11242 + Mcqs in Chemistry Page 211 McqOptions

10501.	When 2g of non-volatile hydrocarbon containing 94.4 percent carbon is dissolved in 100g benzene, the vapour pressure of Benzene is lowered from 74.66 torr to 74.01 torr. Determine the molecular formula of the hydrocarbon.
A.	\[{{C}_{6}}{{H}_{6}}\]
B.	\[{{C}_{12}}{{H}_{6}}\]
C.	\[{{C}_{7}}{{H}_{8}}\]
D.	\[{{C}_{14}}{{H}_{10}}\]
Answer» E.

Discussion

10502.	The relationship between osmotic pressure at \[273\,K\] when \[10g\] glucose \[({{P}_{1}}),\,10g\] urea \[({{P}_{2}})\] and \[10g\] sucrose \[({{P}_{3}})\] are dissolved in \[250ml\] of water is [CBSE PMT 1996]
A.	\[{{P}_{1}}>{{P}_{2}}>{{P}_{3}}\]
B.	\[{{P}_{3}}>{{P}_{1}}>{{P}_{2}}\]
C.	\[{{P}_{2}}>{{P}_{1}}>{{P}_{3}}\]
D.	\[{{P}_{2}}>{{P}_{3}}>{{P}_{1}}\]
Answer» D. \[{{P}_{2}}>{{P}_{3}}>{{P}_{1}}\]

Discussion

10503.	Osmotic pressure of a urea solution at \[{{10}^{o}}C\] is \[500\,\,mm.\] Osmotic pressure of the solution become 105.3 mm. When it is diluted and temperature raised to \[{{25}^{o}}C.\] The extent of dilution is [MP PET 2004]
A.	6 Times
B.	5 Times
C.	7 Times
D.	4 Times
Answer» C. 7 Times

Discussion

10504.	The osmotic pressure of a dilute solution is directly proportional to the [MP PMT 1987]
A.	Diffusion rate of the solute
B.	Ionic concentration
C.	Elevation of B.P.
D.	Flow of solvent from a concentrated to a dilute solution
Answer» C. Elevation of B.P.

Discussion

10505.	The osmotic pressure of solution increases, if [CPMT 1985, 87, 91]
A.	Temperature is decreased
B.	Solution concentration is increased
C.	Number of solute molecules is increased
D.	Volume is increased
Answer» D. Volume is increased

Discussion

10506.	What would happen if a thin slice of sugar beet is placed in a concentrated solution of \[NaCl\] [CMC Vellore 1986]
A.	Sugar beet will lose water from its cells
B.	Sugar beet will absorb water from solution
C.	Sugar beet will neither absorb nor lose water
D.	Sugar beet will dissolve in solution
Answer» B. Sugar beet will absorb water from solution

Discussion

10507.	The osmotic pressure of \[1\,m\] solution at \[{{27}^{o}}C\] is [CPMT 1999]
A.	2.46 atm
B.	24.6 atm
C.	1.21 atm
D.	12.1 atm
Answer» C. 1.21 atm

Discussion

10508.	The concentration in gms per litre of a solution of cane sugar \[(M=342)\] which is isotonic with a solution containing \[6\,gms\] of urea \[(M=60)\] per litre is [Orissa PMT 1989]
A.	3.42
B.	34.2
C.	5.7
D.	19
Answer» C. 5.7

Discussion

10509.	The osmotic pressure of 0.4% urea solution is 1.66 atm and. that of a solution of suger of 3.42 % is 2.46 atm. When both the solution are mixed then the osmotic pressure of the resultant solution will be [MP PMT 1985]
A.	1.64 atm
B.	2.46 atm
C.	2.06 atm
D.	0.82 atm
Answer» D. 0.82 atm

Discussion

10510.	Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greater precision [Kerala PMT 2004]
A.	Relative lowering of vapour pressure
B.	Elevation of boiling point
C.	Depression in freezing point
D.	Osmotic pressure
Answer» E.

Discussion

10511.	What mass of non-volatile solute (urea) needs to be dissolved in 150 g of water in order to decrease the vapour pressure of water by 35%. What will be the molality of solution?
A.	23.88
B.	31.12
C.	25.47
D.	29.92
Answer» E.

