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Student from School, City
Subject :NSO    Class : Class 9

Read the given statements and mark the correct option.
Statement 1 : Solid CO2 changes its state when exposed to air.
Statement 2 : CO2 undergoes sublimation.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.


CHanges its state is not explaned

Ans 1:

Rishi Gopi from Loyola, Trivandrum
Class : Class 9
very true

Ans 2:

Pragnya Paramita Swain from VSV, Sunabeda Koraput
Class : Class 9
Option A - Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Because, when solid CO2 is exposed to air it changes into gaseous state i.e. it undergoes "SUBLIMATION". Therefore option A is correct.....

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