Advertisements
Advertisements
प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
पर्याय
True
False
Advertisements
उत्तर
True.
APPEARS IN
संबंधित प्रश्न
State five uses of metals
Fill in the blank
_______ is a soft metal.
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
A metal which is neither ductile nor malleable is
Write name.
Alloy of sodium with mercury.
Write name.
The oxide that forms salt and water by reacting with both acid and base.
What was Mendeleev's basis for the classification of elements?
What is it made from? Why?
Ornaments
With reference to the following metals state their use in daily life metal:
Aluminium
With reference to the following metals state their use in daily life metal:
Zinc
Soft metal : Na : : hard metal : _______
The metal which is liquid at room temperature is ______.
An element which is always lustrous, malleable and ductile is ______.
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.
All gases are ______.
Metals have high melting points.
Match the following
| i. | Softest metal | a. | Copper |
| ii. | Hardest metal | b. | Sodium |
| iii. | Hardest non–metal | c. | Osmium |
| iv. | Ductility | d. | Diamond |
Why are metalloids called semimetals?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
