Question 3 :
The substance that initially involved in a chemical reaction is called a reactant.

Question 4 :
<p>Oils on treating with hydrogen in the presence of palladium or nickel&#160;catalyst&#160;form fats.&#160;This is an example of :</p>

Question 6 :
In $$HS^, I^, R-NH_2, NH_3$$ order of proton&#160;excepting tendency will be:

Question 10 :
In the reaction, $$4Fe+3O_2\rightleftharpoons 4Fe^{3+}+6O^{2-}$$ Which of the following statements is incorrect?

Question 11 :
An oxidizing agent is always takes part in the reduction process while a reducing agent is always take part in the _______ process.

Question 12 :
Three cations $$A, B, C$$ are allowed to react with ammonium hydroxide solution. $$A$$ and $$B$$ produce a dirty green precipitate and a reddish brown precipitate respectively, both of which do not dissolve on further addition of $${NH}_{4}OH$$. $$C$$ gives pale blue colour precipitate with less amount of ammonium hydroxide and on further addition of $${NH}_{4}OH$$, precipitate becomes soluble and deep blue colour solution is formed:

Question 14 :
Which of the following symbol is used to show solid precipitate?

Question 15 :
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.