Description : Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide
Last Answer : a)sulphur dioxide
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 : Which of the following non-metal reacts and catches fire on exposure to air? a) phosphorous b)nitrogen c)sulphur d)hydrogen
Last Answer : a) phosphorous
Description : _______ being a very light metal is used for making aircraft bodies . a) aluminium b)copper c)zinc d)iron
Last Answer : a) aluminium
Description : The property due to which a metal can be hammered into thin sheets without breaking is _______. a) malleability b)ductility c)tensile strength d)conductivity
Last Answer : a) malleability
Description : Which of the following is not property of an alloy? a) strong b)resistant to corrosion c)hard d)Poor conductor of electricity
Last Answer : d)Poor conductor of electricity
Description : One of the practical application of platinum is a) electrical cables c)decorating food stuff b) cooking vessel d)dentistry
Last Answer : d)dentistry
Description : Aluminium is used in making aircraft because a) malleable b)light c)both i and ii d)none of the above
Last Answer : b)light
Description : The non-metal used in batteries is a) phosphorous b)nitrogen c) carbon d)sulphur
Last Answer : c) carbon
Description : The composition of brass alloy is a) copper b)copper and gold c)copper and zinc d)tin and zinc
Last Answer : c)copper and zinc
Description : Which metal among the following melts below 30^0 C. a) copper b)aluminium c)gold d)caesium
Last Answer : d)caesium
Description : Which of the following is not property of sodium metal? a) lustre b)hard c)low melting point d)solid at room temperature.
Last Answer : c)low melting point
Description : The correct sequence of steps involved in extraction of metal from its ore is a) removal of impurities, purify metal, reduction of ore b) purify metal, removal of impurities, reduction of metal ore . c ... of metal , reduction d) removal of impurities from ore , reduction of ore , refining of metal
Last Answer : d) removal of impurities from ore , reduction of ore , refining of metal
Description : Metals are generally hard, which of the following metal is an exception and can be cut with a knife? a) iron b)sodium c)gold d)magnesium
Last Answer : b)sodium
Description : Rohan had learnt that non-metals on beating with hammer are generally broken into pieces. Which of the following is a non-metal? a) iron nail b)aluminium wire c)copper wire d)piece of coal
Last Answer : d)piece of coal
Description : ________ is an alloy made from iron , chromium and nickel . a) stainless steel b)steel c)brass d)bronze
Last Answer : a) stainless steel
Description : A homogenous mixture of two or more metal or a metal and non-metal is known as _____. a) alloy b)element c)mineral d)compound
Last Answer : a) alloy
Description : Silver is used for high precision electrical contacts in computer due to its property of ______. a) malleability b)conductivity c)ductility d)none
Last Answer : b)conductivity
Description : The purity of gold is expressed in terms of ____ ___. a)carat b)ounce c)pound d)none
Last Answer : a)carat
Description : Germanium is an example of ____________. a) metal b)metalloid c)non-metal d)none
Last Answer : b)metalloid
Description : Example of non-metal which exist in solid state is __________ . a) sulphur b)bromine c)chlorine d)oxygen
Last Answer : a) sulphur
Description : ________ is naturally occurring inorganic substance found deep under the surface of the earth. a) ore b)mineral c)metal d)non-metal
Last Answer : b)mineral
Description : __________ metal is liquid at room temperature . a) mercury b)iron c)copper d)silver
Last Answer : a) mercury
Description : Metallic oxides which react with both acid and base to produce salt and water are called A) Neutral Oxides B) Basic Oxides C) Amphoteric Oxides D) Acidic Oxides
Last Answer : C) Amphoteric Oxides
Description : 1.5 mol of `O_(2)` combines with Mg to form oxide MgO. The mass of Mg (at. Mass 24) that has combined is
Last Answer : 1.5 mol of `O_(2)` combines with Mg to form oxide MgO. The mass of Mg (at. Mass 24) that has combined is A. 72 g B. 36 g C. 24 g D. 94 g
Description : (3) preventing rapid setting of cement Explanation: Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates, the remainder consisting of ... mixed with water by way of a complex series of chemical reactions still only partly understood.
