What is correct about the following satement
(a) Portion of spectrum between 500-800 nm is PAR
(b) Mg, Ca, Cl have prominent role in photolysis of water
In cyclic photophosphorylation, `O_(2)` and `NADPH` are not produced
What is correct about the following satement
(a) Portion of spectrum between 500-800 nm is PAR
(b) Mg, Ca, Cl have prominent role in photolysis of water
In cyclic photophosphorylation, `O_(2)` and `NADPH` are not produced
(a) Portion of spectrum between 500-800 nm is PAR
(b) Mg, Ca, Cl have prominent role in photolysis of water
In cyclic photophosphorylation, `O_(2)` and `NADPH` are not produced
A
a true, b, c false
B
b true, a, c false
C
a, b true, c false
D
a, b false, c true
Text Solution
Verified by Experts
The correct Answer is:
D
Topper's Solved these Questions
Similar Questions
Explore conceptually related problems
Consider the following statements (A) The portion of the spectrum between 500nm and 800 nm is also referred to as photosynthetically active radiation (PAR) (B) Magnesium, calcium and chloride ions play prominet roles in the photolysis of water (C) In cyclic photopphosphorylation, oxygen is not released (as there is no photolysis of water) and NADPH is also not produced
Which of the following statement is / are incorrect ? (i) Green light falling in the range of wavelength 500 0 -580 nm is least effective for photosynthesis. (ii) In non - cyclic photophosphorylation, the electron expelled from the reaction centre is not cycled back , though its loos is compensated by electrons from the photolysis of water . (iii) Chl a , Chl b , carotenoids , and xanthophylls are insoluble in organic solvents. (iv) 400-700 nm light is used in photosynthesis also known as PAR. (v) Red light is the most effective for photosynthesis.
Read the following four statement A,B,C and D and select the right opition having both correct statements. statements (a) Z scheme of light raction takes place in presence of PS I only . (B ) Omly PS I is functional in cyclic photosporylation (c ) Cyclic photophosphorylation results into synthesis of ATP and NADPH_(2) (D ) Stroma lamllae lack PSII as welll as NADP
Read the following four statements, A, B, C and D and select the right option having both correct statements. Statements : (A) Z scheme of light reaction takes place in present of PSI only. (B) Only PSI is functional in cyclic photophosphorylation (C) Cyclic photophosphorylation results into synthesis of ATP and NADPH_(2) (D) Stroma lamellae lack PSII as well as NADP Options:
Give the names and formula of the compounds indicated in the following statements. (a). A compounds of Ca used in setting fractured bones. (b). A compounds of calcium and hydrogen which is used as a prtable source of hydrogen for filling balloons. (c ). A compounds of Ca,O,Cl and H used as germicide. (d). A compound of Mg,O,Cl and H used as a cement for joining cracked teeth. (e). A compound of Mg, Cl and O used as a drying agent. ltbRgt (f). A compound of Ca and O which when heated in oxycoal gas flame gives limelight. (g). A compound of Ca, C and N used as a fertiliser. (h). A triatomic compound of Ca which gives H_(2) on treatments with water.
Read the passage given below and answer the question: In the last 10 years much has been learned about the molecular structure of elemental sulfur. It is now known that many different types of rings are sufficiently metastable to exist at room temperature for several days. It is known that at high temperature, the equilibrium composition allows for a variety of rings and chains to exist in comparable concentration, and it is known that at the boiling point and above, the vapor as well as the liquid contains small species with three, four, and five atoms. The sulfur atom has the same number of valence electrons as oxygen. Thus, sulfur atoms S_2 and S_3 have physical and chemical properties analogous to those of oxygen and ozone. S_2 has a ground state of 38 sigma 3s^2 sigma "*"3s^2 sigma 3pz^2 pi 3px^2=pi3py^2 pi"*"3px^1=pi"*"3py^1.S3 , thiozone has a well- known uv spectrum, and has a bent structure, analogous to its isovalent molecules O_3, SO_2 , and S_2O . The chemistry of the two elements, sulphur and oxygen, differs because sulfur has a pronounced tendency for catenation. The most frequently quoted explanation is based on the electron structure of the atom. Sulfur has low-lying unoccupied 3d orbitals, and it is widely believed that the 4s and 3d orbitals of sulfur participate in bonding in a manner similar to the participation of 2s and 2p orbitals in carbon. (source: Meyer, B. (1976). Elemental sulfur. Chemical Reviews, 76(3), 367-388. doi:10. 1021//cr603010003 ) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion: Thiozone has bent structure like ozone. Reason: Ozone has a lone pair which makes the molecule bent.
Read the passage given below and answer the following questions: Reduction of carboxylic acids and their derivatives plays an important role in organic synthesis, in both laboratory and industrial processes. Traditionally, the reduction is performed using stochiometric amounts of hydride reagents, generating stochiometric amounts of waste. A much more attractive, atom-economical approach is a catalytic reaction using H_2 , however, hydrogenation of carboxylic acid derivatives under mild conditions is a very challenging task, with amides presenting the highest challenge among all classes of carbonyl compounds. Very few examples of the important hydrogenation of amides to amines, in which the C-O bond is cleaved with the liberation of water (Scheme 1), were reported. C-O cleavage of amides can also be affected with silanes as reducing agents. We have now prepared the new, dearomatized, bipyridine-based pincer complex 3, catalyst 3(Here refered as Cat. 3). Remarkably, it efficiently catalyzes the selective hydrogenation of amides to form amines and alcohols (eq 1). The reaction proceeds under mild pressure and neutral conditions, with no additives being required. Since the reaction proceeds well under anhydrous conditions, hydrolytic cleavage of the amide is not involved in this process. (Balaraman, E., Gnanaprakasam, B., Shimon, L. J., & Milstein, D. (2010). Direct hydrogenation of amides to alcohols and amines under mild conditions. Journal of the American Chemical Society, 132(47), 16756-16758.) In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage. Assertion: Aniline can be prepared from suitable amide using catalyst 3 Reason: The use of catalyst 3 is limited to aliphatic amides only.
