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