Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Solution and Explanation
Copper does not react with cold water, hot water, or steam. However, iron reacts with steam. If the hot water tanks are made of steel (an alloy of iron), then iron would react vigorously with the steam formed from hot water.
\(3Fe\) + \(4H_2O\) \(→\) \(Fe_3O_4\) + \(4H_2\)
(Iron) (Steam) (Iron(II,III)oxide (Hydrogen)
That is why copper is used to make hot water tanks, and not steel.
Top Questions on Chemical Properties Of Metals
- How would you differentiate between $ \text{O}_3 $ and $ \text{H}_2\text{O}_2 $ (chemically)?
- Tripura JEE - 2024
- Chemistry
- Chemical Properties Of Metals
- Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): Type B metal ions form more stable complexes compared to Type A metal ions.
Reasons (R): High electro-negativity (in relative terms) of metal and low electro-negativity of the legand donor atom would be consistent with stability of a complex with Type B metal ion.
In the light of the above Statements, choose the most appropriate answer from the options given below:- CUET (PG) - 2023
- Environmental Studies
- Chemical Properties Of Metals
- Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Stability of most complexes with the alkaline earth metals is in the order Mg2+ > Ca2+ > Sr2+> Ba2+
Reason R :For type A ions, Electrostatic model approximately explain the stability of metal-ligand complexes that is, stability of these complexes is positively correlated with the ratio of Z2/r for both metal ion and the ligand species.
In the light of the above statements, choose the most appropriate answer from the options given below:- CUET (PG) - 2023
- Environmental Studies
- Chemical Properties Of Metals
- The correct order of ease of adsorption of the hydrated alkali metal ions on an ion exchange resin is
- JIPMER MBBS - 2018
- Chemistry
- Chemical Properties Of Metals
- In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \(Cu_2O\) with
- JIPMER MBBS - 2018
- Chemistry
- Chemical Properties Of Metals
Questions Asked in CBSE X exam
Mendel took garden pea plants with different characteristics, such as height to study the inheritance pattern of factors (genes). He crossed tall pea plant with short pea plant and obtained all the tall plants in the F1 generation.
- CBSE Class X - 2026
- Genetics and Evolution
- Most of metals occur in combined state in form of ores. Carbonate ores are converted into oxides by calcination and sulphide ores by roasting. Oxides are reduced with suitable reducing agent like carbon to get free metal. Highly reactive metals like – Al, Mg are also used as reducing agents to obtain metal from their oxides. Most reactive metals are obtained by electrolytic reduction of their molten ores. Alloying is a very good method of improving the properties of a metal. We can get desired properties by this method. The electrical conductivity and melting point of an alloy is less than that of pure metals.
- CBSE Class X - 2026
- Metallurgy
Lenses can form different types of images depending upon their focal length and position of object. A convex lens can create real, inverted or virtual, erect images, while a concave lens forms only virtual and diminished images. The focal length determines the power of lens. Convex lenses have positive focal length while concave lenses have negative focal length by convention. When lenses are placed together, their combined power is determined by the sum of their individual powers.
- (a) Study the given electric circuit in which 2 A electric current is flowing between points X and Y.
(i) Using the battery, key, voltmeter and ammeter in this given electric circuit, redraw a circuit diagram in which 2 \(\Omega\) and 4 \(\Omega\) resistors are connected between X and Y in parallel combination.
(ii) Circuit drawn by you, in which resistors are connected in parallel combination, calculate the electric current flowing through 4 \(\Omega\) resistor.- CBSE Class X - 2026
- Electricity
- (a) What is hypermetropia?
(b) Write any one cause of hypermetropia.
(c) With the help of a suitable ray diagram, explain how hypermetropia is corrected?- CBSE Class X - 2026
- The Human Eye