chemistry objective question class 12 bihar board

16. CHEMISTRY IN EVERYDAY LIFE1. The use of chemicals for treatment of diseases is called(A)…

15. POLYMERS1. Bakelite is an example of -(A) elastomer (B) fibre (c) thermoplastic (D)…

14. BIOMOLECULES1. On oxidation with a mild oxidising agent like Br2/H2O, the glucose is oxidized to(A)…

14.AMINES1. Nitrogen atom of amino group is ........... hybridised.(A) sp (B) sp2 (C) sp3 (D) sp3d…

12. ALDEHYDES, KETONES AND CARBOXYLIC ACIDS1. Propanone can be prepared from ethyne by(A) passing a…

11. ALCOHOLS, PHENOLS AND ETHERS1. One mole of ethyl acetate on treatment with an excess of LiAlH4 in dry…

10. HALOALKANES AND HALOARENES1. Good conductor of electricity and heat is(A) Anthracite coke (B)…

9. CO-ORDINATION COMPOUNDS1. K2 is a/an(A) double salt (B) complex salt (C) acid (D) base…

8. THE D- AND f-BLOCK ELEMENTS1. Oxidation number of gold metal is(A) + 1 (B) O (C) – 1 (D) all of…

7. THE P-BLOCK ELEMENTS1. Boron shows diagonal relation with(A) Al (B) C (C) Si (D) SnAnswer ⇒…