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प्रश्न
Fill in the blank:
A metal stored in kerosene oil is _______
उत्तर
A metal stored in kerosene oil is sodium.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Iron is ________ reactive than copper.
Give reasons for the following.
Immersion rods for heating liquids are made up of metallic substances.
Name a non-metal having a very high melting point.
How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed? How will you demonstrate it?
Name a non-metal that is used for filling into electric bulbs
Fill in the blank.
A non-metal used to purify water is ______.
Match the statements in Column A, with those in Column B .
| Column A | Column B | ||
| 1 | A metal used for making high quality mirrors . | a | Chlorine |
| 2 | A metal which neither malleable nor ductile. | b | Graphite |
| 3 | A non-metal,used in the sterilsation of water. | c | Iodine |
| 4 | A non-metal, whose deficiency can lead to disease like goitre. | d | Silver |
| 5 | A non -metal which can be used as dry lubricant. | e | Zinc |
State two important uses of following non-metal
Uses of chlorine
Name the three classes in which elements are classified. Which was the first metal used by man?
Name:
two metals which are soft
Name:
a non metal which conducts electricity
Name:
two non metals which are monoatomic
Name:
a metal whose oxide is reduced only by carbon
Explain how the activity series accounts for each of the following:
reaction with acids
Identify the odd term.
From the list of characteristics given below, select the five which are relevant to non-metals and their compounds:
- Ductile
- Conduct electricity
- Brittle
- Acidic Oxides
- Basic Oxides
- Discharged at anode
- Discharged at cathode
- Ionic chlorides
- Covalent chlorides
- Reaction with dilute sulphuric acid yields hydrogen
- 1, 2 or 3 valence electrons
- 5, 6, 7 valence electrons
(Write the five letters corresponding to the correct characteristics).
How are metals like sodium, potassium, and calcium obtained? Give equations.
State whether the statement given below is true or false. If false write the correct statement.
The chemical name of rust is iron [III] oxide.
Non-metals form covalent chlorides because ____________.
Match the following:
| 1. | Non-metals | a. | Silicon |
| 2. | Metals | b. | fire extinguisher |
| 3. | Metalloids | c. | dull and soft |
| 4. | Oxygen | d. | hard and shiny |
| 5. | Water | e. | supports fire |
