How many of the following liberate `O_(2)` on heating in a dry test tube ? `CaO, Fe_(2)O_(3), Fe_(3)O_(4), FeO, Cr_(2)O_(3), XeF_(4), Al_(2)O_(3), MgO

Monjur Alahi

How many of the following liberate `O_(2)` on heating in a dry test tube ?
`CaO, Fe_(2)O_(3), Fe_(3)O_(4), FeO, Cr_(2)O_(3), XeF_(4), Al_(2)O_(3), MgO, Na_(2)O`


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

Correct Answer - `04.5`

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Iron is prepared from one of its ore hematite `Fe_(2)O_(3)` by reaction with carbon as follows: `Fe_(2)O_(3)(s)+C(s)rarrFe(s)+CO_(2)(g)uparrow` Above

`2Fe_(2)O_(3)(s)+3C(s)rarr12Fe(s)+3CO_(2)(g)uparrow` `n_(C)=(n_(Fe))/(4)xx3=(112)/(56)xx(3)/(4)` `w_(C)=(112)/(56)xx(3)/(4)xx18kg`

2 Answers 1 views
An open glass tube is immersed in mercury so that a length of `8 cm` of the tube projects above the mercury. The tube is then closed and raised throug

Correct Answer - `15.4 cm`

2 Answers 1 views
Complete the following reactions : (i)`XeF_(2)+H_(2)to , (ii)XeF_(6)+SiO_(2) to` (iii) `XeF_(6) + NH_(3) to` , (iv)`XeF_(6)+H_(2)O to` (v)`XeF_(6) + S

Correct Answer - (i)`XeF_(2)+H_(2)toXe+2HF` (ii)`2XeF_(6)+SiO_(2)to2XeOF_(4)+SiF_(4)`; `2XeOF_(4) + SiO_(2)to2XeO_(2)F_(2) + SiF_(4)` `2XeO_(2)F_(2) + SiO_(2)to2XeO_(3) ("Explosive")+SiF_(4)` (iii)`XeF_(6)+8NH_(3)toXe + 6NH_(4)F + N_(2)` (iv)`XeF_(6)+3H_(2)OtoXeO_(3) + 6HF` (v)`XeF_(6) + SbF_(5)to[XeF_(5)]^(+) [SbF_(6)]^(-)` [Addition ionic product is...

2 Answers 1 views
Give reasons : (i)Xenon does not form fluorides such as `XeF_(3) and XeF_(5)`.(ii)Out of noble gases, only xenon is known to form established chemical

Correct Answer - (i)All the filled orbitals of Xe have paired electrons.The promotions of one, two or three electrons from the 5p-filled orbitals to the 5 d-vacant orbitals will give...

2 Answers 1 views
Which of the following does not exist ? a) `XeOF_(4)` b) `NeF_(2)` c) `XeF_(2)` d) `XeF_(6)`

Correct Answer - A-pqr; B-pqrs; C-ps; D-p

2 Answers 1 views
How many compounds liberate `NH_(3)` on heating from the following ? (i) `(NH_(4))_(2)SO_(4) " " (ii) (NH_(4))_(2)CO_(3) " " (iii) NH_(4)Cl` (iv) `NH_

Correct Answer - 3 (I,ii, iii)

2 Answers 1 views
25 mL of a solution of `Fe^(2+)` ions was titrated with a solution of the oxidizing agent `Cr_(2)O_(7)^(2-)` . 50 mL of 0.01 M `K_(2)Cr_(2)O_(7)` solu

Correct Answer - 0.12 M.

2 Answers 1 views
Cold dil. `H_(2)SO_(4)` will completely dissolve : (i) Pb (ii) `Fe_(3)O_(4)` (iii) Fe (iv) Cu (v) Mg (vi) MgO (vii) `CoCO_(3)` (viii) `CuCO_(2)` (ix)

Correct Answer - 6(except i, iv and ix)

2 Answers 1 views
निम्नलिखित को ऑक्सीकृत करने के कितने कूलॉम विद्युत आवश्यक है ? (1) 1 मोल `H_(2) O` को `O_(2)` में । (2) 1 मोल `FeO` को `Fe_(2)O_(3)` में

Correct Answer - 2F, 1F

2 Answers 1 views
A house has 3 tube lights and two fans. Each tube light draws 40 W and each fan draws 80 W. On the average all the tube lights

Correct option is  C) 52 KWH

2 Answers 1 views
X