Science, asked by deepikaagupta9953, 7 months ago

Subjective Questions
E Very shortanswer type questions:
SECTION-B
What happen when you apply force to an object?
2 What happen to the solubility of solid in any liquid when that solution is cooled?
3. How you can change a gas into a liquid ?
4 What do you understand by saturated solution?
5. What do you understand by universal solvent?
Short answer type questions:
Write the important condition for a change to be called a chemical change.
2 Write the conditions by applying which we can slow down the rusting of iron.
3. Give the characteristics of a physical change.
4. How would you show that solubility of a substance increases with the rise in temperature ?
5. Define solubility
very short answer

Answers

Answered by Anonymous

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VERY SHORT ANSWER TYPE..

Applied Force Affects Motion of Object. An applied force affects the motion of an object. An applied force can be a push, pull, or dragging on an object. ... The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction.
The average kinetic energy of the solute molecules also increases with temperature, and it destabilizes the solid state. ... The impurities dissolve as well, but when the solution is cooled, it is often possible to selectively crystallize, or precipitate, the desired substance in a purer form.
The easy answer is to lower the surrounding temperature. When the temperature drops, energy will be transferred out of your gas atoms into the colder environment. When you reach the temperature of the condensation point, you become a liquid..
The term saturated solution is used in chemistry to define a solution in which no more solute can be dissolved in the solvent. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate or is let off as a gas.
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid.

SHORT ANSWER TYPE

conditions necessary for a chemical reaction are : 1- a minimum amount of energy 2-the molecules or atoms of the reactants must collide with one another 3- the speed of the reaction should be appreciable 4- the rate of reaction depends on: 1- temperature 2- presence of light 3- electricity 4- pressure .
Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc is more reactive than iron, so it oxidises in preference to the iron object..
Three characteristics of physical change are:

(i) No new substance is formed.

(ii) These changes are reversible.

(iii) Physical properties of product and reactant are same.

4.For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

5..... Solubility is a property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.

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Answered by ItzBadCaptain

Answer:

VERY SHORT ANSWER TYPE..

Applied Force Affects Motion of Object. An applied force affects the motion of an object. An applied force can be a push, pull, or dragging on an object. ... The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction.The average kinetic energy of the solute molecules also increases with temperature, and it destabilizes the solid state. ... The impurities dissolve as well, but when the solution is cooled, it is often possible to selectively crystallize, or precipitate, the desired substance in a purer form.The easy answer is to lower the surrounding temperature. When the temperature drops, energy will be transferred out of your gas atoms into the colder environment. When you reach the temperature of the condensation point, you become a liquid..The term saturated solution is used in chemistry to define a solution in which no more solute can be dissolved in the solvent. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate or is let off as a gas.Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid.SHORT ANSWER TYPEconditions necessary for a chemical reaction are : 1- a minimum amount of energy 2-the molecules or atoms of the reactants must collide with one another 3- the speed of the reaction should be appreciable 4- the rate of reaction depends on: 1- temperature 2- presence of light 3- electricity 4- pressure .Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc is more reactive than iron, so it oxidises in preference to the iron object..Three characteristics of physical change are:

(i) No new substance is formed.

(ii) These changes are reversible.

(iii) Physical properties of product and reactant are same.

Explanation:

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