मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

What Are Molecules ? - Chemistry

Advertisements
Advertisements

प्रश्न

What are molecules ?

एका वाक्यात उत्तर
Advertisements

उत्तर

Molecules are made of atoms. Molecules exhibit the properties of that kind of matter and has independent exi stance.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Matter and Its Composition - Additional questions

APPEARS IN

सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 1 Matter and Its Composition
Additional questions | Q 7

संबंधित प्रश्‍न

What do you mean by the inter-molecular spaces? How do they vary in different states of matter?


What are the characteristics of matter?


In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?


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?


Explain why, hydrogen and oxygen are considered elements whereas water is not considered an element.


The property/properties which enable copper metal to be used for making electric wires is/are :


What is the most common way of expressing the concentration of a solution ?


What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?


Which of the following are chemical changes and which physical ? Give reason.

  1. a glass bottle breaking
  2. coal burning in air
  3. making a cake
  4. wool being knitted into a sweater

Define solubility of a substance. How does it vary with temperature ?


Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?


Name the process by which the various gases of the air are separated.


How will you separate iron pins from sand ?


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

An atom or group of atoms _________ having a resultant charge.


Define the term matter.


Justify your answer.

Figure 1 Figure 2 Figure 3

The arrangement of particles in three different phases of matter is shown above.

  1. Which state is represented by Fig. 1?
  2. In which state will the inter-particle attraction be maximum?
  3. Which one of them cannot be contained in an open vessel?
  4. Which one can take the shape of its container?

Intermolecular space is maximum in ______.


Atoms are tiny particles that repel each other when they are squeezed very close.


Define the term matter.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×