Reaction with Metals

Q.

What happens when magnesium reacts with dilute sulphuric acid?

1. Magnesium sulphate is formed

2. None of these

3. Magnesium sulphide is formed

4. Magnesium sulphite is formed

Q.

$Acid+Activemetal\to salt+hydrogen$

1. True

2. False

Q.

The gas X is colourless having a foul smell of rotten eggs. It turns lead acetate paper black. Gas X is formed when zinc sulphide reacts with dilute hydrochloric acid. Name the gas X.

1. H₂S

2. SO₂

3. SO₃

4. Cl₂

Q. Metal compound $A$ reacts with dilute hydrochloric acid produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction If one of the compounds formed is calcium chloride.

Q. Between Nitrogen and Beryllium which one will have higher value of first ionisation enthalpy and why?

Q. Which of these reactions release a gas that burns with a pop sound?

1. $CaC{O}_3+H_{2}S{O}_4\to$
2. $Cu+HCl\to$
3. $K+HCl\to$
4. $NaOH+H_{2}S{O}_4\to$

Q.

Which of the following gas is produced when zinc sulphide reacts with sulphuric acid?

1. SO₃

2. H₂S

3. CO₂

4. SO₂

Q. 17.Is there any relationship between oxidation state and acid strength? What are the factors that determines the acidic strength?

Q. What is the difference between dipole -induced dipole forces and London dispersion forces

Q.

What happens when HCl gas is heated with metals that come before hydrogen in the electrochemical series?

1. Corresponding hydrides are formed

2. Hydrogen is formed

3. Water is formed

4. No reaction takes place

Q.

Question 11
Which of the following metals exist in their native state in nature?
(i) $\text{Cu}$
(ii) $\text{Au}$
(iii) $\text{Zn}$
(iv) $\text{Ag}$

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Q. Most of the atoms tend to lose, gain or share electrons to achieve the nearest noble gas electronic configuration.

1. True
2. False

Q. What are the five uses of Plaster of Paris?

Q. What are the differences in physical and chemical properties of cl and fluorine(like IE, EGE, Hydration enthalpy, reducing power, etc

Q. Match the reactants with their respective products formed, on reacting with $HCl$.

1. $Metalsalt+H_2$
2. $\mathrm{Metal}\mathrm{salt}+{\mathrm{CO}}_2+H_{2}O$
3. $\mathrm{Metal}\mathrm{salt}+H_{2}S$
4. $\mathrm{Metal}\mathrm{salt}+H_{2}O+{\mathrm{SO}}_2$

Q. Most of the atoms tend to lose, gain or share electrons to achieve the nearest noble gas electronic configuration.

1. True
2. False

Q.

1. True
2. False

Q. Red lead is warmed with concentrated hydrochloric acid.

1. ${Pb}_3{O}_4+16HCl\to 3PbCl+{8H}_{2}O+{5Cl}_2$
2. ${2Pb}_3{O}_4+8HCl\to 6PbCl+{8H}_{2}O+{Cl}_2$
3. ${2Pb}_3{O}_4+16HCl\to 6PbCl+{8H}_{2}O+{5Cl}_2$
4. ${44Pb}_3{O}_4+16HCl\to 12PbCl+{8H}_{2}O+{Cl}_2$

Q.

Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid.

1. $Mg\left(s\right)+2HCl\left(aq\right)\to MgC{l}_2\left(aq\right)+H_2\left(g\right)$

2. $Mg\left(s\right)+HCl\left(aq\right)\to MgC{l}_2\left(aq\right)+H\left(g\right)$

3. $Mg\left(s\right)+2HCl\left(aq\right)\to MgCl\left(aq\right)+H_2\left(g\right)$

4. $Mg\left(s\right)+2HCl\left(aq\right)\to 2MgCl\left(aq\right)+H_2\left(g\right)$

Q. An aqueous solution of a metal salt (X) reacts with carbon dioxide to give a water soluble compound (Y) which on heating gives the starting metal salt back Y when present in water does not produce lather with soap. The compounds X and Y, respectively are

1. $CaC{O}_3$ and $Ca(HC{O}_3{)}_2$
2. $Mg(HC{O}_3{)}_2$ and $MgC{O}_3$
3. $Ca(HC{O}_3{)}_2$ and $CaC{O}_3$
4. $MgC{O}_3$ and $Mg(HC{O}_3{)}_2$

Q. Write the balanced reaction for reaction of ferric hydroxide with nitric acid.

1. $Fe{\left(OH\right)}_3+2{HNO}_3\to Fe{\left({NO}_3\right)}_3+3H_{2}O$
2. $Fe{\left(OH\right)}_3+3{HNO}_3\to Fe{\left({NO}_3\right)}_3+3H_{2}O$
3. $2Fe{\left(OH\right)}_3+{HNO}_3\to 3Fe{\left({NO}_3\right)}_3+2H_{2}O$
4. $3Fe{\left(OH\right)}_3+2{HNO}_3\to 3Fe{\left({NO}_3\right)}_2+2H_{2}O$

Q. silver doesnt react with air hence it corrode . why?

Q. A certain metal will liberate hydrogen from dilute acids. It will react with water to form hydrogen only when the metal is heated and the water is in the form of steam.The metal is probably:

1. Iron
2. Potassium
3. Copper
4. Mercury

Q. Most of the atoms tend to lose, gain or share electrons to achieve the nearest noble gas electronic configuration.

1. True
2. False

Q. The balanced equations for the reaction taking place when dilute hydrochloric acid reacts with iron fillings:

1. 6HCl(aq) + Fe(s) $\to$ FeCl${}_3$(aq) + 3H${}_2$(g)
2. 3HCl(aq) + 2Fe(s) $\to$ FeCl${}_3$(aq) + 3H${}_2$(g)
3. 6HCl(aq) + 2Fe(s) $\to$ FeCl${}_3$(aq) + 2H${}_2$(g)
4. 6HCl(aq) + 2Fe(s) $\to$ 2FeCl${}_3$(aq) + 3H${}_2$(g)

Q. Write the balanced chemical reaction for the conversion of sulphur to sulphuric acid.

1. $S+\underset{(hotandconc.)}{6{HNO}_3}\to H_2{SO}_4+{2H}_{2}O+{6NO}_2$
2. $S+\underset{(hotandconc.)}{HN{O}_3}\to H_2{SO}_4+{2H}_{2}O+{NO}_2$
3. $2S+\underset{(hotandconc.)}{6{HNO}_3}\to 2H_2{SO}_4+{2H}_{2}O+{6NO}_2$
4. $2S+\underset{(hotandconc.)}{3{HNO}_3}\to 2H_2{SO}_4+{2H}_{2}O+{3NO}_2$

Q. how is aluminium metal extracted from its ore?

Q. Write the balanced chemical equation for the following:
(i) Silver chloride is treated with aqueous sodium cyanide and the product thus formed is allowed to react with zinc in an alkaline medium.
(ii) Cobalt(II) solution reacts with $KN{O}_2$ in acetic acid medium.

Q. Give an example of a metal which is liquid at room temperature.

Q. Write the balanced equation when ammonia is dissolved in water.