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प्रश्न
Fill in the blank
A metal that gives dazzling effect to crackers when they explode is ______
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उत्तर
A metal that gives dazzling effect to crackers when they explode is magnesium.
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संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
Give the composition of an alloy called solder. State its one property and one use.
Give reasons
Gold is mixed with copper and nickel.
A metal with melting point less than 50°C is
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
Salt of silver, such as ________ is used for making photographic films.
State the position of the following in the periodic table:
Alkaline earth metals
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Write name.
The reagent that dissolves noble metals.
With reference to the following metals state their use in daily life metal:
iron
Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
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.
The most abundant metal in the earth’s crust is ____________.
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
Metals are usually solids or gases at room temperature.
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
Which metals are liquid at room temperature?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
