Description : Dental caries occur due to (A) Drinking water containing less than 0.2 ppm of fluorine (B) Drinking water containing greater than 1.2 ppm of fluorine (C) Drinking water containing high calcium (D) Drinking water containing heavy metals
Last Answer : Answer : A
Description : Fluorosis is caused due to (A) Excessive intake of fluorine (B) Low intake of fluorine (C) Discoloration of the teeth due to low intake (D) All of these
Description : Presence of excess fluorine in water causes (A) Dental cavity (B) Tooth decay (C) Fluorosis (D) Respiratory disease
Last Answer : (C) Fluorosis
Description : Upper safe limit of fluorine in water is (A) 0.4 ppm (B) 0.8 ppm (C) 1.2 ppm (D) 2 ppm
Last Answer : Answer : C
Description : Fluorosis is caused due to the presence of excessive amount of __________ in drinking water. (A) Mercury (B) Lead (C) Fluoride (D) Arsenic
Last Answer : (C) Fluoride
Description : Irrigation water containing more than —- ppm Boron is harmful to crops a. 0.5 b. 1 c. 2 d. 3
Last Answer : d. 3
Description : Drinking of mineral water with very low levels of pesticides (about 0.02 ppm) for long periods may:
Last Answer : Drinking of mineral water with very low levels of pesticides (about 0.02 ppm) for long ... . cause leukaemia D. Produce immunity against mosquito.
Description : TLV of mercury in potable (drinking) water is about __________ ppm. (A) 0.001 (B) 0.1 (C) 1 (D) 5
Last Answer : (A) 0.001
Description : Infection of Ascaris usually occurs by (a) Tse-tse fly (b) mosquito bite (c) drinking water containing eggs of Ascaris (d) eating imperfectly cooked pork
Last Answer : (c) drinking water containing eggs of Ascaris
Description : A gas used as a disinfectant in drinking water is - (1) Hydrogen (2) Oxygen (3) Fluorine (4) Chlorine
Last Answer : (4) Chlorine Explanation: Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water.
Description : When the concentration of SO2 in air is greater than __________ ppm, it gives a pungent smell. (A) 0.01 (B) 0.1 (C) 1 (D) 4
Last Answer : (D) 4
Description : Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air. (A) Hydrocarbons (B) Hydrogen fluoride (C) Hydrogen sulphides (D) Nitrogen dioxide
Last Answer : (B) Hydrogen fluoride
Description : What is the valency of fluorine in calcium fluoride?
Last Answer : 1. This is answerI have another question to ask youWhat is the valency of calcium in calcium flouridePlease can you answer to my question
Description : ________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant. (A) Calcium (B) Fluorine (C) Phosphorous (D) Sulphur
Last Answer : (B) Fluorine
Description : Which micromineral is essential for the production of the thyroid hormones? a. calcium c. fluorine b. iodine d. magnesium
Last Answer : b. iodine
Description : Teeth and Bones acquire strength and rigidity from (1) Calcium (2) Fluorine (3) Chlorine (4) Sodium
Last Answer : Calcium
Description : Which of the following is pollution related disorder? (a) Silicosis (b) Pneumonicosis (c) Fluorosis (d) Leprosis
Last Answer : (c) Fluorosis
Description : Pick out the wrong statement. (A) Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty (B) Large ... vegetables (D) Cereal crops grown on alkaline soil absorb higher amount of fluorides thereby spreading fluorosis
Last Answer : (C) Application of large excess of Potassic fertiliser in soil increases the valuable carotene in fruits and vegetables
Description : Persons working in cement plants and limestone quarries are more prone to disease like (A) Cancer (B) Asthma (C) Silicosis (D) Fluorosis (bone disease)
Last Answer : (C) Silicosis
Description : Two conditions of enamel facilitate the post eruptive uptake of fluoride: A. Hyper mineralisation and surface dentine B. Surface demineralisation and hypo mineralisation C. Dental fluorosis and enamel opacities
Last Answer : B. Surface demineralisation and hypo mineralisation
Description : A patient has improperly formed DEJ, reduction in size of pulp chamber, chipping and attrition of enamel that would MOSTLY be: A. Fluorosis B. Amelogenesis imperfecta C. Dentinogenesis imperfecta
Last Answer : C. Dentinogenesis imperfecta
Description : Black cotton soils are a) Heavy clay soils varying from clay to Loam, with clay content of 40 to 50% formed by decomposition of rocks by long continued weathering* b) Compacted and ... underneath d) Dark brown earthy materials formed due to partial or complete decomposition of vegetable matter
Last Answer : a) Heavy clay soils varying from clay to Loam, with clay content of 40 to 50% formed by decomposition of rocks by long continued weathering*
Description : Atomic number of which of the following elements is greater than that of Fluorine? (1) Sodium (2) Beryllium (3) Nitrogen (4) Boron
Last Answer : (1) Sodium Explanation: Sodium has higher atomic number (11) than Fluorine (9) The atomic number of Beryllium and Nitrogen are 4 and 7 respectively.
