PPSC Chemistry Full Book Test With Answers

image
image
image

PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following statements is not correct with respect to applications of Hammett equations. It develops a quantitative relationship between structure and reactivity This equation on can be used to calculate the value of pK<sub>a</sub> This equation does not help to calculate the rate of some reactions This equation has mechanistic implications
2 The equation which relates the reaction rates and equilibrium constants of many reactions is known as. Taft equation Hammett equation Differential equation Linear equation
3 Which of the following haloacids is stronger acids. FCH2COOH ClCH2COOH Br CH2COOH ICH2COOH
4 Which of the following groups exert -1 effect. - NO2 - CN -COOH &lt;C = 0
5 Which of the following factors effect the strengths of acids and bases. Inductive effect Romance effect Hydrogen effect All above
6 Which of the following statements not correct with the concept of Bronsted concept of acids and bases. An acid can donate a proton A base can accept a proton This concept has many bases that have OH- ions This concept is more general
7 Which of of the following statement is not correct in respect of
Arrhenius concept.
 This concept is applicable only for aqueous systems. Neutralization takes place in aqueous medium only H+ ion concept remain as such in water This concept is applicable for non aqueous system only.
8 Inorganic acids (HCl, HBr, HNO3 etc) have K value. &lt; 1 &gt;1 &gt;10 &lt;10
9 Which of the following statements do not represent Lewis idea of acids and base? Compounds which have completely filled orbitals Compounds which have incompletely filled orbitals Compounds in which the central atom can expand its octel All simple metal ions like Ag+, Al3+ etc.
10 Which of the following does not represent Lewis base. Pyridine NaNH2 PCl3 NaOH
11 Which of the following does not represent Lewis acid. ZnCl2 FeCl2 BF3 Bul4
12 Which of the following pairs does not represent Lowery acid base pair. H2O+NH3 H2O +H2O HCL + H2O CH3NH2 + BF3
13 Which of the following statements is not correct with the concept of Bronsted concept of acids and bases. An acid can donate a proton A base can accept a proton This concept has many bases that have OH- ions This concept is more general
14 Which of the following statement is not correct n respect of Arrhenius concept. The concept is applicable only for aqueous systems. Neutralization takes place in aqueous mediam only TH+ ion cannot remain as such in water This concept is applicable for non aqueous system only.
15 Which of the following is strong adheaive. Epoxy resin Melamine -formadehyde resin Alkyd resins Bakelite
16 SAN is a polymer of Styrene Acrylonitrile Both A and B Vinyl chloride
17 Which of the following polymers is chlorinated. Orlon Neoprene Dacron None of these
18 Soft drinks and baby feeding bottles are generally made up Polyeater Polyurethens Polyamide Polyetyrene
19 What type of inter molecular force present in nylon-66o Vander wall Hydrogen bond Dipole -dipole interactions Sulphide linkage
20 Which is not true about polymers. Polymers do not carry any charge Polymers have high viscosity Polymers scatter light Polymers have low molecular weight
21 Which of the following contains isoprene unite. Natural rubber Nylong -6,6 Polyethylene Decron
22 Orion is polymer of. Styrene CF2 = CF2 Vinyl chloride Acrylontrile
23 Which of the following is used to make non-stick material. Vinyl cyanide Tetrafluoroethene Vinyl chloride Styrene
24 Monomer of neoprene rubber to 1-chloro 1,3- butadiene 2- chlro, 1,3-butadiene 2-Bromo -1,3- butadiene 2-Methyl 1,3-butadiene
25 Monomers are Teflon is Monochloroethene 1,2- Difluoroethene 1,1,2- Trifluoroethene Tetrafluoroethene
26 In order to give strength and elasticity natural rubber is heated with. Sulphur Oxygen Nitrogen Chlorine
27 Gutta percha is Cis poly imprene Trans -polyisoprene Polyethylene Polyisobutylene
28 Monomer of natural rubber is 1,3-Butadiene 2-Methyl -1,3-butadiene 1,2 -Butadiene 1,3 - Pentadiene
29 In which polymer the strength of inter molecular forces is maximum Elastomers Thermoplastic Fibre Cross linked polymer
30 High density polyethylene has which type of structure. Linear Branch chain Cross linked Any one of these
Download This Set

Is this page helpful?

×