Which amongst observations does not indicate that a chemical reaction has occurred?
Which observation does not indicate that a chemical reaction has occurred? Production of gas.
Which observation does indicate that a chemical reaction has occurred?
The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
Which of the following does not usually happen during a chemical reaction?
Refrences. Correct answer: (c) Atoms of one element change into those of another element to form new products. Explanation: It is not atoms but bonds between the atoms break and form during a chemical reaction. Atoms rearrange themselves during a chemical reaction.
Which of the following Cannot be considered indicators of a chemical reaction in this experiment?
The correct answer is Common salt.
Which is not a characteristics of chemical reaction?
Explanation: BECAUSE AFTER CHEMICAL CHANGE OBJECT DOES NOT COME IN ITS ORIGINAL STATE THEREFORE REVERSIBILITY IS NOT CHARACTERISTIC OF CHEMICAL CHANGE .
Which is not an example of chemical reaction?
Ice melting is a physical change and not a chemical reaction.
How do you identify a chemical reaction?
There are five (easy) ways to detect a reaction:
- Color Change.
- Precipitate Formation (solid formation falling out of solution)
- Gas Formation (bubbles and odor)
- Temperature Change.
- pH Change.
Which of the following does not determine the reaction time *?
Rate of reaction does not affected by enthalpy of reaction because it depends on change in concentration, time, volume, physical state of reactants (surface area), pressure etc.
Which is not an indicator of a chemical change?
Color. The changing of color of a substance is not necessarily an indicator of a chemical change. For example, changing the color of a metal does not change its physical properties. However, in a chemical reaction, a color change is usually an indicator that a reaction is occurring.
Which of the following Cannot be indicator?
The correct answer is Common salt.
Which of the following does not change on occurrence of a chemical reaction *?
Mass does not change when a chemical reaction take place.
Which of the following is not a chemical process?
The correct answer is Freezing of water. Freezing is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point. Freezing of water is not a chemical change as ice when melt changes back to water showing the physical change.
What is not a chemical process?
On the fundamental level, the only processes that are not chemical in nature are gravitational processes and nuclear/subatomic-particle processes.
Which of the following is not a type of chemical reaction?
Carbonisation is not a type of chemical reaction.
Which of the following does a chemical equation not do?
Solution : A chemical equation is not a complete description of what actually happens during a chemical reaction. It generally represents only the overall change, i.e., the number and kind of atoms, molecules, or ion present before and after a reaction.
What are the 7 indicators of a chemical change?
Seven Things That Indicate a Chemical Change Is Occurring
- Gas Bubbles Appear. Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas. …
- Formation of a Precipitate. …
- Color Change. …
- Temperature Change. …
- Production of Light. …
- Volume Change. …
- Change in Smell or Taste.
Apr 28, 2018
Which of the following Cannot be used as an indicator to test the nature of the solution a Lemon B China Rose Petal’s C beet D turmeric?
Answer. China rose is also cosidered as natural indicator the left one lemon is not an idicator. Hope it helps.
Which of the following is not an natural indicator?
question. Phenolphthalein is not a natural indicator. Indicators acquired from natural sources are called natural indicators.
Which one of the following is not an example of a chemical change?
The correct answer is option 1 i.e Changing of water to water vapour. Changing water to water vapour is NOT an example of chemical change.
Which is not an example of a chemical reaction?
The correct answer is Freezing of water. Freezing is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point. Freezing of water is not a chemical change as ice when melt changes back to water showing the physical change.
Which is not true for a chemical change?
False – During a chemical change, the composition of the original substance is altered and the change is irreversible. False – Melting of butter and wax are examples of chemical changes. False – Melting of ice is an endothermic, reversible physical change.
What are the 6 signs of a chemical change?
Terms in this set (6)
- Gives off Light.
- Gives off Heat.
- Gas Formation.
- Precipitate Forms (Liquid + Liquid = Solid)
- Change in Color.
- Bubbles.
Which of the following is not an indicator?
(c) Phenolphthalein. (d) Methyl orange. (a) Vinegar. Vinegar is not an indicator.
Which of following is not an indicator?
(c) Phenolphthalein. (d) Methyl orange. (a) Vinegar. Vinegar is not an indicator.
Which of following Cannot be used as an indicator?
The correct answer is Common salt.
Which of the following is not a characteristic of a chemical changes?
Explanation: BECAUSE AFTER CHEMICAL CHANGE OBJECT DOES NOT COME IN ITS ORIGINAL STATE THEREFORE REVERSIBILITY IS NOT CHARACTERISTIC OF CHEMICAL CHANGE .
Which of the following is true about what happens when a chemical reaction occurs?
Which of the following statements is true about what happens during a chemical reaction? Bonds of the reactants are broken, and bonds of the products are formed.
Which of the following is not an indicator of development?
National income is the total value of all goods and services produced in one year. National income is not an indicator of Human Development Index.
Which of the following is not an indicator of developing countries?
Which of the following is not an indicator of economically underdeveloped countries? Low proportion of labour force in the primary sector is not an indicator of economically underdeveloped countries.
What are the 5 indicators of development?
Tikson (2005) will be presented on these five indicators:
- Income per capita. …
- Economic structure. …
- Urbanization. …
- Savings Figures. …
- Quality of Life Index. …
- Human Development Index ( Human Development Index )
Feb 24, 2021