2019(Click here for video lecture)
(i) The number has five significant figures:
*391.10 *300002 30000 *10300
(ii) At S.T.P. the volume of 3.01x10^23 molecules of H2 gas is
* 22.5dm3 *22.4dm3 *11.2dm3 *2.24dm3
(iii) An Ideal gas obeys gas laws at:
* high temperature * all temperatures & pressure * high pressure * low temperature
(iv) The process of direct conversion of solid into vapour is called:
*Condensation *Sublimation
*Evaporation *Neutralization
(v) Capillary action of liquids is due to:
*Viscosity *Surface tension *Density *Fluidity
(vi) (n+) value for 5d orbital is:
*4 *5 *6 *7
(vii) The colour has the shortest wavelength in the visible spectrum of light:
*Red *Violet * Green *yellow
viii) This series of lines is produced when the electron jumps from the 4th orbit to the 2nd orbit:
*Lyman *Balmer * Brackett *Paschen
(ix) The maxdimum number of electron can be accommodated in f orbital is:
*7 *10 *14 *16
(x) This Hydrogen halide has the highest percentage of ionic character:
*HF * HCI *HBr * HI
(xi) The molecule has zero dipole moment:
* NH3 * CO2 *HCl *H2O
(xii) 1 Debye is equal to:
*2.25 x 10^-13Cm3. *3.4x 10^-40 Cm3 *3.335x 10^-23 Cm3 *3.335x 10^-30 Cm3
(xiii) One joule is equal to:
*0.239 cal *0.391 cal *0.398 cal *4.14J
(xiv) In the following reaction, Kp > KC
H2 + I2 === 2HI * 2S02+ 02 === 2SO3 PCI5 == PCl3 + Cl2 2NO2 ==== N2O4
xv)Universal indicator in acid given:
*Green colour *Pink colour *Yellow colour *Red colour
xvi)The oxidation number of Mn in K2 MnO4 IS:
*+2 *+4 *+6 *+7
(xvii) A powdered solid is more reactive than its chunks due to its:
*Higher temperature *Greater surface area * Greater volume * Higher pressure
2018(Click here for video lecture)
1. This is not an extensive property:
*Internal energy *Enthalpy *Density *Entropy
2. The equation for Ksp of CaF2 is:
* Ksp =[Ca++][F2] *Ksp =[Ca+2][F]2 *Ksp =[Ca++][F] *Ksp =[Ca][F]
3. This ion has the greatest degree of hydration:
* Na+ *Mg+2 *Al+3 *K+
4. The molarity of a solution containing 53g Na2CO3 dissolved in 1 dm3 solution will be:
0.1 * 0.01 * 0.02 *0.5
5. The reaction 2NO2 -----2NO + O2, is of:
*Zero order *1 order *2 order *3 order
6. The volume of 3.01 x 1023 molecules of N2 gas at S.T.P will be:
*3 dm3 *11.2 dm3 *22.4 dm3 *28 dm3
7.The characteristic of 10^3 is:
*3 * 2 *4 *5
8. If a = b/=c and a=b =y = 90°, the crystal structure is:
*Cubic *Tetragonal *Orthorhombic *Triclinic
9. The rate of diffusion of CO2 is equal to that of
*CH4 * CO *C2H8 *SO2
10. The S.I. unit of viscosity is:
*Poise *Millipoise *Centipoise *N.s.m-2
11.The maximum number of electrons in a particular energy level is:
*2n *n^2 *(2l+1) *2(2l+1)
12. The energy of each quantum of radiation is directly proportional to its:
*Frequency *Wave number * Source of energy *wavelength
13. These radioactive rays are non-material in nature:
*a rays *Brays *y rays *Canal rays
14. The potential energy of an electron can be denoted by:
*Ze2/r2 *Ze/r *Ze2/r *-Ze2/r
15. This molecule has the maximum bond angle
*CS2 *NH3 *SO2 *H20
16.he energy of this bond is the greatest:
* CH4 * O2 * N2 *Cl2
17. The dipole moment of this molecule is zero
*NH3 *CO2 *N2O *HCl
2017(Click here for video lecture)
1. In the diagram below, the name of the reverse process of B is:
*Sublimation *Condensation *Evaporation *Fusion
2. If a = b/=c and a=b =y = 90°, the crystal structure is:
*Cubic *Tetragonal *Orthorhombic *Triclinic
3. The uncertainity principle is applied to:
* aeroplane *cricket ball *electron *earth
4. This is an intensive property:
*Internal energy *Enthalpy *volume *Refractive Index
5. Quantum number values for 3d orbital are:
*n=3, l=2 *n=3, l=3 *n=2, l=2 *n=3, l=0
6. This molecule has the maximum bond angle:
* NH3 *CO2 *SO2 *H2O
7. For a reversible reaction, if the concentrations of the reactants are doubled, then the equilibrium constant will:
* also be doubled *be halved *remain the same *become one-fourth
8.The molarity of solution containing 4gm NaOH dissolved in 10 ml solution is:
*0.4M *0.1M *10M *1.0M
9. A powdered solid is more reactive than its chunks due to its:
*Higher temperature *Greater surface area * Greater volume * Higher pressure
10. The number of bonds in C2H2 molecules is:
* One sigma and two pi * Three sigma and one pi * Three sigma and two pi * Two sigma and two pi
11. Most of the radiations coming out from pitchblende were:
* Protons *Electrons *Positrons *Neutrons
12. The number of orbitals in each energy level is given by the formula:
*2n^2 *(2l+1) *2(2l+1) *n^2
13. The energy of each quantum of radiation is directly proportional to its:
*Wavelength *Frequency *wave number *source of energy
14.This has five significant figures:
* 0.00215 * 21500 *21.5210 *21.521
15. The melting point of those substances which expand on melting, increases when the pressure is:
*decreased *increased *kept constant *atmospheric
16.While considering the rules of significant figures the simplified result of 3.1+14.367 is:
