Advertisements
Advertisements
प्रश्न
Statements given below are incorrect. Write the correct statements :
Bronze is a mixture of 10% copper, 80% zinc and 10% tin.
Advertisements
उत्तर
Bronze is a mixture of 80% copper, 10% zinc and 10% tin.
APPEARS IN
संबंधित प्रश्न
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
State five uses of metals.
The atomic number of an element X is 12.
- What must an atom of X do to attain the nearest inert gas electron configuration?
- Which inert gas is nearest to X?
What is an alloy?
Mention two uses of the following metals and non-metals
Oxygen
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Name a metal which is not malleable :
State two important uses of following metals:
Uses of iron
State the position of the following in the periodic table:
Iron and zinc
What was Mendeleev's basis for the classification of elements?
With reference to the following metals state their use in daily life metal:
Silver
Halogen reacts with acid.
Higher Order Thinking Skills.
Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.
- Formulate a hypothesis based on the information provided.
- Briefly state how you would test the hypothesis.
What is ductility?
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
Metals are usually solids or gases at room temperature.
Metals and non–metals are used for making ______, ______ and ______.
Metals are ______ conductors of heat and electricity.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
Which metals are not solid at room temperature?
