Description : The process of converting hydrated Alumina into anhydrous Alumina is called
Last Answer : The process of converting hydrated Alumina into anhydrous Alumina is called A. Roasting B. Smelting C. Dressing D. Calcination
Last Answer : The process of converting hydrated Alumina into anhydrous Alumina is called A. roasting B. smelting C. dressing D. calcination
Description : Raw materials for nitric acid manufacture are (A) Hydrogen peroxide, air and water (B) Anhydrous ammonia and air (C) Anhydrous ammonia, air and water (D) Wet ammonia, air and water
Last Answer : (C) Anhydrous ammonia, air and water
Description : Thyroproxidase requires hydrogen peroxide as oxidizing agent. The H2O2 is produced by (A) FADH2 dependent enzyme (B) NADH dependent enzyme (C) NADP dependent enzyme (D) NADPH dependent enzyme
Last Answer : Answer : D
Description : Hydrogen peroxide (H2O2)-------? A. helps line up cell proteins B. is poisonous to tissues (Answer)
Last Answer : B. is poisonous to tissues (Answer)
Description : Nickel made/clad equipments are suitable for handling (A) Ammonia (both aqueous & anhydrous) (B) Fruit juices, milk & its products and caustic soda solution (C) Nitric acid & hydrochloric acid (concentrated) (D) Sulphuric acid (concentrated)
Last Answer : (B) Fruit juices, milk & its products and caustic soda solution
Description : Mild steel storage vessels are suitable for the storage of (A) Anhydrous ammonia (B) Fatty acids (C) Hydrochloric acid (95%) (D) Sulphuric acid (25%)
Last Answer : (A) Anhydrous ammonia
Description : Which one of the following is used to restore the colour of old oil-paintings? (1) Ozone (2) Hydrogen peroxide (3) Barium peroxide (4) Sodium peroxide
Last Answer : (2) Hydrogen peroxide Explanation: Hydrogen peroxide (H2O2) is the simplest peroxide (a compound with an oxygenoxygen single bond). It is also a strong oxidizer. Hydrogen peroxide is a clear ... capacity of hydrogen peroxide is so strong that it is considered a highly reactive oxygen species.
Description : Which one of the following is used to restore the colour of old oilpaintings ? (1) Ozone (2) Hydrogen peroxide (3) Barium peroxide (4) Sodium peroxide
Last Answer : Hydrogen peroxide
Description : Which one of the following is commonly used for pulp bleaching in the paper industry? (1) Mild sulphuric acid (2) Glucose isomerase (3) Hydrogen peroxide (4) Iodine and water
Last Answer : (3) Hydrogen peroxide Explanation: Bleaching of wood pulp is the chemical processing carried out to decrease the color of the pulp, so that it becomes whiter. Alkaline hydrogen ... responsible for absorbing visible light. The decomposition of hydrogen peroxide is catalyzed by transition metals.
Description : What does sulphuric acid plus barium hydroxide make?
Last Answer : acid plus air = nuclear power=weapon
Description : Why sulphuric acid is not used in preparation of carbon dioxide from calcium carbonate?
Last Answer : The formed calcium sulfate obtained as a product cover calciumcarbonate and stop the reaction.
Description : Write one laboratory method of preparation of hydrogen gas.
Last Answer : Ans-Generally prepared by the reaction of granulated zinc with dilute hydrochloric acid as under Zn(s)+2HCl ---ZnCl2 +H2 (g)
Description : Stains of rust on clothes can be removed by – (1) Oxalic acid (2) Petrol (3) Alcohol (4) H2O2
Last Answer : (1) Oxalic acid Explanation: Rust stains can be a challenge to remove because the stain consists of tiny iron oxide particles. Acidic solutions work best for these stains. The important ingredient in these ... the iron and loosen it from the fabric, then hold it in suspension in the wash water.
