The equation of the plane passing through the point (1,2,–3) and perpendicular to the planes 3x + y – 2z = 5 and 2x – 5y – z = 7, is:
a. 3x – 10y – 2z + 11 = 0 b. 6x – 5y – 2z – 2 = 0... View Article
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The locus of the mid-point of the line segment joining the focus of the parabola y2 = 4ax to a moving point of the parabola, is another parabola whose directrix is:
a. x = a b. x = 0 c. x = -a/2 d. x = a/2 Answer: (b) h =... View Article
The photoelectric current from Na (Work function, w0 = 2.3 eV) is stopped by the output voltage of the cell
The photoelectric current from Na (Work function, w0 = 2.3 eV) is stopped by the output voltage of the cell... View Article
The total number of monohalogenated organic products
The total number of monohalogenated organic products in the following (including stereoisomers) reaction is ______. Solution: 8
An element with molar mass 2.7 10-2 kg mol-1 forms a cubic unit cell with edge length 405 pm. If its density is 2.7 103 kg m-3, the radius of the element is approximately ______ 10-12 m (to the nearest integer).
Solution: Density = [Z * GMM] / [NA * a3] 2.7 × 103 = [Z * 2.7 * 10-2] /... View Article
The volume strength of 8.9 M H2O2 solution calculated at 273 K and 1 atm is ______. (R = 0.0821 L atm K-1 mol-1) (rounded off to the nearest integer)
Volume strength = [8.9 / 2] * [0.821 * 273] / 1 = 99.73 = 100 Solution: 100
The mole fraction of glucose (C6H12O6) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is
Solution: 47 % xGlucose = 0.1 mass% of glucose = {[0.1* 180] / [0.1 * 180 + 0.9 * 18]}... View Article
In a molecule of pyrophosphoric acid, the number of P-OH, P = O and P – O – P bonds / moiety(ies) respectively are:
1) 3, 3 and 3 2) 4, 2 and 1 3) 2, 4 and 1 4) 4, 2 and 0... View Article
Let CNaCl and CBaSO4 be the conductances
Question 19: Let CNaCl and CBaSO4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO4,... View Article
Tyndall effect is observed when
1) The diameter of dispersed particles is much smaller than the wavelength of light used. 2) The diameter of dispersed... View Article
The mechanism of SN1 reaction is
The mechanism of SN1 reaction is given as: A student writes general characteristics based on the given mechanism as: (a)... View Article
An organic compound [A], molecular formula
An organic compound [A], molecular formula C10H20O2 was hydrolyzed with dilute sulphuric acid to give a carboxylic acid [B] and... View Article
The atomic number of the element unnilennium is
Option are 1) 109 2) 102 3) 119 4) 108 Solution: (1) Unnilennium 109
The electronic spectrum of [Ti(H2O)6]3+ shows a single broad peak with a maximum at 20,300 cm-1. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol-1, is:
(1 kJ mol-1 = 83.7 cm-1) 1) 83.7 2) 242.5 3) 145.5 4) 97 Solution: (4) [Ti(H2O)6]3+ Ti3+ 3d1 in... View Article
Henry’s constant (in kbar) for four gases
Henry’s constant (in kbar) for four gases ɑ, β, , and in water at 298 K is given below: ɑ... View Article
Thermal power plants can lead to
1) Ozone layer depletion 2) Blue baby syndrome 3) Eutrophication 4) Acid rain Solution: (4) Refer environmental chemistry It emits... View Article
Glycerol is separated in soap industries by:
1) Fractional distillation 2) Distillation under reduced pressure 3) Differential extraction 4) Steam distillation Solution: (2) conceptual Glycerol is separated... View Article
Of the species, NO, NO+, NO2+ and NO–, the one with minimum bond strength is:
1) NO– 2) NO+ 3) NO2+ 4) NO Solution: (1) B.O. NO– = 2 BO NO+ = 3 BO NO2+... View Article
Which of the following compounds produces an optically inactive compound on
Which of the following compounds produces an optically inactive compound on hydrogenation? Solution: (3)
The antifertility drug “Novestrol” can react with:
1) Br2 / water; ZnCl2 / HCl; FeCl3 2) Br2 / water; ZnCl2 / HCl; NaOCl 3) Alcoholic HCN; NaOCl;... View Article