Discussion

10512.	The elevation in boiling point of a solution of 13.44 g of\[CuC{{l}_{2}}\], (molecular weight = 134.4, \[{{K}_{b}}\] = 0.52 K \[molalit{{y}^{-1}}\] in 1 kg water using the given information will be
A.	0.16
B.	0.05
C.	0.1
D.	0.2
Answer» B. 0.05

Discussion

10513.	The boiling point elevation constant for benzene is \[2.57{}^\circ C/m.\] The boiling point of benzene is \[81{}^\circ C\]. Determine the boiling point of solution formed when 10 g of \[{{C}_{4}}{{H}_{12}}\]is dissolved in 20 g benzene.
A.	71.46
B.	7.14
C.	85.76
D.	88.14
Answer» E.

Discussion

10514.	A 5 molar solution of \[{{H}_{2}}S{{O}_{4}}\] is diluted from 1 litre to 10 litres. What is the normality of the solution [AFMC 2005]
A.	0.25 N
B.	1 N
C.	2 N
D.	7 N
Answer» B. 1 N

Discussion

10515.	An aqueous solution of glucose is 10% in strength. The volume in which \[1gm\] mole of it is dissolved will be [AIIMS 1992; Pb. CET 2004]
A.	18 litre
B.	9 litre
C.	0.9 litre
D.	1.8 litre
Answer» E.

Discussion

10516.	Volume of water needed to mix with 10 ml 10N \[HN{{O}_{3}}\] to get 0.1 N \[HN{{O}_{3}}\] [UPSEAT 2003]
A.	1000 ml
B.	990 ml
C.	1010 ml
D.	10 ml
Answer» C. 1010 ml

Discussion

10517.	10 grams of a solute is dissolved in 90 grams of a solvent. Its mass percent in solution is
A.	0.01
B.	11.1
C.	10
D.	9
Answer» D. 9

Discussion

10518.	Which of the following concentration factor is affected by change in temperature [DCE 2002]
A.	Molarity
B.	Molality
C.	Mole fraction
D.	Weight fraction
Answer» B. Molality

Discussion

10519.	0.5 M of \[{{H}_{2}}S{{O}_{4}}\] is diluted from 1 litre to 10 litre, normality of resulting solution is [AFMC 2005]
A.	1 N
B.	0.1 N
C.	10 N
D.	11 N
Answer» C. 10 N

Discussion

10520.	20 g of hydrogen is present in 5 litre vessel. The molar concentration of hydrogen is [DPMT 2000]
A.	4
B.	1
C.	3
D.	2
Answer» E.

Discussion

10521.	\[9.8g\] of \[{{H}_{2}}S{{O}_{4}}\] is present in 2 litres of a solution. The molarity of the solution is [EAMCET 1991; MP PMT 2002]
A.	\[0.1M\]
B.	\[0.05M\]
C.	\[0.2M\]
D.	\[0.01M\]
Answer» C. \[0.2M\]

Discussion

10522.	Normality \[(N)\] of a solution is equal to
A.	\[\frac{\text{No}\text{. of moles of solute}}{\text{Volume of solution in litre}}\]
B.	\[\frac{\text{No}\text{. of gram equivalent of solute}}{\text{Volume of solution in litre }}\]
C.	\[\frac{\text{No}\text{. of moles of solute}}{\text{Mass of solvent in kg}}\]
D.	None of these
Answer» C. \[\frac{\text{No}\text{. of moles of solute}}{\text{Mass of solvent in kg}}\]

Discussion

10523.	Molarity of \[0.2N\,{{H}_{2}}S{{O}_{4}}\] is [KCET 2005]
A.	0.2
B.	0.4
C.	0.6
D.	0.1
Answer» E.

Discussion

10524.	A solution of \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\,\{d=1.253\,gm/ml\}\]contain 22% salt by weight. The molarity, normality and molality of the solution is [MP PET 2004]
A.	0.805 M, 4.83 N, 0.825 M
B.	0.825 M, 48.3 N, 0.805 M
C.	4.83 M, 4.83 N, 4.83 M
D.	None
Answer» B. 0.825 M, 48.3 N, 0.805 M

Discussion

10525.	The normality of a solution of sodium hydroxide 100 ml of which contains 4 grams of \[NaOH\] is [CMC Vellore 1991]
A.	0.1
B.	40
C.	1
D.	0.4
Answer» D. 0.4