Description : Quicksand is a) Moist sand containing a small percentage of clay b) Is a condition which generally occurs in coarse sands c) Is a condition in which cohesive properties of soil increase rapidly d) Is a condition in which a cohesion less soil loses its strength because of upward flow of water
Last Answer : d) Is a condition in which a cohesion less soil loses its strength because of upward flow of water
Description : For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm. (A) 10000 (B) 5 (C) 500 (D) 1000
Last Answer : (B) 5
Description : Pick up the correct statement from the following: (A) Water with hardness upto 75 ppm is considered soft (B) Water with hardness more than 200 ppm is considered hard (C) Water needed for laundries should contain hardness less than 75 ppm (D) All the above
Last Answer : (D) All the above
Description : Materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators, are known as A. Thermistors B. Varistors C. Semi-conductors D. Variable resistors.
Last Answer : Materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators, are known as Semi-conductors.
Description : _______are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
Last Answer : Semi-conductors are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
Description : The high reactivity of fluorine is due to (a) Its high electronegativity (b) Small size of flourine atom (c) Availability of d-orbitals (d) Strong F-F bond
Last Answer : Ans:(a)
Description : The high reactivity of fluorine is due to (1) small size of fluorine atom (2) its high electro negativity (3) availability of d-orbitals (4) strong F - F bond
Last Answer : (2) its high electro negativity Explanation: The high reactivity of fluorine is due to its high electro negativity.
Description : he high reactivity of fluorine is due to?
Last Answer : :its high electro negativity
Description : When the nurse notes that the post cardiac surgery patient demonstrates low urine output (< 25 ml/hr) with high specific gravity (> 1.025), the nurse suspects: a) Inadequate fluid volume Urine ... by high urine output with low specific gravity. d) Anuria The anuric patient does not produce urine.
Last Answer : a) Inadequate fluid volume Urine output of less than 25 ml/hr may indicate a decrease in cardiac output. A high specific gravity indicates increased concentration of solutes in the urine which occurs with inadequate fluid volume.
Description : What type of wear occurs due to an interaction of surfaces due to adhesion of the metals? a) Adhesive wear b) Abrasive wear c) Fretting wear d) Erosive wear
Last Answer : a) Adhesive wear
Description : Heavy proteinuria occurs in (A) Acute glomerulonephritis (B) Acute pyelonephritis (C) Nephrosclerosis (D) Nephrotic syndrome
Last Answer : B
Description : Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2 . Lead pipes are readily corroded by (A) Dilute HCI (B) Acetic acid (C) Concentrated H2SO4 (D) None of these
Last Answer : (B) Acetic acid
Description : Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2 . Lead pipes are readily corroded by (A) Dilute HCl (B) Acetic acid (C) Concentrated H2SO4 (D) None of these
Description : The element needed in quantities greater than 100 mg for human beings is (A) Calcium (B) Zinc (C) Selenium (D) Cobalt
Description : The deficiency in rain catch due to vertical acceleration of air forced upward over the gauge, is (A) Greater for heavy rain (B) Greater for lighter rain (C) Greater for large drops (D) Lesser for small rain drops
Last Answer : Answer: Option B
Description : When the enamel of the tooth is exposed to preparation containing high concentrations of fluoride the major reaction is: M07 A. Sodium fluoride B. Calcium fluoride C. Stannous fluoride D. Fluoroapatite
Last Answer : D. Fluoroapatite
Description : The nurse teaches the patient with gastroesophageal reflux disease (GERD) which of the following measures to manage his disease? a) Avoid eating or drinking 2 hours before bedtime. The patient should not ... blocks. d) Eat a low carbohydrate diet The patient is instructed to eat a low-fat diet
Last Answer : a) Avoid eating or drinking 2 hours before bedtime. The patient should not recline with a full stomach.
Description : Give uses of heavy water. Can heavy water be used for drinking?
Last Answer : Ans-It is used as moderator and to study the reaction mechanism.
Description : Crystallisation of insulin occurs in the presence of (A) Chromium (B) Copper (C) Zinc (D) Calcium
Description : Intestinal absorption of calcium occurs by (A) Active takeup (B) Simple diffusion (C) Facilitated diffusion (D) Endocytosis
Description : Heavy water is used as a coolant in nuclear reactors. Heavy water is (1) water rich in minerals (2) ozonised water (3) water containing minerals of heavy metal (4) water containing heavy isotope of hydrogen
Last Answer : water containing heavy isotope of hydrogen
Description : Meat is rich in all of the following except (A) Iron (B) Fluorine (C) Copper (D) Zinc
Last Answer : Answer : B
Description : P,Q, R and S are four metals whose typical reaction are given below (I) (II) When Q is added to a solution containing the ions of the other metals, me
Last Answer : P,Q, R and S are four metals whose typical reaction are given below (I) (II) When Q is added to a solution ... P lt S` D. `Q lt P lt S lt R`
Description : Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel
Last Answer : (A) Invar
Description : Exposure to SO2 containing chimney gases results in the (A) Reduction in strength of leather & cloth (B) Acceleration of corrosion rates of metals (C) Increased drying & hardening time of paints (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : How can wet carbon dioxide be responsible for a corrosion problem in iron-containing metals?
Last Answer : Carbon dioxide reacts with water according to the following equation: CO2 + H2O -> HCO3- + H+ As the concentration of CO2 increases, so does the concentration of the H+ ion. This ion ... ions produced can react with the bicarbonate ions to form ferrous carbonate, which precipitates as a scale.