Question

Q1. Lime water is
(a) CaO
(b) Ca(OH)2
(c) CaCO3
(d) CaCI2

Q2. Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
(i)Good thermal conductivity
(ii)Good electrical conductivity
(iii) Ductility
(iv) High melting point

Q3. Which of the following is incorrect? *
(a)Zinc Oxide is called as amphoteric oxide
(b) Silicon counts among metalloids
(c) Sodium is kept open in air
(d) Metals conduct electricity



PLEASE TELL ME ANSWERS OF THESE THREE QUESTIONS ❣️ FAST PLEASE ITS URGENT ❣️​

Answer 1

Answer:

1. Ca(OH)2
2. good thermal conductivity, high melting point.

3.sodium is kept open in air...

Answer 2

$\huge \mathscr \red{ANSWER : }$

1) Lime water is Ca(OH)2.

2)Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?

Good thermal conductivity.

Explanation:-

Good thermal conductivity, malleability, light weight and high melting point are the properties of aluminium due to which it is used for making cooking utensils

3)Which of the following is incorrect? *

(a)Zinc Oxide is called as amphoteric oxide

(b) Silicon counts among metalloids

(c) Sodium is kept open in air

(d) Metals conduct electricity

Sodium kept open in air.

Explanation:-

Sodium kept in air , it will be burnt , so sodium kept in kerosene.