Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.
Last Answer : What is the objective of the 'Kyoto Protocol'? (1) To abolish child labour (2) To eliminate nuclear weapons (3) To increase ground water levels (4) To reduce greenhouse gases
Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic. a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.
Last Answer : Cement is usually a mixture of – (1) Calcium silicate and calcium alurninate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide
Description : When Calcium reacts with water it starts floating on top of water because A) bubbles of carbon dioxide formed stick to the surface of metal B) bubbles of hydrogen formed stick to the surface of metalC) Calcium is lighter than water D) None of the above
Last Answer : B) bubbles of hydrogen formed stick to the surface of metal
Description : Consider the following statements: 1. Caffeine, a constituent of tea and coffee is a diuretic 2. Citric acid is used in soft drinks. 3. Ascorbic acid is essential for the formation of bones and teeth. 4. Citric Acid is a good ... 2 only (b) 1, 2 and 3 only (c) 3 and 4 only (d) 1, 2, 3 and 4
Last Answer : Ans:(a)
Description : The answer to this question is very interesting.
Last Answer : I don't know, but if someone describes it will I know?
Description : ________ does not react with dilute hydrochloric acid but reacts with sulphuric acid and does not liberate hydrogen gas. a) iron b)copper c)gold d)zinc
Last Answer : b)copper
Description : Cement is said to be of good quality if (A) Its colour is not greenish grey (B) One feels cool by thrusting one's hand in the cement bag (C) A handful of cement thrown into a bucket of water does not float (D) None of these
Last Answer : Answer: Option D
Description : The Classical example of redox reaction is Combustion of fossil fuel. During combustion of fossil fuels, the carbon compound in the fossil fuel reacts with oxygen in the presence of a heat source to ... to react with oxygen, so the energy used in portion of combustion is an endothermic reaction.
Last Answer : Combustion of fossil fuel
Description : When I am sad, I change colour from white to grey. My tears fall to the ground and my cries are low and rumbling. In my anger I send great flashes of light above. What am I? -Riddles
Last Answer : A cloud.
Description : What do you understand by the word regur ? (a) Black soil found in the Deccan (b) Grey-brown soil found in Russia (c) Red, colour sticky soil, found in the Amazon area (d) Black soil found in northern Argentina shop.ssbcrack.com
Last Answer : Ans: (a)
Description : Which colour is formed when Red and Green are mixed? (1) Light blue (2) Yellow (3) White (4) Grey
Last Answer : (2) Yellow Explanation: Red, green and blue are the primary colors and all other colors can be created from them. When red and green combine, the result is yellow.
Description : A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,
Last Answer : Answer: (c) White, BaSO4
Description : Stefan-Boltzmann law applies to __________ body. (A) Black (B) White (C) Grey (D) Any colour
Last Answer : (A) Black
Description : Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is (A) Black (B) Silver grey (C) Green (D) Yellow
Last Answer : ) Silver grey
Description : Pick out the wrong statement. (A) Wrought iron contains about 0.02% carbon (B) Wrought iron cannot be easily forged and welded (C) The chilled cast iron does not contain graphite (D) Spheroidal grey cast iron contains graphite flakes
Last Answer : (B) Wrought iron cannot be easily forged and welded
Description : A `C_(6)H_(12)O` compound does not react with `Br_(2)` in `C Cl_(4)`, produces a flammable gas on treatment with `LiAlH_(4)`, and reacts with `H_(2)Cr
Last Answer : A `C_(6)H_(12)O` compound does not react with `Br_(2)` in `C Cl_(4)`, ... B. methoxycyclopentane C. 2-cyclopropyl-2-propanol D. 2-cyclobutylethanol
Description : A chlorine atom reacts with a sodium atom to form sodium chloride, NaCl. A chlorine atom can also react with another chlorine atom to form a chlorine molecule, Cl2. Which statement BEST explains the behavior of chlorine in these two reactions?
Last Answer : A chlorine atom can form ionic bonds by accepting an electron and covalent bonds by sharing electrons.
Description : Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc
Last Answer : a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. The reactivity of magnesium is higher than that of zinc. Hence it reacts with hydrochloric acid more vigorously. b) ... acid than magnesium and zinc As iron has lowest reactivity when compare to magnesium and zinc.
Description : A problem solver is a style of problem solving reflected by the manager (a) Who confronts the problem, reacts to it, and makes those changes necessary solve it. (b) Who notices a problem and does ... problems so that corrective action can be taken before the problem grows. ; (d) None of the above
Last Answer : (a) Who confronts the problem, reacts to it, and makes those changes necessary solve it.
Description : 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
Last Answer : brown bottles stops the passage of light through it
Description : What is the soft tissue in the center of bones that produces blood sells?
Last Answer : That would be bone marrow.
Description : Accumulation of crystalline depositions in articular surfaces, bones, soft tissue, and cartilage is referred to as a) tophi. Tophi, when problematic, are surgically excised. b) subchondral bone. Subchondral ... refers to the escape of fluid from the blood vessels or lymphatics into the joint cavity.
Last Answer : a) tophi. Tophi, when problematic, are surgically excised.
Description : What would react more quickly in the air a pile of grain or a cloud of grain dust Explain?
Last Answer : What is the answer ?
Description : One advantage of non-price competition is that: A)a firm can react quickly to competitive efforts. B)market share becomes less important. C)a firm can build customer loyalty. D)pricing is no longer a success factor.
Last Answer : C)a firm can build customer loyalty.
