CBSE Discussions Recent Questions
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Assertion : Carbon Reacts With Oxygen To Form Carbon Dioxide Which Is An Acidic Oxide. Reason : Non-Metals Form Acidic Oxides
CBSE DiscussionsModified 5 Year Ago
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Assertion : Platinum, Gold And Silver Are Used To Make Jewellery. Reason : Plantinum, Gold And Silver Are Reactive Least Metals.
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Assertion : Food Cans Are Coated With Tin And Not With Zinc. Reason : Zinc Is More Reactive Than Tin
CBSE DiscussionsModified 5 Year Ago
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Assertion : When Zinc Is Added To A Solution Of Iron (II) Sulphate, No Change Is Observed. Reason : Zinc Is Less Reactive Than Iron.
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Assertion : Electrical Wires Cannot Be Made By Copper. Reason : Copper Is A Bad Conductor Of Electricity
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An Alloy Is
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Galvanisation Is A Method Of Protecting Iron From Rusting By Coating It With A Thin Layer Of
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Silver Articles Become Black On Prolonged Exposure To Air. This Is Due To The Formation Of
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Metals Are Refined By Using Different Methods
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Which Of The Following Metal Will Not Give H2(g) With H2O?
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Which Of The Following Is Not A Property Of Non-metals?
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Which Of The Following Only Contain Non-metals?
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The Composition Of Aqua-regia Is
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A Reactive Metal (M) Is Treated With H2SO4 (dil).
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Which Of The Following Is A Characteristic Of Metals?
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What Happens When Calcium Is Treated With Water?
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Which Of The Following Reaction Shows That The Given Oxide Is Amphoteric In Nature?
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The Ability Of Metals To Be Drawn Into Thin Wire Is Known As
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Which Of The Following Metal Has Highest Melting Point?
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(i) A Chemical Compound X Is Used In (ii) How Many Molecules Of Water Of (iii) How Will You Prepare The Above Compound
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In The Following Schematic Diagram For The Preparation Of Hydrogen Gas As Shown In The Figure
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(i) Define A Universal Indicator (ii) Solution A Gives Pink Colour (iii) Name One Salt Whose Solution Has PH
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Assertion : On Heating, Gypsum Gets Converted Into Plaster Of Paris. Reason : Gypsum Loses Water Molecules On Heating At 373 K Temperature
CBSE DiscussionsModified 5 Year Ago
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Assertion : The PH Of Sodium Chloride Solution Is Seven Reason : Salt Of Strong Acid And A Strong Base Are Acidic In Nature
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The PH Of A Solution Is 5.0. Its Hydrogen Ion Concentration Is Decreased By 100 Times, The Solution Will Be:
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The PH Of A Solution Is 4.0. What Should Be The Change In The Hydrogen Ion Concentration Of The Solution, If Its PH Is To Be Increased To 5.0.
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An Acid (A) With Sodium Hydrogencarbonate Is Used In Making The Cakes Fluffy And Spongy
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