94420 + Interview Questions in Chemistry in Class 12 Page 525 InterviewSolution

26201.	The oxyacid of phosphorous in which phosphorous has the lowest oxidation state is
Answer» HYPOPHOSPHOROUS acid orthopbosphoric acid pyrophosphoric acid metaphosphoric acid Solution :Hypophophorous acid is `H_(3)PO_(2)` in which O.S. of P is `+1`.

Discussion

26202.	The oxoacid of sulphur that contains a lone pair of electrons on sulphur is
Answer» SULPHUROUS ACID sulphuricacid peroxodisulphuric acid, Pyrosulphuric acid Answer :A

Discussion

26203.	The oxoacid of P having oxidation state +4 is :
Answer» PHOSPHOROUS ACID HYPOPHOSPHORIC acid Phosphoricacid METAPHOSPHORIC acid. Answer :B

Discussion

26204.	The oxime of which of the following species wukk exist in syn and anti geometrical forms.
Answer» Benzophenone Benzaldehyde Acetone Diethyl ketone. Solution :ANTI & SYN. FORMS

Discussion

26205.	The oxidtion state of Fe in k_(4)[Fe(CN)_(6)] is………. .
Answer» ANSWER :II

Discussion

26206.	The oxo acid of halogen with maximum acidic character is :
Answer» `HClO_(4)` `HClO_(3)` `HClO_(2)` `HCLO.` ANSWER :A

Discussion

26207.	The oxidizing property of nitric acid is due to:
Answer» its concentration the POSITIVE valency of N its dilution the unstability of its molecule and the PRESENCE of nitrogen in its HIGHEST state of oxidation Answer :D

Discussion

26208.	The oxidising property of H_(2)O_(2) is best explained by assuming that two oxygen atoms in its molecule are bonded
Answer» DIFFERENTLY similarly covalently by hydrogen bonds Solution :It is believed that out of two hydrogens, one is associated with each oxygen atom at a bond ANGLE of `97^(@)`. All the FOUR atoms `H-O-O-H` do not lie in the same plane.

Discussion

26209.	The oxidising property of nitric acid is due to
Answer» its CONCENTRATION the positive valency of N its dilution presence of nitrogen in its highest oxidation state. Solution :`HNO_3` has nitrogen in its highest oxidation i.e., +5 state, due to this it reduces itself by OXIDISING other substances, HENCE is very strong oxidising AGENT.

Discussion

26210.	The oxidising and reducing power of an element is measured in terms of ……
Answer» SOLUTION :STANDARD ELECTRODE POTENTIAL

Discussion

26211.	The oxidising agent used to convert toluene to benzaldehyde is ................
Answer» SOLUTION :`CrO_2Cl_2`CHROMYL CHLORIDE

Discussion

26212.	The oxidising agent used to prepare aldehyde (or) ketone from alcohol, the reagent usedis ………………… .
Answer» acidified `Na_2Cr_2O_7` alkaline `KMnO_4` PYRIDINIUM CHLOROCHROMATE CONC. `H_2SO_4` Solution : Pyridinium chlorochromate

Discussion

26213.	The oxides will decompose on heating even in the absence ofreducing agent is ……..
Answer» `Ag_(2)O` HgO MgO Both (a) and (B) ANSWER :D

Discussion

26214.	The oxides of non - metals are acidic and the oxides of the metals are basic .Would you expect boron to be more basic in its reactions than aluminium?.
Answer» SOLUTION :Being nearer the top of the group, we would EXPECT BORON to show more non-metallic NATURE than aluminium, so, it should be more acidic in nature than aluminium..

Discussion

26215.	The oxides of Ca, Sr and Ba are :
Answer» Basic Acidic Amphoteric Neutral Answer :A

Discussion

26216.	The oxide which shows transition from metal to insulation, i.e., semiconductors are:
Answer» `V_2O_3` `VO_2` `Ti_2O_3` All Answer :D

Discussion

26217.	The oxide which shows metallic conduction:
Answer» `ReO_3` VO `CrO_2` All Answer :D

Discussion

26218.	The oxide which is solid at room temperature is:
Answer» `N_2O` NO `N_2O_4` `N_2O_5` ANSWER :D

Discussion

26219.	The oxide which on strong heating evolves oxygen is :
Answer» `Na_(2)O` `Al_(2)O_(3)` CaO `BaO_(2)` Solution :`2BaO_(2) overset(DELTA) to 2BaO+O_(2)`.

