ETEA RECONDUCTED PAPER 2023 ETEA 2023 ( PART 12 ) 1. If the work done by the system on the surroundings and heat is absorbed by the system from the surroundings the change in internal energy ΔE will be ΔE= ΔE= ( -q ) + w ΔE= Q + ( -w ) ΔE= q + w ΔE= ( -q ) + ( -w ) 2. Humans are unable to digest Starch Fructose Denatured protein Cellulose 3. H2O has geometry Pyramidal Distorted tetrahedral Linear Regular tetrahedral 4. Greater the resonance energy of a molecule Higher will be its reactivity Higher will be its density Lower will be its stability Higher will be its stability 5. For an endothermic reaction H represents the enthalpy of reaction. The minimum value for the energy for activation will Less than delta H Zero More than delta H Equal to delta H 6. Flame tests identify alkali metals when they are burnt. Which of the combination given Is the correct one Cs: yellow Na : lilac Li : red K: red 7. Enantiomers are examples of Trans isomers Geometric isomers Cis isomers Optical isomers 8. Compound X reacts with Grignard’s reagent to produce tertiary alcohols. Which is the compound Aldehyde Acid halide Carboxylic acid Ketone 9. Brass is an alloy of Copper and magnesium Copper and zinc Copper and Iron Copper and silver 10. An unknown element having electronic configuration (Na) 5s2, 5p5. Will be Non-metal of VII-A group Metal of II-A group Non-metal of V-A group Metalloid of V-A group Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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