Which of the following is different with respect to physical appearance ?
Which of the following is different with respect to physical appearance ?
Arsenic | |
Antimony | |
Phosphorus | |
Bismuth |
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 of the following is different with respect to physical appearance ?
Arsenic | |
Antimony | |
Phosphorus | |
Bismuth |
Which of the following is an unsaturated carboxylic acid----------?
succinic acid | |
malonic acid | |
maleic acid | |
oxalic acid |
Which of the following is an example of liquid in gas solution?
Fog | |
Opals | |
Paints | |
Dust particles in smoke |
Which of the following is a symmetrical ketone----------?
3 – hexanone | |
butanone | |
2-pentanone | |
acetone |
Which of the following is a macro nutrient ?
carbon | |
boron | |
iron | |
copper |
Which of the following ion is stable in aqueous solution ?
H- | |
All are stable | |
H+ | |
Cl- |
Which of the following ion formation is always exothermic ?
Uni-positive | |
Di-positive | |
Di-negative | |
Uni-negative |
Which of the following have their outer most shell complete in atomic form ?
Alkali metals | |
Gun metals | |
Noble gases | |
Coinage metals |
Which of the following has orange flavour---------?
octyl acetate | |
isobutyl formate | |
amyl lactate | |
ethyl butyrate |
Which of the following haloalkane is hydrolysed by SN1 mechanism?
CH3CH2CH2Br | |
CH3Br | |
(CH3)3CBr | |
CH3CH2Br |
Which of the following gases shows more ideal behaviour at 0°C------?
NH3 | |
H2 | |
CH4 | |
He |
Which of the following gases is the main cause of acid rain ?
NO2 | |
none of the above | |
both a & b | |
CO |
Which of the following fertilizers is not useful for paddy rice ?
urea | |
DAP | |
Ammonium sulphate | |
Ammonium nitrate |
Which of the following factors help to measure quallity of water ?
DO | |
all of the above | |
COD | |
BOD |
Which of the following elements react with steam to produce H2 gas?
Ni | |
Pd | |
Sn | |
All of the above |
Which of the following elements has greater 1st ionization energy---------?
C | |
N | |
B | |
O |
Which of the following elements conduct electricity and also melts below 100°C ?
Carbon | |
Sulphur | |
Aluminium | |
Sodium |
Which of the following element has the maximum electron affinity---?
F | |
I | |
Cl | |
Br |
Which of the following element doesnot show allotropy---------?
Arsenic | |
Carbon | |
Nitrogen | |
Sulphur |
Which of the following element act as inert electrode--------?
Ag | |
Pt | |
None | |
CCu |
Which of the following effects best explains that o-nitrophenol is insoluble in water?
Intermolecular H-bonding | |
Inductive effect | |
Isomeric effect | |
Resonance effect |
Which of the following does not give Borax bead test ?
A1 | |
Ni | |
Cu | |
Cr |
Which of the following does not contain phosphorus ?
Nerves | |
Yolk of egg | |
Bone | |
Steel |
Which of the following do not give aldol condensation reactions ?
propionaldehyde | |
diemthyl ketone | |
acetaldehyde | |
formaldehyde |
Which of the following compounds will react with Tollens reagent ?
CH3-CH-CH3 | |
CH3-CHO | |
CH3-COOH | |
CH3-CO-CH2-CH3 |