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Inert pair effect of p-block elements is due to the
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Due to the presence of inner lying d and f electrons oxidation state which is 2 unit less than the group oxidation state become popular.
The elements of group 14 are slightly more electronegative than group 13 elements because of
As we move along the period electronegativity increases due to increase in nuclear charge.
In which of the following compounds, nitrogen exhibits highest oxidation state?
The function of Fe (OH)3 in the contact process is
Fe (OH)3 is used to remove arsenic impurities.
In general, nonmetals as compared to metals have
Non metals have high value of ionization energy while metals have comparatively low value of ionization energy.
Among the following which is the strongest oxidizing agent?
F2 is very strong oxidizing agent.
The compounds formed by highly reactive non-metals with highly reactive metals are generally
Compunds formed by highly reactive non metals and metals is ionic bond.
A compound X, of boron reacts with NH3 on heating to give another compound. Y which is called inorganic benzene. The compound X can be prepared by treating BF3 with Lithium aluminium hydride. The compounds X and Y are represented by the formulas.
BF3 reacts with LiAlH4 to form B2H6 which reacts with NH3NH3 in 1:2 ratio forming B3N3H6( Borazine , inorganic benzene
Three reactions involving are given below
B.
C.
In which of the above does act as an acid?
in B only is losing its proton therefore act as acid.
When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from
The correct answer is option DThe reaction of chlorine gas with hot and concentrated sodium hydroxide solution is3Cl2 + 6NaOH⟶NaClO3+ 5NaCl+3H2OOxidation number of Cl is 0 in Cl2, −1 in NaCl and +5 in NaClO3So the oxidation number of chlorine changes from Zero to -1 and Zero to +5.
As we move from B to Al in the p-block elements the sum of the first three ionisation enthalpies
On moving from B to Al size increases so sum of ionization energies also decreases.
The non-metal oxides are:
nonmetallic oxides are either neutral or acidic. Example CO is neutral while CO2 is acidic.
Dry ice is
Dry ice is solid CO2
The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence:
because in BF3 there is backbonding which decreases its acidity. And as we for from BF3 to BBr3 tendency of back bonding decreases so acidity increases,.
Of the following compounds the most acidic is
More is the oxidation number greater is the acidity of oxide
Boron forms only covalent compounds and not +3 ions because
Due to smaller size and high nuclear charge B has very high ionization energy value so doesnot show +3 oxidation state
The element having the noble gas plus 14 f- electrons plus 10 d-electron cores
Tl have bole gas + 14 f +10 d electrons.
In trivalent state, for example, the trichlorides, being covalent are hydrolysed in water form
trihalides hydrolysis to form tetrahedral structure
Which of the following statements regarding ozone is not correct?
Bond order of O-O bond in ozone is less than that in oxygen.Due to resonance the bond order in ozone is 1.5, hence O---O bond length in O3 is greater than O---O bond length in O2.
XeF2 is isostructural with
The correct answer is option D
XeF2 is isostructural with ICl2−.Both contain the same number of lone pairs and bond pairs on the central atom.There are 3 lone pairs and 2 bond pairs.This results in linear geometry.
Aqueous solution of Na2S2O3 on reaction with Cl2 gives
Aqueous Na2S2O3 on reaction with Cl2Cl2 produces NaHSO4
Which noble gas is most abundant in atmosphere?
Argon
Argon is most abundant in composition of air percent by volume. It is in 0.934% in composition of air and is one of the major gas in the Earth's atmosphere.
Aqueous solution of Na2S2O3 on reaction with Cl2Cl2 gives
One of the following p-block elements has unusually low melting point
Ga has very low melting point.
In the manufacture of sulphuric acid by contact process Tyndall box is used to
In the manufacture of sulphuric acid by contact process, Tyndall box is used to. remove impurities. Solution : Tyndall box is for testing the presence of dust particles.
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