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