Which of the following will decompose to produce litharge---------?
Which of the following will decompose to produce litharge---------?
All of the above | |
PbO2 | |
Pb2O | |
Pb3O4 |
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 will decompose to produce litharge---------?
All of the above | |
PbO2 | |
Pb2O | |
Pb3O4 |
Which of the following will be acidic-------?
all of the above | |
propyne | |
1-butyne | |
ethyne |
Which of the following way in used for classification of chromatography ?
Phase | |
Shape | |
Mechanism | |
All |
Which of the following unit of concentration is independent of temperature ?
Mole fraction | |
Molality | |
all | |
Molarity |
Which of the following type of reaction is 3rd order reaction---------?
2N2O5 = 2N2O4 + O3 | |
None of these | |
2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2 | |
NO + O3 ? NO2 + O2 |
Which of the following theories is superior to others---------?
VSEPR | |
VBT | |
none of the above | |
MOT |
Which of the following terms is used for the mass of chlorine 35.5 ?
relative isotopic mass | |
atomic weight | |
mass number | |
relative atomic mass |
Which of the following terms is not used for ionic compound ?
formula unit | |
molecular formula | |
empirical formula | |
formula mass |
Which of the following technique is used for the separation of insoluble particles from liquids ?
Crystallization | |
Chromatography | |
Solvent extraction | |
Filtration |
Which of the following technique is simple and efficient to purify a substance----------?
Sublimation | |
Crystallization | |
Filtration | |
Solvent extraction |
Which of the following sulphates is not soluble in water ?
Potassium sulphate | |
Zinc sulphate | |
Sodium sulphate | |
Barium sulphate |
Which of the following substances does not give iodoform test ?
methyl alcohol | |
acetaldehyde | |
acetone | |
ethyl alcohol |
Which of the following substance do not show continuous solubility curve ?
KCIO4 | |
Na2SO4. 10H2O | |
PbCl2 | |
K2Cr2O7 |
Which of the following statements is wrong about isotopes ?
they possess different mass number | |
they possess same chemical properties | |
they possess different position in the periodic table | |
they possess different physical properties |
Which of the following statements is true about plasma--------?
All of the above | |
It may be the first state of matter | |
It is a conductor of electricity | |
It is not a phase transition |
Which of the following statements is incorrect about halogens ?
All are non-metals | |
All the halogens react with noble gases to form their halides | |
All the halogens have electronic conviguration ns2p5 | |
They have high electron attinity and ionization energy |
Which of the following statements is incorrect about fluorine--------?
fluorine follows octet rule and as well as extended octet rule | |
fluorine is restricted to -1 oxidation state | |
fluorine has lowest dissociation energy among the halogens | |
both B and C |
Which of the following statements is false about transition metals?
They show variable valency | |
They form complexes | |
All transition metal compounds are paramagnetic | |
They form coloured ions |
Which of the following statements about isotopes is correct ?
Isotopes with odd atomic number and even mass number are abundant | |
Isotopes with odd atomic number are abundant | |
Isotopes with even atomic number and odd mass no are abundant | |
Isotopes with even atomic number and even mass number are abundant |
Which of the following solvents would best facilitate an SN2 substitution reaction?
Ethanol | |
Dimethylflormamide | |
Hexane | |
Water |
Which of the following solutions of H2SO4 is more concentrated ?
all have same concentration | |
1 Molar solution | |
1 molal solution | |
1 normal solution |
Which of the following solution has the highest boiling point ?
18.0 % glucose solution | |
6.0 % urea solution | |
5.85% NaCl Solution | |
All have same boiling point |
Which of the following solids show anisotropy----------?
Plastic | |
Rubber | |
Glass | |
None of the above |
Which of the following shows inert pair effect ?
silicon | |
boron | |
tin | |
carbon |
Which of the following shows electrical conduction---?
Diamond | |
Sodium | |
Graphite | |
Potassium |