Name the gas that can readily decolourise acidified KMnO4 solution.
(1) CO2
(2) SO2
(3) NO2
(4) P2O5
Consider the following statements in respect of oxides of sulphur.
(1) In gas phase molecule is V-shape.
(2) In gas phase molecule is planar.
(3) is cyclic trimer.
Which of the above statements are correct ?
(1) 1 and 2 only
(2) 2 and 3 only
(3) 1 and 3 only
(4) 1, 2 and 3
Which parent oxy acid does not have its own hypo acid?
1. H2SO2
2. HNO2
3. H3PO3
4. HClO3
Cl2(g) + Ba(OH)2 → X(aq) + BaCl2 + H2O
X + H2SO4 → Y + BaSO4
Y \(\xrightarrow[]{\Delta \ > \ 365 \ K}\) Z + H2O + O2
Y and Z are respectively :
1. HClO4, ClO2
2. HClO3, ClO2
3. HClO3, ClO6
4. HClO4, Cl2O7
The correct statement among the following is when are separately hydrolyzed;
Incorrect statement regarding following reactions is :
(a) 'X' is explosive
(b) 'Y' is an oxyacid of xenon
(c) Both are example of non-redox reaction
(d) can undergo partial hydrolysis
The incorrect order is:
(Unbalanced equations)
[Y] May be prepared by which one of the following methods?
[A] By dehydration of malonic acid with
[B] By thermal decomposition of carbon sub-oxide in air.
[C] By heating potassium hyxacyaanoferrate (II) with conic
[D] By the action of conc. on charcoal
A brown-coloured mixture of two gases is obtained by reducing 6 N nitric acid with metallic copper. This mixture on cooling condenses to a blue liquid which on freezing (-30 oC) gives a blue solid. The correct statement for the blue liquid or solid is:
1. | It is referred to as the anhydride of nitrous acid. |
2. | It is an acidic oxide. Hence, it dissolves in alkalies producing nitrites. |
3. | It can also be prepared by the action of 50 % HNO3 on arsenious oxide and then cooling to 250 K. |
4. | All of the above. |
What is produced when orthophosphoric acid reacts with phosphate rock (fluorapatite)?
1.
2.
3.
4.
One of the products of the following reaction is :
(A) (B)
(C) (D) and both
Which of the following is correct?
(1) – contains no S - S linkage.
(2) – contains – O - O linkage.
(3) – contains P – P linkage.
(4) - contains S – S linkage.
Which of the following statements is false?
1. | H3PO2, H3PO3 and H3PO4 all are tribasic and reducing in nature. |
2. | Amongst anions \(NO_{3}^{-}\), \(SO_{3}^{2-}\), \(CO_{3}^{2-}\), and \(BO_{3}^{3-}\), only \(SO_{3}^{2-}\) have pπ-dπ bonding . |
3. | Amongst anions \(SO_{3}^{2-}\), \(SO_{4}^{2-}\), \(S_{2}O_{4}^{2-}\) and \(HSO_{4}^{-}\), \(SO_{3}^{2-}\) is basic and reducing in nature. |
4. | Number of lone pair(s) of electrons on Xe atoms in XeF2, XeF4 and XeF6 are 3, 2 and 1 respectively._ |
Which one of the following does not exist?
1. XeOF4
2. NeF2
3. XeF2
4. XeF6
The least acidic oxide among the following is:
1. P4O6
2. P4O10
3. As4O6
4. As4O10
What order does the stability of interhalogen compounds follow?
1. IF3 > BrF3 > CIF3
2. BrF3 > IF3 > ClF3
3. ClF3 > BrF3 > IF3
4. ClF3 > IF3 > BrF3
The bleaching action of bleaching powder is due to the formation of :
1.
2.
3.
4.