II. Fill in the Blanks<br />
Fill in the blanks with suitable word/s.<br />
1. Metals are _____ of heat and _____.<br />
2. Iodine is a _____ having lustre.<br />
3. _____ and _____ are kept in kerosene to avoid explosion.<br />
4. Non-metal oxides are _____ in nature.<br />
5. _____ is more reactive than copper.<br />
6. Sulphur forms _____ oxides.<br />
7. Magnesium forms _____ oxides.<br />
8. _____ is less reactive than iron.<br />
9. All metals are hard except _____ and _____.<br />
10. Metals have generally _____ melting and boiling points.<br />
11. _____ are used in medicines as antiseptic.<br />
12. The only liquid metal is _____.<br />
13. _____ is non-metal used in breathing by all living beings.<br />
14. The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is _____.<br />
15. _____ reacts with cold water vigorously.नॉन मेटल ऑक्साइड इंडस
Answers
Answer:
Explanation:
1. GOOD CONDUCTOR AND LIGHT
2 NON METAL
3.SODIUM AND POTTASIUM
4)ACIDIC
5)SODIUM
6)ACIDIC
7)MAGNESIUM OXIDE
8)COPPER
Answer:
Phosphorous is very reactive non metal.
Phosphorus is a solid. A highly reactive, poisonous, non-metallic element occurring naturally in phosphates, especially apatite, and existing in three allotropic forms, white (or sometimes yellow), red and black.
(b) Metals are good conductors of heat and electricity.
Atoms of metals readily lose their outer shell electrons, resulting in a free flowing cloud of electrons within their otherwise solid arrangement. This provides the ability of metallic substances to easily transmit heat and electricity.
(c) Iron is more reactive than copper.
Iron is high on reactivity series as compared to copper so it is more reactive than copper.
(d) Metals react with acids to produce hydrogen gas.
The products of acid/metal reactions are a salt and hydrogen gas. Some metals are so unreactive that they do not react with dilute acids at all, e.g. copper, silver and gold.