Which one of the following is also known as lactic acid ?
Which one of the following is also known as lactic acid ?
3-hydroxy butanoic acid | |
2-Hydroxy propanoic acid | |
2-hydroxy butanoic acid | |
3-Hydroxy propanoic acid |
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۔
Pak Study Library is installing new software to improve its services. herefore, in the next few days, you may face difficulties in accessing some pages. sorry for the inconvenience.
Which one of the following is also known as lactic acid ?
3-hydroxy butanoic acid | |
2-Hydroxy propanoic acid | |
2-hydroxy butanoic acid | |
3-Hydroxy propanoic acid |
Which one of the following is a buffer solution ?
blood | |
brine | |
glue | |
solution of CuSO4 |
Which one of the following is a bridge element?
P | |
Cl | |
Be | |
K |
Which one of the following has the maximum number of isotopes ?
chlorine | |
tin | |
oxygen | |
carbon |
Which one of the following has polar covalent bond ?
N2 | |
H2 | |
HF | |
CH4 |
Which one of the following has highest volatility---------?
Ethyl alcohol | |
Water | |
Ethylene glycol | |
Diethyl ether |
Which one of the following halogens is present in Teflon--------?
F2 | |
I2 | |
Cl2 | |
Br2 |
Which one of the following gives white precipitate with aqueous solution of BaCl2?
Na2CrO4 | |
Na2CO3 | |
NaNO3 | |
NaHCO3 |
Which one of the following fertilizers provides the nitrogen and phosphorus to the plant ?
Potassium nitrate | |
Diammonium phosphate | |
Urea | |
Calcium superphosphate |
Which one of the following explain the shape of orbitals ---------?
Spin quantum number | |
Magnetic quantum number | |
Azimuthal quantum number | |
Principal of quantum number |
Which one of the following element has highest oxidation state in its compounds ?
Sn | |
Cr | |
O | |
Mn |
Which one of the following does not show hydrogen bonding?
Ethyl alcohol | |
Diethyl ether | |
Phenol | |
Water |
Which one of the following compounds usually smells like garlic ?
P2O3 | |
H3PO3 | |
All have same smell | |
P2O5 |
Which one of the following compound does not have – OH group----------?
ethyl acetate | |
ethylene glycol | |
glycerol | |
picric acid |
Which one of the following carbonate is water insoluble ?
CaCO3 | |
K2CO3 | |
(NH4)2CO3 | |
Na2CO3 |
Which one of the following aqueous solutions will be basic ?
FeCl3 | |
Na2CO3 | |
NaCI | |
Na2SO4 |
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
Lithium | |
Potassium | |
Rubidium | |
Sodium |
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
dihydric alcohol | |
primary alcohol | |
tertiary alcohol | |
secondary alcohol |
Which one of the following alcohol has greater boiling point----------?
ethanol | |
ethylene glaycol | |
methanol | |
glycerol |
Which one of the following acids is present in lemon juice ?
Oxalic acid | |
Benzoic acid | |
Citric acid | |
Tartaric acid |
Which one of following is not a property of pure quartz ?
Hard | |
Coloured solid | |
Brittle | |
All of above |
Which one of following amino acid is neither acidic nor a basic in nature ?
Glutamic acid | |
Proline | |
Histidine | |
Lysine |
Which one is true about isotope ?
Same chemical properties | |
Same physical properties | |
Same number of neutrons | |
Same mass number |
Which one is the right value for R ?
0.0821 atm dm3k-1mol- | |
2 cal k-1 mol-1 | |
0.0821 atm m3k-1mol-1 | |
8.314 Nm2k-1mol-1 |
Which one is not true about cathode rays ?
Cannot ionize | |
9.11×10-31 Kg | |
Heat up the platinum foil | |
Cast shadow |