Photochemical Reactions and Photosynthesis MCQs

1. The principal laws of photochemistry are _______________

(A) Lambert’s and Beer’s law

(B) Raoult’s and Dalton’s law

(C) Raoult’s and Henry’s law

(D) Grothus-Draper and Stark-Einstein law

2. Why are the medicine bottles often made with darkened glass?

(A) to allow oxidation of drug

(B) to allow the photodegradation of drug

(C) to prevent the drug from photodegradation

(D) to reduce the cost

3. In photosynthesis, the energy of the sun is converted into chemical energy in which of the following forms?

(A) ATP and NADP

(B) ATP and NADPH

(C) ADP and NADPH

(D) ADP and NADP

4. The nutrient that is not used in cellular respiration is __________

(A) carbohydrates

(B) amino acids

(C) fatty acids

(D) fiber

5. Ozone is formed by which of the following dissociations of molecular oxygen into individual oxygen atoms?

(A) ionic

(B) photochemical

(C) thermal

(D) thermochemical

6. Mercaptans are produced by the photochemical addition of which of the following to the alpha-olefins?

(A) sulphur

(B) hydrogen

(C) hydrogen sulphide

(D) paraffins

7. Not a stage in photosynthesis is ___________

(A) carbon fixation

(B) generation of ATP

(C) phosphorous fixation

(D) absorption of light

8. In the photochemistry of photosynthesis, NADPH stands for which of the following?

(A) Nicotinamide Amine Dinucleotide Phosphatic hydrogen

(B) Nicotinamide Amine Dinucleotide Phosphate

(C) Nicotinamide Adenine Dinucleotide Phosphate

(D) Nicotinamide Adenine Dinucleotide Phosphatic hydrogen

9. Not an example of a photoautotroph is _________

(A) cyanobacteria

(B) plants

(C) human beings

(D) bacteria

10. In photosynthesis, ATP stands for which of the following?

(A) Amine Triphosphate

(B) Amine tri poly phosphate

(C) Adenosine Triphosphate

(D) Ammonium Triphosphate

11. In which of the following reactions do the molecules absorbing light not react but induce the other molecules to react?

(A) Irreversible

(B) Thermal

(C) Photosensitized

(D) Dark

12. Vision is always initiated by which of the following photochemical reactions?

(A) Mercapton

(B) Rhodopsin

(C) Hydrogen Chloride

(D) Enzymes

13. In the photochemical reactions, the absorption of which of the following radiations takes place?

(A) only visible

(B) ultraviolet and visible

(C) radio

(D) visible and x-rays

14. Which of the following are the reactions that are caused by the heat and in the absence of light?

(A) Photochemical reactions

(B) Reversible photochemical reaction

(C) Dark reactions

(D) Reversible reaction

15. An example of a photochemical reaction is __________

(A) Formation of NaOH

(B) Decomposition of ammonia

(C) Decomposition of HCl

(D) Photosynthesis

16. In photosynthesis, RuBP stands for which of the following?

(A) Ribulose phosphate

(B) Ribulose urea Biphosphate

(C) Ribulose Bisphosphate

(D) Ribulose biurea phosphate

17. In photosynthesis, carbon dioxide is converted into sugar by _______

(A) sugar fixation process

(B) carbon fixation process

(C) carbon reduction process

(D) photolysis process