Advertisements
Advertisements
Question
Find the odd one out and give its explanation.
Options
Boron
Chlorine
Bromine
Fluorine
Solution
Boron
Explanation-
Boron is placed in group 13 while others are placed in group 17 of the modern periodic table.
APPEARS IN
RELATED QUESTIONS
You are given a hammer, a battery, a bulb, wires and a switch.
- How could you use them to distinguish between samples of metals and non-metals?
- Assess the usefulness of these tests in distinguishing between metals and non-metals.
Name the non-metal which is used to convert vegetable oil into vegetable ghee (solid fat).
Name the non-metal which is used as a rocket fuel (in liquid form).
State one use of Carbon (as Graphite).
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?
State any three differences between the physical properties of metals and non-metals.
Give reasons
Impure diamond is used to cut glass
Name one metal which is a liquid at room temperature
Name:
a metal which is a bad conductor of heat and electricity
`Na _____ → Na^+`
Explain how the activity series accounts for each of the following:
reaction with acids
Give the balanced reactions for the following:
Sodium is dropped in water
The table below compares some properties of metals and non-metals. Write down the missing
statements (i) to (iv) :
| Metals | Non-metals |
| (i) ………………….. | Poor conductors of heat |
| (ii) Malleable | …………………… |
| (iii) Form positive ions | …………………… |
| (iv) ………………… | Form acidic oxides |
How many valence electrons are present in:
(i) metals and
Why do gold ornaments look new even after several years of use?
Distinguish between an ore and a metallic compound.
With reference to the physical properties of metals and non-metals, state the following exception.
A non-metal which has low tensile strength
State whether the statement given below is true or false. If false write the correct statement.
Lead pencils contain lead.
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.
A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming
- Identify A, B and C
- To which Group of Periodic Table does A belong?
