The pair in which both the species have the same magnetic moment (spin only) is:
1) [Co(OH)4]2– and [Fe(NH3)6]2+ 2) [Mn(H2O)6]2+ and [Cr(H2O)]2+ 3) [Cr(H2O)6]2+ and [CoCl4]2– 4) [Cr(H2O)6]2+ and [Fe(H2O)6]2+ Answer: (4) Both have... View Article
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For the equilibrium A ⇌ B the variation of the rate of the forward (a) and reverse (b) reaction with time is given by
For the equilibrium A ⇌ B the variation of the rate of the forward (a) and reverse (b) reaction with... View Article
[P] on treatment with Br2 / FeBr3 in CCl4 produced a single isomer
[P] on treatment with Br2 / FeBr3 in CCl4 produced a single isomer C8H7O2Br while heating [P] with soda lime... View Article
For one mole of an ideal gas, which of these statements must be true
(a) U and H each depends only on temperature (b) Compressibility factor z is not equal to 1 (c) CP,m... View Article
Among the statements (a)-(d), the correct ones are:
(a) Limestone is decomposed to CaO during the extraction of iron from its oxides. (b) In the extraction of silver,... View Article
An organic compound (A)
An organic compound (A) (molecular formula C6H12O2) was hydrolysed with dilute H2SO4 to give a carboxylic acid (B) and alcohol... View Article
Match the following
Match the following: (i) Foam (a) smoke (ii) Gel (b) cell fluid (iii) Aerosol (c) jellies (iv) Emulsion (d) rubber... View Article
What are the functional groups present in the structure of maltose?
1) One acetal and one hemiacetal 2) One acetal and one ketal 3) One ketal and one hemiketal 4) Two... View Article
Identify the incorrect statement from the options below for the given cell:
1) If Eext = 1.1 V, no flow of e– or current occurs 2) If Eext > 1.1 V, Zn... View Article
AWS Full Form
What Is The Full Form Of AWS? The full form of AWS is Amazon Web Services. AWS is a comprehensive... View Article
The region in the electromagnetic spectrum where the Balmer series lines appear is:
1) Microwave 2) Infrared 3) Ultraviolet 4) Visible Answer: (4) The question should be a bonus as lines of the... View Article
When neopentyl alcohol is heated with an acid
When neopentyl alcohol is heated with an acid, it is slowly converted into an 85:15 mixture of alkenes A and... View Article
The ionic radii of O2–, F–, Na+ and Mg2+ are in the order:
1) F– > O2– > Na+ > Mg2+ 2) Mg2+ > Na+ > F– > O2– 3) O2– > F–... View Article
On heating, lead(II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to a blue solid (C). The oxidation number of nitrogen in solid (C) is:
1) +3 2) +4 3) +2 4) +5 Answer: (1) Pb(NO3)2 → PbO + NO2 + O2 (A) Brown gas... View Article
The IUPAC name of the following compound is:
The IUPAC name of the following compound is: 1) 3-Bromo-5-methyl cyclopentane carboxylic acid 2) 4-Bromo-2-methyl cyclopentane carboxylic acid 3) 5-Bromo-3-methyl... View Article
For real numbers alpha, beta, gamma and delta the value of 10 (α + βγ + δ) is equal to
For real numbers α, β, γ and δ, if \(\begin{array}{l}\int \frac{(x^{2}-1)+tan^{-1}(\frac{x^{2}+1}{x})}{(x^{4}+3x^{2}+1)tan^{-1}(\frac{x^{2}+1}{x})}dx = \alpha log_{e}(tan^{-1}(\frac{x^{2}+1}{x}))+\beta tan^{-1}[\gamma (\frac{x^{2}+1}{x})]+\delta tan^{-1}(\frac{x^{2}+1}{x})\end{array} \) where C... View Article
Let [latex]A=\begin{bmatrix} a_{1}\\ a_{2} \end{bmatrix}[/latex] and [latex]B=\begin{bmatrix} b_{1}\\ b_{2} \end{bmatrix}[/latex] be two 2 × 1 matrices with real entries such that A = XB, where X =[latex]\frac{1}{\sqrt3}\begin{bmatrix} 1 &-1 \\ 1&k \end{bmatrix}[/latex], and k ∈ R. If (a12 + a22) = (2 / 3) (b12 + b22) and (k2 + 1) b22 ≠ – 2b1b2, then the value of k is
Answer: (1) XB = A (1 / √3) \(\begin{array}{l}\begin{bmatrix} b_{1}-b_{2}\\ b_{1}+kb_{2} \end{bmatrix}=\begin{bmatrix} a_{1}\\ a_{2} \end{bmatrix}\end{array} \) b1 – b2 =... View Article
Let 1 / 16, a and b be in G.P. and 1/a, 1/b, 6 be in A.P., where a, b, > 0. Then 72 (a + b) is equal to
Answer: (14) a2 = b / 16 and 2 / b = (1 / a) + 6 Solving, we get... View Article
If the distance of the point (1, – 2, 3) from the plane x + 2y – 3z + 10 = 0 measured parallel to the line, [x – 1] / 3 = [2 – y] / m = [z + 3] / 1 is √7 / 2, then the value of |m| is equal to
Answer: (2) [x – 1] / 3 = [y + 2] / – m = [z – 3] / 1... View Article
Let f : R → R and g : R → R be defined as f (x) = [latex]left{begin{matrix} x+a, &x<0 \ |x-1|, &xgeq 0 end{matrix}right.[/latex] and g (x) = [latex]left{begin{matrix} x+1, &x<0 \ (x-1)^2+b, &xgeq 0 end{matrix}right.[/latex] where a, b are non-negative real numbers. If (gof) (x) is continuous for all x ∈ R, then a + b is equal to
Given (gof) (x) is continuous for all x ∈ R Answer: (1) Given g(f(x)) is continuous. So, at x =... View Article
