Question

5)The conversion of vapours to liquid is known as....

6)The combination of calcium and fluorine makes the compound......

7)Oxygen gas contains.... atoms.

8)....gave the laws of chemical combination .

9)SI unit of measuring temperature is...

10)At 373K,water is at... state.

Q4. Match the followings. (5M)

Column A Column B

1)Boron i) Mg

2) Argon ii) Au

3) Zinc iii)Hg

4)Gold iv) B

5)Silver v) I

6)Magnesium vi) Fe

7) Potassium vii) Ar

8)Mercury viii) Ag

9)Iodine ix) Zn

10)Iron x) K​

Answer 1

Condensation

Mineral Fluorite

Two

Antoine Lavoisier

Kelvin scale

• Boron - B
• Argon - Ar
• Zinc - Zn
• Gold - Au
• Silver - Ag
• Magnesium - Mg
• Potassium - K
• Iodine - I
• Iron - Fe

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