Question Text
Question 1 :
Which type of chemical decomposition reaction is the following reaction?<br>$$Cu(OH)_2\xrightarrow {heat} CuO+H_2O$$
Question 2 :
Aqueous solutions of magnesium chloride and silver nitrate are mixed to form solid silver chloride and aqueous magnesium nitrate.<br/><br/>The balanced molecular equation contains which one of the following terms?
Question 3 :
An oxidizing agent is always takes part in the reduction process while a reducing agent is always take part in the _______ process.
Question 6 :
A chemical reaction in which heat is evolved is called a/an:<br/>
Question 7 :
$$KXO_3$$(s) well mixed with water, temperature of solution falls. This reaction is:<br/>
Question 8 :
A less reactive metal replaces a more reactive metal from its salt solution in water.<br>
Question 12 :
Other signs of a chemical reaction might be an increase in temperature if heat is released or a change in _____.
Question 14 :
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 18 :
How many molecules of $$CO_2$$ are formed when one molecule of $$C_6H_{12}O_6$$ is oxidised in our body?
Question 19 :
Which of the following is(are) an endothermic process(es) ?<br>(i) Dilution of sulphuric acid<br>(ii) Sublimation of dry ice<br>(iii) Condensation of water vapours<br>(iv) Evaporation of water<br>
Question 20 :
Write the type of reaction.<br/>Ethene is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.<br/>