Bihar board 12th Chemistry : बिहार बोर्ड का यह केमिस्ट्री का प्रश्न एक बार जरूर पढ़ें शायद यह एग्जाम में फिर से आ जाए।
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)
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)
Bihar Board Chemistry Objective Question
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)
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)
Bihar board 12th Chemistry
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)
बिहार बोर्ड से जुड़ी खबरों के लिए हमारे व्हाट्सएप ग्रुप से जुड़ जाएं ताकि आपको नई-नई प्रश्नों के साथ खबर भी मिलती रहे।
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