Advertisements
Advertisements
प्रश्न
Fill in the Blank and Rewrite the Statements:
Elements showing properties of both metals and nonmetals are known as _________.
उत्तर
Elements showing properties of both metals and nonmetals are known as metalloids.
APPEARS IN
संबंधित प्रश्न
One day Reeta went to a jeweller’s shop with her mother. Her mother gave an old gold jewellery to the goldsmith to polish. Next day when they brought the jewellery back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss in weight?
Choose the most appropriate answer of the following:
This is not an alloy of copper:
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
Name two non-metals which are both brittle and non-ductile.
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is ______
Statements given below are incorrect. Write the correct statements :
Soda water is prepared by dissolving washing soda in water.
Write ‘True’ or ‘False’ in front of following statement.
Stainless steel is used for making power transmission wires.
Tick (√) the most appropriate answer.
Sodium amalgam is prepared by dissolving sodium in :
Name the non-metal and its natural form, which is the hardest substance.
Name a gaseous non-metal,. having greenish yellow colour.
Name the three classes in which elements are classified. Which was the first metal used by man?
Name the non-metal present in abundance in the earth's crust.
Name:
a non-malleable metal
Distinguish between metals and non metals on the basis of:
(i) ion formation, (ii) discharge of ions, (iii) nature of oxide formed, (iv) oxidizing and reducing property, (v) reaction with acids.
Give the balanced reactions for the following:
Sodium is dropped in water
Make pairs of substances and their properties
| Substance | Property |
| a. Potassium bromide (KBr) | 1. Combustible |
| b. Gold | 2. Soluble in water |
| c. Sulphur | 3. No chemical reaction |
| d. Neon | 4. High ductility. |
Identify the odd term.
Why is hydrogen kept in the metal activity series?
Find the odd one out and give its explanation.
______ is the only non-metal which conducts electricity.
The non – metal which is liquid at room temperature is ______.