Discussion

10526.	The number of moles present in 2 litre of 0.5 M \[NaOH\] is [MH CET 2001]
A.	0.5
B.	0.1
C.	1
D.	2
Answer» D. 2

Discussion

10527.	What is the volume of \[0.1\,N\,HCl\] required to react completely with \[1.0g\] of pure calcium carbonate \[(Ca=40,\,C=12\] and \[O=16)\] [KCET 1998]
A.	\[150\,c{{m}^{3}}\]
B.	\[250\,c{{m}^{3}}\]
C.	\[200\,c{{m}^{3}}\]
D.	\[100\,c{{m}^{3}}\]
Answer» D. \[100\,c{{m}^{3}}\]

Discussion

10528.	Which one of the following is an extensive property [KCET 1998]
A.	Molar volume
B.	Molarity
C.	Number of moles
D.	Mole fraction
Answer» D. Mole fraction

Discussion

10529.	Molecular weight of urea is 60. A solution of urea containing \[6g\] urea in one litre is [BHU 1996, 99]
A.	1 molar
B.	1.5 molar
C.	0.1 molar
D.	0.01 molar
Answer» D. 0.01 molar

Discussion

10530.	A certain aqueous solution of \[FeC{{l}_{3}}\] (formula mass =162) has a density of \[1.1\,g/ml\] and contains \[20.0%\,FeC{{l}_{3}}\]. Molar concentration of this solution is [Pb. PMT 1998]
A.	0.028
B.	0.163
C.	1.27
D.	1.47
Answer» D. 1.47

Discussion

10531.	The normality of 10 lit. volume hydrogen peroxide is [Kerala CET (Med.) 2003]
A.	0.176
B.	3.52
C.	1.78
D.	0.88
Answer» D. 0.88

Discussion

10532.	Normality of \[2M\] sulphuric acid is [AIIMS 1991, 92; Pb. CET 2002]
A.	\[2N\]
B.	\[4N\]
C.	\[N/2\]
D.	\[N/4\]
Answer» C. \[N/2\]

Discussion

10533.	When \[7.1gm\,N{{a}_{2}}S{{O}_{4}}\] (molecular mass 142) dissolves in \[100\,ml\,{{H}_{2}}O\], the molarity of the solution is [CBSE PMT 1991; MP PET 1993, 95]
A.	2.0 M
B.	1.0 M
C.	0.5 M
D.	0.05 M
Answer» D. 0.05 M

Discussion

10534.	\[25\,ml\] Of \[3.0\,M\,HN{{O}_{3}}\] are mixed with \[75\,ml\] of\[4.0\,M\,HN{{O}_{3}}\]. If the volumes are additive, the molarity of the final mixture would be [DPMT 1986; MH CET 2001]
A.	\[3.25\,M\]
B.	\[4.0\,M\]
C.	\[3.75\,M\]
D.	\[3.50M\]
Answer» D. \[3.50M\]

Discussion

10535.	If two substances \[A\] and \[B\] have \[P_{A}^{0}:\,P_{B}^{0}=1\,:\,2\] and have mole fraction in solution 1 : 2 then mole fraction of \[A\] in vapours [DPMT 2005]
A.	0.33
B.	0.25
C.	0.52
D.	0.2
Answer» E.

Discussion

10536.	The freezing point of one molal \[NaCl\] solution assuming \[NaCl\] to be 100% dissociated in water is (molal depression constant = 1.86) [CPMT 1985; BHU 1981; MP PMT 1997; UPSEAT 2001]
A.	\[-{{1.86}^{o}}C\]
B.	\[-{{3.72}^{o}}C\]
C.	\[+{{1.86}^{o}}C\]
D.	\[+{{3.72}^{o}}C\]
Answer» C. \[+{{1.86}^{o}}C\]

Discussion

10537.	The vapour pressure of two liquids P and Q are 80 and 600 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be [CBSE PMT 2005]
A.	140 torr
B.	20 torr
C.	68 torr
D.	72 torr
Answer» E.

Discussion

10538.	The elevation in boiling point of a solution of 13.44g of CuCl2 in 1kg of water using the following information will be (Molecular weight of CuCl2 = 134.4 and Kb = 0.52 K molal-1) [IIT 2005]
A.	0.16
B.	0.05
C.	0.1
D.	0.2
Answer» B. 0.05

Discussion

10539.	For decolourization of 1 mole of \[KMn{{O}_{4}}\], the moles of \[{{H}_{2}}{{O}_{2}}\] required is [AIIMS 2004]
A.	1/2
B.	3/2
C.	5/2
D.	7/2
Answer» D. 7/2

