hardening tendencies (B) Decreases with increase in hardness, in general (C) Depend on the composition, microstructure and physical & mechanical

Last Answer : Option C

Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to ensure correct re-composition from end to end of the network? (A) Physical (B) Data-link (C) Transport (D) Application

Description : Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to ensure correct re-composition from end to end of the network? (A) Physical (B) Data-link (C) Transport (D) Application

Last Answer : (C) Transport 

What are the properties of chemical change ?

Description : What are the properties of chemical change ?

Last Answer : Characteristics of chemical change are as follows: One or more new objects are created. The physical and chemical properties of objects change. A completely new molecule is formed by changing the ... cannot be easily restored to its former state. Absorption or emission of heat energy must occur.