Discussion

26220.	The oxide which is not reduced by hydrogen in
Answer» <P>`Ag_(2)O` `K_(2)O` `Fe_(2)O_(3)` `P_(4)O_(10)` SOLUTION :On the BASIS of electrochemical series `K_(2)O` is not reduced by hydrogen.

Discussion

26221.	The oxide which gives hydrogen peroxide on treatment with dilute acid is
Answer» `PbO_(2)` `Na_(2)O_(2)` `MnO_(2)` `TiO_(2)` Solution :`Na_(2)O_(2)+H_(2)SO_(4)(dil).RARR H_(2)O_(2)+Na_(2)SO_(4)` `PbO_(2),MnO_(2) and TiO_(2)` do not react with dil acids to GIVE HYDROGEN peroxide.

Discussion

26222.	The oxide which gives H_(2)O_(2) with dil. HCl is :
Answer» `PbO_(2)` `Na_(2)O_(2)` `MnO_(2)` `SnO_(2)`. Answer :B

Discussion

26223.	The oxide which cannot act as reducing agent is
Answer» `NO_2` `SO_2` `CO_2` `CIO_2` Solution :(C) CARBON has the MAXIMUM OXIDATION state of +4, therefore carbon dioxide `(CO_2)` cannot act as a REDUCING agent.

Discussion

26224.	The oxide that possesses electrical conductivity:
Answer» `V_2O_5` `CrO_2` NiO MnO Answer :B

Discussion

26225.	The oxide which gives H_(2)O_(2) on treatment with dilute acid is
Answer» `PbO_(2)` `BaO_(2).8H_(2)O` `MnO_(2)` `TiO_(2)` ANSWER :B

Discussion

26226.	The oxide that is insulator is
Answer» VO COO `ReO_(3)` `Ti_(2)O_(3)` Solution :Oxide that is INSULATOR is CoO.

Discussion

26227.	The oxide that is not reduce by hydrogen in the hot is:
Answer» `Ag_2O` `Fe_2O_3` CUO `K_2O` ANSWER :D

Discussion

26228.	The oxide of which metal is most stable to heat:
Answer» K Ag Hg All of these Answer :A

Discussion

26229.	The oxide that does not act as an insulator even by a change in temperature
Answer» `VO_(2)` TIO VO `TiO_(2)` ANSWER :B

Discussion

26230.	The oxide of nitrogen which reacts with NaOH solution giving both sodium nitrite and sodium nitrate is:
Answer» `NO_2` `N_2O_5` `N_2O_3` `NO` ANSWER :A

Discussion

26231.	The oxide that gives H_2O_2 on treatment with a dilute acid is :
Answer» `PbO_2` `MnO_2` `Na_2O_2` `TiO_2` ANSWER :C

Discussion

26232.	The oxide of chlorine which is a mixed anhydride is
Answer» `Cl_(2)O` `Cl_(2)` `Cl_(2)O_(3)` `Cl_(2)O_(7)` Answer :C

Discussion

26233.	The oxide of an element possesses the molecular formula, M_(2)O_(3). If the equivalent mass of the metal is 9, the atomic mas sof the metal will be:
Answer» 27 18 9 4.5 Answer :A

Discussion

26234.	The oxide of nitrogen existing in the solid state at room temperature is
Answer» NO `NO_(2)` `N_(2)O_(3)` `N_(2)O_(5)` ANSWER :4

Discussion

26235.	The oxide of an element whose electronic configuration is 1s^(2)2s^(2)2p^(6)3s^(1) is
Answer» amphoteric basic acidic neutral Solution :The given element is SODIUM, which is an alkali metal and alkali metal OXIDES are STRONGLY basic.

Discussion

26236.	The oxide of an element possesses the formula M_(2)O_(3). If the equivalent weight of the metal is 9, the molecular weight of the oxide will be
Answer» 54 102 120 200 Answer :B

Discussion

26237.	The oxide of an element contains 32.33 per cent of the element and the vapour density of its chloride is 79. Calculate the atomic mass of the element.
Answer» SOLUTION :MASS of the element=32.33parts Mass of oxygen `=(100-32.33)=67.67` parts Equivalent mass of the element`=(32.33)/(67.67)xx8=3.82` Valency of the element `=(2VD)/(E+35.5)=(2xx79)/(3.82+35.5)=4` HENCE, the atomic mass of the element `=3.82xx4=15.28`.

