The viscosity of solids is--------?
The viscosity of solids is--------?
No concept of viscosity in solid | |
Negligible | |
Infinite | |
Medium |
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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The viscosity of solids is--------?
No concept of viscosity in solid | |
Negligible | |
Infinite | |
Medium |
The velocity of the photon----------?
Is independent of wavelength | |
Depends upon its frequency | |
Depends upon source | |
Equals to the square of amplitude |
The value of e/m ratio of electron is--------?
6.02 x 1023 C/kg | |
1.7588 x 1020 C/kg | |
1.7588 x 1011 C/kg | |
9.1095 x 10-31 C/kg |
The value of activation energy is primarily determined by--------?
Temperature | |
Concentration of reactants | |
Chemical nature of reactants and products | |
Effective collision |
The valency of carbon Atom is ----- ?
3 | |
2 | |
4 | |
1 |
The use of CaCl2 and PCl5 in the process of crystallization is as a----------?
reducing agent | |
colouring agent | |
drying agent | |
oxidizing agent |
The use of antifreeze in the automobile radiator is an important application of---------?
intrinsic property | |
colligative property | |
additive property | |
constitutive property |
The unit of the rate constant (k) is same as that of rate of reaction--------?
Third order reaction | |
Zero order reaction | |
Second order reaction | |
First order reaction |
The unit of molality is---------?
gram dm-3 | |
moles kg-1 | |
moles dm-3 | |
none |
The type of hybridisation of boron in diborane is---?
Sp- hybridisation | |
Sp2- hybridisation | |
Sp3- hybridisation | |
Sp3d2- hybridisation |
The type of filtering media used for filtration depending upon----------?
Nature of reactants | |
Nature of crucible | |
Nature of product | |
Nature of precipitate |
The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called--------?
Ion dipole-dipole forces | |
Dipole-dipole forces | |
London dispersion forces | |
Debye forces |
The tip of funnel should touch the wall of the breaker in order to avoid----------?
all of above | |
Inconsistent flow of filtration | |
splashing | |
premature crystallization |
The test which is used for the identification of amino-acids is---------?
Ninhydrin test | |
Benedict test | |
Biuretic test | |
Molisch test |
The term internal salt refers to-----------?
Acidic character of amino acids | |
Non-polar structure of amino acids | |
Dipolar character of amino acids | |
Basic character of amino acids |
The technique used to separate components of mixture in solid phase ?
Crystallization | |
Filtration | |
Sublimation | |
Solvent extraction |
The systematic name of sucrose is----?
1-β- D- glucofuranosyl-2-α- D- fructofuranoside | |
11-α-D-glucopyranosyl-2-β-D-fructofuranoside | |
1-α-D- glucofuranosyl-2-α-D- fructopyranoside | |
1-α-D- glucopyranosyl-2-β-D-fructopyranoside |
The substances that reduces the effectiveness of a catalyst are called ----------?
Promoters | |
Inhibitors | |
Poisoning catalysts | |
pro-catalysts |
The substance used in cancer therapy is------?
Rn | |
Fe | |
Ni | |
Co |
The structure of H2O2 is----?
Spherical | |
Non- polar | |
Linear | |
Planar |
The strength of solution of an element whose electrode potential is to be measured is--------?
2M | |
1N | |
1m | |
1M |
The stationary and mobile phases in paper chromatography are------?
Liquid/solid | |
Solid/liquid | |
Liquid/liquid | |
Liquid/gas |
The spreading of fragrance or scent in air is due to--------?
Low dsensity | |
Attraction with air | |
Diffusion | |
Effusion |
The specific rate constant of a first order reaction depends on the--------?
Concentration of the reactant | |
Temperature | |
Concentration of the product | |
Time |
The species which donate two electron pairs in a coordination compound is called---------?
mono-dentate ligand | |
poly-dentate ligand | |
ligand | |
bi-dentate ligand |