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प्रश्न
Fill in the blank
_______ is a soft metal.
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उत्तर
Pure gold is a soft metal.
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संबंधित प्रश्न
Write the name and formula of a metal hydride.
State one use of the following metal:
Gold
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?
Which property of ‘solder’ alloy makes it suitable for welding electrical wires?
How are the properties of an alloy different from those of the constituent elements?
Mention two uses of the following metals and non-metals
Gold
Give reasons
Aluminium is used in making aircrafts.
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
A solution of a metal in mercury is called ________
Statements given below are incorrect. Write the correct statements :
Zinc is used for making power transmission wires.
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. Write name of any element present in the same group as X
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
With reference to the following metals state their use in daily life metal:
Aluminium
Give a reason why iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.
Name the following:
A halogen which is a solid at room temperature.
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.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
