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Reduction of the metal centre in aqueous permanganate ion involves {MULTI CHOICE CORRECT}
29.2%(w/w) HCl stock solution has a density of 1.25g/ml. The molecular weight of HCl is 36.5g/mol. The volume (mL) of stock solution required to prepare a 200 mL solution of 0.4 M HCl is?
In acidic medium, 100ml of 0.01M KMnO_{4} solution oxidizes 100ml H_{2}O_{2} solution. The volume of 0.01M KMnO_{4} solution required to oxidize the same volume of H_{2}O_{2} in alkaline medium in ml is:
The molality of a urea solution in which 0.0100 g of urea, [(NH_{2})_{2}CO] is added to 0.3000 dm^{3} of water at STP is:
For the estimation of nitrogen, 1.4g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60mL of M/10 sulphuric acid. The unreacted acid required 20mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is
Hydrogen Peroxide can act as both oxidizing and reducing agent depending upon the nature of the reacting species. In which of the following cases does H_{2}O_{2} act as a reducing agent in acidic medium.
2.5 mL of 2M/5 weak monoacidic base (K_{b} = 1×10^{–12} at 25^{0} C) is titrated with 2M/15 HCl in water at 25^{0} C. The concentration of H^{+} at equivalence point is (K_{w}=1×10^{–14} at 25^{0} C)
The density of a solution prepared by dissolving 120 g of urea (mol. Mass = 60 u ) in 1000g of water is 1.15 g/mL. The molarity of this solution is :
Consider the following list of reagents: Acidified K_{2}Cr_{2}O_{7}, alkaline KMnO_{4}, CuSO_{4}, H_{2}O_{2}, Cl_{2}, O_{3}, FeCl_{3}, HNO_{3} and Na_{2}S_{2}O_{3}. The total number of reagents that can oxidise aqueous iodide to iodine is
A gaseous hydrocarbon gives upon combustion 0.72 g of water and 3.08 g of CO_{2}. The empirical formula of the hydrocarbon is:
A metal nitride contains 28% nitrogen by weight. The molecular formula of metal nitride is M_{3}N_{2}. What is the atomic weight of the metal?
Hydrogen peroxide, in its reaction with KIO_{4} and NH_{2}OH respectively, is acting as a
The density (in g/mL) of a 3.60 M sulphuric acid solution that is 29 % H_{2}SO_{4} (Molar mass = 98 g/mol) by mass will be
The number of molecules of CO_{2} liberated by the complete combustion of 0.1 gram atom of graphite in air is :
Dissolving 120 g of a compound (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/ml. The molarity of the solution is :
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]]>Alcohol
An alcohol is any organic compound in which the hydroxyl functional group (–OH) is bound to a saturated carbon atom. Alcohols are usually classified as primary, secondary and tertiary alcohols.
Phenol
Phenol, also known as carbolic acid, is an aromatic organic compound with the molecular formula C_{6}H_{5}OH. It is a white crystalline solid that is volatile. The molecule consists of a phenyl group (−C_{6}H_{5}) bonded to a hydroxyl group (−OH). It is mildly acidic.
Preparation of Alcohols
From Haloalkanes
From Reduction of Aldehydes and ketones
From Reduction of Carboxylic acid and esters
From Grignard Reagent
From hydration of alkenes
From Oxymercuration and Demercuration of Alkenes
From Aliphatic Primary Amines
Preparation of Phenols
From haloarenes: Chlorobenzene is an example of haloarenes which is formed by mono substitution of benzene ring. When chlorobenzene is fused with sodium hydroxide at 623K and 320 atm sodium phenoxide is produced. Finally, sodium phenoxide on acidification gives phenols.
From benzene sulphonic acid: Benzenesulphonic acid can be obtained from benzene by reacting it with oleum. Benzenesulphonic acid thus formed is treated with molten sodium hydroxide at high temperature which leads to the formation of sodium phenoxide. Finally, sodium phenoxide on acidification gives phenols.
From diazonium salts: When an aromatic primary amine is treated with nitrous (NaNO_{2} + HCl) acid at 273 – 278 K, diazonium salts are obtained. These diazonium salts are highly reactive in nature. Upon warming with water, these diazonium salts finally hydrolyse to phenols. Phenols can also be obtained from diazonium salts by treating it with dilute acids.
