Question

2. Which group of elements includes the most reactive of all the metallic elements?
   1. alkali metals
   2. alkaline earth metals
   3. coinage metals (Group 1B)
   4. transition metals
   5. Group 2B metals

3. Determine all of the covalent hydrides from the compounds listed below.
   1. CaH2
   2. H2S
   3. SiH4

1. I only
2. II only
3. I and II
4. I and III
5. II and III

4. Based on the following options, select the substance with hydrogen in the +1 oxidation state.

1. KH
2. CH4
3. H2
4. AlH3
5. SrH2

5. Which of these substances is being considered as a replacement fuel for gasoline?

1. D2O
2. H2
3. NO2
4. F2
5. He

6. Phosphoric acid is the most important of the phosphorus oxoacids. Industrially, phosphoric acid is prepared by

1. the Ostwald process.
2. the Haber process.
3. the reaction of phosphate rock with sulfuric acid.
4. the reaction of P4O10 with water.
5. the Frasch process.

7. Which of the following choices is/are ionic oxides?
   1. SrO
   2. SiO2
   3. SO2

1. I only
2. II only
3. III only
4. I and II
5. II and III

8. Which one of the following compounds can react with water to form oxygen gas?

1. PCl5
2. NO2
3. H2O2
4. KH
5. NH3

9. Which one of the following compounds can react with water to form hydrogen gas?

1. PCl5
2. NO2
3. H2O2
4. KH
5. NH3

Answer 1

all more outer mest electer 22. A1 kali metals ale, most reactive of all the metallic elements They are also called I A group metals. They have more elecbeo positivity natale and they can loss the easily iso that they Reachive. option [a is correct Has and sitty ale covalenk Hydredes. In covalent Hydeides, the two Elements must be non metals. It, S, and si ale non metals option is correct Cap In metal Hydrides, ty degen exhebit hoxedadation state. Im covalent Hy deides, it exhibit ji oxidation state City Hydegen exhibit tiocidation stule is correctie 3) In ) ІВ option 4) H₂ is used as commerical fuel cell rechicles. correet option 'Blis