Description : What can be absorbed or released as the result if a chemical reaction?
Last Answer : Heat
Description : Chemical reaction in which light energy is either absorbed or released?
Last Answer : Photochemical reaction
Description : Chemical reaction in which electric en- ergy is either absorbed or released?
Last Answer : Electro chemical reaction
Description : What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor ... as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.
Last Answer : Silver nitrate solution is kept in brown bottles in laboratory because - (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it
Description : What happens when a chemical bond is formed ? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor absorbed
Last Answer : energy is always absorbed
Description : Vitamin A absorbed in intestine is released into (A) Portal circulation (B) Lacteals (C) Both (A) and (B) (D) None of these
Last Answer : Answer : B
Description : Absorbed of water against a concentration gradient by using energy released from respiration is called as
Last Answer : Ans. Active absorption
Description : What refers to the amount of energy absorbed or released during a phase-change process? A. Molar heat B. Latent heat C. Vaporization heat D. Condensation heat
Last Answer : Latent heat
Description : Energy _____ in an Ecosystem. A. is released B. is absorbed C. flows D. None of the above
Last Answer : C. flows
Description : What is the energy absorbed during chemical reaction under constant volume conditions? A. Entropy B. Ion exchange C. Enthalpy D. Enthalpy of reaction
Last Answer : Enthalpy
Description : t is a result of photons of light that are absorbed by the atoms of the glass core molecule. ∙ A. ion resonance absorption ∙ B. infrared absorption ∙ C. ultraviolet absorption ∙ D. visible light absorption
Last Answer : B. infrared absorption
Description : ________ is the result of photons of light that are absorbed by the atoms of the glass core molecules ∙ a. Ion resonance absorption ∙ b. Ultraviolet absorption ∙ c. Infrared absorption ∙ d. Absorption loss
Last Answer : c. Infrared absorption
Description : It is a result of photons of light that are absorbed by the atoms of the glass core molecule
Last Answer : infrared absorption
Description : The heptose ketose sugar formed as a result of chemical reaction in HMP shunt: (A) Sedoheptulose (B) Galactoheptose (C) Glucoheptose (D) Mannoheptose
Last Answer : A
Description : Photo chemical smog is a result-ant of the reaction among – (1) High concentration of NO2, O3, and CO in the evening (2) CO, CO2 and NO2 at low temperature (3) CO, O2 and peroxy acetyl nitrate in the presence of Sunlight (4) NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight
Last Answer : (4) NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight Explanation: Photochemical smog is a unique type of air pollution which is caused by reactions between sunlight and pollutants like hydrocarbons and nitrogen dioxide (NO and NO2).
Description : Identify the result of chemical reaction between permanganate ion and Br- ?
Last Answer : Ans. MnO2 and BrO3 - are formed.
Description : When chemical reactions occur energy is always absorbed?
Last Answer : No, chemical reactions can be endothermic or exothermic.
Description : n a chemical factory where dyes are made, wet cake at 30 OC consisting of 60% moisture is put in a dryer to obtain an output having only 5% moisture, at atmospheric pressure. In each batch about 120 ... dryer and the dryer efficiency is 80%. Latent heat of steam at 4 kg/cm2 is 520 kcal/kg.
Last Answer : Given that Qty of material dried per batch - 120 Kgs Moisture at inlet - 60% a. The quantity of moisture removed per batch. Water quantity in a wet batch - 120 x 0.6 = 72 Kgs. Quantity of bone dry ... - 48/0.95 = 50.5 Kgs. Equivalent water in a dry batch - 50.5 - 48 = 2.5 Kgs.
Description : Under what condition, the heat evolved or absorbed in a reaction is equal to its free energy change?
Last Answer : Ans. As ΔG = ΔH – TΔS. Thus, ΔG = ΔH only when either the reaction is carried out at 0^0 K or the reaction is not accompanied by any entropy change, i.e., ΔS = 0
Description : Under what condition, the heat evolved/absorbed in a reaction is equal to its free energy change?
Last Answer : Ans. In ∆G = ∆H – T. ∆S, when reaction is carried out at 0 K or ∆S = 0, then ∆G = ∆H.
