+91-93193 64476
FlagBACK
Flag 11 grade chemistry others> A white solid which is yellow when hot bu...
question mark

A white solid which is yellow when hot but changes to white again on cooling is _______

  • A. PbO
  • B. CaO
  • C. Ag₂O
  • D. ZnO

Aniket Singh , 8 Months ago
Grade
anser 1 Answers
Askiitians Tutor Team

The substance you are describing is PbO, which stands for lead(II) oxide. This compound appears yellow when heated and reverts to a white color upon cooling. Here’s a brief overview of the options:

Options Analysis

  • A. PbO: Yellow when hot, white when cool.
  • B. CaO: Typically remains white.
  • C. Ag₂O: Usually brown or black.
  • D. ZnO: Generally white, does not change color with temperature.

Thus, the correct answer is A. PbO.

ApprovedApproved
Last Activity: 8 Months ago
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Other Related Questions on 11 grade chemistry others

question mark

Which of the following is likely to be least stable?

  • (A) Ca₄₀
  • (B) Mn₅₅
  • (C) Sn₁₁₉
  • (D) Al₃₀
Grade 11 > 11 grade chemistry others
1 Answer Available

Last Activity: 7 Months ago

question mark

Which of the following is not a Lewis acid?

  • A. BF₃
  • B. AlCl₃
  • C. FeCl₃
  • D. PH₃
Grade 11 > 11 grade chemistry others
1 Answer Available

Last Activity: 7 Months ago

question mark

Which of the following is not a property of compounds?

  • (A) They are made up of two or more kinds of atoms.
  • (B) They cannot be broken down into two or more simpler substances by physical means but by chemical means only.
  • (C) Properties of compounds differ from those of their elements.
  • (D) None of the above.
Grade 11 > 11 grade chemistry others
1 Answer Available

Last Activity: 7 Months ago

question mark

Which of the following is polar?

  • A. NF₃
  • B. BF₃
  • C. SF₄
  • D. SiF₄
Grade 11 > 11 grade chemistry others
1 Answer Available

Last Activity: 7 Months ago

question mark

Which of the following metals exists in their native state in nature?

  • (i) Ca
  • (ii) Au
  • (iii) Zn
  • (iv) Ag

A. (i) and (ii)

B. (ii) and (iii)

C. (ii) and (iv)

D. (iii) and (iv)

Grade 11 > 11 grade chemistry others
1 Answer Available

Last Activity: 7 Months ago