Discussion

10540.	Oxidation number of Fe in \[{{[Fe{{(CN)}_{6}}]}^{-3}},\]\[{{[Fe{{(CN)}_{6}}]}^{-4}},\,{{[Fe(SCN)]}^{+2}}\] and \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{+3}}\] respectively would be-
A.	+3, +2, +3 and +3
B.	+3, +3, +3 and +3
C.	+3, +2, +2 and +2
D.	+2, +2, +2 and +2
Answer» B. +3, +3, +3 and +3

Discussion

10541.	What will be the oxidation number of I in the \[K{{I}_{3}}\]?
A.	\[-\frac{1}{3}\]
B.	\[-\frac{1}{4}\]
C.	4
D.	3
Answer» B. \[-\frac{1}{4}\]

Discussion

10542.	The order of increasing O.N. of S in \[{{S}_{8}},\,{{S}_{2}},\,O_{8}^{-2},\,{{S}_{2}}_{3}^{-2}\] is:
A.	\[{{S}_{8}}<{{S}_{2}}O_{8}^{-2}<{{S}_{2}}O_{3}^{-2}<{{S}_{4}}O_{6}^{-2}\]
B.	\[{{S}_{2}}O_{8}^{-2}<{{S}_{2}}O_{3}^{-2}<{{S}_{4}}O_{6}^{-2}<{{S}_{8}}\]
C.	\[{{S}_{2}}O_{8}^{-2}<{{S}_{8}}<{{S}_{4}}O_{6}^{-2}<{{S}_{2}}O_{3}^{-2}\]
D.	\[{{S}_{8}}<{{S}_{2}}O_{3}^{-2}<{{S}_{4}}O_{6}^{-2}<{{S}_{2}}O_{8}^{-2}\]
Answer» E.

Discussion

10543.	\[Mn{{O}_{4}}^{2-}\] undergoes disproportionation reaction in acidic medium but \[Mn{{O}_{4}}^{-}\] does not because
A.	In \[Mn{{O}_{4}}^{2-}Mn\] is in intermediate oxidation state
B.	In \[Mn{{O}_{4}}^{2-},Mn\] is in lowest oxidation state
C.	In \[Mn{{O}_{4}}^{2-},Mn\] is in intermediate oxidation state
D.	None of the above
Answer» B. In \[Mn{{O}_{4}}^{2-},Mn\] is in lowest oxidation state

Discussion

10544.	Oxidation states of the metal in the minerals hematite and magnetite, respectively, are
A.	II, III in hematite and II in magnetite
B.	II, III in hematite and II in magnetite
C.	II in hematite and II, II in magnetite
D.	III in hematite and II, III in magnetite
Answer» E.

Discussion

10545.	What will be the value of x, y and z in the following equation \[{{H}_{2}}{{C}_{2}}{{O}_{4}}+x{{H}_{2}}{{O}_{2}}\xrightarrow[{}]{{}}\]\[yC{{O}_{2}}+z{{H}_{2}}O\]
A.	2, 1, 2
B.	1, 2, 2
C.	2, 2, 1
D.	None of these
Answer» C. 2, 2, 1

Discussion

10546.	Which of the following reaction involves neither oxidation nor reduction
A.	\[CrO_{4}^{2-}\to C{{r}_{2}}O_{7}^{2-}\]
B.	\[Cr\to CrC{{l}_{3}}\]
C.	\[Na\to N{{a}^{+}}\]
D.	\[2{{S}_{2}}O_{3}^{2-}\to {{S}_{4}}O_{6}^{2-}\]
Answer» B. \[Cr\to CrC{{l}_{3}}\]

Discussion

10547.	One mole of \[{{X}_{2}}{{H}_{4}}\] releases 10 moles of electrons to form a compound y. What should be the oxidation number of x in the compound y.
A.	3
B.	-3
C.	-6
D.	1
Answer» B. -3

Discussion

10548.	What are the oxidation numbers of carbon in HCN, CO, HNC, respectively?
A.	3, 3, 3
B.	3, 2, -3
C.	2, 2, 2
D.	3, 2, 2
Answer» D. 3, 2, 2

Discussion

10549.	On the basis of structure, the two sulphur atoms in \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] have
A.	+ 2 and + 4 oxidation states
B.	- 2 and + 6 oxidation states
C.	+ 4 and + 6 oxidation states
D.	same oxidation state of two sulphur atoms
Answer» C. + 4 and + 6 oxidation states

