Question Text
Question 1 :
Changes in which one or more new substances are formed are called _______ changes.
Question 2 :
Changes in which new substance are formed are called __________ changes.
Question 3 :
Reactions that take place under the influence of electricity are called:
Question 4 :
<p><span>A fresh apple when cut turns brown after some time because of a :</span></p>
Question 6 :
<div>Write 'true' or 'false' for the given statement. Rewrite the false statement correctly: </div><div>Decomposition of leaves is a fast change.</div>
Question 7 :
The bonds present in $\left( { N }_{ 2 }{ O }_{ 5 } \right) $ are:<br/>
Question 9 :
Which of the following is a true term regarding chemical reactions?`<br>
Question 10 :
When magnesium ribbon burns in air, it forms white ash. The chemical name of white ash is:
Question 11 :
A chemical reaction in which energy is liberated is called :
Question 12 :
The reaction given below is a:<br/>${Copper \ sulphate \left ( soln \right ) + Iron\rightarrow Iron \ sulphate \left ( soln \right )+Copper}$<br/>
Question 16 :
During the formation of the ionic bond, electron transfer takes place from one atom to the others.
Question 18 :
<span>When carbon dioxide gas is passed through lime water, lime water becomes milky. This is an example of: </span>
Question 20 :
Melting of butter is a physical change. <span>State whether the statement is true or false</span>