Last Answer : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved
Description : Acid Reacts with metals and released............gas. (a) Carbon di oxide (b) Water (c) Hydrogen (d) None
Last Answer : (c) Hydrogen
Description : An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts with chlorine gas a poisonous gas (E) is evolve. This g
Last Answer : An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts ... hybridization D. The compound `F=NH_(2)CONH_(2)`
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 : An alkali metal salt of Palmitic acid is known as (A) Soap (B) Metallic soap (C) Detergent (D) Alkaloid
Last Answer : (B) Metallic soap
Description : Sodium salt of higher molecular weight fatty acid is termed as the __________ soap. (A) Hard (B) Soft (C) Metallic (D) Lubricating
Last Answer : (B) Soft
Description : Shaving soaps are (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property (B) Metallic soaps compounded with frothing agents (C) High free alkali soaps having excess of cane sugar and alcohol (D) None of these
Last Answer : (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property
Description : Which of the following is a metallic salt of a fatty acid? Is it: w) soap x) plastic y) rubber z) petroleum
Last Answer : ANSWER: A -- SOAP
Description : From the standpoint of safety, you should never allow salt water to enter a leadacid storage battery or come in contact with sulfuric acid because ______________. A. the resulting gas is ... peroxide D. combining salt water with lead-acid creates an invisible gas resulting in severe corrosion
Last Answer : Answer: B
Description : What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? .
Last Answer : What would be the produt formed when 1-bromo-3 chorocyclobutane reacts with two equivalents of metallic sodium in ether ? . A. B. C. D.
Description : Aniline reacts with nitrous acid at low temperatures to give (a) a N-nitrosoamine (b) a nitrile (c) a diazonium salt (d) a nitrite salt
Last Answer : a diazonium salt
Description : A white crystaline oxide (A) having garlic smell reacts with cold water to form a compound (B). On heating, (B) gives compound (C) & gas (D). Which of
Last Answer : A white crystaline oxide (A) having garlic smell reacts with cold water to form a compound (B). On ... ) can act as a reducing agent but (C) cannot
Description : Hard disk is coated in both side with A) Magnetic metallic oxide B) Optical metallic oxide C) Carbon layer D) All of the above
Last Answer : Answer : A
Description : Hard disk is coated in both sides with A) Magnetic metallic oxide B) Optical metallic oxide C) Carbon layer D) All of the above
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 : Hard disk is coated in both side above a. Magnetic metallic oxide b. Optical metallic oxide c. Carbon layer d. All of the above
Last Answer : Magnetic metallic oxide
Last Answer : a. Magnetic metallic oxide
Description : Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. ... (B) Law of constant proportions (C) Law of multiple proportions (D) Law of equivalent proportions
Last Answer : (C) Law of multiple proportions
Description : Ozone reacts with dry iodine to form an oxide having ____oxygen atoms in its molecules.
Last Answer : Ozone reacts with dry iodine to form an oxide having ____oxygen atoms in its molecules.
Description : During smelting process, the combination of fuel in the furnace (A) Forms carbon dioxide (B) Carbon dioxide with carbon forms carbon mono-oxide (C) Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2 (D) All the above
Last Answer : Answer: Option D
Description : An organic base (X) reacts with nitrous acid at `0^(@)C` to give a clear solution. Heating the solution with KCN and cuprous cyanide followed by conti
Last Answer : An organic base (X) reacts with nitrous acid at `0^(@)C` to give a clear solution. Heating the solution with ... solid. "X" is : A. B. C. D.
Description : A nucleophile acts as a __________ when it reacts with an electrophile. (a) Bronsted-Lowry acid (b) Arrhenius base (c) Lewis acid (d) Lewis base
Last Answer : Lewis base
Description : An electrophile acts as a __________ when it reacts with a nucleophile. (a) Bronsted-Lowry base (b) Arrhenius base (c) Lewis acid (d) Lewis base
Last Answer : Lewis acid
Description : What is formed when zinc reacts with sodium hydroxide? (a) Zinc hydroxide and sodium (b) Sodium zincate and hydrogen gas (c) Sodium zinc-oxide and hydrogen gas (d) Sodium zincate and water
Last Answer : (b) Sodium zincate and hydrogen gas