Read the passage given below and answer the question: In the last 10 years much has been learned about the molecular structure of elemental sulfur. It is now known that many different types of rings are sufficiently metastable to exist at room temperature for several days. It is known that at high temperature, the equilibrium composition allows for a variety of rings and chains to exist in comparable concentration, and it is known that at the boiling point and above, the vapor as well as the liquid contains small species with three, four, and five atoms. The sulfur atom has the same number of valence electrons as oxygen. Thus, sulfur atoms S_2 and S_3 have physical and chemical properties analogous to those of oxygen and ozone. S_2 has a ground state of 38 sigma 3s^2 sigma "*"3s^2 sigma 3pz^2 pi 3px^2=pi3py^2 pi"*"3px^1=pi"*"3py^1.S3 , thiozone has a well- known uv spectrum, and has a bent structure, analogous to its isovalent molecules O_3, SO_2 , and S_2O . The chemistry of the two elements, sulphur and oxygen, differs because sulfur has a pronounced tendency for catenation. The most frequently quoted explanation is based on the electron structure of the atom. Sulfur has low-lying unoccupied 3d orbitals, and it is widely believed that the 4s and 3d orbitals of sulfur participate in bonding in a manner similar to the participation of 2s and 2p orbitals in carbon. (source: Meyer, B. (1976). Elemental sulfur. Chemical Reviews, 76(3), 367-388. doi:10. 1021//cr603010003 ) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion: Sulphur has a greater tendency for catenation than oxygen. Reason: 3d and 4s orbitals of Sulphur have same energy.
Read the passage given below and answer the following questions: Reduction of carboxylic acids and their derivatives plays an important role in organic synthesis, in both laboratory and industrial processes. Traditionally, the reduction is performed using stochiometric amounts of hydride reagents, generating stochiometric amounts of waste. A much more attractive, atom-economical approach is a catalytic reaction using H_2 , however, hydrogenation of carboxylic acid derivatives under mild conditions is a very challenging task, with amides presenting the highest challenge among all classes of carbonyl compounds. Very few examples of the important hydrogenation of amides to amines, in which the C-O bond is cleaved with the liberation of water (Scheme 1), were reported. C-O cleavage of amides can also be affected with silanes as reducing agents. We have now prepared the new, dearomatized, bipyridine-based pincer complex 3, catalyst 3(Here refered as Cat. 3). Remarkably, it efficiently catalyzes the selective hydrogenation of amides to form amines and alcohols (eq 1). The reaction proceeds under mild pressure and neutral conditions, with no additives being required. Since the reaction proceeds well under anhydrous conditions, hydrolytic cleavage of the amide is not involved in this process. (Balaraman, E., Gnanaprakasam, B., Shimon, L. J., & Milstein, D. (2010). Direct hydrogenation of amides to alcohols and amines under mild conditions. Journal of the American Chemical Society, 132(47), 16756-16758.) In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage. Assertion: Use of hydride catalyst or hydrogen brings about cleavage of C-O bond in amides. Reason: Hydride catalyst or hydrogen cause to reduction of amides.
Read the passage given below and answer the following questions: Reduction of carboxylic acids and their derivatives plays an important role in organic synthesis, in both laboratory and industrial processes. Traditionally, the reduction is performed using stochiometric amounts of hydride reagents, generating stochiometric amounts of waste. A much more attractive, atom-economical approach is a catalytic reaction using H_2 , however, hydrogenation of carboxylic acid derivatives under mild conditions is a very challenging task, with amides presenting the highest challenge among all classes of carbonyl compounds. Very few examples of the important hydrogenation of amides to amines, in which the C-O bond is cleaved with the liberation of water (Scheme 1), were reported. C-O cleavage of amides can also be affected with silanes as reducing agents. We have now prepared the new, dearomatized, bipyridine-based pincer complex 3, catalyst 3(Here refered as Cat. 3). Remarkably, it efficiently catalyzes the selective hydrogenation of amides to form amines and alcohols (eq 1). The reaction proceeds under mild pressure and neutral conditions, with no additives being required. Since the reaction proceeds well under anhydrous conditions, hydrolytic cleavage of the amide is not involved in this process. (Balaraman, E., Gnanaprakasam, B., Shimon, L. J., & Milstein, D. (2010). Direct hydrogenation of amides to alcohols and amines under mild conditions. Journal of the American Chemical Society, 132(47), 16756-16758.) In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage. Assertion: N-methyl ethanamide on reaction with catalyst 3 will yield ethanol and methanamine. Reason: Use of Catalyst 3 brings about cleavage of C-N bond of amides
DINESH PUBLICATION-PHOTOSYNTHESIS-CYG
- What is correct about the following satement (a) Portion of spectrum...
Text Solution
|
- Solar radiations contain ultraviolet radiations of wavelength
Text Solution
|
- Soil humus theory of plant nourishment was given by
Text Solution
|
- Chlorophyll a is called universal photosynthetic pigment because it oc...
Text Solution
|
- Which one is Hill oxidant ?
Text Solution
|
- Action spectrum of photosynthesis was discovered by
Text Solution
|
- Girdling experiments cannot be successful in case of Cucurbita because...
Text Solution
|
- First transitory chemical formed by reaction between CO(2) and RuBP is
Text Solution
|
- PEPco occurs in
Text Solution
|
- the acientist who discovered atmospheric CO(2) concentration to be sub...
Text Solution
|
- Wilmott's bubbler is meant for ptoving
Text Solution
|