Discussion

10550.	In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent?
A.	\[2MnO_{3}^{2-}+6{{H}^{+}}+5{{H}_{2}}O\xrightarrow[{}]{{}}\]\[2M{{n}^{2+}}+8{{H}_{2}}O+5{{O}_{2}}\]
B.	\[{{l}_{2}}+{{H}_{2}}{{O}_{2}}+2O{{H}^{+}}\xrightarrow{{}}2{{l}^{-}}+2{{H}_{2}}O+{{O}_{2}}\]
C.	\[2MnO_{4}^{-}+3{{H}_{2}}{{O}_{2}}\xrightarrow{{}}2Mn{{O}_{2}}+3{{O}_{2}}+2{{H}_{2}}O\]
D.	All of these
Answer» C. \[2MnO_{4}^{-}+3{{H}_{2}}{{O}_{2}}\xrightarrow{{}}2Mn{{O}_{2}}+3{{O}_{2}}+2{{H}_{2}}O\]

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

When 2g of non-volatile hydrocarbon containing 94.4 percent carbon is dissolved in 100g benzene, the vapour pressure of Benzene is lowered from 74.66 torr to 74.01 torr. Determine the molecular formula of the hydrocarbon.

The relationship between osmotic pressure at \[273\,K\] when \[10g\] glucose \[({{P}_{1}}),\,10g\] urea \[({{P}_{2}})\] and \[10g\] sucrose \[({{P}_{3}})\] are dissolved in \[250ml\] of water is [CBSE PMT 1996]

Osmotic pressure of a urea solution at \[{{10}^{o}}C\] is \[500\,\,mm.\] Osmotic pressure of the solution become 105.3 mm. When it is diluted and temperature raised to \[{{25}^{o}}C.\] The extent of dilution is [MP PET 2004]

The osmotic pressure of a dilute solution is directly proportional to the [MP PMT 1987]

The osmotic pressure of solution increases, if [CPMT 1985, 87, 91]

What would happen if a thin slice of sugar beet is placed in a concentrated solution of \[NaCl\] [CMC Vellore 1986]

The osmotic pressure of \[1\,m\] solution at \[{{27}^{o}}C\] is [CPMT 1999]

The concentration in gms per litre of a solution of cane sugar \[(M=342)\] which is isotonic with a solution containing \[6\,gms\] of urea \[(M=60)\] per litre is [Orissa PMT 1989]

The osmotic pressure of 0.4% urea solution is 1.66 atm and. that of a solution of suger of 3.42 % is 2.46 atm. When both the solution are mixed then the osmotic pressure of the resultant solution will be [MP PMT 1985]

Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greater precision [Kerala PMT 2004]

What mass of non-volatile solute (urea) needs to be dissolved in 150 g of water in order to decrease the vapour pressure of water by 35%. What will be the molality of solution?

The elevation in boiling point of a solution of 13.44 g of\[CuC{{l}_{2}}\], (molecular weight = 134.4, \[{{K}_{b}}\] = 0.52 K \[molalit{{y}^{-1}}\] in 1 kg water using the given information will be

The boiling point elevation constant for benzene is \[2.57{}^\circ C/m.\] The boiling point of benzene is \[81{}^\circ C\]. Determine the boiling point of solution formed when 10 g of \[{{C}_{4}}{{H}_{12}}\]is dissolved in 20 g benzene.

A 5 molar solution of \[{{H}_{2}}S{{O}_{4}}\] is diluted from 1 litre to 10 litres. What is the normality of the solution [AFMC 2005]

An aqueous solution of glucose is 10% in strength. The volume in which \[1gm\] mole of it is dissolved will be [AIIMS 1992; Pb. CET 2004]

Volume of water needed to mix with 10 ml 10N \[HN{{O}_{3}}\] to get 0.1 N \[HN{{O}_{3}}\] [UPSEAT 2003]

10 grams of a solute is dissolved in 90 grams of a solvent. Its mass percent in solution is

Which of the following concentration factor is affected by change in temperature [DCE 2002]

0.5 M of \[{{H}_{2}}S{{O}_{4}}\] is diluted from 1 litre to 10 litre, normality of resulting solution is [AFMC 2005]

20 g of hydrogen is present in 5 litre vessel. The molar concentration of hydrogen is [DPMT 2000]

\[9.8g\] of \[{{H}_{2}}S{{O}_{4}}\] is present in 2 litres of a solution. The molarity of the solution is [EAMCET 1991; MP PMT 2002]

