Description : The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reactions with low activation energy are: (A) Always irreversible (B) Insensitive to temperature changes (C) Mostly irreversible (D) Highly temperature sensitive
Last Answer : (B) Insensitive to temperature changes
Description : The minimum energy required to eject an electron from a metal surface is called a) Intensity b) Threshold frequency c) Work function d) Photo energy
Last Answer : c) Work function
Description : The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy. (A) Activation (B) Potential (C) Binding (D) Threshold
Last Answer : (A) Activation
Description : The minimum frequency required to eject electrons from a metallic surface is called a) Critical frequency b) Peak value of frequency c) Threshold frequency d)Photo frequency
Last Answer : c) Threshold frequency
Description : The difference between Threshold energy and average energy of the molecules is called activation energy. Ina chemical reaction lowers the rate of reaction the greater will be. The activation energy
Last Answer : How do you define the molecularity of a reaction ?
Description : Is it true or false that absolute threshold is the minimum amount of stimulus the human body can detect?
Last Answer : Need answer
Description : Is it true that absolute threshold is the minimum amount of the stimulus the human body can detect?
Description : The excess energy of the reactants required to dissociate into products is known as the __________ energy. (A) Thermal (B) Activation (C) Threshold (D) Binding
Last Answer : (B) Activation
Description : In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) (A) A (B) N (C) A + N (D) A - N
Last Answer : (C) A + N
Description : Threshold energy in a reaction is equal to the (A) Activation energy (B) Normal energy of reactants (C) Sum of (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Sum of (A) & (B)
Description : The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the (A) Increased temperature reduces the activation energy (B) Fraction of molecules having threshold energy increases (C) Collision frequency increases (D) Value of threshold energy decreases
Last Answer : (B) Fraction of molecules having threshold energy increases
Description : Pick up the correct statement from the following: (A) The minimum frequency of light for which no electrons are emitted, is called threshold frequency (B) Polarising angle of glass is 57.5° (C) At the polarising angle, the reflected and refracted rays are orthogonal (D) All the above
Last Answer : Answer: Option D
Description : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : The threshold stimulus is the minimum stimulus r
Last Answer : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : ... D. If both Assertion and Reason are false.
Description : An aeroplane is starting a non-precision approach with an MDH of 250ft and minimum visibility of 800 meters. ATC gives threshold, mid-runway and final third RVRs. When may the approach be started? ... than 800m. RVR is for precision approaches only. d. When threshold RVR is greater than 800m
Last Answer : d. When threshold RVR is greater than 800m
Description : What is the relation between reaction taking place in one of the several stages and the total amount of energy liberated in the reaction ?
Last Answer : The relation between reaction taking place in one of the several stages and the total amount of energy liberated in the reaction is same.
Description : Time required for the organism to eliminate 50% the total body burden or tissue concentration of chemical is referred as – (1) Threshold limit time (2) Halftime life (3) Residual-period (4) Half-life period
Last Answer : (4) Half-life period Explanation: Time required for the organism to eliminate 50 per cent of the total body burden or tissue concentration of chemical is referred to as Half Life Period.
Description : Time required for the organism to eliminate 50% the total body burden or tissue concentration of chemical is referred as (1) Threshold limit time (2) Half-time life (3) Residual period (4) Half-life period
Last Answer : Half-life period
Description : Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the (A) Industrial chimney exhaust (B) Automobiles exhaust (C) Photochemical reaction in polluted atmosphere (D) Burning of domestic fuel
Last Answer : (B) Automobiles exhaust
Description : What is the minimum amount of time that it takes to create a new product? a. 3 months b. 6 months c. 1 year d. 2 years e. 5 years
Last Answer : c. 1 year
Description : If you hosted a lurve threshold party, what would your reaction be if the honoree didn't bother to show up?
Last Answer : Maybe the honoree just isn’t into the parties? I’m not sure we can really impose this sort of responsibility onto other jellies, especially if they were never interested in lurve or lurve parties to begin with.
Description : Substrate concentration at which an enzyme attains half its maximum velocity is (A) Threshold value (B) Michaelis-Menton constant (C) Concentration level (D) None of these
Last Answer : Answer : B
Description : Renal threshold for glucose is decreased in (A) Diabetes mellitus (B) Insulinoma (C) Renal glycosuria (D) Alimentary glycosuria
Last Answer : C
Description : What is normal renal threshold for glucose?
Last Answer : 180 mg/100 ml.
Description : Pick out the wrong statement. (A) A particular chemical reaction is more temperature sensitive at low temperatures (B) A very high value of equilibrium constant, K (K >> 1) indicates that the ... ) Non-ideal flow takes place in reactors due to recycling, channeling or by creation of stagnant regions
Last Answer : (C) The intercept of the Arrhenius plot is called the 'activation energy
Description : Which of the following statements is true with regard to the relationship among audit risk, audit evidence, and materiality? a. The lower the inherent risk and control risk, the lower ... inherent risk. d. Aggregate materiality thresholds should not change under conditions of changing risk levels
Last Answer : Under conditions of high inherent and control risk, the auditor should place more emphasis on obtaining external evidence and should reduce reliance on internal evidence
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
Last Answer : (b) endothermic reaction
Description : In which organelle following reaction takes place 6 CO2 + 6 H2O + energy (from sunlight) ---------> C6H12O6 + 6 O2 (A) Mitochondrion (B) Peroxisome (C) Chloroplast (D) Glyoxysome
Last Answer : (C) Chloroplast
Description : How much amount of energy is required to break the Triple bond in nitrogen molecule ?
