Description : Red phosphorous is changed into white phosphorous by (A) Heating in presence of light (B) Melting under pressure (C) Vaporisation followed by condensation (D) None of these
Last Answer : (C) Vaporisation followed by condensation
Description : White phosphorous is stored under water, because (A) It does not react with water (B) It is poisonous (C) Its kindling temperature in dry air is very low (D) It is unstable
Last Answer : (C) Its kindling temperature in dry air is very low
Description : White phosphorous on reaction with `NaOH` gives `PH_(3)` and
Last Answer : White phosphorous on reaction with `NaOH` gives `PH_(3)` and A. `Na_(2)HPO_(3)` B. `NaH_(2)PO_(2)` C. `NaH_(2)PO_(3)` D. `Na_(3)PO_(4)`
Description : The product formed in the reaction of `SOCl_2` (thionyl chloride) with white phosphorous is.
Last Answer : The product formed in the reaction of `SOCl_2` (thionyl chloride) with white phosphorous is. A. `PCl_(3)` B. `SO_(2)Cl_(2)` C. `SCl_(2)` D. `POCl_(3)`
Description : The product obtained after the heating of White Phosphorous at a high temperature is?
Last Answer : Black Phosphorous
Description : White phosphorous burns in atmosphere at?
Last Answer : 30°C
Description : White phosphorous is kept in?
Last Answer : Water
Description : Heavy duty bearings are usually made of (A) White metal (B) Phosphorous bronze (C) Monel (D) Zinc
Last Answer : (A) White metal
Description : Bearings subjected to light load are made of (A) White metal (B) Phosphorous bronze (C) Monel (D) Silicon bronze
Last Answer : (B) Phosphorous bronze
Description : Bush bearings are made of (A) Mild steel (B) Phosphorous bronze (C) White metal alloys (D) None of these
Description : Both white phosphorous as well as red phosphorous (A) Are soluble in CS2 (B) Burns when heated in air (C) Reacts with hot caustic soda solution to give Phosphine (D) All (A), (B), and (C)
Last Answer : (B) Burns when heated in air
Description : Maximum stability of white phosphorous is at (A) Very high pressure (B) Atmospheric pressure (C) Room temperature (D) > 600°C
Last Answer : (D) > 600°C
Description : Reaction of phosphate rock with 98% H2SO4 produces (A) Ortho-phosphoric acid (B) Superphosphate (C) White phosphorous (D) None of these
Last Answer : (A) Ortho-phosphoric acid
Description : Pick out the wrong statement. (A) 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid (B) Chemically unreactive nature of ... in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation
Last Answer : (C) Red phosphorous is the most reactive allotropic form of phosphorous
Description : The most stable allotropic form of phosphorous is the __________ phosphorous. (A) White (B) Black (C) Yellow (D) Red
Last Answer : (B) Black
Description : Which of the following does not come under the category of ‘primary nutrient' for plant growth? (A) Potassium (B) Nitrogen (C) Phosphorous (D) Sulphur
Last Answer : (D) Sulphur
Description : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : Which of the following is used in pencils? A.Graphite B.Silicon C.Charcoal D.Phosphorous -Science
Last Answer : answer is A. Graphite
Description : What are the chemical signals of phosphorous acid ?
Last Answer : : Chemical signal of phosphorous acid H3PO3
Description : Phosphorous has the oxidation state of `+3` in :
Last Answer : Phosphorous has the oxidation state of `+3` in : A. Phosphorus acid B. Orthophosphoric acid C. Meta phosphoric acid D. Pyro phosphoric acid
Description : Phosphorous has the oxidation state of +1 in:
Last Answer : Phosphorous has the oxidation state of +1 in: A. Phosphorous acid `(H_(3)PO_(3))` B. Orthophosphoric acid ... phosphoric acid `(H_(4)(P_(2)O_(6))`
Description : The product obtained when propanamide is distilled with phosphorous pentoxide is `(CH_3CH_(2)CO)_(2)O`
Last Answer : The product obtained when propanamide is distilled with phosphorous pentoxide is `(CH_3CH_(2)CO)_(2)O` A. `CH_(3) ... . `(CH_(3)CH_(2)COO)_(3)PO` D.
Description : Given below are some properties. How many of these can hold good for phosphorous (a) Metal (b) Non- metal (c) Metalloid (d) Exhibits allotropy (e) Cat
Last Answer : Given below are some properties. How many of these can hold good for phosphorous (a) ... electricity (h) Least dense among nitrogen family elements
Description : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, `PCl_(5)` as well as `PCl_(5)` are possible. It is due to
Last Answer : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, ... P in solid while N in gaseous state at room temperature
Description : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, `PCl_(5)` are possible. It is due to
Last Answer : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, ... In solid while N in gaseous state at room temperature.