*17.467 *17.47 *17.50 *17.5
17. The atmospheric pressures recorded in different places at the same time are given below.
|
Nathiagali |
Hunza |
Murree |
Gilgit |
|
700 torr |
650 torr |
710 torr |
600 torr |
Water will boil first in:
*Nathiagali *Hunza *Murree *Gilgit
1. The bond angle is maximum in this molecule:
*CH4 *CO2 *H2O *NH3
2. Gasses behave ideally at these conditions:
*High pressures and high temperatures *High pressures and low temperatures
*Low pressures and high temperatures *Low pressures and low temperatures
3. Glasses is a/an:
*Crystalline solid *Amorphous solid *Covalent solid *Ionic solid
4. Bond Energy is the greatest for:
*CH4 *O2 *N2 *Cl2
5. The bulk properties of a system, which are easily measurable, are known as:
*Microscopic properties *Chemical properties
*Macroscopic properties *Physical properties
6. The characteristic of 103 is:
*2 *3 *4 *5
7. This molecule has zero dipole moment:
*NH3 *CO2 *H2O *HCl
8.The molarity of a solution containing 20g NaOH dissolved into 1 dm3 solution will be:
*0.1 *0.5 *1 *2
9.The Octet rule is not valid for this molecule:
*N2 *O2 *N2 *H2
10. The yield of Ammonia in Haber’s process is favoured by:
*High pressure and high temperature *High pressure and low temperature
*Low pressure and low temperature *Low pressure and high temperature
11.This ion has greatest degree of hydration:
*Na+ *Mg+2 *Al+3 *K+
12. The volume of 3.01 x 1023 molecules of N2 gas at S.T.P. will be:
*3dm3 *11.2dm3 *22.4dm3 *28dm3
13. Rate = K [NH3]2. Keeping the other conditions same, if the concentration of NH3 is increased by four times, then the initial rate of reaction X will be:
*2X *4X *8X *16X
14. This is not extensive property:
*Entropy *Viscosity *Enthalpy *Internal Energy
15. The extent of reaction will be maxdimum for this Kc value:
*10-13 *0.1 *10 *103
16.This Hydrogen halide has the highest percentage of ionic character:
*HF *HCl *HBr *Hl
17. These have low values of activation energy:
*Slow reactions *Fast reactions *Moderate reactions *Ionic reactions
2015(Click here for video lecture)
(i) This one of the following pairs has the same number of molecules:
*10gH2& 10gCH4 *10gH2& 50gCH4 *10gH2& 80gCH4 *10gH2& 16gCH4
(ii) If a = b = c and α = β=γ = 90o then the shape of the crystal is:
*Cubic *Tetragonal *Hexagonal *Orthorhombic
(iii) The following pair of ions is isoelectronic:
*Na+& Ng2+ *F-& O- *Li+& Na+ *S2-& O2-
(iv) This one of the following colours has the shortest wavelength:
*Red *Blue *Violet *Orange
(v) The S.I. unit of Dipole moment is:
*dyne/cm *poise *Debye *Coulomb-metre
(vi) 1 Cal. Is equal to:
*0.239J *1.98J *4.184J *8.314J
(vii) When 2 moles of solute are present in 2dm3 of solution, then the concentration of the solution is:
*0.5 M *1 M *2 M *3 M
(viii) With an increase in temperature, a system involving exothermic reaction will:
*move in the forward direction *remain at equilibrium
*move in the reverse direction *none of these
(ix) The oxidation number of Sulphur in NaHSO4 is:
*-2 *0 *+4 *+6
(x)This not primary bond:
*Ionic bond *Covalent bond *Dative bond *Hydrogen bond
(xi) For the reaction 2NH3 ==== N2 + 3H2, the relationship between Kc and Kp is:
*Kp = Kc *Kp is greater than Kc *Kp is less thanKc *Kp is less than equal to Kc
(xii) Conduction in metals in due to the movement of:
*ions *electrons *protons *atoms
(xiii) The (n + l) value for 5d orbital is:
*4 *5 *6 *7
(xiv) Dipole moment of CS2 is zero. Hence, the bond angle is:
*90o *190.5o *120o *180o
(xv)The most favourable conditions of temperature and pressure for oxidation of SO2 into SO3 are:
*low temperature and high pressure *low temperature and lo pressure
*high temperature and high pressure *high temperature and low pressure
(xvi) The volume of 0.2M , H2SO4 required for the neutralization of 10cm3 of 0.1M NaOH is:
*2.5cm3 *5cm3 *10cm3 *15cm3
(xvii) Photochemical reactions, which proceed only under the influence of light, are of the order:
*Zero *First *Second *Third
2014(Click here for video lecture)
(i) If absolute temperature is doubled and pressure increased to 4 times, the volume:
