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