Question

Q. 6. 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
Q.7. Guard cells are usually
(a) kidney shaped (b) rectangular
pear shaped (d) spherical shaped​

Answer 1

6) c) sodium is kept open in air

This is incorrect bcz sodium catches fire when kept in air so it is kept in kerosene.

7 a) kidney shaped

Hope it help

Answer 2

Answer:

Q6 option 3 is incorrect

Q7 option 4 is incorrect

Explanation:

all the other options are correct but sodium is not kept open in air because it is highly reactive.

in Q7

shape of guard cells vary from plant to plant but guard cells cannot be in the shape of sphere .

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