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]]>JEE Main 2017 Online Question Paper & Answer Key 8th April,2017
For the above question paper, answer key is –
JEE Main 2017 Online Question Paper & Answer Key 9th April,2017
For the above question paper, answer key is –
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]]>JEE Main 2017 Answer Key Paper 1 (SETA)
Q1  1  Q19  1  Q37  2  Q55  4  Q73  2 
Q2  3  Q20  3  Q38  2  Q56  4  Q74  1 
Q3  3  Q21  1  Q39  2  Q57  3  Q75  1 
Q4  1  Q22  1  Q40  4  Q58  2  Q76  3 
Q5  1  Q23  2  Q41  3  Q59  3  Q77  4 
Q6  1  Q24  2  Q42  4  Q60  4  Q78  3 
Q7  4  Q25  4  Q43  3  Q61  2  Q79  2 
Q8  2  Q26  2  Q44  1  Q62  3  Q80  1 
Q9  1  Q27  4  Q45  3  Q63  4  Q81  1 
Q10  3  Q28  1  Q46  1  Q64  1  Q82  1 
Q11  4  Q29  2  Q47  2  Q65  3  Q83  1 
Q12  4  Q30  2  Q48  2  Q66  4  Q84  1 
Q13  3  Q31  1  Q49  1  Q67  3  Q85  4 
Q14  3  Q32  4  Q50  2  Q68  1  Q86  1 
Q15  4  Q33  1  Q51  1  Q69  4  Q87  4 
Q16  3  Q34  4  Q52  3  Q70  1  Q88  3 
Q17  4  Q35  2  Q53  3  Q71  4  Q89  2 
Q18  1  Q36  3  Q54  2  Q72  1  Q90  4 
JEE Main 2017 Answer Key Paper 1 (SETB)
Q1  2  Q19  1  Q37  3  Q55  4  Q73  4 
Q2  2  Q20  4  Q38  2  Q56  2  Q74  1 
Q3  4  Q21  3  Q39  3  Q57  3  Q75  2 
Q4  4  Q22  2  Q40  3  Q58  2  Q76  1 
Q5  3  Q23  2  Q41  2  Q59  3  Q77  3 
Q6  3  Q24  4  Q42  3  Q60  3  Q78  1 
Q7  3  Q25  3  Q43  4  Q61  3  Q79  3 
Q8  3  Q26  3  Q44  4  Q62  3  Q80  2 
Q9  4  Q27  1  Q45  3  Q63  2  Q81  4 
Q10  1  Q28  1  Q46  2  Q64  4  Q82  2 
Q11  2  Q29  2  Q47  3  Q65  2  Q83  4 
Q12  1  Q30  1  Q48  2  Q66  1  Q84  4 
Q13  4  Q31  1  Q49  1  Q67  3  Q85  4 
Q14  1  Q32  1  Q50  3  Q68  1  Q86  2 
Q15  3  Q33  4  Q51  1  Q69  4  Q87  3 
Q16  3  Q34  2  Q52  3  Q70  1  Q88  2 
Q17  2  Q35  1  Q53  3  Q71  4  Q89  1 
Q18  3  Q36  1  Q54  2  Q72  4  Q90  1 
JEE Main 2017 Answer Key Paper 1 (SETC)
Q1  1  Q19  3  Q37  4  Q55  4  Q73  3 
Q2  1  Q20  1  Q38  1  Q56  4  Q74  1 
Q3  4  Q21  4  Q39  3  Q57  2  Q75  1 
Q4  4  Q22  3  Q40  3  Q58  1  Q76  2 
Q5  2  Q23  4  Q41  4  Q59  1  Q77  4 
Q6  4  Q24  1  Q42  2  Q60  3  Q78  4 
Q7  2  Q25  1  Q43  4  Q61  2  Q79  4 
Q8  3  Q26  1  Q44  1  Q62  1  Q80  4 
Q9  3  Q27  1  Q45  4  Q63  3  Q81  3 
Q10  3  Q28  2  Q46  2  Q64  2  Q82  2 
Q11  2  Q29  2  Q47  3  Q65  2  Q83  4 
Q12  2  Q30  1  Q48  4  Q66  4  Q84  4 
Q13  3  Q31  4  Q49  4  Q67  1  Q85  4 
Q14  2  Q32  4  Q50  4  Q68  1  Q86  3 
Q15  2  Q33  2  Q51  2  Q69  3  Q87  2 