Description : Stains of rust on clothes can be removed by : (1) Oxalic acid (2) Petrol (3) Alcohol (4) H2O2
Last Answer : Oxalic acid
Description : If a material has the capacity to behave either as an acid or a base it is said to be: w) amorphous x) amphoteric y) anhydrous z) aklaline
Last Answer : ANSWER: X -- AMPHOTERIC
Description : Explain the laboratory method of preparation of Methane.
Last Answer : A mixture of sodium acetate and soda lime (NaOH + CaO) is heated in a hard glass test tube and methane gas is evolved. It is collected by the downward displacement of water. CH 3 COONA + NaOH CaO Na 2 CO 3 + CH 4
Description : An impression with elastomer in custom tray has been taken for crown preparation; it will be two days before the impression gets to the laboratory for construction of the crown. Which impression ... A. Polyether B. Thiokol or meraptan rubber C. Condensation silicone D. Vinyl polysiloxane
Last Answer : D. Vinyl polysiloxane
Description : Explain the laboratory procedure to determine the compressive strength of concrete cubes as per IS-516-1959 with reference to following points: i. Preparation of test specimen ii. Procedure of testing iii. Interpretation of results
Last Answer : Preparation of test specimen: i. Take three cubes of 15 cm sides and apply oil to its inner surface. ii. Prepare the concrete mixture of required grade and fill it in each mould in 3 layers. ... say 23N/mm 2) than the specified grade M20, then that concrete is safe and good for construction.
Description : The α-ketoacid is decarboxylated by H2O2 forming a carboxylic acid with one carbon atom less in the absence of the enzyme: (A) Catalase (B) Decarboxylase (C) Deaminase (D) Phosphatase
Last Answer : Answer : A
Description : The best way to clean a cavity before the placement of GIC is,** A. H2O2 B. Phosphoric Acid C. Polyacrylic acid 10% sturdavent 563pag
Last Answer : C. Polyacrylic acid 10% sturdavent 563pag
Description : Benzoyl chloride reacts with hydrogen in the presence of palladium and barium sulfate to give : (a) Benzyl alcohol (b) Benzaldehyde (c) Cinnamic acid (d) Benzophenone
Last Answer : Benzaldehyde
Description : Chemical composition of heavy water is – (1) H2O2 (2) H2O (3) HDO (4) D2O
Last Answer : (4) D2O Explanation: The chemical composition of Heavy water (deuterium oxide) is 2H2O or D2O.
Description : Which of the following reagents will react with pyrrole to form 2- formylpyrrole? (a) HCOOH (b) CHCl3/KOH (c) H2O2 (d) (CH3CO)2O/SnCl4
Last Answer : CHCl3/KOH
Description : In which following statement are correct. (a) Anhydrous hydrogen fluroide is a liquid at ordianry temperature while other halogen acid are gases. (b)
Last Answer : In which following statement are correct. (a) Anhydrous hydrogen fluroide is a liquid at ordianry temperature while other ... (B) b C. (C) c D. d
Description : Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C? (A) Silicone rubber, teflon, porcelain and wood (B) Nickel, monel, stainless steel and graphite (C) Aluminium, copper, high silicon iron (D) Brass, cast iron, mild steel and tin
Last Answer : (D) Brass, cast iron, mild steel and tin
Description : Reaction of anhydrous liquid ammonia with ortho-phosphoric acid produces (A) Ammonium phosphate (B) Superphosphate (C) Triple superphosphate (D) None of these
Last Answer : (A) Ammonium phosphate
Description : Methanol cannot be dried with anhydrous CaCl2 because - (1) CaCl2 dissolves in it (2) it is not good dehydrating agent (3) it forms a solid CaCl2 × 4CH3OH (4) it reacts with CH3OH
Last Answer : (3) it forms a solid CaCl2 × 4CH3OH
Description : Explain why anhydrous HCl is a bad conductor electricity while aqueous HCl is a good conductor of electricity.
Last Answer : Ans: Hcl is a covalent compound and has no ion but when dissolve into solution it under go dissociation and produce ions in the solution and hence conduct electricity.