Last Answer : 225 Kcal/mole or 945.4 KJ/mole
Description : Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further ... correct explanation of A C. A is true but R is false D. A is false but R is true
Last Answer : ANS: A
Description : The energy required to start an enzymatic reaction is called (A) Chemical energy (B) Metabolic energy (C) Activation energy (D) Potential energy
Last Answer : Answer : C
Description : What is the theoretical bare minimum amount of time required to write a novel?
Last Answer : It depends on how fast you can type. At 140 wpm, you could write a novel in about 5 hours.
Description : In liquid extraction, if the selectivity is unity, then (A) Separation of the constituents is the most effective (B) No separation will occur (C) Amount of solvent required will be minimum (D) Solvent flow rate should be very low
Last Answer : (B) No separation will occur
Description : Permanent working capital A. varies with seasonal needs B. includes fixed assets C. is the amount of current assets required to meet a firm's long-term minimum needs D. includes accounts
Last Answer : C. is the amount of current assets required to meet a firm's long-term minimum needs
Description : The amount of current assets required to meet a firm's long-term minimum needs is referred to as working capital. A. permanent B. temporary C. net D. gross
Last Answer : A. permanent
Description : Mark the correct option a) A literate person can account with cheque facility b) No minimum amount is required for opening of Workers wage account c) Saving account can be opened by cash only d) All the above
Last Answer : d) All the above
Description : Which performance parameter is the minimum amount of optical power required to achieve a specific bit-error rate (BER) in digital systems or a given signal-to-noise ratio (SNR) in analog systems?
Last Answer : Receiver sensitivity.
Description : The energy of activation of a chemical reaction: (A) Is same as heat of reaction at constant pressure (B) Is the minimum energy which the molecules must have before the reaction can take place (C) Varies as fifth power of the temperature (D) Both (B) and (C)
Last Answer : (B) Is the minimum energy which the molecules must have before the reaction can take place
Description : Depolarization of axolemma during nerve conduction takes place because of (a) equal amount of Na+ and K+ move out across axolemma (b) Na+ move inside and K+ move more outside (c) more Na+ outside (d) none of these.
Last Answer : (b) Na+ move inside and K+ move more outside
Description : In the somatic cell cycle (a) in G1 phase DNA content is double the amount of DNA present in the original cell (b) DNA replication takes place in S phase (c) a short interphase is followed by a long mitotic phase (d) G2 phase follows mitotic phase.
Last Answer : (b) DNA replication takes place in S phase
Description : Critical mass" is the minimum mass of nuclear fissile material required for the (A) Sustainment of chain reaction (B) Power generation on commercial scale (C) Economic power generation (D) None of these
Last Answer : (A) Sustainment of chain reaction
Description : A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called (A) Cesspool (B) Lagoon (C) Skimming mill (D) Septic tank
Last Answer : (D) Septic tank
Description : (a) What are fuel cells? Explain the electrode reactions involved in the working of H2 – O2 fuel cell. (b) Represent the galvanic cell in which the reaction Zn (s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s) takes place. -Chemistry
Last Answer : (a) Fuel cells : These cells are the devices which convert the energy produced during combustion of fuels like H2, CH4, etc. directly into electrical energy. The electrode reaction for H2 – O2 fuel cell : (b) The galvanic cell may be represented as Zn (s) | Zn2+ (1M) || Cu2+ (1M) | Cu (s)
Description : Coupling reaction takes place when benzene diazonium chloride is treated with :
Last Answer : Coupling reaction takes place when benzene diazonium chloride is treated with : A. Benzaldehyde B. `alpha`-naphthol C. N, N-dimethyl aniline D. Phenol
Description : Fusion reaction takes place at high temperature because
Last Answer : Fusion reaction takes place at high temperature because A. atoms are ionised at high ... is high enough to overcome repulsion between nuclei
Description : (A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition state intermediate.
Last Answer : (A) `S_(N^(2))` reactioin takes place in single step. (R) `S_(N^(2))` reaction involves transition ... . D. IF (A) is incorrect but (R) is correct.
Description : Reimer-Tiemann reaction of phenol with cholorform and aqueous alkali takes place through the intermediate formation of:
Last Answer : Reimer-Tiemann reaction of phenol with cholorform and aqueous alkali takes place through the ... carbanions C. carbon radicals D. carbenes
Description : Which of the following compounds is prduced when this reaction takes place ? `H_(3)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-O-CH_(3)ove
Last Answer : Which of the following compounds is prduced when this reaction takes place ? `H_(3)C-overset(CH_(3))overset ... -OH` C. Both of these D. None of these
Description : `(CH_(3))_(3)C - OH overset(H_(2)SO_(4)) rarr (CH_(3))_(2) C = CH_(2)`, This reaction takes place through
Last Answer : `(CH_(3))_(3)C - OH overset(H_(2)SO_(4)) rarr (CH_(3))_(2) C = CH_(2)`, This reaction ... )2` mechanism C. `E_(1)` mechanism D. `E_(2)` mechanism
Description : In the elctrolysis of alumina using cryotile, the reaction that takes place at cathode is
Last Answer : In the elctrolysis of alumina using cryotile, the reaction that takes place at cathode is A. `12F^(-) to 6 F_(2)+ ... 2)` D. `4Al^(3+)+12e^(-) to 4Al`
Description : What reaction takes place when an acid is placed on a calcite or calcareous soil?
Last Answer : Example of reaction:CaCO3 + 2 HCl = CaCl2 + H2O + CO2