Which of the following is the formula of chrome red ?
Which of the following is the formula of chrome red ?
2Pb CO3 – Pb (OH)2 | |
Pb3 O4 | |
Pb Cr O4 – Pb (OH)2 | |
Pb2O |
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 the formula of chrome red ?
2Pb CO3 – Pb (OH)2 | |
Pb3 O4 | |
Pb Cr O4 – Pb (OH)2 | |
Pb2O |
Which of the following is the best explanation that CO2 is non polar molecule ---------?
None | |
Dipole moment is zero | |
Sp hybridization | |
Linear geometry |
Which of the following is soluble in water?
AgCl | |
AgI | |
AgF | |
AgBr |
Which of the following is solid?
Water | |
Stone | |
Both | |
None |
Which of the following is pseudo solid-----------?
CaF2 | |
NaCl | |
Glass | |
Diamond |
Which of the following is not use of compounds of Fluorine--------?
SbF3 is used for manufacture of pottery | |
Sodium fluoroacetate is a rat poison | |
Cu F2 is used in ceramic industry | |
None of the above |
Which of the following is not the name of any scientist?
Pauli exclusion principle | |
Le-Chatelier’s principle | |
Hund’s rule | |
Aufbau’s principle |
Which of the following is not primary pollutant---------?
SO3 | |
NO | |
CO | |
H2SO4 |
Which of the following is not considered as an intermolecular force between molecules ?
Coordinate covalent bonds | |
Debye forces | |
Hydrogen bonds | |
London dispersion forces |
Which of the following is not characteristics of reversible reaction---------?
chemical equilibrium is established | |
whole amount of reactant does not change into product | |
a catalyst changes the direction of reaction | |
rate of forward reaction decreases as reaction proceeds |
Which of the following is not an ester---------?
isobutyle formate | |
octyl acetate | |
amyl acetate | |
sodium butyrate |
Which of the following is not an amino acids-----------?
glumatic acid | |
aspartic acids | |
lactic acid | |
glycine |
Which of the following is not a use of silicon ?
Antifreeze | |
Lubricants | |
Hydraulic brakes | |
Water repellent |
Which of the following is not a use of formaldehyde ?
in making acetic acid | |
in making medicine urotropine | |
in making throat lozenges | |
in silvery mirror |
Which of the following is not a use of acetaldehyde ?
formation of mirror | |
formation of throat lozenges | |
antiseptic inhalant | |
formation of phenolic resins |
Which of the following is not a secondary pollutant---------?
carbonic acid | |
carbon dioxide | |
sulphuric acid | |
ozone |
Which of the following is not a macromolecule ?
sand | |
haemoglobin | |
maltose | |
diamond |
Which of the following is not a heavy industry ?
paper | |
none | |
iron | |
fertilizer |
Which of the following is not a fatty acid ?
Acetic acid | |
Phthalic acid | |
Butanoic acid | |
Propanoic acid |
Which of the following is not a condition for the formation of smog ?
sunlight | |
less movement of air | |
sufficient NO | |
winds |
Which of the following is most soluble on water?
SrSO4 | |
CaSO4 | |
BaSO4 | |
MgSO4 |
Which of the following is mineral fiber ?
Teflon | |
acrylic | |
saran | |
asbestos |
Which of the following is metasilicic acid ?
H2SiO3 | |
H2SnO3 | |
H3AsO4 | |
H3SbO4 |
Which of the following is macronutrient ?
Zn | |
H | |
Cu | |
Cl |
Which of the following is incorrect statement about nitrogen importance ?
it accelerates fruits and flowers growth | |
It is involved in the synthesis of protein and nucleic acids | |
It is involved in the chlorophyll synthesis | |
It enhances plant growth |