Chemistry online solved MCQs test of organic chemistry for preparations. Chemistry exam questions medicinal PPSC, CSS, NTS, PTS, PMS, OTS chemistry multiple choice questions and answers. Solved PSC questions General science Question Answers.
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Solved Chemistry Multiple Choice Question Answers
Q.1: The cooling of molten urea by air in the tower is called--------- ?
- prilling
- evaporation
- condensation
- crystallization
A
Q.2: Which of the following is not a heavy industry ?
- iron
- fertilizer
- paper
- none
D
Q.3: Saponification is the hydrolysis of fat or oil with an------- ?
- Acid
- Alkali
- Enzyme and alkali
- Enzyme and acid
B
Q.4: Amylose is---------- ?
- Soluble in water
- Insoluble in water
- Soluble in alcohol
- Partially soluble in alcohol
A
Q.5: In complex compounds the oxidation number is written in------- ?
- English
- Greek
- Roman numeral
- Hebrew
C
Q.6: The important monomers of acryclic resins is---------- ?
- Vinyl chloride
- Styrene
- Methylmethacrylate
- Hexamethylenediamine
C
Q.7: Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH ?
- 0
- 1
- 2
- NONE OF THESE
C
Q.8: Which of the following is not a condition for the formation of smog ?
- sufficient NO
- sunlight
- less movement of air
- winds
D
Q.9: The important function of burning zone in the rotary kilm is ---------- ?
- to dry the moisture of slurry
- to decompose lime stone to unslaked lime
- combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
- to reduce the impurities
C
Q.10: Which substance can be used for disinfecting water ?
- KMnO4
- Alums
- Ozone
- All
A
Q.11: Nylon is obtained by heating----------- ?
- Acrylic acid
- Epichlorohydrin
- Vinyl chloride
- Adipic acid with hexamethylene diamine
D
Q.12: Protein attached to some non protein group is called--------- ?
- Derived protein
- Sample protein
- Proteoses
- Conjugated protein
D
Q.13: Polymers described as large molecules built up from small repeating units called-------- ?
- Biopolymers
- Dimers
- Monomers
- metamers
C
Q.14: The nitrogenous base different in RNA as compared to DNA is------- ?
- Cytosine
- Thymine
- Adenine
- Guanine
B
Q.15: The process of polymerization was classified by---------- ?
- Strecker
- Sabatier
- Runge
- W. H. Carothers
D
Q.16: K2 (Cu(CN)4) which one is correct----------- ?
- Potassium tetra cyano cupperate
- Co-ordination number is 2
- Ligand is positively charged
- Central atom is present in avionic sphere
D
Q.17: Major cause of SO2 on global scale is----------- ?
- volcanoes
- electric sparks
- combustion
- all
A
Q.18: Chlorination of water may be harmful if the water contains--------- ?
- Ammonia
- Dissolved oxygen
- Carbon dixide
- All
A
Q.19: Which of the following are the conditions of colligative properties--------- ?
- Non-electrolye solute
- Non-volatile solute
- Dilute solution
- All of the above
D
Q.20: Solubility of KCIO3 gives-------- ?
- continuous and falling solubility curve
- discontinuous and falling solubility curve
- continuous and rising solubility curve
- discontinuous and rising solubility curve
C