activity

Choose the activity that will need a thermometer. => measuring the room temperature or measuring the length of a table or measuring the amount of milk in a pitcher or measuring the height of a person..

The activity of a catalyst depends on the strength of chemisorption. To be active, the surface of the catalyst should be extensively covered by the adsorbate, that is, the chemisorption should be strong. However, if the strength of the adsorbent-adsorbate bond becomes too stron..

Which of the following activities will not need a thermometer? => to weight a box or to measure the temperature inside your refrigerator or to find out how cold a cup of ice cream is or to find out how hot a cup of coffee is..

For a reaction to occur, reactant molecules must collide with each other. Only those collisions result in product formation which have energy equal or more than a certain minimum energy. This energy is called the threshold energy. This implies that there is an energy barrier between reactants and p..

Antigens are processed by antigen presenting cells like macrophages. The processed antigen is presented on the surface of these cells. A group of T-cells called T helper cells specifically interacts with the presented antigen and becomes activated..

For a reaction to occur, reactant molecules must collide with each other. Only those collisions result in product formation which have energy equal or more than a certain minimum energy. This energy is called the threshold energy. This implies that there is an energy barrier between reactants..

Extracting Metals towards the Top of the Activity Series - Metals such as sodium, magnesium, calcium, aluminium high up in the reactivity series are very reactive and cannot be obtained from their compounds by heating with carbon. This is because these metals have more affinity for oxygen..

Metals and Non-metals..

Differentiation Animation..

Refraction of Light..