Q16  4  Q34  3  Q52  3  Q70  2  Q88  1 
Q17  1  Q35  3  Q53  4  Q71  3  Q89  3 
Q18  3  Q36  3  Q54  2  Q72  4  Q90  4 
JEE Main 2017 Answer Key Paper 1 (SETD)
Q1  4  Q19  3  Q37  3  Q55  2  Q73  3 
Q2  1  Q20  2  Q38  2  Q56  2  Q74  1 
Q3  4  Q21  2  Q39  1  Q57  1  Q75  1 
Q4  2  Q22  2  Q40  3  Q58  2  Q76  4 
Q5  1  Q23  1  Q41  3  Q59  2  Q77  4 
Q6  4  Q24  1  Q42  2  Q60  4  Q78  2 
Q7  3  Q25  4  Q43  4  Q61  1  Q79  2 
Q8  4  Q26  1  Q44  4  Q62  2  Q80  3 
Q9  2  Q27  1  Q45  2  Q63  3  Q81  3 
Q10  1  Q28  3  Q46  1  Q64  2  Q82  3 
Q11  1  Q29  4  Q47  1  Q65  2  Q83  4 
Q12  3  Q30  2  Q48  4  Q66  4  Q84  3 
Q13  2  Q31  3  Q49  1  Q67  4  Q85  1 
Q14  2  Q32  3  Q50  4  Q68  1  Q86  4 
Q15  2  Q33  2  Q51  1  Q69  3  Q87  3 
Q16  2  Q34  2  Q52  3  Q70  4  Q88  3 
Q17  2  Q35  2  Q53  1  Q71  1  Q89  2 
Q18  2  Q36  4  Q54  4  Q72  1  Q90  4 
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The midpoint of the chord 4x−3y=5 of the hyperbola 2x^{2}−3y^{2}=12 is ?
If the line lx+my=1 is a normal to the hyperbola, b^{2}x^{2}−a^{2}y^{2}=a^{2}b^{2}, then (a^{2}/l^{2})−(b^{2}/m^{2}) is equal to
The tangent at an extremity (in the first quadrant) of latus rectum of the hyperbola 5x^{2}−4y^{2}=20, meets xaxis and yaxis at A and B respectively. Then (OA)^{2}−(OB)^{2}, where O is the origin, equals:
The area (in square units) of the equilateral triangle formed by the tangent at (√3,0) to the hyperbola x^{2}−3y^{2}=3 with the pair of asymptotes of the hyperbola is
If the circle x^{2}+y^{2}=a^{2} intersect the hyperbola xy=c^{2 }at four points (x_{i},y_{i}),and i=1,2,3,4.
Then, y_{1}+y_{2}+y_{3}+y_{4}=?
Equation of one of the tangents passing through (2,8) to the hyperbola 5x^{2}−y^{2}=5 is
A hyperbola, having the transverse axis of length 2sinθ, is confocal with the ellipse 3x^{2}+4y^{2}=12. Then its equation is
The equation of the hyperbola which passes through the point (2,3) and has the asymptotes 4x+3y−7=0 and x−2y−1=0 is:
If x=9 is a chord of contact of the hyperbola x^{2}−y^{2}=9, then the equation of the tangent at one of the points of contact is
The distance between the foci of the hyperbola x^{2}−3y^{2}−4x−6y−11=0 is
Let the eccentricity of the hyperbola b^{2}x^{2}−a^{2}y^{2}=a^{2}b^{2} be reciprocal to that of the ellipse x^{2}+4y^{2}=4. If the hyperbola passes through a focus of the ellipse, then {MULTI CHOICE CORRECT}
For the hyperbola, x^{2}sin^{2}α−y^{2}cos^{2}α= (sin^{2}α*cos^{2}α), which of the following remains constant when α varies?
