Question
Write what the signs indicate:
✓
Answer
- Figure A indicates inflammable substances. They can catch fire if they come in contact with oxygen-rich air.
- Figure B indicates corrosive substances which can cause damage to tissues of skin, eyes and other delicate organs etc.
- Both the symbols are warning signs for people to keep away or handle carefully such substances.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Describe the process of preparation of aluminium by the electrolysis of alumina.
(OR)
Draw and label the diagram of electrolysis of alumina and explain the electrolytic reduction of alumina.
(OR)
Draw and label the diagram of electrolysis of alumina and explain the electrolytic reduction of alumina.
Complete the process of iron rusting by filling the blanks. Suggest a way to prohibit the process.
The iron rust is formed due to reaction. Different regions on iron surface become anode and cathode.
Reaction on anode region:
$
Fe _{( s )} \rightarrow Fe ^{2+}( aq )+2 e ^{-}
$
Reaction on cathode region:
$
O _{2( g )}+4 H ^{+}( aq )+\ldots \ldots . .2 H _2 O _{( l )}
$
when $Fe ^{2+}$ ions migrate from anode region they react with.......to fomm $Fe ^{3+}$ ions.
A reddish coloured hytirated oxide is formed from. ions. It is called rust.
$
2 Fe ^{3+}( aq )+4 H _2 O _{( l )} \rightarrow+\ldots \ldots \ldots+6 H ^{+}( aq )
$
A way to prevent rusting..........
(Practice Activity Sheer -2 )
→The iron rust is formed due to reaction. Different regions on iron surface become anode and cathode.
Reaction on anode region:
$
Fe _{( s )} \rightarrow Fe ^{2+}( aq )+2 e ^{-}
$
Reaction on cathode region:
$
O _{2( g )}+4 H ^{+}( aq )+\ldots \ldots . .2 H _2 O _{( l )}
$
when $Fe ^{2+}$ ions migrate from anode region they react with.......to fomm $Fe ^{3+}$ ions.
A reddish coloured hytirated oxide is formed from. ions. It is called rust.
$
2 Fe ^{3+}( aq )+4 H _2 O _{( l )} \rightarrow+\ldots \ldots \ldots+6 H ^{+}( aq )
$
A way to prevent rusting..........
(Practice Activity Sheer -2 )
State any four benefits of animal classification.
Observe the given figure and name the following.
| Ray AB | |
| Ray NM | |
| Ray MD | |
| ∠ r |
Explain the role of microbes in farming.
What is a lens? Distinguish between a convex lens and a concave lens. Which of the two is a converging lens : convex lens or concave lens?
With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. In the circuit diagram shown below, find:
→- Total resistance.
- Current shown by the ammeter $A$
Explain the term “corrosion” with an example. Write a chemical equation to show the process of corrosion of iron.
How can we get the required amount of energy by connecting solar panels?
What is a solenoid? Compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet. Draw neat figures and name various components.