Description : Which of the following are optimum temperature conditions for making benzenediazonium chloride from aniline? (a) 0°C to 10°C (b) 20°C to 25°C (c) 30°C to 40°C (d) 45°C to 50°C
Last Answer : 0°C to 10°C
Description : Lumirhodopsin is stable only at temperature below (A) –10°C (B) –20°C (C) –40°C (D) –50°C
Last Answer : Answer : D
Description : Air intake for an air compressor should be preferably taken from (A) A site, where cooling towers are located nearby (B) A site, where open coal yard in located nearby (C) An air conditioned room maintained at a temperature of 18°C (D) An outside atmosphere at 10°C
Last Answer : (D) An outside atmosphere at 10°C
Description : The optimum cardinal temparature point for germination of rice seeds is– 1) 20°C – 25°C 2) 18°C – 22°C 3) 30°C – 32°C 4) 37°C – 39°C
Last Answer : 1) 20°C – 25°C
Description : The average temperature of sewage in India, is A. 10°C B. 15°C C. 20°C D. 25°C
Last Answer : ANS: C
Description : A Fahrenheit thermometer indicates a temperature of ‘ 14°F. its corresponding reading on the Celsius scale will be -----? A. – 2O°C B. – 10°C (Answer) C. + 10°C D. + 20°C
Last Answer : B. – 10°C (Answer)
Description : Thermophilic micro-organism grow well at temperature– 1) 10°C – 20°C 2) 20°C – 40°C 3) 50°C – 60°C 4) 5°C – 7°C
Last Answer : 3) 50°C – 60°C
Description : A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is - 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal ... rise after a conversion of 0.5 will be: (A) 5°C (B) 10°C (C) 20°C (D) 100°C
Last Answer : (B) 10°C
Description : Citrus seeds can be stored with Charcoal at following temperature in dry conditions. a. 0-3°C b. 3-10°C c. 10-15°C d. Above 15°C
Last Answer : 3-10°C
Description : Onion seeds can germinate at a temperature of : a. 0-1°C b. 1-5°C c. 5-11°C d. 15-20°C
Last Answer : 1-5°C
Description : Optimum temperature for cool season vegetables is: a. 25-30°C b. 25-27°C c. 18-24°C d. 15-20°C
Last Answer : 18-24°C
Description : Germination of undeveloped seeds is favored by: a. Warm temperature (>20°C) b. Gibberallic acid c. Low temperature (
Last Answer : a & b
Description : 5 days-biochemical oxygen demand (BOD5) is taken at a temperature of A. 0°C B. 15°C C. 20°C D. 25°C
Description : Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are (A) 5°C and 1 kgf/cm2 (B) - 20°C and 1 kgf/cm2 (C) 0°C and 1 kgf/cm2 (D) 0°C and 3 kgf/cm
Last Answer : (A) 5°C and 1 kgf/cm
Description : Normal temperature and pressure (N.T.P.) corresponds to (A) 0°C and 760 mm Hg (B) 15°C and 760 mm Hg (C) 20°C and 760 mm Hg (D) 0°C and 1 kgf/cm2
Last Answer : (C) 20°C and 760 mm Hg
Description : If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be (a) 80°C (b) 0°C (c) 40°C (d) 20°C (e) 60°C.
Last Answer : Answer : b
Description : Tender crop cannot tolerate a minimum temperature of a. -2°C b. -1°C c. 0°C d. All of above
Last Answer : All of above
Description : Fats are solids at (A) 10°C (B) 20°C (C) 30°C (D) 40°C
Last Answer : Answer : B
Description : When water is heated from 0°C to 10°C. Its volume (1) increases (2) decreases (3) does not change (4) first decreases and then increases
Last Answer : (4) first decreases and then increases
Description : What happens, When water is heated from 0°C to 10°C the volume of water?
