CuSO4 (aq.)MN+O
Then final products N and O are respectively.
1. [Cu(CN)4]3-,(CN)2
2. CuCn,(CN)2
3. [Cu(CN)4]2-,(CN)2
4. Cu(CN)2,K2S
CrO42- (yellow) changes to Cr2O72- (orange) in pH = x and vice versa in pH = y.
The value of x and y will be:
1. 6, and 8
2. 6, and 5
3. 8, and 6
4. 7, and 7
When steam is passed over red hot iron , the substances formed are:
1. Fe2O3 +H2
2. Fe3O4 +H2
3. FeO +H2
4. FeO+ H2 +O2
Which of the following solid salt on heating with K2Cr2O7 and Conc. H2SO4 orange,red vapours are evolved which turn aquous NaOH solution yellow?
1. NaBr
2. NaCl
3. NaNO3
4. NaI
Consider the following transformation:
2CuX22CuX+X2
Then X- can be :
1. F-,Br-
2. Cl-,Br-
3. CN-
4. Cl-,F-
The iron salt used in blue prints is:
1. FeC2O4
2. Fe2(C2O4)3
3. K4Fe(CN)6
4. FeSO4
Which element among the following has the highest melting point?
1. Cr
2. Fe
3. Cu
4. Mo
The colour of KMnO4 is due to :
1. d-d transition
2. Charge transfer spectra
3. Polarisation of ion
4. p-d transition
Which of the following element does not show the variable oxidation state?
1. Fe
2. Mn
3. Cu
4. Zn
With F highest stable oxidation state of Mn is
1. +6
2. +4
3. +7
4. +3
Cr2O72-+XCr3++H2O + oxidized product of X. X in the above reaction cannot be
1. C2O42-
2. Fe2+
3. SO42-
4. S2-
A pair of ions having similar magnetic moments is:
1. Ti3+,V3+
2. Cr3+,Mn2+
3. Mn2+,Fe3+
4. Fe2+,Mn2+
The main reason for a larger number of oxidation states exhibited by the actinoids than the corresponding lanthanoids is
1. The lesser energy difference between 5f and 6d orbitals than 4f and 5d orbitals
2. Larger atomic size of actinoids than the lanthanoids
3. More energy difference between 5f and 6d orbitals than between 4f and 5d orbitals
4. Greater reactive nature of the actinoids than the lanthanoids
In the dichromate ion Cr2O72-,
1. 4 Cr-O bonds are equivalent
2. 6 Cr-O bonds are equivalent
3. All Cr-O bonds are equivalent
4. None of Cr-O bonds are equivalent
The electronic configuration of a transition element X in +3 Oxidation state is [Ar]3d5.
The atomic number of X is :
1. 25
2. 26
3. 27
4. 24
Magnetic moment of K3[Fe(CN)5(H2O)] is
1. 0
2. 4.92
3. 3.87
4. 2.83
HgCl2 and I2 both when dissolved in water containing I- ions the pair of species formed is
(a) HgI2, (b) HgI2, I-
(c) (d) Hg2I2, I-
The incorrect statement regarding the lanthanons is ;
1. | Europium shows +2 oxidation state |
2. | The basicity decreases as the ionic radius decreases from Pr to Lu |
3. | All the lanthanons are much more reactive than aluminium |
4. | Ce (+4) solutions are widely used as oxidising agents in volumetric analysis |
The correct electronic configuration of Gadolinium(Atomic number = 64) is :
1. [Xe]4f86d2
2. [Xe]4f95s1
3. [Xe]4f75d16s2
4. [Xe]4f65d26s2
Assuming complete ionisation, same moles of which of the following compounds will
require the least amount of acidified KMnO4 for complete oxidation?
1. FeSO4
2. FeSO3
3. FeC2O4
4. Fe(NO2)2
The reason for lanthanoid contraction is:
1. Negligible screening effect of 'f' orbitals
2. Increasing nuclear charge
3. Decreasing nuclear charge
4. Decreasing screening effect
A diamagnetic lanthanoid ion among the following is :
(At. numbers: Ce = 58, Sm = 62, Eu = 63, Yb = 70)
1. Ce2+
2. Eu2+
3. Sm2+
4. Yb2+
KMnO4 can be prepared from K2MnO4 as per reaction
The reaction can go to completion by removing OH- ions by adding
1. HCl
2. KOH
3. CO2
4. SO2
Identify the mixture of metals that contain a non-metal as a constituent in it.
1. lnvar
2. Steel
3. Bell metal
4. Bronze
Which of the following ions will exhibit colour in aqueous solutions ?
1. La3+ (Z=57)
2. Ti3+ (Z=22)
3. Lu3+ (Z=71)
4. Sc3+ (Z=21)
In which of the following pairs are both the ions coloured in aqueous solution?
(1) Ni2+, Ti3+
(2) Sc3+, Ti3+
(3) Sc3+, Co2+
(4) Ni2+, Cu+
(At. no : Sc =21, Ti = 22, Ni = 28, Cu = 29, Co = 27)
Which of the following order of CFSE is incorrect?
(b)
(c)
(d)
The CFSE for complex is 18000 . The for will be:
(a) 18000 (b) 16000
(c) 8000 (d) 2000
Which of the following is called Wilkinson's catalyst:
(a) (b)
(c) (d)
Which of the following is correct?
(a) X= black, ,Y=Blue, , Z =
(b) X= green, , Y=Yellow ,, Z =
(c) X= black, , Y = green, , z =
(d) x = black, , Y = Colourless, , z =
Acidified permanganate solution does not oxidize:
(1)
(2)
(3)
(4)
Which of the following solid salt on heating with solid and conc. orange red vapours are evolved which turn aqueous NaOH solution yellow?
(a)NaBr (b) NaCl
(c) (d) NaI
Which of the following is true for the species configuration ?
(1) is reducing in nature
(2) is oxidising in nature.
(3) Both (A) and (B)
(4) None of these
In which compound does vanadium have an oxidation number of +4?
(A)
(B)
(C)
(D)
Arrange the following species in the increasing order of their magnetic properties.
I II III IV
(1) III<II<I<IV
(2) III<IV<II<I
(3) II<III<I<IV
(4) IV<I<II<III
Which of the following increasing order of oxidising power is correct for the following species?
(A)
(B)
(C)
(D)
At
1. Decomposes into
2. Decomposes into
3. Sublimes go give liquid
4. Sublimes to give gaseous dimmer
Anhydrous ferric chloride is prepared by
(1) Heating hydrated ferric chloride at a high temperature in a stream of air.
(2) Heating metallic iron in a stream of dry chlorine gas.
(3) Reaction of ferric oxide with HCl (aq).
(4) Reaction of metallic iron with HCl (aq).
Select the correct statement :
(1) reduces to metallic Ag.
(2) Organic tissues turn black by reducing it to Ag.
(3) is soluble in .
(4) All are correct statements.
Which of the following products are formed when potassium bromide reacts with potassium permanganate in alkaline pH?
1.
2.
3.
4.
Which of the following pairs of compounds are more stable
(A)
(B) NiCl4, PtCl4
(C)
(D) PtCl2, NiCl2
Which of the following species has the highest number of unpaired electrons?
1. Fe2+
2. Fe3+
3. Co3+
4. Co2+
Heating of Ag with dil. HNO3 give
1. NO
2. NO2
3. N2O
4. N2O3
When excess of SnCl2 is added to HgCl2, the substance formed is
1. Hg2Cl2
2. Sn
3. Hg
4. Cl2
Which of the following elements form stable dinuclear ions
1. Zn
2. Cd
3. Hg
4. Fe