NCERT Solution class 8 Science Chapter-4
Science VIII chapter – 4
Q1. Which of the following can be beaten into thin sheets?
(a) Zice (b) Phosphours (c) Sulphur (d) Oxygen
Ans. (a) Zice
Here, Zice is a mental with malleability
and ductility whereas phosphorus, supphur
and Oxygen are nonmentals which lack
malleability and ductility.
Q2. Which of the following staements is correct?
(a) All metals are ductile.
(b) All non- metals are ductile.
(c) Generally, metals are ductile.
(d) Some non- metals are ductile.
Ans. (c) Generally, metals are ductile.
Ductility is a property where a substance
can be drawn into thin wires, Generally,
metals are ductile with mercury as the exception.
Q3. Fill in the blanks.
(b) Metals are —good— conductors of —electricity—.
(c) Iron is —more— reactive non-metal.
(d) Metals react with acids to produce —hydrogen—
Q4. Mark ‘T’ if statement is true and ‘F’ if it is false.
(a) Generally, non-metals react with acids.
(b) Soldium is a very reactive metal.
(c) Copper displaces zinc from zinc sulphate solution.
(d) Coal can drawn into wires.