Discussion

26238.	The oxide of a metal contains 60% of the metal. What will be percentage of bromine in the bromide of the metal. If the valency of the metal is the same in both, the oxide and the bromide?
Answer» 0.93 0.87 0.7 0.77 Answer :B

Discussion

26239.	The oxide obtained in the roasting of ironpyrites
Answer» `SO_(2)` `SO_(3)` FEO `SO_(2) and SO_(3)` ANSWER :A

Discussion

26240.	Which is insoluble in water ?
Answer» `TeO_2` `SO_2` `PoO_2` `SeO_2` ANSWER :C

Discussion

26241.	The oxide involved in the formationof brown ring for testing nitrate ion
Answer» `N_(2)O` NO `NO_(2)` `N_(2)O_(3)` ANSWER :2

Discussion

26242.	The oxide formed in the maximum oxidation state is ZrO_(x).x is
Answer» SOLUTION :N//A

Discussion

26243.	The oxide containing chloride in the highest oxidation state is :
Answer» `ClO_(2)` `ClO_(3)` `Cl_(2)O_(7)` `Cl_(2)O`. Solution :In `Cl_(2)O_(7)`, the OXIDATION state of Cl is `+7`.

Discussion

26244.	The oxide bridges through which a large number of monosaccharides are called
Answer» PEPTIDE BOND hydrogen bond NITROGEN bond glycosidic LINKAGE Solution :glycosidic linkage

Discussion

26245.	The oxidation states of V and Br in V(BrO_(2))_(2)are respectively
Answer» 2 and 2 2 and 1 4 and 2 2 and 3. Solution :`V(+2),Br+3" in "(BrO_(2))^(-)" so it EXISTS as "V^(II)(Br^(III)O_(2))_(2)`

Discussion

26246.	The oxidation states of the most electronegative element in the products of the reaction betweeen BaO_(2) with dil H_(2)SO_(4) are
Answer» `-1` `+1` `-2` 0 Solution :`BaO_(2)+H_(2)SO_(4)rarrBaSO_(4)+H_(2)O_(2)` Most electronegative element in products is oxygen. In `H_(2)O_(2)` oxidation state of O is `-1` and in `BaSO_(4), -2`.

Discussion

26247.	The oxidation states of the metal atoms in [Fe(CO)_(5)] and Na[Co(CO)_(4)] complexesare respectively :
Answer» 5 and 4 0 and +3 `+3` and `+4` 0 and -1. ANSWER :D

Discussion

26248.	The oxidation states of sulphur in the anions SO_(3)^(2-)S_(2),O_(4)^(2-) and S_2 O_(6)^(2-)follow the order
Answer» `S_2 O_(4)^(2-)ltSO_(3)^(2-) lt S_2 O_(6)^(2-)` `SO_(3)^(2-)ltS_2 O_(4)^(2-) lt S_2 O_(6)^(2-)` `S_2 O_(4)^(2-)ltSO_(6)^(2-) lt S_2 O_(3)^(2-)` `S_2 O_(6 )^(2-)ltS_2 O_(6)^(2-) lt S O_(3)^(2-)` Solution :`OVERSET(x-2)((SO_3 )^(2-)) ,x-6=-2 ,x=+4` ` overset(x-2)((S_2O_4 )^(2-), 2x - 8 =- 2, x= +3 ` ` overset(x-2) (S_2 O_(6))^(2-) .2x - 12 =-2, x = +5`

Discussion

26249.	The oxidation states of S atoms in S_(4)O_(6)^(2-) from left to right respectively are {:("OO"),("\|\|\|\|"),(O^(-)-S-S-S-S-O^(-)),("\|\|\|\|"),("OO"):}
Answer» `+6, 0, 0, +6` `+3, +1, +1, +3` `+5, 0, 0, +5` `+4, +1, +1, +4` Solution :LEFT S atom : +2 each from `=O+4` `+1` from `- O^(-)""+1` 0 from `-S""0/(+5)`

