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CBSE Class 12-science Answered

why transistror cannot be used as rectifier.
Asked by | 02 Sep, 2008, 12:53: PM
Expert Answer

please ask the question in physics section.

Answered by | 02 Sep, 2008, 01:12: PM

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CBSE 12-science - Chemistry
1.     Which of the following is the most stable complex species? (a) [Fe(C2O4)3]3- (b) [Fe(CN)6]3- (c) [Fe(CO)5] (d) [Fe(H2O)6]3+  
Asked by paresh0311 | 01 Mar, 2023, 12:36: PM
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CBSE 12-science - Chemistry
Please answer fast Assertion (A): Zinc is not regarded as a transition element. Reason (R): In zinc, 3d orbitals are completely filled in its ground state as well as in its oxidised state. Select the correct answer to these questions from the codes (a), (b), (c) and (d) an given below. (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). (b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). (c) Assertion (A) is true, but Reason (R) is false. (d) Assertion (A) is false, but Reason (R) is true.  
Asked by sagarmishra | 01 Mar, 2023, 12:33: PM
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CBSE 12-science - Chemistry
Please answer Q.17 from board paper. Assertion (A): Nucleophilic substitution of iodoethane is easier than chloroethane. Reason (R): Bond energy of C — CI bond is less than C — I bond.
Asked by anubhutiupadhaya | 01 Mar, 2023, 12:30: PM
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CBSE 12-science - Chemistry
Please answer this: Give reasons for the following: (a) Carboxylic carbon is less electrophilic than Carbonyl carbon of aldehydes and ketones. (b) Propanal is more reactive than Propanone towards addition of HCN.
Asked by jayeshsah1995 | 01 Mar, 2023, 12:14: PM
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CBSE 12-science - Chemistry
Please answer fast. Write the equations involved in the presentation of KMnO4 from Pyrolusite ore
Asked by varma.renu9481 | 01 Mar, 2023, 12:09: PM
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CBSE 12-science - Chemistry
what is titration
Asked by elabarman58 | 23 Jan, 2023, 09:39: AM
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CBSE 12-science - Chemistry
what is titration
Asked by elabarman58 | 23 Jan, 2023, 09:38: AM
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CBSE 12-science - Chemistry
Amines are basic substance while amides are neutral
Asked by kaushiksahil779 | 19 Jan, 2023, 08:55: PM
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CBSE 12-science - Chemistry
write theequations for the preparation of ethyl chloride 
Asked by kingkhuzema92 | 15 Jan, 2023, 08:19: PM
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CBSE 12-science - Chemistry
What is atom
Asked by ahirvineet2005 | 12 Jan, 2023, 11:50: AM
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