Chemistry Most VVI Objective Questions
Bihar board class 12th chemistry most vvi objective question and answer
1. The temperature coefficient of most of the reaction lies between which of the following ?
A. 2 and 3
B. 1 and 2
C. 2 and 4
D. 3 and 4
Ans – (A)
2. which of the following is not a lyophilic colloid ?
A. Milk
B. Gun
C. Fog
D. Blood
Ans – (C)
3. which of the following enzyme is used in the hydrolysis of starch ?
A. Maltase
B. Zymase
C. Invertase
D. Diastase
Ans – (D)
4. The rate of chemisorption :
A. decreases with increases in pressure
B. Is independence of pressures
C. Is maximum at one atmospheric pressure
D. Increase with increase in pressure
Ans – (D)
5. The most abundant metal in Earth crust is :
A. Al
B. Fe
C. Ca
D. Na
Ans – (A)
Chemistry Most VVI Objective Questions
6. Which of the following is reduced to get a secondary amine ?
A. Nitrile
B. Nitro compound
C. Carbylamine
D. Amide
Ans – (C)
7. Enzymes are :
A. carbohydrates
B. liquids
C. proteins
D. none of these
Ans – C
8. Cane sugar on hydrolysis gives which of the following ?
A. only glucose
B. glucose and maltose
C. glucose and fructose
D. glucose and lactose
Ans – (C)
9. the number of Bravais lattices in cubic crystal is :
A. 3
B. 1
C. 4
D. 14
Ans – (A)
10. An octahedral void is surrounded by which of the following numbers of spheres ?
A. 4
B. 6
C. 8
D. 12
Ans – (B)
11. which of the following types of defect causes a disease in density of crystal ?
A. Frenkel
B. Schottky
C. Interstitial
D. F-centre
Ans – (B)
12. An example of colligative property of a solution is :
A. density
B. mass
C. Elevation of boiling point
D. Temperature
Ans – (C)
Bihar board class 12th chemistry
13. The number of moles of solute per kg of solvent is called :
A. Molarity
B. Molality
C. Normality
D. Mole Fraction
Ans – (B)
14. Solutions which boil at a constant temperature without any change in compassion is called :
A. Azeotropic mixture
B. Unsaturated
C. Supersaturated
D. Ideal
Ans – (A)
15. which of the following is not an actinide ?
A. Curium
B. Californium
C. Uranium
D. Terbium
Ans – (D)
16. vitamin C is :
A. Ascorbic acid
B. Nicotinic acid
C. Citric acid
D. Tartaric acid
Ans – (A)
17. which one of the following contains cobalt ?
A. chlorophyll
B. hemoglobin
C. vitamin C
D. vitamin B
Ans – D
18. which of the following is an addition polymer ?
A. Nylon-6
B. Nylon-6, 6
C. High density polythene
D. Dacron
Ans – (C)
19. which of the following is not a board spectrum antibiotic ?
A. Tetracycline
B. Chloromycetin
C. Penicillin
D. None of these
Ans – (C)
20. which of the following is Gammexane ?
A. Chlorobenzene
B. DDT
C. Benzene Hexachloride
D. None of these
Ans – (C)
Bihar board class 12th chemistry
21. what happened when are lead storage battery is changed ?
A. lead dioxide dissolves
B. sulphuric acid is regenerated
C. lead electrode becomes coated with lead sulphate
D. The concentration of sulphuric acid decreases.
Ans – (B)
22. Hydrogen-oxygen cell is which of the following types of cell ?
A. Primary cell
B. secondary cell
C. fuel cell
D. lead storage sale
Ans – (C)
23. the rate of chemical reaction :
A. increases with time
B. decreases with time
C. main increase aur decrease with time
D. remain constant with time
Ans – (B)
24. which of the following does not give aldol condensation ?
A. methanal
B. ethanal
C. Propanone
D. Propanal
Ans – (A)
25. When formaldehyde reacts with NH3 then which of the following compounds is formed ?
A. Formaldehyde ammonia
B. Hexamethylene tetramine
C. Formaline
D. Propanal
Ans – (A)
26. by which of the following can formic acid and formaldehyde be distinguished ?
A. Bendicts’s solution
B. Tollen’s reagent
C. Fehling’s solution
D. Sodium bicarbonate
Ans – (D)
27. Sulphide ores are generally concentrated by which of the following ?
A. gravity separation process
B. Magnetic sepration process
C. Froth floatation process
D. Carbon reduction process
Ans – (C)
class 12th chemistry
28. which of the following metal is not extracted by the process of electrolysis ?
A. Na
B. Mg
C. Al
D. Fe
Ans – (D)
29. which of the following metal is purified by Hoope’s process ?
A. Cu
B. Mg
C. Al
D. Fe
Ans – (B)
30. which of the following is the gas with lowest boiling point ?
A. hydrogen
B. helium
C. nitrogen
D. argon
Ans – (B)