Description : `H_(2)S` reacts with lead acetate forming black compound which reacts with `O_(3)` to form another compound Y. The colour of the compound Y is:
Last Answer : `H_(2)S` reacts with lead acetate forming black compound which reacts with `O_(3)` to form another compound ... : A. black B. violet C. white D. green
Description : Which of the following metals reacts violently with water? (A) Mercury (B) Sodium (C) Calcium (D) Magnesium
Last Answer : Option B
Description : The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Last Answer : Answer: Option C
Description : The first compound which reacts with water when mixed with cement is (a) Tricalcium Aluminate (b) Tricalcium silicate (c) Di-calcium silicate (d) Teracalcium aluminate
Last Answer : (a) Tricalcium Aluminate
Description : Most of calcium is present in bone, but 2% present in soft tissue and the blood is called (A) Calcinated blood (B) Solidified blood (C) Physiological blood(D) Colloidal blood
Last Answer : Answer : C
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 : Give scientific reason of the following : a) Colour blindness is more common in men than in women b) Light coloured clothes are generally worn in summer c) A person is hurt more when he falls ... ground than on soft d) Deforestation causes more floods e) The man-hole covers are generally round
Last Answer : a) Colour blindness is more common in men than in women Women have the sex chromosomes XX, while men have the chromosomes XY. The gene for normal colour vision is found on the X- ... of flowing water. When these trees are cut the natural barriers ultimately vanish and more floods are caused
Description : The percentage of the total body calcium present in bones is (A) 1 (B) 11 (C) 55 (D) 99
Last Answer : Answer : D
Description : All the following statements regarding calcium are correct except (A) It diffuses as a divalent cation (B) It freely diffuses across the endoplasmic reticulum of muscle cells (C) It can exist in the blood as ionic form and also protein bound (D) It is found in high concentration in bones
Last Answer : Answer : B
Description : The major calcium salt in bones is (A) Calcium carbonate (B) Calcium chloride (C) Calcium hydroxide (D) Calcium phosphate
Description : The following proportion of the total body calcium is present in bones and teeth: (A) 75% (B) 90% (C) 95% (D) 99%
Description : Which of the following statements best describes the usual course of rheumatoid arthritis? (a) It is an acute exacerbation of joint pain treated with short-term anti-inflammatory therapy (b) It is ... characterized by a marked loss of calcium from the bones and a resultant thinning of the bones
Last Answer : Ans: D
Description : The main chemical substance present in the bones and teeth of animals is: A. Sodium Chloride B. Sugar C. Calcium Phosphate D. Calcium sulphate
Last Answer : ANSWER: C
Description : The main chemical substance present in the bones and teeth of animal is (a) sodium chloride (b) sugar (c) calcium phosphate (d) calcium sulphate
Last Answer : Ans:(c)
Description : Which of the following is primarily composed of calcium carbonate? (1) Fish scales (2) Shark teeth (3) Oyster Shes (4) Whale bones
Last Answer : (3) Oyster Shes Explanation: There is a high content of calcium carbonate in mussel andoyster shells, which can be used in the formulation of medicine, in construction or as filler in polymer materials.
Description : The chemical substance present in bones and teeth is - (1) Calcium phosphate (2) Calcium chloride (3) Calcium sulphate (4) Calcium borate
Last Answer : (1) Calcium phosphate Explanation: Seventy percent of bone consists of hydroxyapatite, a calcium phosphate mineral (known as bone mineral). Tooth enamel is composed of almost ninety percent hydroxylapatite.
Description : The chemical name of "Plaster of Paris" commonly used for setting broken bones is – (1) Calcium nitrate (2) Calcium sulphate (3) Calcium carbonate (4) Calcium chloride
Last Answer : (2) Calcium sulphate Explanation: Plaster of Paris is the common name of Calcium Sulphate hemihydrate, with chemical formula: CaSO4.1/2H2O. Plaster of Paris is produced by heating gypsum to about 150°C.
Last Answer : (1) Calcium phosphate Explanation: Seventy percent of bone consists of hydroxyapatite, a calcium phosphate mineral. (known as bone mineral). Tooth enamel is composed of almost ninety percent hydroxylapatite.
Description : What is the main component of bones and teeth? A. Calcium carbonate B. Calcium phosphate (Answer) C. Calcium sulphate D. Calcium nitrate
Last Answer : B. Calcium phosphate (Answer)
Description : What is the main component of bones and teeth? A.Calcium carbonate B.Calcium phosphate C.Calcium sulphate D.Calcium nitrate
Last Answer : B.Calcium phosphate
Description : What is the primary CONSTITUENT of human bones? w) Calcium sulfate x) Calcium carbonate y) Hydroxyapatite (pron: high-drox-ee-ap-eh-tite) z) Chloroapatite (pron: klor-o-ap-eh-tite)
Last Answer : ANSWER: Y -- HYDROXYAPATITE
Description : Which of the following is primarily composed of calcium carbonate? w) Fish scales x) Shark teeth y) Oyster Shells z) Whale bones
Last Answer : ANSWER: Y -- OYSTER SHELLS
Description : Teeth and Bones acquire strength and rigidity from (1) Calcium (2) Fluorine (3) Chlorine (4) Sodium
Last Answer : Calcium
Description : The chemical name of “Plaster of Paris” commonly used for setting broken bones is (1) Calcium nitrate (2) Calcium sulphate (3) Calcium carbonate (4) Calcium chloride
Last Answer : Calcium sulphate
Description : The chemical substance present in bones and teeth is (1) Calcium phosphate (2) Calcium chloride (3) Calcium sulphate (4) Calcium borate
Last Answer : Calcium phosphate
Description : Do "caffeine-free" soft drinks still contain caffeine?
Last Answer : I wouldn’t think so. Caffiene isn’t listed as one of the ingredients, so the company would definitely be lieing.