Description : What is the most common salt in sea water? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate
Last Answer : (3) Sodium chloride Explanation: Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the formula NaCl, representing equal proportions of sodium and ... for the salinity of the ocean and of the extracellular fluid of many multi-cellular organisms.
Description : What is the most common salt in sea water ? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate
Last Answer : Sodium chloride
Description : Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of (A) Calcium sulphate (B) Sodium chloride (C) Sodium sulphate (D) Magnesium chloride
Last Answer : (B) Sodium chloride
Description : Cooking liquor in case of sulphite process is (A) Sodium sulphite and sodium bisulphite (B) Magnesium sulphite and free SO2 in acid medium (C) Magnesium sulphate and magnesium bicarbonate (D) None of these
Last Answer : (A) Sodium sulphite and sodium bisulphite
Description : Which of the following is very reactive and kept in kerosene? (1) Sodium (2) Potassium (3) Iodine (4) Bromine
Last Answer : (1) Sodium Explanation: Sodium is a very reactive metal. It reacts vigorously with oxygen and water. A lot of heat is generated in this process. Therefore, it is stored in kerosene to avoid contacts between either atmospheric oxygen or water.
Last Answer : Sodium
Description : What two compounds make magnesium sulphate?
Last Answer : Many combinations of compounds could make magnesium sulfate:magnesium hydroxide and sulfuric acidmagnesium oxide and sulfuric acidmagnesium hydroxide and sulfur trioxideetc.
Description : Gypsum is chemically (A) Calcium chloride (B) Potassium sulphate (C) Sodium sulphate (D) Calcium sulphate
Last Answer : (D) Calcium sulphate
Description : Which of the following is responsible for permanent hardness of water? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate
Last Answer : (3) calcium sulphate Explanation: Permanent hardness is caused by dissolved calcium sulfate (which is not removed by boiling). Hard water contains dissolved magnesium and calcium ions. These make ... . Temporary hardness is caused by dissolved calcium hydrogen carbonate (which is removed by boiling)
Description : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride
Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl
Description : Which of the following is responsible for permanent hardness of water ? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate
Last Answer : calcium sulphate
Description : __________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation. (A) Magnesium (B) Potassium (C) Calcium (D) Sodium
Last Answer : (A) Magnesium
Description : The ‘stone’ formed in human kidney consist mostly of-------? A. Calcium oxalate (Answer) B. Sodium acetate C. Magnesium sulphate D. Calcium
Last Answer : A. Calcium oxalate (Answer)
Description : Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric ... Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate
Last Answer : 1. Copper oxide - CuO 2. Iron (III) chloride - FeCl3 3. Sodium hydroxide - NaOH 4. Iron (II) sulphide - FeS 5. Lead (II) oxide - PbO 6. Hydrogen nitrate (nitric acid) - HNO3 7. ... ) - H2SO4 8. Calcium hydroxide - Ca(OH)2 9. Magnesium carbonate - MgCO3 10.Ammonium carbonate - (NH4)2CO3
Description : Which one is the major component of Bordeaux mixture a) Copper sulphate b) Sodium chloride c) Calcium chloride d) Magnesium sulphate
Last Answer : a) Copper sulphate
Description : Which of the following is not soluble in water? (1) Lead Sulphate (2) Zinc sulphate (3) Potassium sulphate (4) Sodium sulphate
Last Answer : (2) Zinc sulphate Explanation: Lead sulfate (PbSO4) is a white crystalline solid. It is insoluble in water and sinks in it. It is often seen in the plates/electrodes of car batteries, as it is ... is discharged. It is also known as fast white, milk white, sulfuric acid lead salt or anglesite.
Description : Which of the following is not soluble in water ? (1) Lead Sulphate (2) Zinc sulphate (3) Potassium sulphate (4) Sodium sulphate
Last Answer : Zinc sulphate
Description : When ethanol is heated with concentrated H2SO4, a gas is produced. Which of the following compounds is formed when this gas is treated with bromine in CCl4?E2 (a) Bromomethane (b) 1,2-Dibromoethane (c) Bromoethane (d) 1,1,2,2-Tetrabromoethane
Last Answer : 1,2-Dibromoethane
Description : The name of the common mineral salt present in sweat is ? A. Calcium Oxalate B. Potassium Sulphate C. Sodium Chloride (Answer) D. Iron Sulphate E. None of these
Last Answer : C. Sodium Chloride (Answer)
Description : Which of the salt in the mineral mixture or food can prevent the subject from goiter D A. Cobalt Chloride B. Sodium Chloride C. Iron Sulphate D. Potassium Iodide
Last Answer : Potassium Iodide
Description : The permanent preservative, which is used for preservation of fruit and vegetables, is— (A) Sodium chloride (B) Potassium metabisulphate (C) Potassium sulphate (D) Sugar
Last Answer : (B) Potassium metabisulphate
Description : The two metal ions that cause hardness to water are: (1) Calcium, Magnesium (2) Sodium, Calcium (3) Sodium, Potassium (4) Sodium, Magnesium
Last Answer : (1) Calcium, Magnesium Explanation: Calcium and magnesium ion cause hardness of water.
