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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Tick (√) the Correct Alternative from the Choice Given for the Following Statement. When We Add Water to the Following Substances, Which One Will Show a Chemical Change? - Chemistry

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प्रश्न

Tick (√) the correct alternative from the choice given for the following statement.

When we add water to the following substances, which one will show a chemical change?

विकल्प

  • Salt

  • Sugar

  • oil

  • quick lime

MCQ

उत्तर

quick lime

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अध्याय 2: Physical and Chemical Changes - Multiple Choice Questions

APPEARS IN

सेलिना Concise Chemistry [English] Class 7 ICSE
अध्याय 2 Physical and Chemical Changes
Multiple Choice Questions | Q 9

संबंधित प्रश्न

What do you understand by the change of phase of a substance?


Convert the temperature of 373° C to the Kelvin scale.


Write the relation between Kelvin scale and Celsius scale of temperature.


Name the temperature at which :

  1. a liquid changes into a gas. 
  2. a solid changes into a liquid.

Why does the temperature of a substance remain constant during the change of state ?


Explain why, there is no rise in temperature of a substance when it undergoes a change of state though heat is supplied continuously.


Explain briefly, how gases can be liquefied.


Why does a desert cooler cool better on a hot, dry day ?


Draw a labelled diagram of the experimental set-up to demonstrate the sublimation of ammonium chloride.


Why is an egg kicked out of a bottle when air is blown inside the bottle?


Define the following terms:  Melting point


Fill in the blanks:

Water boils at ______.


Fill in the blank with the correct word Given below.

Cohesive forces are negligible in ____


State the property of the following substance.

Naphthalene on heating directly turns into vapour.


Riya pours some water from her bottle into another bottle. Does it change the shape of the water?


What is it made from? Why?

A sickle to cut sugarcane.


Why does this happen?

Kerosene left open in a dish disappears.


State whether the following statement is true or false. If false write the correct statement.

During a chemical change the composition of the original substance is not altered and the change is irreversible.


Select the correct answer from A, B, C, D & E for the statement given below:

The state of matter which has ___________ least density & no free surfaces.


Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in the following case.

During vaporization, the liquid particles ____________ energy.


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