Reactivity Series

Q.

How to memorize the reactivity series easily? Is there any mnemonic for it?

Q.

What is the difference between single displacement reaction double displacement reaction?

Q. Consider the following chemical reactions :

I.$AS{O}_4\left(aq\right)+B\left(s\right)\to A\left(s\right)+BS{O}_4\left(aq\right)$

II. $BS{O}_4\left(aq\right)+C\left(s\right)\to B\left(s\right)+CS{O}_4\left(aq\right)$

III. $CSO4\left(aq\right)+D\left(s\right)\to C\left(s\right)+DS{O}_4\left(aq\right)$

IV. $DS{O}_4\left(aq\right)+B\left(s\right)\to Noreaction$

Now, choose the correct order of reactivity of metal A, B, C and D.

1. 
   $A>B>C>D$
2. 
   $B>A>C>D$
3. 
   $C>D>A>B$
4. 
   $D>C>B>A$

Q.

The correct order for the reactivity of the following metals is

1. Fe > Pb > Sn > Ni > H > Cu > Au

2. Fe > Ni > Pb > Sn > Cu > H > Au

3. Fe > Ni > Sn > Pb > H > Cu > Au

4. Fe > Ni > Pb > Sn > Cu > H > Au

Q.

${\mathrm{CuSO}}_4\left(\mathrm{aq}\right)+\mathrm{Zn}\left(\mathrm{s}\right)\to \mathrm{Cu}\left(\mathrm{s}\right)+{\mathrm{ZnSO}}_4$(aq) is an example of?

Q. Consider the given statements and choose the correct option.

Statement-I : Metals that are placed above hydrogen can displace hydrogen from water and dilute acids.

Statement–II : Oxides of metals like K, Na and Ca cannot be reduced by $H_2,CorCO$.

1. 
   Only statement-I is correct
2. 
   Only statement-II is correct
3. 
   Both the statements are correct
4. 
   Both the statements are incorrect

Q.

Why is Hydrogen peroxide stored in coloured bottles?

Q.

What happens when you mix Silver nitrate and Potassium chromate ?

Q. A, B, C are three elements which undergo chemical change according to following equations-
1. A2O3+2B=A2O3+2A
2.3CSO4+B2[SO4]3+3C
3.3CO+2A=A2O3+3C
Q1.ARRANGE IN THEIR INCREASING ORDER?
Q2.WHICH IS MORE REACTIVE?
Q3.WHICH IS LESS REACTIVE?

Please explain ?

Q.

Which of the following pairs will give a displacement reaction?

1. $\mathrm{NaCl}$ solution and Copper metal

2. ${\mathrm{MgCl}}_2$ solution and Aluminium metal

3. ${\mathrm{FeSO}}_4$ solution and Silver metal

4. ${\mathrm{AgNO}}_3$solution and Copper metal

Q. Why the oxides of a high reactive metals cannot be reduced by carbon

Q.

Name the most reactive metal

Q. Which of the following pair does not react either with cold or hot water?

1. $Na,K$
2. $Al,Mg$
3. $Ca,Fe$
4. $Fe,Zn$

Q.

Why does not silver evolve hydrogen on reacting with dilute sulphuric acid?

Q.

is carbon a reactive non-metal or not??

Q.

Which of the following can undergo a chemical reaction?

1. ${\mathrm{MgSO}}_4+\mathrm{Fe}$

2. ${\mathrm{ZnSO}}_4+\mathrm{Fe}$

3. ${\mathrm{MgSO}}_4+\mathrm{Pb}$

4. ${\mathrm{CuSO}}_4+\mathrm{Fe}$

Q. Iron can liberate $H_2$ from dil. $H_2{SO}_4$ but copper cannot liberate $H_2$ from dil. $H_2{SO}_4$.
Why?

1. Fe is more reactive than hydrogen.
2. Fe is less reactive than hydrogen.
3. Cu is less reactive than hydrogen.
4. Cu is more reactive than hydrogen.

Q.

Aluminium is more reactive than Magnesium.

1. True

2. False

Q.

Explain why, carbon cannot reduce oxides of sodium or magnesium.

Q.

What is displacement reaction. Give two examples.

Q.

The two metals which can be extracted just by heating their sulphides in the air are:
(a) sodium and copper (b) copper and aluminium
(c) potassium and zinc (d) mercury and copper

Q. Why magnesium does not react with cold water?

Q.

Which of the two metals is more reactive: copper or silver?

Q.

Why do gold ornaments look new even after several years of use?

Q. Which property of metals is used to make wrappers of the chocolate in the following image?

1. Malleability
2. Sonority
3. Conductivity
4. Ductility

Q.

Question 63
Of the three metals X, Y and Z, X reacts with cold water, Y with hot water and Z with steam only. Identify X, Y and Z and also arrange them in order of increasing reactivity.

Q.

Is the volume of gases produced during electrolysis of water same? If not then what is the ratio in between them?

Q.

Question 41

What happens when a piece of

(a) zinc metal is added to copper sulphate solution?

(b) aluminium metal is added to dilute hydrochloric acid?

(c) silver metal is added to copper sulphate solution?

Also, write the balanced chemical equation if the reaction occurs.

Q.

Which of the following is the most unreactive metal?

1. Iron

2. Lead

3. Aluminium

4. Gold

Q. Which of the following is the least reactive metal?

1. Sodium
2. Copper
3. Silver
4. Gold