Statement 1: A chemical change may be accompanied by evolution of a gas and changein colour. Statement 2 : Photosynthesis and digestion are chemical changes.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 false and statement 2 is true.D. Both statements 1 and 2 are incorrect

Read the given statements and select the correct option.Statement 1: Phosphorus burns in air at room temperature.Statement 2: It is an example of spontaneous combustion.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

This question contains Statement −1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.Statement - I:Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. andStatement - IIFor heavy nuclei, binding energy per nucleon increases with increasing Z while for light nuclei it decrease with increasing Z.Statement −1 is false, Statement −2 is true.Statement - 1is true, Statement −2 is true; Statement −2 is correct explanation for Statement-1.Statement −1 is true, Statement −2 is true; Statement −2 is not a correct explanation for Statement-1.Statement −1 is true, Statement −2 is False.

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Nitrogen has higher ionisation energy than oxygen          Reason (R) : Nitrogen has half filled orbital.A Both (A) and (R) are correct and (R) is the correct explanation of (A). B Both (A) and (R) are correct but (R) is not the correct explanation of (A) C (A) is correct but (R) is not correct D (A) is not correct but (R) is correct

a) Both assertion and reason are true and reason is the correct explanation of assertion.(b) Both assertion and reason are true but reason is not the correct explanation of assertion.(c) Assertion is true but reason is false.(d) Both Assertion and Reason are false.17. Assertion: Natural gas is gaseous fossil fuelReason: It is made up of volatile hydrocarbon called methane

Identify whether the following statement is true or false. There are different elements present after a chemical reaction than before it.TrueFalse