Hot concentrated sulphuric acid is a moderately strong oxidising agent. Which of the following reaction doe not show oxidising behaviour?

Among the following, which one is a wrong statement?

 Copper upon heating with conc. HNO₃ produces -

Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.

Column I     Column II
A. XeF₆        1. Distorted octahedral
B. XeO₃       2. Square planar
C. XeOF₄     3. Pyramidal
D. XeF₄       4. Square pyramidal

Codes
A B C D

The correct statement among the following regarding acids is -

The product obtained as a result of a reaction of nitrogen with CaC₂ is:

Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is

shown by one of these compounds. but not by the other?

The maximum bond angle at nitrogen is present in which of the following?

Which of the statements given below is incorrect?

The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr >

HCl. What explains the higher boiling point of hydrogen fluoride?

molecule

Strong reducing behaviour of H₃PO2 is due to -

Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is

When Cl₂ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation

number of chlorine changes from

1. zero to +1 and zero to -5

Among the following which is the strongest oxidising agent ?

The reaction of hydrogen and iodine monochloride is given as :

H₂(g)+ 2ICl(g) $\to$ 2HCl(g)+ I₂(g)

This reaction is of first order with respect to H₂(g) and 2ICl(g) following mechanisms were proposed:

Mechanism A:

H₂(g)+ 2ICl(g) $\to$ 2HCl(g)+ I₂(g)

Mechanism B :

H₂(g)+ ICl(g) $\to$HCl(g)+ HI(g) ; slow

HI(g)+ ICl(g) $\to$ HClCg) + I2(g); fast

Which of the above mechanism (s) can be consistent with the given information about the reaction ?

(a) B only

(b) A and B both

(c) Neither A nor B

(d) A only

For which element would $X{H}_3$ be a stable species :

Physical property of hydride of group 16 that decreases down the group is -

The incorrect statement among the following regarding acidic strength is -

Concentrated nitric acid reacts with iodine to give :

Thermally most stable compound is :

Which of the following halogen oxide  is used for estimation of carbon monoxide in automobile exhaust gases?

The number of S=O bonds present in H₂S₂O₈ is -

Two oxides of nitrogen, $\mathrm{NO}$ and ${\mathrm{NO}}_2$ are allowed to react together at $243° \mathrm{K}$ and form a coloured compound of nitrogen (X). When compound (X) reacts with water to yield another compound of nitrogen (Y). The shape of the anion of (Y) molecule is :

(a) triangular planar                              (b) triangle pyramidal

(c) tetrahedron                                      (d) square planar 

Consider the following sequence of reaction.

$\mathrm{Na}+{\mathrm{NH}}_3\left(\mathrm{g}\right)\underset{}{\to }\left[\mathrm{X}\right]\stackrel{{\mathrm{N}}_2\mathrm{O}}{\to }\left[\mathrm{Y}\right]\stackrel{\mathrm{Heat}}{\to }\underset{\mathrm{Gas} \mathrm{Pure}}{\left[\mathrm{Z}\right]}$

Identify [Z] gas :

$\left(\mathrm{a}\right) {\mathrm{N}}_2$

$\left(\mathrm{b}\right) {\mathrm{NH}}_3$

$\left(\mathrm{c}\right) {\mathrm{O}}_2$

$\left(\mathrm{d}\right) {\mathrm{H}}_2$

The correct statement among the following is -

Which of the following on heating produces ${\mathrm{NO}}_2$?

(a) ${\mathrm{NaNO}}_3$                               (b) ${\mathrm{AgNO}}_3$

(c) ${\mathrm{NH}}_4{\mathrm{NO}}_3$                              (d) ${\mathrm{NH}}_4{\mathrm{NO}}_2$

$$\begin{gathered} \mathrm{A}+{\mathrm{H}}_2\mathrm{O}\stackrel{}{\to }\mathrm{B}+\mathrm{HCl} \\ \mathrm{B}+{\mathrm{H}}_2\mathrm{O}\stackrel{}{\to }\mathrm{C}+\mathrm{HCl} \end{gathered}$$

Compound (A),(B) and (C) will be respectively :

(a) ${\mathrm{PCl}}_5, {\mathrm{POCl}}_3, {\mathrm{H}}_3{\mathrm{PO}}_3$                 (b) ${\mathrm{PCl}}_5, {\mathrm{POCl}}_3, {\mathrm{H}}_3{\mathrm{PO}}_4$

(c) ${\mathrm{SOCl}}_2, {\mathrm{POCl}}_3, {\mathrm{H}}_3{\mathrm{PO}}_3$               (d) ${\mathrm{PCl}}_3, {\mathrm{POCl}}_3, {\mathrm{H}}_3{\mathrm{PO}}_4$

The correct sequence among the following is -

[For the correct order mark (T) and for the incorrect order mark (F)] :

(a)  Lewis acidity order : ${\mathrm{SiF}}_4<{\mathrm{SiCl}}_4<{\mathrm{SiBr}}_4<{\mathrm{SiI}}_4$ 

(b) Melting point : ${\mathrm{NH}}_3>{\mathrm{SbH}}_3>{\mathrm{AsH}}_3>{\mathrm{PH}}_3$

(c) Boiling point : ${\mathrm{NH}}_3>{\mathrm{SbH}}_3>{\mathrm{AsH}}_3>{\mathrm{PH}}_3$

(d) Dipole moment order : ${\mathrm{NH}}_3>{\mathrm{SbH}}_3>{\mathrm{AsH}}_3>{\mathrm{PH}}_3$

The incorrect statement among the following regarding ${\mathrm{PH}}_3$ is :

Which of the following compound does not produce oxyacid of central atom on hydrolysis?