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प्रश्न
Identify the odd term.
पर्याय
Brass
bronze
iron
steel
उत्तर
iron
Explanation:
Iron is odd one out because it is not an alloy and others are alloys.
संबंधित प्रश्न
Classify the following elements into metals, non–metals and metalloids: C, Mg, Si, S, Hg, As.
Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties
| Properties | Metals | Non-metals |
| 1. Appearance | Lustrous | Dull |
| 2. Hardness | Hard | Soft |
| 3. Malleability | Can be beaten into thin sheets | Cannot be beaten into thin sheets |
| 4. Ductility | Can be drawn into wires | Cannot be drawn into wires |
| 5. Heat Conduction | Good conductors of heat | Poor conductors of heat |
| 6. Conduction of Electricity | Good conductors of electricity | Poor conductors of electricity |
Choose the correct answer from the options given below :
The two main metals in Bronze are:
(A) Copper and zinc
(B) Copper and lead
(C) Copper and nickel
(D) Copper and tin
State why concentrated sulphuric acid is not used for drying ammonia gas
Name two non-metals which are both brittle and non-ductile.
What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
Name two physical properties of sodium in which it's behaviour is not as expected from it's classification as metal.
Which of the following alloys contains a non-metal as one of the constituents?
(a) brass
(b) amalgam
(c) steel
(d) bronze
Name a non-metal that is used to kill germs in water
The noble gas used in advertising signboards is
What do you understand by the term metal?
Name a non-metal which is good conductor of electricity.
State two important uses of following non-metal
Uses of graphite
State the composition and two uses of given alloy:
Brass
Define metal and non-metal on the basis of electron loss or gain.
Name:
a metal which is a bad conductor of heat and electricity
Give the balanced reactions for the following:
Iron reacts with dilute HCI
Give a short account of heating effect on metal carbonates based on the activity series ?
Give the effect of heat on metal oxides based on the activity series ?
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. |
Write scientific reason.
Copper and brass vessels are cleaned with lemon.
Name a non-metal which can form a positive ion.
A metallic oxide which cannot be reduced by normal reducing agents:
Match the following:
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
Select the appropriate option for the following statement:
The element which is a noble metal.
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 |
Non-metals are non-malleable.
Reason out
Mercury is the only metal that is liquid at room temperature.