Description : The presence of which of the following salts in water causes corrosion in steam boilers? (1) Sodium Chloride (2) Magnesium Chloride (3) Calcium bicarbonate (4) Potassium bicarbonate
Last Answer : (2) Magnesium Chloride Explanation: Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. These salts are typical ionic halides, being highly soluble in water.
Description : Alkalinity in water may be caused due to (A) Calcium and magnesium bicarbonates (B) Sodium carbonate (C) Potassium carbonate (D) All the above
Last Answer : (D) All the above
Description : Hardness of water is caused by (A) Presence of soap lather (B) Presence of chlorides and sulphates of sodium and potassium (C) Presence of bicarbonates, sulphates or chlorides of calcium and magnesium (D) Turbidity
Last Answer : (C) Presence of bicarbonates, sulphates or chlorides of calcium and magnesium
Description : Which of the following would be least soluble in water? w) Carbon Tetrachloride x) Sodium Oxide y) Magnesium Bromide z) Potassium Phosphate
Last Answer : ANSWER: W -- CARBON TETRACHLORIDE
Last Answer : Calcium, Magnesium
Description : Which metal is extracted from sea water? (1) Potassium (2) Magnesium (3) Aluminium (4) Beryllium
Last Answer : Magnesium
Description : Cardiac arrest may occur due to over doses of (A) Sodium (B) Potassium (C) Zinc (D) Magnesium
Last Answer : Answer : B
Description : The principal cation in intracellular fluid is (A) Sodium (B) Potassium (C) Calcium (D) Magnesium
Description : The principal cation in extracellular fluid is (A) Sodium (B) Potassium (C) Calcium (D) Magnesium
Last Answer : Answer : A
Description : The following ions help in enzymatic transfer of phosphate from ATP to pyruvic acid: (A) Sodium (B) Calcium (C) Magnesium (D) Potassium
Last Answer : Answer : D
Description : The action of digitalis is enhanced by (a) Sodium (b) Calcium (c) Magnesium (d) Potassium (e) Chloride
Last Answer : Ans: B
Description : Which of the following is involved in blood clotting? A. Sodium B. Magnesium C. Potassium D. Calcium
Last Answer : ANSWER: D
Description : Sodium chloride, potassium chloride, magnesium oxide are examples of molecules with (a) Covalent bonding (b) Ionic bonding (c) Metallic bonding (d) Hydrogen bonding
Last Answer : Ans:(b)
Description : What is contained in Chlorophyll? (1) Sodium (2) Potassium (3) Manganese (4) Magnesium
Last Answer : (4) Magnesium Explanation: The basic structure of a chlorophyll molecule is a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in hemoglobin, ... was discovered in 1906, and was the first time that magnesium had been detected in living tissue.
Description : Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine
Last Answer : (4) Sodium to Chlorine Explanation: The elements which lose electrons to form cations are known as metals. Metallic character decreases across a period as we move from left to right.
Description : Rock salt is a mineral containing – (1) potassium (2) magnesium (3) sodium (4) iron
Last Answer : (3) sodium Explanation: Halite, commonly known as rock salt, is the mineral form of sodium chloride (NaCl). Halite forms isometric crystals. It commonly occurs with other evaporite deposit minerals such as several of the sulfates, halides, and borates.
Description : Following mineral is an essential part of the haemoglobin D A. Magnesium B. Potassium C. Sodium D. Iron
Last Answer : Iron
Description : The following have a lower concentration in the cerebrospinal fluid (CSF) than plasma: a. glucose b. sodium c. potassium d. magnesium
Last Answer : magnesium
Description : The metals with very low melting points which melts by the temperature of palm are A) Sodium and potassium B) Lead and magnesium C) Aluminium and zinc D) Gallium and caesium
Last Answer : D) Gallium and caesium
Description : Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction. (a) Calcium (b) Magnesium (c) Sodium (d) Potassium
Last Answer : (a) Calcium
Description : Which is the principal cation in the plasma of the blood? (a) Potassium (b) Magnesium (c) Calcium (d) Sodium
Last Answer : d) Sodium
Description : Which of the following elements is responsible for maintaining turgor in cells? (a) Magnesium (b) Sodium (c) Potassium (d) Calcium
Last Answer : (c) Potassium
Description : Which of the following elements is responsible for maintaining turgor in cells ? (1) Magnesium (2) Sodium (3) Potassium (4) Calcium
Last Answer : (3) Potassium
Description : What is contained in Chlorophyll ? (1) Sodium (2) Potassium (3) Manganese (4) Magnesium
Description : Rock salt is a mineral containing (1) potassium (2) magnesium (3) sodium (4) iron
Last Answer : sodium