English

Write True Or False for Each Statement. Rewrite the False Statement Correctly. Matter Cannot Exist in Different States. - Chemistry

Advertisements
Advertisements

Question

Write true or false for each statement. Rewrite the false statement correctly.

Matter cannot exist in different states.

Options

  • True

  • False

MCQ

Solution

False.

Matter can exist in different states.

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Matter and Its Composition - Objective type questions

APPEARS IN

Selina Concise Chemistry [English] Class 7 ICSE
Chapter 1 Matter and Its Composition
Objective type questions | Q 2.09

RELATED QUESTIONS

Define the term matter. What is it composed of?


Which one is a kind of matter:


Honey is more viscous than water. Can you suggest why?


When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :


Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?


State any two properties for believing that aluminium is a metal.


9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.


What is a suspension ? Give two examples of suspensions.


When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.

(a) What type of change occurs when solid A is dissolved in water ? Why ?

(b) What type of change occurs when solid D is dissolved in water ? Why ?

(c) Name a metal which you think could behave like solid A. Also name the products B and C.

(d) Name the solid D if it is the one which is used in making ordinary dry cells.

(e) Name the process by which D can be recovered from E.


State whether the following statement are true or false :

Alcohol can be separated from a mixture of alcohol and water by a separating funnel.


Fill in the following blanks with suitable words :

Miscible liquids are separated by .....................


Describe a method to separate a mixture of camphor and sand.


How will you separate camphor, common salt and iron nails from their mixture ?


How will you separate water from mustard oil ?


How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).


The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.

(a) What do you think could (i) constituent A, and (ii) liquid D be ?

(b) What could (i) constituent B, and (ii) liquid E be ?

(c) What could liquid C be ?

(d) How will you separate the mixture containing A, B and C ?


Name one pair of liquids which can be separated by using a separating funnel.


Why wires cannot be drawn from materials such as stone or wood?


______ is a smallest particle.


Solids do not flow.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×