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Solved Chemistry Multiple Choice Question Answers

Q.1: The cooling of molten urea by air in the tower is called--------- ?

1. prilling
2. evaporation
3. condensation
4. crystallization

A

Q.2: Which of the following is not a heavy industry ?

1. iron
2. fertilizer
3. paper
4. none

D

Q.3: Saponification is the hydrolysis of fat or oil with an------- ?

1. Acid
2. Alkali
3. Enzyme and alkali
4. Enzyme and acid

B

Q.4: Amylose is---------- ?

1. Soluble in water
2. Insoluble in water
3. Soluble in alcohol
4. Partially soluble in alcohol

A

Q.5: In complex compounds the oxidation number is written in------- ?

1. English
2. Greek
3. Roman numeral
4. Hebrew

C

Q.6: The important monomers of acryclic resins is---------- ?

1. Vinyl chloride
2. Styrene
3. Methylmethacrylate
4. 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 ?

1. 0
2. 1
3. 2
4. NONE OF THESE

C

Q.8: Which of the following is not a condition for the formation of smog ?

1. sufficient NO
2. sunlight
3. less movement of air
4. winds

D

Q.9: The important function of burning zone in the rotary kilm is ---------- ?

1. to dry the moisture of slurry
2. to decompose lime stone to unslaked lime
3. combination of different oxides like CaO SiO2 Fe2O3 and Al2O3
4. to reduce the impurities

C

Q.10: Which substance can be used for disinfecting water ?

1. KMnO4
2. Alums
3. Ozone
4. All

A

Q.11: Nylon is obtained by heating----------- ?

1. Acrylic acid
2. Epichlorohydrin
3. Vinyl chloride
4. Adipic acid with hexamethylene diamine

D

Q.12: Protein attached to some non protein group is called--------- ?

1. Derived protein
2. Sample protein
3. Proteoses
4. Conjugated protein

D

Q.13: Polymers described as large molecules built up from small repeating units called-------- ?

1. Biopolymers
2. Dimers
3. Monomers
4. metamers

C

Q.14: The nitrogenous base different in RNA as compared to DNA is------- ?

1. Cytosine
2. Thymine
3. Adenine
4. Guanine

B

Q.15: The process of polymerization was classified by---------- ?

1. Strecker
2. Sabatier
3. Runge
4. W. H. Carothers

D

Q.16: K2 (Cu(CN)4) which one is correct----------- ?

1. Potassium tetra cyano cupperate
2. Co-ordination number is 2
3. Ligand is positively charged
4. Central atom is present in avionic sphere

D

Q.17: Major cause of SO2 on global scale is----------- ?

1. volcanoes
2. electric sparks
3. combustion
4. all

A

Q.18: Chlorination of water may be harmful if the water contains--------- ?

1. Ammonia
2. Dissolved oxygen
3. Carbon dixide
4. All

A

Q.19: Which of the following are the conditions of colligative properties--------- ?

1. Non-electrolye solute
2. Non-volatile solute
3. Dilute solution
4. All of the above

D

Q.20: Solubility of KCIO3 gives-------- ?

1. continuous and falling solubility curve
2. discontinuous and falling solubility curve
3. continuous and rising solubility curve
4. discontinuous and rising solubility curve

C