Normality \[(N)\] of a solution is equal to

Molarity of \[0.2N\,{{H}_{2}}S{{O}_{4}}\] is [KCET 2005]

A solution of \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\,\{d=1.253\,gm/ml\}\]contain 22% salt by weight. The molarity, normality and molality of the solution is [MP PET 2004]

The normality of a solution of sodium hydroxide 100 ml of which contains 4 grams of \[NaOH\] is [CMC Vellore 1991]

The number of moles present in 2 litre of 0.5 M \[NaOH\] is [MH CET 2001]

What is the volume of \[0.1\,N\,HCl\] required to react completely with \[1.0g\] of pure calcium carbonate \[(Ca=40,\,C=12\] and \[O=16)\] [KCET 1998]

Which one of the following is an extensive property [KCET 1998]

Molecular weight of urea is 60. A solution of urea containing \[6g\] urea in one litre is [BHU 1996, 99]

A certain aqueous solution of \[FeC{{l}_{3}}\] (formula mass =162) has a density of \[1.1\,g/ml\] and contains \[20.0%\,FeC{{l}_{3}}\]. Molar concentration of this solution is [Pb. PMT 1998]

The normality of 10 lit. volume hydrogen peroxide is [Kerala CET (Med.) 2003]

Normality of \[2M\] sulphuric acid is [AIIMS 1991, 92; Pb. CET 2002]

When \[7.1gm\,N{{a}_{2}}S{{O}_{4}}\] (molecular mass 142) dissolves in \[100\,ml\,{{H}_{2}}O\], the molarity of the solution is [CBSE PMT 1991; MP PET 1993, 95]

\[25\,ml\] Of \[3.0\,M\,HN{{O}_{3}}\] are mixed with \[75\,ml\] of\[4.0\,M\,HN{{O}_{3}}\]. If the volumes are additive, the molarity of the final mixture would be [DPMT 1986; MH CET 2001]

If two substances \[A\] and \[B\] have \[P_{A}^{0}:\,P_{B}^{0}=1\,:\,2\] and have mole fraction in solution 1 : 2 then mole fraction of \[A\] in vapours [DPMT 2005]

The freezing point of one molal \[NaCl\] solution assuming \[NaCl\] to be 100% dissociated in water is (molal depression constant = 1.86) [CPMT 1985; BHU 1981; MP PMT 1997; UPSEAT 2001]

The vapour pressure of two liquids P and Q are 80 and 600 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be [CBSE PMT 2005]

The elevation in boiling point of a solution of 13.44g of CuCl2 in 1kg of water using the following information will be (Molecular weight of CuCl2 = 134.4 and Kb­ = 0.52 K molal-1) [IIT 2005]

For decolourization of 1 mole of \[KMn{{O}_{4}}\], the moles of \[{{H}_{2}}{{O}_{2}}\] required is [AIIMS 2004]

Oxidation number of Fe in \[{{[Fe{{(CN)}_{6}}]}^{-3}},\]\[{{[Fe{{(CN)}_{6}}]}^{-4}},\,{{[Fe(SCN)]}^{+2}}\] and \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{+3}}\] respectively would be-

What will be the oxidation number of I in the \[K{{I}_{3}}\]?

The order of increasing O.N. of S in \[{{S}_{8}},\,{{S}_{2}},\,O_{8}^{-2},\,{{S}_{2}}_{3}^{-2}\] is:

\[Mn{{O}_{4}}^{2-}\] undergoes disproportionation reaction in acidic medium but \[Mn{{O}_{4}}^{-}\] does not because

Oxidation states of the metal in the minerals hematite and magnetite, respectively, are

What will be the value of x, y and z in the following equation \[{{H}_{2}}{{C}_{2}}{{O}_{4}}+x{{H}_{2}}{{O}_{2}}\xrightarrow[{}]{{}}\]\[yC{{O}_{2}}+z{{H}_{2}}O\]

Which of the following reaction involves neither oxidation nor reduction

One mole of \[{{X}_{2}}{{H}_{4}}\] releases 10 moles of electrons to form a compound y. What should be the oxidation number of x in the compound y.

What are the oxidation numbers of carbon in HCN, CO, HNC, respectively?

On the basis of structure, the two sulphur atoms in \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] have

In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent?

The elevation in boiling point of a solution of 13.44g of CuCl2 in 1kg of water using the following information will be (Molecular weight of CuCl2 = 134.4 and Kb = 0.52 K molal-1) [IIT 2005]