Test: Nature of matter & its properties (April 5) - JEE MCQ

Planck's constant = J s
Force = kg m s^-2

pico = 10^-12, femto = 10^-15, milli = 10^-3, giga = 10⁹

Properties of three sates of matter:
(i) Solids and liquids have definite volume whereas gases don't possess definite volume.
(ii) Three states of matter solid, liquid and gas are interconvertible by changing the temperature and pressure conditions.
(iii) Solids are rigid and have definite shape thus don't possess a large degree of freedom.

1 inch = 2.54 cm

Relation between F^∘ and celcius scale:
^∘F = 9/5^∘ C + 32

Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.

Water is a compound:

• Its constituents hydrogen and oxygen are present in a fixed ratio, i.e., 2:1 (H₂O).
• Its properties are different from its constituent elements (hydrogen and oxygen).
• Its constituents cannot be separated by simple physical means but require chemical methods.
• Water has a fixed boiling point, which is different from that of both hydrogen and oxygen.

A pure substance is a substance in which only one type of atom or molecule is present.
Example: Water, Sulphur, Sucrose(pure), Helium, etc.
Thus, a pure substance can only be an element or a compound.

1 picometer = 10^-12 m
1 nanometer=10^-9 m
So, 1 picometer = 0.001 nanometer .
From this we get 1 nanometer= 1000 picometer.

Hence, the correct answer is Option A.

Distilled water is the pure form of water with no impurities present in it; others are the mixture of two or more components.