Description : During decomposition, energy is absorbed in the form of heat, light or electricity for breaking down the reactants which is known as: (a) exothermic reaction (b) endothermic reaction (c) reduction reaction (d) oxidation
Last Answer : (b) endothermic reaction
Description : During photosynthesis, energy is absorbed by chlorophyll, therefore it is: (a) exothermic reaction (b) endothermic reaction (c) neither exothermic nor endothermic reaction (d) the process takes place in plants only
Description : For a heterogeneous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is (A) Surface Kc /(1 + TS ) ... A and absorbed B (C) Surface reaction between A in the gas phase and absorbed B (D) Desorption of C
Last Answer : (D) Desorption of C
Description : When one falls asleep is it due to a natural chemical ( a sedative of some sort) released by the brain?
Last Answer : It’s due to tiredness. Seratonin does help with the calming down of the heart rate though.
Description : What is released when chemical bonds are broken but cannot be used to make ATP?
Description : In an atomic explosion enormous energy is released which is due to the - (1) Conversions of neutrons into protons (2) Conversion of chemical energy into nuclear energy (3) Conversion of mechanical energy into nuclear energy (4) Conversion of mass into energy
Last Answer : (4) Conversion of mass into energy
Description : The enormous amount of energy released in an explosion of an atomic bomb is due to the - (1) conversion of mass into energy (2) conversion of chemical energy into heat energy (3) conversion of mechnical energy into nuclear energy (4) conversion of neutrons into protons
Last Answer : (4) conversion of neutrons into protons Explanation: The enormous amount of energy released in an explosion of an atomic bomb is due to the converson of neutrons into protons. When, a neutron strikes ... , each of which is a nucleus with about half the protons and neutrons of the original nucleus.
Description : The energy released at the end of digestion is in the form of: (1) electric energy (2) Kinetic energy (3) thermal energy (4) chemical energy
Last Answer : (4) chemical energy Explanation: Digestion of food involves both physical and chemical processes. During digestion the chemical energy in for released while the molecules of food are broken down into smaller pieces.
Description : Sperms of both Funaria and Pteris were released together near the archegonia of Pteris. Only its sperms enter the archegonia as (a) Pteris archegonia repel Funaria sperms (b) Funaria sperms get ... (c) Funaria sperms are less mobile (d) Pteris archegonia release chemical to attract its sperms.
Last Answer : (d) Pteris archegonia release chemical to attract its sperms.
Description : Name the chemical released by cork cells?
Last Answer : Suberin which makes them impervious to gases and water.
Description : A pheromone is A) an endorphin released within the anterior pituitary. B) a growth factor related to the production of tumors. C) a product of a neurosecretory cell that acts on ... ) a regulatory hormone that stimulates or inhibits the release of hormones produced by other endocrine glands.
Last Answer : D) a chemical released by one animal to affect the behavior of another animal.
Description : The enormous amount of energy released in an explosion of an atmoic bomb is due to the (1) conversion of mass into energy (2) conversion of chemical energy into heat energy (3) conversion of mechnical energy into nuclear energy (4) conversion of neutrons into protons
Last Answer : conversion of neutrons into protons
Description : Why enormous energy is released in nuclear reaction?
Last Answer : This is due to the fact that the forces between nucleons arevery strong - much stronger than the forces between atoms in achemical reaction for example.
Description : During oxidation energy released in a series of slow stepwise reaction controlled by (A)____ and is trapped as (B)____ in the form of (C)____
Last Answer : During oxidation energy released in a series of slow stepwise reaction controlled by (A)____ and is trapped as (B)____ in the form of (C)____
Description : Gas which is released during catabolic reaction of respiration is_____
Last Answer : Gas which is released during catabolic reaction of respiration is_____
Description : Under ambient condition , the total number of gases released products in the final step of the reaction scheme shown below is
Last Answer : Under ambient condition , the total number of gases released products in the final step of the reaction scheme shown below ... ) 1 C. (C) 2 D. (D) 3
Description : The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. Energy released in the process of f
Last Answer : The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. ... .27 MeV C. 0.82 MeV D. 2.45 MeV
Last Answer : The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. ... `10^(12)` sec D. `10^(16)` sec
Last Answer : The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. ... (4) K` D. `3 xx 10^(6) K`
Last Answer : The source of energy of stars is nuclear fusion. Fusion reaction occurs at very high temperature, about `10^(7) `. ... kg` D. `16.02 xx 10^(-27) kg`
Description : When hydrogen is released as a metal reacts with steam what do you think is the other product of the reaction?
Last Answer : The other product of the reaction may be an oxide or hydroxide.