When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is
The maximum amount of BaSO4 that can be obtained on mixing 0.5 mole BaCl2 with 1 mole H2SO4 is
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Benzene reacts with CH₃COCl in the presence of AlCl₃ to give
Which reaction sequence would be best to prepare 3-choloraniline from benezene ?
Which of the following is formed when toluene reacts with fuming nitric acid?
What is the rate of a reaction in mol-L⁻1-s⁻1in a first order reaction, if its half-life period is 693 s, and its concentration is 2 mol-L⁻1?
The effect of temperature on the rate constant is given by
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Inversion of cane sugar is catalysed by invertase from yeast.
Reason(R): The conversion of starch into maltase is catalysed by diastase.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Hard water is more suitable than soft water for laundary and dying.
Reason(R): Hard water can be used in steam boilers.
Two moles of an ideal gas are compressed at 300 K from a pressure of 1 atm to a pressure of 2 atm. The change in free energy is
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): PbS is roasted in air and when it is partially converted into oxide, it is further heated in absence of air.
Reason(R): Excess air can form higher oxides.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In the volumetric estimation of iron (II) in acid solution in the presence of excess chloride by titration with permaganate solution , excess phosphoric acid and manganese (II) sulphate are added to the solution containing iron (II) before the titration .
Reason(R): Phosphoric acid complexes the iron (III) produced by the oxidation , and manganese (II) depresses the reduction potential of permanganate.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): For caogulating AS2 , S3 , Al3 + ions an better than Na⁺ ions.
Reason(R): Size of Al3 + is smaller than Na⁺.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A) : Mercuric chloride is known as corrosive sublimate.
Reason(R) : Mercuric chloride is extremely poisonous substance.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Sulphur cross links are present in vulcanised ruber.
Reason(R): Vulcanisation is a free radical initated chain reaction.
In the following question, a Statement-1 is given followed by a corresponding Statement-2 just below it. Read the statements carefully and mark the correct answer-
Statement-1: Alkali metals dissolve in liquid ammonia to give blue solutions.
Statement-2: Alkali metals in liquid ammonia give solvated species of the type [M(NH3)n]+ (M = alkali metals).
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Addition of NH4OH to an aqueous solution of BaCl2 in the presence of NH4Cl(excess) precipitates Ba(OH)2.
Reason(R): BA(OH)2 is insoluble in water
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Sedatives are given to patients who are mentally agitated and violet.
Reason(R): Sedatives can suppress the activities of central nervous system .
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Annulene is not aromatic though it contains Huckel number of π-electrons.
Reason(R): Steric interaction between internal hydrogens makes it non-planar.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): SeCl4 does not have tetrahedral structure
Reason(R): Se in SeCl4 has two lone pairs
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The molality of a solution changes with change in temperature.
Reason(R): The molality is moles of substance dissolved 1 kg of solvent.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A):H⁺ ion has a very high polarising power.
Reason(R):Size of H⁺ ion is very small.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A):Baeyer's process the only concentration method used for aluminium.
Reason(R):Red bauxite contains iron oxide which is removed in Baeyer's process.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Antiseptics can be applied to living tissues.
Reason(R): Iodine is a well known antiseptic.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): d-orbital is double dumbell orbital is 0,1,2.
Reason(R): The allowed value of l for d-orbital is 0,1,2.
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Propadiene is optically active.
Reason(R): Propadiene has a plane of symmetry.
3 videos|44 docs|66 tests
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3 videos|44 docs|66 tests
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