If the line ax + by + c = 0 is a normal to the hyperbola xy = 1, then
Area of triangle formed by the tangent at one vertex and asymptotes of the hyperbola xy = 2
The product of lengths of perpendiculars from any point of the hyperbola x^{2} – y^{2} = 8 to its asymptotes is
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A focus of an ellipse is at the origin. The directrix is the line x=4 and the eccentricity is 0.5. Then the length of the semimajor axis is
Equation of the circle passing through the foci of the ellipse (x^{2}/16) + (y^{2}/9)=1 and having centre at (0,3) is :
The value of k , if (1,2),(k,−1) are conjugate points with respect to the ellipse 2x^{2}+3y^{2}=6 is
If the curves b^{2}x^{2 }+ a^{2}y^{2}=a^{2}b^{2} and 16x^{2}+25y^{2}=400 cut each other orthogonally, then a^{2}−b^{2}=
The locus of a point such that the sum of its distance from the points (0,2) and (0,2) is 6,is
The length of the latus rectum of the conic 5=2r+3rcosθ+4rsinθ is :
If tangents are drawn from any point on the circle x^{2}+y^{2}=25 to the ellipse 9x^{2}+16y^{2}=144, then the angle between the tangents is
Let a and b be nonzero real numbers. Then, the equation (ax^{2}+by^{2}+c)(x^{2}–5xy+6y^{2}) = 0 represents
The minimum area of a triangle formed by any tangent to the ellipse 81x^{2}+16y^{2}=1296 and the coordinate axes is:
If the line 2x+5y=12 intersects the ellipse 4x^{2}+5y^{2}=20 in two distinct points A and B, then midpoint of AB is
The ellipse E1: 4x^{2}+9y^{2}=36 is inscribed in a rectangle R whose sides are parallel to the coordinate axes. Another ellipse E_{2} passing through the point (0,4) circumscribes the rectangle R. The eccentricity of the ellipse E_{2 }is
Statement 1 : An equation of a common tangent o the parabola y^{2}=(16√3)x and the ellipse 2x^{2}+y^{2}=4 is y=2x+2√3.
Statement 2: If the line my=m^{2}x + (4√3),(m≠0) is a common tangent o the parabola y^{2}=(16√3)x and the ellipse 2x^{2}+y^{2}=4,then m satisfies m^{4}+2m^{2}=24.
If the distance between the foci of an ellipse is 6 and the length of the minor axis is 8, then the eccentricity of the conic is ?
Tangents are drawn from the point P (3,4) to the ellipse 4x^{2}+9y^{2}=36 touching the ellipse at the points A and B.
An ellipse intersects the hyperbola 2x^{2}–2y^{2}=1 orthogonally. The eccentricity of the ellipse is reciprocal of that of the hyperbola. If the axes of the ellipse are along the coordinates axes, then
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STATEMENT1 : Alkali metals dissolve in liquid ammonia to give blue solutions. because
STATEMENT2 : Alkali metals in liquid ammonia give solvated species of the type [M(NH_{3})_{n}]^{+ }(M = alkali metals).
In context with the industrial preparation of hydrogen from water gas (CO+H_{2}), which of the following is the correct statement?
Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not formed in these reactions ?
The product (s) formed when H_{2}O_{2} reacts with disodium hydrogen phosphate is?
Observe the following statements:
the correct statements are:
Assertion (A) : K, Rb, Cs form superoxides
Reason (R) : The stability of superoxides increase from K to Cs due to decrease in lattice energy.
Which of the following statements are correct for alkali metal compounds ?
(i)Superoxides are paramagnetic in nature.
(ii)The basic strength of hydroxides increases down the group.
(iii)The conductivity of chlorides in their aqueous solutions decreases down the group.
(iv)The basic nature of carbonates in aqueous solutions is due to cationic hydrolysis.
Among the following, which is water insoluble?
Solvay process is used in the maufacture of :
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :
The compound(s) formed upon combustion of sodium metal in excess air is(are) {MULTI CHOICE CORRECT}
Reaction of Br_{2} with Na_{2}CO_{3} in aqueous solution gives sodium bromide and sodium bromate with evolution of CO_{2 }gas. The number of sodium bromide molecules involved in the balanced chemical equation is
Fluorine reacts with dilute NaOH to give gaseous product A. The bond angle in molecule A is
Very pure hydrogen (99.9%) can be made by which of the following processes?
The number of types of bonds between two carbon atoms in calcium carbide is:
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