|Solved Chemistry MCQS|
Just like PPSC, FPSC, CSS, PMS, MCAT, ECAT, NAT and others important exams in which chemistry question answers inculuded.
Q.1: The reasons for less experimental yield than theoretical yield are reversible reaction, side reaction and ?
Q.2: An ion having negative charge is called ?
Q.3: Which statement about gases is not CORRECT ?
- There are large spaces between the molecules
- They spread throughout the vessel
- Molecules are arranged regularly
- Pressure is due to collision
Q.4: Which of the following assumptions is not belonging in kinetic molecular theory of gases ?
- Molecules remove randomly
- There is no force attraction between molecules
- The size of molecules is negligible
- Collisions between molecules is inelastic
Q.5: According to Planck energy travels is a discontinuous manner and it is composed of large number of tiny discrete units called ?
Q.6: The dipole moment of water is ?
- 1.08 D
- 8.0 D
- 1.84 D
- 1.94 D
Q.7: The SI unit of heat + energy is ?
- None of the above
Q.8: Which element has maximum binding energy ?
Q.9: Which is an inert gas ?
Q.10: Picric acid forms when phenol reacts with ?
- Sulphuric acid
- Nitric acid
Q.11: Which has insulating effect on nervous system ?
Q.12: Grape sugar or blood sugar is called to ?
- Glucose and Fructose
Q.13: Cannizzaro's reaction is not given by ?
Q.14: Which reaction is base catalysed ?
- Addition of Grignard's reagent
- Addition of sodium bisulphate
- Addition of HCN
Q.15: Esters are used as ?
- Artificial flowers
Q.16: Height of the liquid risen in the capillary tube depends upon the ?
- Length of capillary tube
- Material of capillary tube
- Diameter of capillary tube
- Temperature of liquid
Q.17: The S.I units of dipole moments are ?
- Joule meter
- Coulomb meter
Q.18: Which acid is used in the manufacture of synthetic fibre ?
- Carbonic acid
- Acetic acid
- Oxalic acid
- Formic acid
Q.19: A zero order reaction is one in which ?
- One reactant s in large excess.
- Reactants do not react.
- Rate is not affected by changing concentration of reactants.
- Concentration of reactant do not change with passage of time.
Q.20: Pentane has isomers ?
Q.21: Major component of natural gas is ?
Q.22: SN₂ reactions can be best carried out with ?
- Sec. Alkyl halide
- All the three
- Pri. Alkylhalide
- Ter. Alkyl halide
Q.23: pH of pure water is ?
Q.24: The Chaghi Hilla are located ?
- Near Quetta
- At China border
- Pak-Afghan border
- Near Sibi
Q.25: Which of the following is the oldest dam of Pakistan ?
- Gomal zam
Q.26: Sodium belongs to block of periodic table ?
Q.27: Phenols are derivative of ?
Q.28: The non-conductor, usually gaseous and volatile hydrides are ?
Q.29: Which term was derived from atomos ?
Q.30: Amongst the following, the compound that can be most readily sulphonated is ?
Q.31: A solution of glucose is 10%. The volume to which 1g mole of it dissolved will be ?
- 1.8 dm³
- 8.1 dm³
- 1.7 dm³
- 6.1 dm³
Q.32: A solution is a homogeneous mixture of two or more kinds of different ?
- Molecular substances and Ionic substances
- Covalent substances
- Ionic substances
- Molecular substances
Q.33: Which element does not belong to III-A group ?
Q.34: All gases can be compressed by ?
- Keeping constant pressure
- Increasing pressure
- None of the above
- Decreasing pressure
Q.35: If a system at equilibrium is disturbed by some change, the system will shift so as to counteract the effect of changes is the ?
- Le chatlier's principle
- Law of mass action
- Equilibrium state
- First law of thermo dynamics
Q.36: Saturated hydrocarbons are called ?
- Alicyclic hydrocarbons
Q.37: Alkali metals possess one electron in the outer most ?
- S orbital
- D orbital
- F orbital
- P orbital
Q.38: Entropy is a measure of -------------- system ?
- Internal energy
Q.39: A state function represents ?
- Exothermic state
- Chemical state
- Physical state
- None of the above
Q.40: Cholesterol is the precursor of steroid hormones belonging to class of compounds ?
Q.41: The brown gas formed when metal reduces HNO₃ is ?
Q.42: Bakelite is a ?
- Simple molecules
- Macromolecules or adduct
- Minor molecules
Q.43: A good reservoirs of energy to body is ?
Q.44: Protein molecule is a molecule having molecular mass greater than ?
- 100, 000
- 1000, 000
- 10, 000
Q.45: A substance having only sigma bond gives reaction ?
Q.46: The SI unit for measurement of pressure is ?
- Pounds per square inch (PSI)
- Newton (N)
- Atmosphere (atm)
- Pascal (Pa)
Q.47: Dobereiner arranged similar elements into groups called ?
Q.48: Geological survey of Pakistan estimates about billion tons of coal in Pakistan ?
Q.49: Alkanes with same number of carbons as in Grignard’s reagent can be prepared by its reaction with ?
Q.50: The e/m value for positive rays is maximum ?