Description : `S_(1):(HPO_(3))_(n)` can be prepared by heating phosphorous acid and bromine in a sealed tube. `S_(2)` : dry iodine reacts with ozone and formed yell
Last Answer : `S_(1):(HPO_(3))_(n)` can be prepared by heating phosphorous acid and bromine in a sealed tube. `S_(2)` : ... below 369 K. A. FTF B. TTF C. TTT D. TFF
Description : Why is phosphorous referred to as a local cycle?
Last Answer : Potatk
Description : Which element has more protons iron or phosphorous?
Last Answer : The number of protons an element has is given by its Atomic Number in the Periodic TableThe Atomic Number of Iron = 26The Atomic Number of Phosphorus = 15
Description : Renal ricket is caused by renal tubular defect (usually inherited) which interferes with reabsorption of (A) Calcium (B) Phosphorous (C) Sodium (D) Chloride
Last Answer : Answer : B
Description : A nucleotide consists of (A) A nitrogenous base like choline (B) Purine + pyrimidine base + sugar + phosphorous (C) Purine or pyrimidine base + sugar (D) Purine or pyrimidine base + phosphorous
Description : A nucleoside consists of (A) Nitrogenous base (B) Purine or pyrimidine base + sugar (C) Purine or pyrimidine base + phosphorous (D) Purine + pyrimidine base + sugar + phosphorous
Description : A high concentration of PTH in blood causes (A) Increase in plasma calcium and inorganic phosphorous (B) Decrease in plasma calcium and inorganic phosphorous (C) Increase in plasma calcium ... in plasma inorganic phosphorous (D) Decrease in plasma calcium and increase in plasma inorganic phosphorous
Last Answer : Answer : C
Description : The characteristic of hyperparathyroidism is (A) Low serum calcium (B) High serum phosphorous (C) Low serum calcium and high serum phosphorous (D) High serum calcium and low serum phosphate
Last Answer : Answer : D
Description : Calcitonin causes (A) Calcinuria and phosphaturia (B) Decrease in urinary calcium (C) Decrease in urinary phosphorous (D) Increase in blood calcium level 212 MCQs IN BIOCHEMISTRY
Last Answer : Answer : A
Description : When phosphorous level is lowered ? (A) In hyper thyroidism (B) Cirrosis of liver (C) Leukemia (D) Hypothyroidism
Description : The normal serum inorganic phosphorous level is (A) 1.5–2.5 mg/100 ml (B) 2.5–4.5 mg/100 ml (C) 4.5–6.5 mg/100 ml (D) 0.5–1.5 mg/100 ml
Description : Absorption of phosphorous from diet is favoured by (A) Moderate amount of fat (B) Acidic environment (C) High calcium content (D) High phytic acid
Description : Daily requirement of phosphorous for an infant is (A) 240–400 mg (B) 1.2 gms (C) 800 mg (D) 800–1200 mg
Description : Serum inorganic phosphorous decreases in all the following conditions except (A) Hyperparathyroidism (B) Intestinal malabsorption (C) Osteomalacia (D) Chronic renal failure
Description : Serum inorganic phosphorous rises in all the following conditions except (A) Hypoparathyroidism (B) Hypervitaminosis D (C) Chronic renal failure (D) After a carbohydrate-rich meal MINERAL METABOLISM 197
Description : The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) is decreased in (A) Rickets (B) Hypoparathyroidism (C) Hyperparathyroidism (D) Renal failure
Description : The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) in children is about (A) 30 (B) 40 (C) 50 (D) 60
Description : The product of serum calcium concentration (mg/dl) and serum inorganic phosphorous concentration (mg/dl) in adults is about (A) 30 (B) 40 (C) 50 (D) 60
Description : The correct statement about serum inorganic phosphorous concentration is (A) It is higher in men than in women (B) It is higher in women than in men (C) It is higher in adults than in children (D) It is higher in children than in adults
Description : Psychotic symptoms and parkinsonism like symptoms develop due to inhalation poisoning of (A) Manganese (B) Phosphorous (C) Magnesium (D) Zinc
Description : An acquired siderosis-Bantu siderosis is due to (A) Foods cooked in iron pots (B) Diet high in phosphorous (C) Diet high in calcium (D) High fat diet