Discussion

26250.	The oxidation states of sulphur in the anions SO_(3)^(-2),S_(2)O_(4)^(2-)andS_(2)O_(6)^(2-)follow the order :
Answer» `S_(2)O_(4)^(2-)ltSO_(3)^(2-)ltS_(2)O_(6)^(2-)` `SO_(3)^(2-)ltS_(2)O_(4)^(2-)ltS_(2)O_(6)^(2-)` `S_(2)O_(4)^(2-)ltS_(2)O_(6)^(2-)ltSO_(3)^(2-)` `S_(2)O_(6)^(2-)ltS_(2)O_(4)^(2-)ltSO_(3)^(2-)` Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

The oxyacid of phosphorous in which phosphorous has the lowest oxidation state is

The oxoacid of sulphur that contains a lone pair of electrons on sulphur is

The oxoacid of P having oxidation state +4 is :

The oxime of which of the following species wukk exist in syn and anti geometrical forms.

The oxidtion state of Fe in k_(4)[Fe(CN)_(6)] is………. .

The oxo acid of halogen with maximum acidic character is :

The oxidizing property of nitric acid is due to:

The oxidising property of H_(2)O_(2) is best explained by assuming that two oxygen atoms in its molecule are bonded

The oxidising property of nitric acid is due to

The oxidising and reducing power of an element is measured in terms of ……

The oxidising agent used to convert toluene to benzaldehyde is ................

The oxidising agent used to prepare aldehyde (or) ketone from alcohol, the reagent usedis ………………… .

The oxides will decompose on heating even in the absence ofreducing agent is ……..

The oxides of non - metals are acidic and the oxides of the metals are basic .Would you expect boron to be more basic in its reactions than aluminium?.

The oxides of Ca, Sr and Ba are :

The oxide which shows transition from metal to insulation, i.e., semiconductors are:

The oxide which shows metallic conduction:

The oxide which is solid at room temperature is:

The oxide which on strong heating evolves oxygen is :

The oxide which is not reduced by hydrogen in

The oxide which gives hydrogen peroxide on treatment with dilute acid is

The oxide which gives H_(2)O_(2) with dil. HCl is :

The oxide which cannot act as reducing agent is

The oxide that possesses electrical conductivity:

The oxide which gives H_(2)O_(2) on treatment with dilute acid is

The oxide that is insulator is

The oxide that is not reduce by hydrogen in the hot is:

The oxide of which metal is most stable to heat:

The oxide that does not act as an insulator even by a change in temperature

The oxide of nitrogen which reacts with NaOH solution giving both sodium nitrite and sodium nitrate is:

The oxide that gives H_2O_2 on treatment with a dilute acid is :

The oxide of chlorine which is a mixed anhydride is

The oxide of an element possesses the molecular formula, M_(2)O_(3). If the equivalent mass of the metal is 9, the atomic mas sof the metal will be:

The oxide of nitrogen existing in the solid state at room temperature is

The oxide of an element whose electronic configuration is 1s^(2)2s^(2)2p^(6)3s^(1) is

The oxide of an element possesses the formula M_(2)O_(3). If the equivalent weight of the metal is 9, the molecular weight of the oxide will be

The oxide of an element contains 32.33 per cent of the element and the vapour density of its chloride is 79. Calculate the atomic mass of the element.

The oxide of a metal contains 60% of the metal. What will be percentage of bromine in the bromide of the metal. If the valency of the metal is the same in both, the oxide and the bromide?

The oxide obtained in the roasting of ironpyrites

Which is insoluble in water ?

The oxide involved in the formationof brown ring for testing nitrate ion

The oxide formed in the maximum oxidation state is ZrO_(x).x is

The oxide containing chloride in the highest oxidation state is :

The oxide bridges through which a large number of monosaccharides are called

The oxidation states of V and Br in V(BrO_(2))_(2)are respectively

The oxidation states of the most electronegative element in the products of the reaction betweeen BaO_(2) with dil H_(2)SO_(4) are

The oxidation states of the metal atoms in [Fe(CO)_(5)] and Na[Co(CO)_(4)] complexesare respectively :

The oxidation states of sulphur in the anions SO_(3)^(2-)S_(2),O_(4)^(2-) and S_2 O_(6)^(2-)follow the order

The oxidation states of S atoms in S_(4)O_(6)^(2-) from left to right respectively are {:("OO"),("||||"),(O^(-)-S-S-S-S-O^(-)),("||||"),("OO"):}

The oxidation states of sulphur in the anions SO_(3)^(-2),S_(2)O_(4)^(2-)andS_(2)O_(6)^(2-)follow the order :