Nitrogen And Oxygen - 5

Chemistry Class 10
1. Ammonia is prepared in the laboratory by heating a mixture of ________ and slaked line.


Chemistry Class 10
2. Nitric Acid reacts with metal oxides and hydroxides to give


Chemistry Class 10
3. SO2 + 2NaOH(aq) ------------> _________ + H2O.


Chemistry Class 10
4. Amphoteric oxide are usually formed when oxygen reacts with less ________ element.


Chemistry Class 10
5. Ammonia and Carbon dioxide reacts at high temperature and pressure to give ________.


Chemistry Class 10
6. Basic oxides are formed when oxygen reacts with ________.


Chemistry Class 10
7. Redox reaction is a chemical reaction in which the _________ of an element is changed.


Chemistry Class 10
8. Cuo --------------> Cu2++2e- is a _______ reaction.


Chemistry Class 10
9. Ozone is prepared commercially by silent electric discharge through ________.


Chemistry Class 10
10. The layer very close to earth where we live is called ____


Chemistry Class 10
11. The concentration of ozone in stratosphere is ________.


Chemistry Class 10
12. Increased quantities of chlorofluoro carbons (Ccl3F, Ccl2F2) absorb ultraviolet radiation and react with ________.


Chemistry Class 10
13. Gain of electrons is called ________.


Chemistry Class 10
14. In ________ the valance number of oxygen is -1/2 .


Chemistry Class 10
15. A substance in an oxidation-reduction ( redox) reaction that loses electrons and whose oxidation number is increased during the reaction is called _________.


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