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Science Quiz – Assertion & Reason (Chapter 1-4)

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Welcome to your Science Quiz – Assertion & Reason (Chapter 1-4)

Assertion (A): the colour of aqueous solution of copper sulphate turns colourless when a piece of lead is added to it. Reason (R): Lead is more reactive than copper and hence it displaces copper from its salt solution.

Both Assertion and Reason are true and Reason is correct explanation of Assertion

Both Assertion and Reason are true and Reason is not the correct explanation of Assertion

Assertion is true but Reason is false

Assertion is false but Reason is true

Assertion (A): Slaking of lime is an exothermic and combination reaction Reason (R): Quick lime reacts with water to produce slaked lime

Both A and R are true and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is True

Assertion (A): Decomposition of vegetable matter into compost is an endothermic reaction. Reason (R): Decomposition reaction involves breakdown of a single reactant into simpler products.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): When HCl is added to zinc granules, a chemical reaction occurs. Reason (R): Evolution of gas and change in colour indicate that the chemical reaction is taking place.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Iron articles are painted so as to prevent them from rusting. Reason (R): When the surface of iron is coated with paint, its surface doesnot come in direct contact with oxygen and moisture, therefore rusting doesnot take place.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Silver Bromide decomposition is used in black and white photography. Reason (R): Light provides energy for this exothermic reaction

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Glucose combines with oxygen in the cells of our body and provides energy. Reason (R): Reaction in which heat or energy is released along with the formation of products are called as exothermic reactions

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): We keep food in air tight containers. Reason (R): Fat/Oil containing food substances become rancid and their smell taste changes.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): 2Na + H2 —-> 2NaH. In the above equation, sodium is getting oxidised and H2 is getting reduced. Reason (R): the chemical reaction in which oxidation and redution takes place simultaneously is called redox reaction.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): White Silver chloride turns grey in sunlight. Reason (R): Decomposition od silver chloride in presence of sunlight takes place to form silver metal and chlorine gas.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): HCl produces hydronium ions (H3O+) and chloride ions (Cl-) in aqueous solution. Reason (R): In presence of water, basic solution give H+ ions.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Sodium hydroxide reacts with zinc to produce hydrogen gas. Reason (R): Acids react with active metals to produce hydrogen gas.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): It is advised that while diluting an acid, one should add water to acid and not acid to water keeping the solution continously stirred. Reason (R): The process of dissolving an acid into water is highy exothermic.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Phenophthalene gives pink colour in basic solution. Reason (R): Phenophthalene is a natural indicator.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Fresh milk in which baking soda is added, takes longer time to set as curd. Reason (R): Baking soda decreases the pH value of fresh milk to below 6.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The pH of sodium chloride is seven. Reason (R): The value of pH ranging from 0 to 14.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): On heating gypsum gets converted to plaster of paris. Reason (R): Gypsum loses water molecules on heating at 373K temperature.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Pure water is neither acidic nor basic. Reason (R): The pH of a solution is inversely proportional to the concentration of hydrogen ions in it.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Oxides of metals show basic characters. Reason (R): Oxides of metals react with acids to form salt and water.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): In the following reaction, ZnO+ C ——-> Zn + CO, ZnO undergoes reduction. Reason (R): Carbon is the reducing agent that reduces ZnO to Zn.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Food cans are coated with Tin and not with Zinc. Reason (R): Zinc is more reactive than Tin.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Carbon reacts with oxygen to form carbon dioxide, which is an acidic oxide. Reason (R): Non0metals form acidic oxides.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Alloys are commonly used in electrical heating devices like electric iron and heater. Reason (R): Alloys have lower melting points than their constituent metals.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): A piece of zinc metal gets reddish brown coating when kept in copper sulphate solution for sometime. Reason (R): Copper is more reactive metal then zinc.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Zinc carbonate is heated strongly in the presence of air to form zinc oxide and carbon dioxide. Reason (R): calcination is the process in which a carbonate ore is heated strongly in the absence of air to convert into metal oxide.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Magnesium chloride is ionic compound. Reason (R): Metals and Non-metals react by mutual transfer of electrons.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Highly reactive metals are obtained by electrolytic reduction. Reason (R): In electrolytic reduction, metal is deposited at the cathode.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Hydrogen is not a metal but it has been assigned a place in the reactivity series of metals. Reason (R): Hdrogen has a tendency to lose electron and forms a positive ion H+.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): When lead vessel is kept in a solution of Zinc sulphate, lead will remain unaffected. Reason (R): Lead is less reactive than Zinc

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Zinc becomes dull in moist air. Reason (R): Zinc is coated by thin film of its basic carbonate in moist air.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Carbon has a strong tendency to either lose or gain electrons to attain noble gas configuration. Reason (R): Carbon has four elements in its outermost shell and has tendency to share electrons with carbon or other elements.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Carbon shows maximum catenation property in the periodic table. Reason (R): Carbon has small size and thus forms strong C-C bond.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Graphite is slippery to touch. Reason (R): The various layers of carbon atoms in graphite are held together by weak van der waals forces.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Following are the members of a homologous series: CH3OH, CH3CH2OH, CH3CH2CH2OH. Reason (R): A series of compounds with same functional group but differing by -CH2- unit called a homologous series.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): When ethanol is heated at 443K with excess conc. H2SO4, ethene is obtained. Reason (R): Conc. H2SO4 acts as a dehydrating agent.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): The functional group present in alchohols is -OH. Reason (R): It is the same group as present in water, hence, water and alchohol have similar properties.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Vegetable oils are healthier than animal fats. Reason (R): Vegetable oils generally have long unsaturated carbon chains while animal fats have saturated carbon chains.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): If the first member of homologous series is propanone, its third member will be 2-pentanone. Reason (R): All the members of homologous series show similar chemical properties.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Cooking oil doesnot decolourize bromine water. Reason (R): Cooking oil is an unsaturated compound.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Ethanoic acid is also known as glacial acetic acid. Reason (R): The melting point of pure ethanoic acid is 290K and hence it often freezes during winters in cold climates.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Diamond doesnot conduct electricity. Reason (R): Diamond has high refractive Index.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): Alchohol cannot be used as an additive in petrol. Reason (R): Alchohol give rise to CO2 and H2O when burnt in sufficient air.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Assertion (A): In a candel, wax vapours burn in sufficient supply of oxygen, which leads to blue flame. Reason (R): When the oxygen supply is sufficient, then fuels burn completely producing a blue flame.

Both A and R are True and R is correct explanation of A

Both A and R are True and R is not the correct explanation of A

A is true but R is false

A is false but R is true

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