MEDIUM
Earn 100

Give the correct order of initials T or F for the following statements. Use T if the statement is true and F if it is false.

(I) Sulphide ions reacts with Na2[Fe(CN)5(NO)] to form a purple coloured compound Na4[Fe(CN)5(NOS)]. In the reaction, the oxidation state of iron changes

(II) Pt(IV) compounds are relatively more stable than Ni(IV) compounds

(III) The welding of magnesium can be done in the atmosphere of helium

(IV) LiAlH4 on hydrolysis will give H2

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Important Questions on Inorganic Chemistry in the Laboratory and in Industry

HARD
A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCI. The anion present in the inorganic salt is:
EASY
In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is
MEDIUM

Match List I with List II.

  List-I
(Anion)
  List-II
(gas evolved on reaction with dil. H2SO4)
(A) CO32- (I)

Colourless gas which turns lead acetate paper black.

(B) S2- (II)

Colourless gas which turns acidified potassium dichromate solution green.

(C) SO32- (III) Brown fumes which turns acidified KI solution containing starch blue.
(D) NO2- (IV) Colourless gas evolved with brisk effervescence, which turns lime water milky.

Choose the correct answer from the options given below

EASY
Match the catalysts to the correct process.
 
  Catalyst   Process
A. TiCl3 i. Wacker process
B. PdCl2 ii. Ziegler – Natta polymerisation
C. CuCl2 iii. Contact process`
D. V2O5 iv. Deacon’s process
EASY
On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is:
HARD
The reagent(s) that can selectively precipitate S2- from a mixture of S2- and SO42- in aqueous solution is (are)
HARD
The equation which is balanced and represents the correct product(s) is
EASY
Reaction of an inorganic sulphite X with dilute H2SO4 generated compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z, Y and X, respectively, are :
MEDIUM
Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produce a
MEDIUM
The pair of metal ions that can give a spin only magnetic moment of 3.9BM for the complex [M(H2O)6]Cl2 , is:
EASY
When treated with conc. HCl, MnO2 yields gas (X) which further reacts with Ca(OH)2 to generate a white solid (Y) reacts with dil. HCl to produce the same gas X. the solid Y is
EASY
The transition elements that has the lowest enthalpy of atomisation is:
MEDIUM
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the before mentioned solution, a white precipitate is obtained which does not dissolve in dilute nitric acid. The anion is:
HARD
Which of the following arrangements does not represent the correct order of the property stated against it?
EASY
The colour and magnetic nature of manganate ion MnO42- is-
HARD
Spin only magnetic moment 2.84BM is given by:

(Atomic Number of Ni=28,Ti=22,Cr=24,Co=27)
HARD
When a mixture of NaCl,K2Cr2O7 and concentrated H2SO4 is heated in a dry test tube, a red vapour X is evolved. This vapour X turns an aqueous solution of NaOH yellow due to the formation of Y. X and Y, respectively, are:
MEDIUM
HgCl2 and I2 both when dissolved in water containing I- ions the pair of species formed is:
MEDIUM
The sodium salt of an organic acid X produces effervescence with concentrated H2SO4. X reacts with the acidified aqueous CaCl2 solution to give a white precipitate which decolourises acidic solution of KMnO4. X is