Advertisements
Advertisements
प्रश्न
What are the metals that make the alloys brass and bronze?
उत्तर
Metals in Brass and Bronze:
- Brass: It is an alloy, that contains copper and zinc as major constituents.
- Bronze: It is an alloy, that contains copper and tin as major constituents.
संबंधित प्रश्न
Give reasons for the following.
Aluminium foils are used to wrap food items.
Which property of copper and aluminium makes them suitable for making cooking utensils and boilers?
Write the name and formulae of a non-metal hydride.
State five uses of non-metals.
State one use of Hydrogen.
State one use of Carbon (as Graphite).
Metals are said to be shiny. Why do metals generally appear to be dull? How can their brightness be restored?
How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
The electronic configurations of three elements A, B and C are as follows:
| A | 2, 8, 1 |
| B | 2, 8, 7 |
| C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
Name a metal that is most malleable
Name a metal as precious as gold
Name the metals present in the following alloys
Duralumin
Fill in the blank
Tungsten metal is a poor conductor of _______
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is .........................
Match the statements in Column A, with those in Column B .
| Column A | Column B | ||
| 1 | A metal used for making high quality mirrors . | a | Chlorine |
| 2 | A metal which neither malleable nor ductile. | b | Graphite |
| 3 | A non-metal,used in the sterilsation of water. | c | Iodine |
| 4 | A non-metal, whose deficiency can lead to disease like goitre. | d | Silver |
| 5 | A non -metal which can be used as dry lubricant. | e | Zinc |
Name a non-metal which is good conductor of electricity.
Name a gaseous non-metal,. having greenish yellow colour.
State two important uses of following non-metals
Uses of nitrogen
Name:
a non- metal used in alloys
Name:
a non-malleable metal
Name:
a metal which lacks ductility
Write scientific reason.
The stainless steel vessels in Kitchen have copper coating on the bottom.
Gold and silver are used to make jewellery. Give reason
With reference to the physical properties of metals and non-metals, state the following exception.
A non-metal which has low tensile strength
Select the appropriate option for the following statement:
The element placed in the extreme left of the Modern Periodic Table.
Match the columns.
| Group A | Group B |
| 1. Making sheets of metals | a) Sonority |
| 2. Making metal utensils | b) Malleability |
| 3. Making Copper wires | c) Good conductor of heat |
| 4. Making bells from metal | d) Ductility |
______ is the only non-metal which conducts electricity.
A form of non-metal which has high ductility is
Paheli bought a statue made up of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.
The non – metal which is liquid at room temperature is ______.