Description : Benzene reacts with benzoyl chloride in the presence of anhydrous aluminium chloride to form (a) Benzyl chloride (b) Benzaldehyde (c) Benzal chloride (d) Benzophenone
Last Answer : Benzophenone
Description : 1,2-Ethanediol reacts with anhydrous zinc chloride to form (a) Ethylene (b) Acetaldehyde (c) Acetylene (d) Ethyl chloride
Last Answer : Acetaldehyde
Description : The percent composition by mass of copper in anhydrous cupric sulfate is about: w) 10% x) 25% y) 40% z) 75%
Last Answer : ANSWER: C -- 40%
Description : (4) A mixture of Fe₂O₃, 3H₂O and FeO Explanation: Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances. Rust consists of hydrated iron (III) oxides Fe2O
Last Answer : Catalyst is a substance which – (1) increases the rate of the reaction (2) decreases the rate of reaction (3) has no action on the rate of the reaction (4) None of these
Description : Whatis Zeolite? (1) Hydrated Aluminosilicate (2) Hydrated Calcium Sulphate (3) Dehydrated Aluminosilicate (4) Dehydrated Calcium Sulphate
Last Answer : (1) Hydrated Aluminosilicate Explanation: Zeolites are hydrated aluminosilicate minerals made from interlinked tetrahedra of alumina (AlO4) and silica (SiO4). In simpler words, they're solids with a ... as sodium, potassium, and magnesium) plus water molecules trapped in the gaps between them.
Description : What is observed (i) When a beam of light is pressed through a colloidal sol (ii) An electrolyte, NaCl is added to hydrated ferric oxide sol. (iii) Electric current is passed through colloidal sol.
Last Answer : Ans.: (i) Tyndal Effect (iv) Coagulation (v) Electrophoresis
Description : why Li salts are hydrated?
Last Answer : Li+ has maximum degree of hydration and for this reason lithium salts are mostly hydrated, e.g., LiCl· 2H2O
Description : What is Zeolite? (1) Hydrated Aluminosilicate (2) Hydrated Calcium Sulphate (3) Dehydrated Aluminosilicate (4) Dehydrated Calcium Sulphate
Last Answer : Hydrated Aluminosilicate
Description : What acid and what base are combined to produce barium sulfate?
Last Answer : The base is barium hydroxide and the acid is sulfuric acid.
Description : In human and other ureotelic organisms, the end product of amino acid nitrogen metabolism: (A) Bile acids (B) Ketone bodies (C) Urea (D) Barium sulphate
Last Answer : Answer : C
Description : Which of the following additives are added to plastics to make it impervious to X-rays? (A) Asbestos (B) Barium salt (C) Carborundum (D) Phthalic acid
Last Answer : (B) Barium salt
Description : how many atoms does H2O2?
Last Answer : 42 hydrogen and 2 oxygen
Description : Is H2O2 ionic or convalint?
Last Answer : Need answer
Description : Methemoglobin is formed as a result of the oxidation of haemoglobin by oxidation agent: (A) Oxygen of Air (B) H2O2 (C) K4Fe(CN)6 (D) KMnO4
Description : Reduced glutathione functions in R.B.Cs to (A) Produce NADPH (B) Reduce methemoglobin to hemoglobin (C) Produce NADH (D) Reduce oxidizing agents such as H2O2
Last Answer : D
Description : H2O2 is precursor of A A. free radicals B. Enzyme C. Both D. None of these
Last Answer : free radicals
Description : Oxidase enzymes responsible for producing H2O2 are present in a. Mitochondria b. Ribosomes c. Peroxisomes d. Polysomes
Last Answer : Peroxisomes
Description : 12 years old child presents with symptoms of widespread gingivitis with bleeding and general malaise for several weeks. How would you manage this patient? M07 ********* A. Prescribe ... mouth wash. C. Give a prophylaxis with ultra sonic scaling D. Refer for haematological screening
Last Answer : D. Refer for haematological screening