Last Answer : First decreases then increases
Description : A gas has a volume of 27.3 c.c. at 0°C. Its volume at 10°C (if pressure remains unchanged) will be __________ c.c. (A) 2.73 (B) 28.3 (C) 273 (D) 283
Last Answer : (B) 28.3
Description : The bacteria which are able to grow at 0°C but which grow at 20°C to 30°C, are known as a. Psychrophiles b. Facultative psychrophiles c. Average psychrophiles d. Mesophiles
Last Answer : Ans: C
Description : The Manufacturer of aeration devices reports the oxygen transfer rate of the device obtained through laboratory tests carried under standard conditions. Such standard condition are : (a) Wastewater at zero DO, 25°C and 760 mm ... DO, 20°C and 760 mm Hg (d) Wastewater at zero DO, 0°C and 700 mm Hg
Last Answer : (c) Tapwater at zero DO, 20°C and 760 mm Hg
Description : Other things being suitable, what level of temperature is considered ideal for optimum growth of banana crop ? (A) 36°C (B) 18°C (C) 30°C (D) 12°C (E) 27°C
Last Answer : (C) 30°C
Description : Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it. (A) Coal ash (B) Potassium cyanide (C) Ortho-xylene (D) None of these
Last Answer : (B) Potassium cyanide
Description : Lower temperature than normal convert male flowers into perfect flowers in ________: a. Date palm b. Mango c. Papaya d. Citrus
Last Answer : Papaya
Description : Low temperature helps to _________ growth inhibitors: a. Increase b. Decrease c. Store d. Produce
Last Answer : Decrease
Description : Low temperature regime in summer which stops growth of mango is : a. 35°F b. 30°F c. 20°F d. 18°F
Last Answer : 18°F
Description : Match the following : [IAS 1999] A. Cotton 1. Rainfall 1000-1500 mm; Temperature 40°-60°C B. Flax 2. Rainfall 1500-2000 mm; Temperature 25°-35°C C. Sugarbeet 3. Rainfall 600-S00 mm; Temperature 5°-18°C D. Jute 4. Rainfall 500-1000 mm; ... 1 3 4 2 (b) 2 3 5 4 (c) 4 5 2 1 (d) 4 3 5 2 shop.ssbcrack.com
Last Answer : Ans: (d)
Description : Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled (A) And ... (C) At the same relative humidity (D) And dehumidified with decrease in wet bulb temperature
Last Answer : (D) And dehumidified with decrease in wet bulb temperature
Description : The temperature condition for storage of drug products under cold temperature is given as : (A) temperature between 8°C and 25°C (B) temperature below 20 C (C) temperature at 0°C (D) temperature between 2c C and S: C
Last Answer : (D) temperature between 2c C and S: C
Description : Broad-leave evergreens such as Ficus bengalensis and Alstonia schularis should be fertilized in: a. Early spring b. Late fall c. Late summer d. Early summer
Last Answer : Early spring
Description : Pruning in narrow leave evergreens should be done during: a. Early fall b. Winter c. Summer d. Early spring
Description : Anthesis of grapes complete at: a. Pedicel fall b. Calyx drop c. Cap fall d. None
Last Answer : Cap fall
Description : Shrubs fall in the category of a. 7-15 feet high b. 25 feet high c. More than 25 feet d. None of these
Last Answer : 7-15 feet high
Description : Frond length of cultivated date ranges: a. 3-5 m b. 3-4 m c. 2-3 m d. 1-2 m
Last Answer : 3-4 m
Description : The only pest of date fruit at green hard stage is: a. Nightangale b. Parrot c. Sparrow d. All of above
Last Answer : Parrot
Description : Soft nose is a disorder of: a. Date fruit b. Citrus fruit c. Mango fruit d. Apple fruit
Last Answer : Mango fruit
Description : At the time of transplanting, weight of date palm sucker should be: a. 5-10 kg b. 10-20 kg c. 20-30 kg d. Less than 5 kg
Last Answer : 10-20 kg
Description : Dhaki variety of date palm was originated in: a. Sindh b. NWFP c. Balochistan d. Punjab
Last Answer : NWFP
Description : All commercial date palm orchards in Pakistan are pollinated by a. Insects b. Winds c. Natural d. Manual
Last Answer : Manual
Description : Salt tolerant fruit plants are: a. Date and Ber b. Ber and Guava c. a & b d. None
Description : Date palm propagation is by means of: a. Suckers b. Seeds c. Off shoots d. None
Last Answer : Suckers
Description : Pruning is carried out in date palm variety: a. Deglet Noor b. Hillawi c. Khudrawi d. Ajwa
Last Answer : Deglet Noor
Description : Seedless date palm variety is: a. Hassaku b. Hillai c. Ajwa d. None
Last Answer : Hassaku
Description : Maximum production of date palm is in: a. Iran b. Algeria c. U.S.A. d. Iraq
Last Answer : Iraq
Description : Canary date differs from cultivated date in a. Length of fronds b. Arrangement of pinnus c. Thickness of stem d. Area of origin
Last Answer : Thickness of stem
Description : Skirt in date palm fruit is a. Exocarp b. Merocarp c. Endocarp d. Seed
Last Answer : Endocarp
Description : Head in fire, foot in water is a proverb for a. Olive b. Coconut c. Date palm d. None
Last Answer : Date palm
Description : Pruning is a regular practice in date palm variety a. Hillawi b. Khudrawi c. Deglet Noor d. Hillini