Bihar Board Chemistry Objective Answer

I want the sample objective question answers of Chemistry of 12th Science of Bihar Board so can you please provide me?

[Pathak]

Ok, as you want the sample objective question answers of Chemistry of 12th Science of Bihar Board so here I am providing you.

Bihar Board12th Science Chemistry MCQ

For a process at 451 K and constant pressure, Ssurr is-326 J K − 1. Calculate the quantity of heat (in kJ) absorbed by the system.

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Which of the following produces an INCREASE in entropy of the system?

H2O (l) → H2O (s)
2O2 (g) + 2SO (g) → 2SO3 (g)
2CH3OH (g) + 3O2 (g) → 2CO2 (g) + 4H2O (l)
I2 (s) → I2 (l)
None of the above:

For a particular chemical reaction at 400OC, G = -67 kJ. Calculate the time (in seconds) it will take for the reaction to reach completion.

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For a particular chemical reaction, Ho is positive and So is negative. Which of the following statements about the spontaneity of the reaction under standard conditions is TRUE?

The reaction will be spontaneous only if the magnitude of Ho is large enough to overcome the unfavorable entropy change.

The reaction will be spontaneous only if the magnitude of So is large enough to overcome the unfavorable enthalpy change.

The reaction will be spontaneous regardless of the magnitudes of Ho and So. The reaction cannot be spontaneous.

The reaction will be spontaneous only of Go is positive.

Bihar Board12th Science Chemistry MCQ

Hi buddy here I am looking for Bihar Board Chemistry Objective paper Answer key so will you plz let me know from where I can do collect its question paper answer key ??

[sumit]

As you are asking for Bihar Board Chemistry Objective paper Answer key, so on your demand I am providing same here :

Q1. CH3CH2NH2 is known as

Answer Ethyl amine (A)

Q 2. H2 SO4 is a

Answer Dibasic Acid (A)

Q 3. Over production of acid in the stomach can be controlled by

Answer- Antacid (A)

Q 4. IUPAC name of CH3COOH is

Answer Methanoic acid (A)

Q 5. Chief ore of Iron is

Answer All (D)

Q 6. Dettol is used as

Answer Antiseptic (B)

Q 7. Ammonia changes the moist red litmus paper into

Answer Green (B)

Q 8. PH of pure water is

Answer 7 (D)

Q 9. Which of the following gas cannot be collected over water?

Answer SO2 (C )

Q- 10 Formula of Sucrose is

Answer C12H22O11 (B)

Q 11 The symbol of Helium is

Answer- He (A)

Q 12. Copper metal is purified by which of the following method?

Answer Electrolytic refining (A)

Q 13. One Faraday electricity is equal to how much coulombs?

Answer- 96500 (B)

Q 14. Second perid of table contain elements:

Answer 8 (B)

Q 15. Number of () Sigma bonds in CH4 is

Answer 4 (A)

Q 16. The Function group of alcohol is

Answer (- OH) (D)

Q 17. PCI 5 is a-

Answer Oxidising Agent (A)

Q 18. The formula of Nitric acid is

Answer HN03 (A)

Q 19. The hybridsation of N in NH3 is

Answer SP 3 ( A)

Q 20. Polythene is polymer of

Answer Ethene (B)

Q 21. Nitrogen & Oxygen are

Answer Metals (A)

Q 22. Buna N and Buna S are

Answer Synthetic rubber (B)

Q 23. The oxidation number of Fe in K4 [Fe(CN)6] is

Answer + 3 ( B )

Q 24. Alcohol is formed when one of the hydrogen if Alkane is replaced by

Answer Chloro group ( D )

Q 25. White and yellow phosphorous are

Answer Isotones (D)

Q 26. Which of the following gas is mono atomic ?

Answer Helium ( B )

Q 27. Nitric acid is prepared by

Answer Photosyntiesis ( C )

Q 28. Drug used to reduce fever is called

Answer Antipyretic ( A )

Q 29. The name of the compound OH is-

Answer Phenol (B)

Q 30. Transition elements are also know as

Answer d block elements (C)

Q 31. Group I Elements of Periodic Table are know as-

Answer Alkali Metals (A)

Q 32. A process of heating ore of metal in excess of air below its melting point is called

Answer Roasting (A)

Q 33. Carbohydrate which yield there to then mono Sachcaride units on hydrolysis is called

Answer Oligosacchariede ( C )

Q 34. Ke [Fe(CN)6] is a

Answer Complex Compound (B)

Q 35. Oleum is composed of H2SO4 and which constituent ?

Answer H2S (C)