Recent questions tagged p-block-elements

In the manufacture of sulphuric acid by the contact process , $SO_3$ is not added to water directly to form $H_2SO_4$ because

asked Feb 13, 2017 by meena.p

1 answer

Which of the following allot ropes represents prismatic sulphur?

asked Feb 13, 2017 by meena.p

1 answer

Which of the following statements is not correct ?

asked Feb 13, 2017 by meena.p

1 answer

Which of the following statements is not correct ?

asked Feb 13, 2017 by meena.p

1 answer

For naming the oxo-acids of phosphorus , the prefix 'pyro' is used for

asked Feb 13, 2017 by meena.p

1 answer

Which of the following statement is correct ?

asked Feb 13, 2017 by meena.p

1 answer

An element was burnt in limited supply of oxygen . The oxide (H) was formed which was treated with water to yield an acid (B). The acid (B) was oxidised to give another acid (C). The acid (C) gave yellow precipitate with $AgNO_3$ solution . The oxide (A) is

asked Feb 13, 2017 by meena.p

1 answer

Which of the following statements is wrong ?

asked Feb 13, 2017 by meena.p

1 answer

The first noble gas compound ever synthesized is

asked Feb 10, 2017 by meena.p

1 answer

What is bond angle p-p-p in $P_4$ ?

asked Feb 10, 2017 by meena.p

1 answer

Which one of the following is a tetra basic acid ?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following regarding sulphurous acid is not correct ?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following statement regarding nitrous oxide is not correct ?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following statement regarding nitric oxide is not correct

asked Feb 9, 2017 by meena.p

1 answer

Which of the following statements is correct for $CSBr_3$?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following statement is incorrect about ozone ?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following sets contains oxides in the sequence of basic amphateric and acidic in nature respectively

asked Feb 9, 2017 by meena.p

1 answer

The dissolution of $AgBr$ in $S_2O_3^{-2}$ produces

asked Feb 9, 2017 by meena.p

1 answer

Which of the following compound produces $SO_3$ as the only gas on heating ?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following statements regarding sulphur dioxide is not correct ?

asked Feb 9, 2017 by meena.p

1 answer

Hypo phosphorous acid is

asked Feb 9, 2017 by meena.p

1 answer

Which are of the following acids is a dibasic acid ?

asked Feb 9, 2017 by meena.p

1 answer

With excess of $Cl_2$ ammonia forms

asked Feb 9, 2017 by meena.p

1 answer

Which of the following statement regarding nitric oxide is not correct ?

asked Feb 9, 2017 by meena.p

1 answer

Which of the following acids of nitrogen is a white solid ?

asked Feb 8, 2017 by meena.p

1 answer

Which of the following statement is correct ?

asked Feb 8, 2017 by meena.p

1 answer

Which of the following carbide is a methanide ?

asked Feb 8, 2017 by meena.p

1 answer

Which of the following statement regarding $N_2O_4$ is not correct ?

asked Feb 8, 2017 by meena.p

1 answer

Which one of the following ids purely reducing agent

asked Feb 7, 2017 by meena.p

1 answer

Nitrogen (1) oxide is produced by

asked Feb 7, 2017 by meena.p

1 answer

Sodium thiosulphate is used in photography because of its

asked Feb 7, 2017 by meena.p

1 answer

Aluminium (III) chloride forms a dimer because aluminium

asked Feb 7, 2017 by meena.p

1 answer

The Species that does not contain peroxide ions is

asked Nov 30, 2016 by meena.p

1 answer

There is no S-S bond in

asked Nov 30, 2016 by meena.p

1 answer

Bond energy is highest for

asked Nov 30, 2016 by meena.p

1 answer

Amongst $H_2O,H_2S,H_2Se$ and $H_2T_e$ the one with highest boiling point is

asked Nov 30, 2016 by meena.p

1 answer

Which among the following is peroxic acid of sulphur ? $(i) H_2SO_3 \\ (ii)H_2SO_4 \\ (iii)H_2S_2O_8 \\ (iv)H_2sO_4$

asked Nov 30, 2016 by meena.p

0 answers

The true statement for the acids of phosphorus , $H_3PO_2,H_3PO_3$ and $H_3PO_4$ is

asked Nov 30, 2016 by meena.p

1 answer

The number of S-S bonds is cyclic trimer of sulphur trioxide $(S_3O_3)$ is

asked Nov 30, 2016 by meena.p

1 answer

The correct order of acidic strength is

asked Nov 30, 2016 by meena.p

1 answer

The number of P_O_P linkages in pyrophosphopric acid is

asked Nov 30, 2016 by meena.p

1 answer

Which one of the following oxides is neutral

asked Nov 30, 2016 by meena.p

1 answer

A boy baths in the first shower of rainfall during rainy season and his body gets yellowish brown colour patches on the whole body for which he was medicated. Answer the following questions: (i) Why the skin of the boy got yellowish brown patches. (ii) As a student of chemistry what do you think could be reason and the term you would use to explain it? (iii) Which values are promoted through this activity? (iv) Suggest two activities to promote these values.

asked Nov 28, 2016 by meena.p

1 answer

(i) Are all the five bonds in $PCl_5$ molecules equivalent ? justify your answer. (ii) What happens when $PCl_5$ is heated ?

asked Nov 25, 2016 by meena.p

1 answer

Which of the following does not react with oxygen directly ? why ? $Zn,Ti,Pt,Fe$

asked Nov 24, 2016 by meena.p

1 answer

Why the bond angles is in the following order ? $NH_3=106.5^{\circ} ,\quad\;PH_3=93.5 ^{\circ}, \quad , ASH_3=91.5^{\circ}, \quad ,SbH_3=91.3^{\circ}$

asked Nov 23, 2016 by meena.p

1 answer

Why ICl bonds are weaker than $Cl_2$

asked Nov 23, 2016 by meena.p

1 answer

Complete the following chemical equations : (i) $P_4+SO_2 Cl_2 \to \\ (ii)Fe^{3+}+SO_2+H_2O \to \\ (iii) X_eF_6+H_2 O \to $

asked Nov 22, 2016 by meena.p

1 answer

Give reasons for the following : (i) Nitric oxide become brown when released in air . (ii) Ammonia acts as a ligand.

asked Nov 21, 2016 by meena.p

1 answer

Why $BH^{-} _ {4}$ and $NH_4^{+} $ are isolobal.

asked Nov 17, 2016 by meena.p

1 answer

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