Description : Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by ... Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide
Last Answer : (D) Red color is imparted to glass by addition of arsenic oxide
Description : Type of glass used in optical work is the __________ glass. (A) Soda-lime (B) Fibre (C) Lead (D) Borosilicate
Last Answer : (C) Lead
Description : Which of the following is resistant to the action of both heat & chemicals? (A) Borosilicate glass (B) Silica glass (C) Soda lime glass (D) None of these
Last Answer : (A) Borosilicate glass
Description : Sodium calcium silicate is called _______. (1) Hard glass (2) Borosilicate glass (3) Soft glass (4) Jena glass
Last Answer : (3) Soft glass Explanation: Ordinary glass which is also known as soda glass or soft glass is a mixture of sodium silicate, Calcium silicate, and Silica.
Description : __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C. (A) Borosilicate (B) High silica (C) Supermax (D) Lead
Last Answer : (C) Supermax
Description : Hydrofluoric acid is not kept in glass bottles because it reacts with - (1) visible light (2) silicon dioxide of glass (3) aluminium oxide of glass (4) sodium oxide of glass
Last Answer : (2) silicon dioxide of glass
Description : __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. (A) Pyrex (B) Soda lime (C) Lead (D) High silica
Last Answer : (A) Pyrex
Description : Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance. (A) Flint (B) Soda (C) Pyrex (D) Potash
Last Answer : (C) Pyrex
Description : Which glass is usually used in optical work? (A) Lead glass (B) High silica (borosilicate) glass (C) Photo-sensitive glass (D) Fibre glass
Last Answer : (C) Photo-sensitive glass
Description : Common house hold glass (i.e., soda-lime glass) is a/an __________ material. (A) Fully crystalline (B) Partly crystalline (C) Amorphous
Last Answer : (B) Partly crystalline
Description : Pick out the wrong statement. (A) High early strength cement are made from materials having high silica to lime ratio (B) The function of gypsum in cement is to enhance its initial ... cements are known as silicate cement (D) Major component of greyish Portland cement is tricalcium silicate
Last Answer : (A) High early strength cement are made from materials having high silica to lime ratio
Description : Glass lined vessels are not used for handling (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCI (D) Hydrofluoric acid
Last Answer : (D) Hydrofluoric acid
Description : Glass lined vessels are not used for handling/storing (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCl (D) Hydrofluoric acid
Description : Lime water reacts with chlorine to give a) bleaching powder b) baking powder c) baking soda d) washing soda
Last Answer : a) bleaching powder
Description : At what temperature is glass fused to steel in the making of glass-lined equipment? The borosilicate glass is typically fused to carbon steel at a temperature of about 800 0C. 87. What are some typical applications for glass-lined reactors?
Last Answer : Glass-lined equipment gives superior protection to all mineral acids at all concentration and temperatures. One exception is hydrofluoric acid. They are also used is high-purity processes where cleanliness ... to the walls of the vessels while glass-lined vessels have good anti-stick properties.
Description : Sand and __________ is fused at 1300°C, to produce sodium silicate. (A) Limestone (B) Soda ash (C) Coke (D) Sodium sulphate
Last Answer : (B) Soda ash
Description : Fusion point of coal ash increases with increase in its __________ content. (A) Iron sulphate (B) Iron silicate (C) Lime and magnesia (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Is hydrofluoric acid attacking glass and etching designs in glass a physical change?
Last Answer : No, it is a chemical change. The glass is changed into newsubstances where it is etched.
Description : Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by __________, which decompose to give free radicals. (A) Organic peroxides (B) Sulphuric acid (C) Hydrofluoric acid (D) None of these
Last Answer : (A) Organic peroxides
Description : The major constituents of glass are (A) Lime, clay and soda ash (B) Sand, lime and soda ash (C) Silica, alumina and clay (D) Silica, alumina and soda ash
Last Answer : (B) Sand, lime and soda ash
Description : The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to (A) Polarization (B) Conductivity (C) Structural homogeneties (D) Ionization
Last Answer : The presence of alkali oxides in alumino silicate ceramics is likely to result in dielectric breakdown due to Conductivity
Description : What happens when: a) When a mixture of sodium acetate and soda lime is heated in a hard glass test tube.
Last Answer : Methane gas is evolved. CH 3 COONA + NaOH CaO Na 2 CO 3 + CH 4 b) Methane is burnt in air or oxygen or methane undergoes complete combustion. It forms carbon dioxide and water. CO 2 + H ... ultraviolet light (sunlight). Organic product chloromethane is formed CH 4 + Cl 2 UV CH 3 Cl + HCl
Description : Soda lime glass is
Last Answer : colourless.
Description : Why injectables should not be stored in soda lime glass containers?
