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प्रश्न
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.
पर्याय
True
False
उत्तर
True.
APPEARS IN
संबंधित प्रश्न
Name the gas that is produced in the given case:
The reaction of ethanol and sodium.
Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali.
Name one metal which is stored in kerosene oil.
Name the non-metal which is used to preserve food materials.
State one use of Carbon (as Graphite).
Metals are said to be shiny. Why do metals generally appear to be dull? How can their brightness be restored?
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?
The electronic configurations of three elements A, B and C are as follows:
| A | 2, 8, 1 |
| B | 2, 8, 7 |
| C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is ______
Write ‘True’ or ‘False’ in front of following statement.
Graphite is used in making filaments of electric bulb.
State any five physical properties of a non-metal.
What is an alloy?
Name:
a non-metal with high m.p & b.p
Give the balanced reactions for the following:
Sodium is dropped in water
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which floats on water.
State whether the statement given below is true or false. If false write the correct statement.
Lead pencils contain lead.
Match the columns.
| Group A | Group B |
| 1. Making sheets of metals | a) Sonority |
| 2. Making metal utensils | b) Malleability |
| 3. Making Copper wires | c) Good conductor of heat |
| 4. Making bells from metal | d) Ductility |
______ is the only non-metal which conducts electricity.
The atomic number of an element ‘X’ is 12. Which inert gas is nearest to X?
Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?
