Butyl chloride gives possible isomers ?
Butyl chloride gives possible isomers ?
2 | |
3 | |
4 | |
5 |
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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Butyl chloride gives possible isomers ?
2 | |
3 | |
4 | |
5 |
Bucky balls is an allotropic from of---------?
Sulphur | |
Silica | |
Carbon | |
Tin |
Bromine can be liberated from KBr solution by the action of --------?
Iodine solution | |
Ki | |
Chlorine | |
NaCl |
Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is----------?
Analytical chemistry | |
Physical chemistry | |
Quantum chemistry | |
Stoichio chemistry |
Boron is non-netal whereas A1 is metal. It is due to------------?
High nuclear charge | |
Small size | |
No authorized justification yet | |
Both A and B |
Boron is non metal while other elements of IIIA group are metals. This is because-------?
it has small size | |
it forms molecular addition compounds | |
it has high nuclear charge | |
all of the above |
Boron in soil has been considered micronutrient for---------?
Alkalinity of soil | |
All | |
Soil porocity | |
Proper growth of plants |
Boric acid cannot be used---------?
For enamel and glazes | |
For washing eyes | |
In soda bottles | |
As antiseptic in medicine |
Borax is a white crystalline solid and it is---------?
Soluble only in organic solvents | |
Insoluble in water | |
More soluble in hot water | |
More soluble in cold water |
Bond will beionic when E.N difference of bonded atom is ----------?
No specificity exists | |
Equal to 1.7 | |
Greater than 1.7 | |
Less than 1.7 |
Bond order for N2 molecule is ---------?
1 | |
3 | |
4 | |
2 |
Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to---------?
More strength of H-bonding | |
More strength of London forces | |
All of the above | |
Less polarizability |
Boiling point elevations can be measured by---------?
none of the above | |
Beckmanns method | |
Landsbergers method | |
Linds method |
Bohrs model is contradicted by---------?
Heisenbergs uncertainty principle | |
All of these | |
Dual nature of matter | |
Plancks theory |
Bleaching powder is not used for bleaching--------?
Cotton | |
Linen | |
Paper pulb | |
Costly fabrics |
Bleaching powder is an example of--------?
Complex | |
Double salt | |
Mixed salt | |
Normal salt |
Biocatalytical proteins are---------?
any of above | |
Lipids | |
Substrate | |
Enzymes |
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to--------?
Similar outer most shell electronic configuration | |
Both form ionic compounds | |
All | |
Both are electropositive |
Benzene is heated in air with V2O5 at 450°C it undergoes--------?
Substitution reaction | |
Oxidation reaction | |
Elimination reaction | |
Addition reaction |
Benzene is a good solvent for---------?
iodine | |
resins | |
fats | |
all the above |
Benzene gives mainly-----?
Halogenation | |
Addition reaction | |
Substitution reactions | |
All of these |
Benzene does not undergo----------?
Oxidation reactions | |
Addition reaction | |
Polymerization reactions | |
Substitution reaction |
Beillstein test is used for----?
N2 | |
CO2 | |
CO | |
Cl |
BeCl2 has the hybrid orbitaks of type----?
2 | |
dsp2 | |
Sp | |
3 |
Beckmanns apparatus is used to measure--------?
lowering of osmotic pressure | |
lowering of vapour pressure | |
boiling point elevation | |
depression in freezing point |