Last Answer : Soda lime glass container is not used for the storage of parenterals because: i. It yields an appreciable quantity of alkali to water. ii. Flakes separate comparatively easily. iii. On ... 's relatively high coefficient of expansion makes it liable to fracture with sudden changes of temperature.
Description : State the uses (two each) of the following construction materials: i) Soda lime glass ii) Ferrous metal
Last Answer : i) Soda lime glass: a) Used in window and plate glass b) Glass blocks c) Bottles d) Inexpensive table wares e) Fluorescent and incandescent light bulbs ii) Ferrous metal: a) CI (Cast Iron) ... GI sheets f) Carbon steel is used for making tools g) Weld meshes are used for partition and fencing
Description : Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? (A) Sodium silicate (B) Sodium borate (C) Sodium tripolyphosphate (STPP) (D) Caustic soda
Last Answer : (B) Sodium borate
Description : Which of the following is not used as a surface active agent in a flocculation operation? (A) Sodium silicate (B) Quartz (C) Lime (D) Alumina
Last Answer : (B) Quartz
Description : is lime acid alkali aur neutral?
Last Answer : Answers is the place to go to get the answers you need and to ask the questions you want
Description : In which soils, lime is used as soil amendment ? (A) Alkali (B) Acid (C) Saline (D) Saline-Alkali solis
Last Answer : (B) Acid
Description : __________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness
Last Answer : (C) Temporary hardness
Description : Brackish water which contains mostly dissolved salt, can be purified by the __________ process. (A) Reverse osmosis (B) Sand filter (C) Lime soda (D) Permutit
Last Answer : (A) Reverse osmosis
Description : Major component of flint glass is (A) Lead oxide (B) Silica (C) Alumina (D) Soda
Last Answer : (A) Lead oxide
Description : Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C? (A) Monel (B) Stainless steel (C) Graphite (D) Kel-F and Teflon
Last Answer : (B) Stainless steel
Description : Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and (A) Sulphuric acid (B) Phosphoric acid (C) Hydrochloric acid (D) Hydrofluoric acid
Last Answer : (A) Sulphuric acid
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 : Dicalcium silicate a) Hydrates rapidly b) Generate less heat of hydration* c) Hardens rapidly d) Reacts with water only
Last Answer : b) Generate less heat of hydration*
Description : When the ore haematite is burnt in air with coke around `2000 K` along with lime, the process not only produces steel but also produces a silicate sla
Last Answer : When the ore haematite is burnt in air with coke around `2000 K` along with lime, the process not only produces ... 3)` C. `SiO_(2)` D. `CaCO_(3)`
Description : The fire clay contains pure (A) Lime (B) Oxide of iron (C) Hydrated aluminium silicate (D) Magnesium
Description : Cement is usually a mixture of : (1) Calcium silicate and calcium aluminate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide
Last Answer : Calcium silicate and calcium aluminate
Description : Which of the following if present in iron ore, enhances its value? (A) Alumina (B) Alkali oxide (C) Lime & Magnesia (D) None of these
Last Answer : C) Lime & Magnesia
Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry
Last Answer : i hope it helped you
Description : A monocarboxylic acid decolourise `Br_(2) - H_(2)O`, on heating with soda lime derivate of styrene is formed , with neutral `FeCl_(3)` , a buff colour
Last Answer : A monocarboxylic acid decolourise `Br_(2) - H_(2)O`, on heating with soda lime derivate of styrene is formed , ... . Acid could be : A. B. C. D.
Description : What is the reaction between soda lime and acetic acid?
Last Answer : The chemical reaction is:Ca(OH)2 + 2 CH3COOH - Ca(CH3COO)2 + 2 H2O
Description : Is hydrofluoric acid ionic or covalent bonding?
Last Answer : What is the answer ?
Description : Which one of the following acids is used in battery? (1) Hydrochloric acid (2) Hydrofluoric acid (3) Sulphuric acid (4) Sulphurous acid
Last Answer : (3) Sulphuric acid Explanation: Battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy. Possessing different chemical properties ... domestic acidic drain cleaner, electrolyte in lead-acid batteries and various cleaning agents.
Description : During preparation of amorphous silicon, the product is washed with hydrofluoric acid to
Last Answer : remove unreacted silica.
Description : What is the role of the following in the extraction of amorphous silicon? a) Hydrochloric acid b) hydrofluoric acid
Last Answer : a) Hydrochloric acid is used to dissolve magnesium oxide b) Hydrofluoric acid is used to remove unreacted silica
Description : Which of the following is the weakest acid? w) hydrochloric acid x) hydrofluoric acid y) sulfuric acid z) nitric acid
Last Answer : ANSWER: X -- HYDROFLUORIC ACID
Description : Which one of the following acids is used in battery ? (1) Hydrochloric acid (2) Hydrofluoric acid (3) Sulphuric acid (4) Sulphurous acid
Last Answer : Sulphuric acid