What is the order of kinetics in the SN1 mechanism ?
What is the order of kinetics in the SN1 mechanism ?
First | |
Zero | |
Second | |
Third |
پاک اسٹڈی لائبریری اپنی خدمات کو بہتر کرنے کے لئے نئے سوفٹ وئیر انسٹال کررہی ہے ۔ اس لئے آئندہ کچھ دن آپ کو کچھ صفحات تک رسائی میں مشکلات کا سامنا ہوسکتا ہے ۔ جس کے لئے ہم معذرت خواہ ہیں۔
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What is the order of kinetics in the SN1 mechanism ?
First | |
Zero | |
Second | |
Third |
What is the molecular Weight of Nitric acid (HNO3 ) ?
70.012 g/mol | |
81.011 g/mol | |
65.012 g/mol | |
63.012 g/mol |
What is the molecular weight of Ammonia (NH3) ---- ?
19.031 g/mol | |
27.033 g/mol | |
18.031 g/mol | |
17.031 g/mol |
What is the molecular formula of Benzenetriozonide ?
C6H5O8 | |
C6H5O9 | |
C6H6O6 | |
C6H6O9 |
What is the molecular formula for Nitric acid ---- ?
H2NO4 | |
HNO2 | |
HN2O2 | |
HNO3 |
What is the mass percent of silver in silver notrate, AgNO3?
63.50% | |
61.50% | |
65.60% | |
64.50% |
What is the mass of one mole of Iodine?
254g | |
74g | |
127g | |
53g |
What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm?
1.67 g/L | |
1.68 g/L | |
None of the above | |
1.65 g/L |
What is the Chemical formula of Zinc Hydroxide ----- ?
ZNO2 | |
ZnOH | |
Zn2(OH)3 | |
Zn(OH)2 |
What is the abundant form of matter on earth ?
Liquid | |
Solid | |
Gas | |
Plasma |
What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ?
2 | |
6 | |
3 | |
4 |
What is clinker ?
roasted calcareous material | |
roasted gypsum | |
roasted calcareous and argillaceous material | |
roasted argillaceous material |
What is chemical symbol for Tungsten?
T | |
Tn | |
Z | |
W |
What do we call to sudden expansion of plasma ?
Grahams law of diffusion | |
Joule Thompson effect | |
Daltons law of partial pressure | |
Avogadros law |
What catalyst is employed when benzene is prepared from acetylene at 70°C?
Ni 250 – 300°C | |
Cr2O3 + A2O3 + SiO2 | |
Organo-nickel | |
Raney nickel |
What are the metal bearing rocks called?
Bauxite | |
Ores | |
Bitumen | |
Metalloids |
Wavelength of electron was verified by---------?
Einstein | |
Davisson and Germer | |
Roentgen | |
Moseley |
Water of crystallization can be removed by--------?
drying | |
All of the above | |
heating | |
evaporation |
Water molecule is----?
V-shaped | |
Pyramidal | |
Triangular planer | |
Angular |
Water has maximum density at ---------?
0°C | |
4°C | |
100°C | |
2°C |
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce--------?
methanal | |
methane | |
methanol | |
carbonic acid |
Water absorber used in combustion analysis is----------?
CaCl2 | |
Mg (CIO4)2 | |
Lime water | |
50% KOH |
Voltaic cell is a---------?
irreversible cell | |
reversible cell | |
all of the above | |
alkaline cell |
Voltaic cell can be recharged by-------?
by removal of solution | |
by heating it | |
by addition of fresh solution | |
by replacing external circuit with external source of electricity |
Vinylacetylene combines with HCI to form----------?
divinyl acetylene | |
chloroprene | |
benzene | |
polyacetylene |