*is halved *is doubled *becomes four times *remains unchanged
(ii) Additions of KCL to AgCl solutions causes:
*Increase in the ionization of AgCl *Decrease in the ionization of AgCl
*No effects on the ionization of AgCl *Increase in the concentration of Ag ion
(iii) Metals placed above hydrogen in the Electrochemical series:
*Are reducing agents *are oxidizing agents
*serve as cathode in comparison cell *have positive electrode potential
(iv) During experiments, average of several replicate measurements is taken because:
* It has no negative error *it shows positive error
*it has no systematic error *it is more reliable
(v) The basis of motor oil grading is:
*Viscosity *Surface Tension *Vapour pressure *Boiling point
(vi) Diamond is very haard because of:
*Sp2 hybridization *van der Wall’s forces
*Close packing of carbon atoms and large number of covalent bonds *Large amount of energy required to break the bonds
(vii) The colour of the universal indicator in basic solution is:
*Yellow *Green *Orange *Deep blue
(viii) In Pi-bond, electron density lies:
*only above the nodal plane *only below the nodal plane
*on the nodal plane *both above and below the nodal plane
(ix) When the product of ionic concentrations of sparingly soluble salt is equal to its solubility product (Ksp), the solution is said to be a:
*Dilute solution *Saturated solution *super saturated solution *Very dilute solution
(x) The presences of Hydrogen bonding in a liquid:
*Decrease the vapour pressure *decrease the boiling point
*decrease the viscosity *causes no effects on the physical properties of the liquid
(xi) The presence of Hydrogen bond is in between:
*10-20 KJ/mole *20-40 KJ/mole *40-50 KJ/mole *50-60 KJ/mole
(xii) The oxidation number of Mn in KMno4 is:
*+3 *+5 *+7 *+4
(xiii) If a ≠ b ≠ c and α = γ = 90o then the shape of the crystal is:
*Monoclinic *Tetragonal *Hexagonal *Orthorhombic
(xiv) Any real or imaginary line or wall, which separates a system from its surroundings, is called the:
*System *Boundary *State *Surrounding
(xiv) The value of Plank’s constant ‘h’ is:
*4.803 x 10-10e.s.u *9.1 x 10 -31kg *6.625 x 10-34 J.S *1.602 x 10-34kg
(xv) The pH of Milk of Magnesia is:
*10.5 *10.0 *10.8 *11.0
(xvi) The percentage dissociation of NH4OH is:
*1.2% *1.4% *1.9% *2.1%
2013(Click here for video lecture)
(i) The number of moles in 58.5 gm of NaCl is:
*8.5 *1 *35.5 *23
(ii) The empirical formula of a compound is CH2O and molecular mass is 60, its molecular formula is:
*CH2O *C2H4O2 *C3H6O3 *C4H8O4
(iii) If a = b = c and α = β=γ = 90o then the shape of the crystal is:
*Cubic *Tetragonal *Hexagonal *Orthorhombic
(iv) The vapor pressure of water at 100oC is:
*760 torr *76 torr *14.2 psi *none of these
(v) This colour has the shortest wavelength in the visible spectrum of light:
*Red *Violet * Green *yellow
(vi) The n+l value of 4p orbital is:
*2 *5 *7 *4
(vii) The bond formed in fluorine molecule is due to this overlap of orbital:
*s-s *s-p *p-p *none of these
(viii) Bond energy of C=C as compared to that of C=C is:
*greater *lesser *same *none of these
(ix) This chemical method is used for determining the rate of reaction:
* Physical method *calorimetric method *Polarimetric method *Hydrolysis
(x) A heterogeneous system consists of:
*only one phase *three phases *more than one phase *two phases
(xi) In this, electric current is produced by an oxidation reduction process:
* Standard cell *Voltaic cell *Reversible cell *Electrolytic cell
(xii) Among these solutions, this one has the highest pH value:
*0.01 M NaOH *0.02 M HCl *0.01 NaHCO3 *0.1 M H2SO4
(xiii) This salt will hydrolyze in water:
* Nacl *NH4Cl *KCl *Na2SO4
(xiv) The heat content of a system is called:
* Internal energy *Enthalpy *Entropy *Potential energy
(xv) The angle between sp3 orbital is:
* 127o *109.5o *180o *90o
(xvi) This series of lines is produced when the electron jumps from the 4th orbit to the 2nd orbit:
*Lyman *Balmer * Brackett *Paschen
(xvii) Precipitation occurs if the ionic concentration is:
*less than Ksp *more than Ksp *equal to Ksp *none of these
sir gi thnx
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