The compound form when stannic chloride is treated with Con HCl is ..
20%
a) SnCl2
40%
b) (SnCl6)2-
20%
c) (SnCl4)2-
20%
d) Reaction wont take place
Q.6.
Carbon can act as an abrasive and also as lubricant because...
0%
a) It can form three dimensional tetra hedral covalent bond
20%
b) It have sheet like structure
20%
c) It can form Sp3 and Sp2 hybridization
60%
d) because of option (a) and (b)
Q.7.
Which of the following compound of lead is explosive ..
50%
a) PbSO4
0%
b) PbCl2
25%
c) CH3COOPb
25%
d) Pb((N3)2
Q.8.
Carbon suboxide C3O2 has ... [ DCE 2003]
75%
a) Distorted tetrahedral structure
0%
b) Trigonal planar structure
25%
c) Bent structure
0%
d) Linear structure
Q.9.
The general trained trend in the properties of elements of carbon family shows that with increases in atomic number?
0%
a) The tendency towards catenation increases
0%
b) The metallic character decreases
100%
c) Stability of +2 oxidation state increases
0%
d) tendency to form complex compound decreases
Q.10.
Which of the following statement is not true?
0%
a) Lead is a true metal with +2 electrovalency
0%
b) Lead reacts with HCl to form PbCl2
67%
c) PbCl4 is powerful reducing agent
33%
d) Lead dissolves in water to produce Pb(OH)2 in presence of O2
Q.11.
The silicate which do not contain discrete anions are
33%
a) Ortho silicate
0%
b) Sheet silicate
33%
c) Pyro silicate
33%
d) Cyclic silicate
Q.12.
Graphite is good conductor of electricity because..
0%
a) C in graphite is sp3 hybridized
33%
b) it has free electrons
67%
c) It is crystalline
0%
d) it has free atoms
Q.13.
Which of the following statement is not true?
0%
a) SnCl4 is oxidizing in nature
0%
b) SnCl2 is ionic solid
67%
c) PbCl2 is ionic solid
33%
d) SnCl4 is reducing in nature
Q.14.
In which colour can PbO exists
0%
a) Yellow
0%
b) Orange
33%
c) Red
67%
d) All of the above
Q.15.
What is the difference between two successive oxidation state of d block elements
0%
a) Two units
67%
b) One unit
0%
c) Three unit
33%
d) Different oxidation sates do not exists
Q.16.
The bond dissociation energy of B - F in BF3 is 646 kJ mol-1 whereas that of C - F in CF4 is 515 kJmol-The correct reason for higher B - F bond disassociation energy as compared to that of C - F is ... [ AIEEE 2009]
25%
a) smaller size of B atom as compared o that of C -atom
25%
b) Stronger 's' bond between B and F in BF3 as compared to that between C and F in CF4
50%
c) Significant pπ - pπ interaction between B and F in BF3, whereas there is no possibility of such interaction between C and F in CF
0%
d) Lower degree of pπ - pπ interaction between B and F in BF3 than between C and F in CF4
Q.17.
he tetrahalided of group 14 elements except that carbon act as
0%
a) Strong lewis bases
33%
b) Strong Lewis acid
33%
c) Strong reducing agent
33%
d) Strong oxidizing agent
Q.18.
Which of the following is not a compound
33%
a) White lead
33%
b) Black lead
0%
c) Red lead
33%
d) non of the above
Q.19.
Glass is a homogeneous mixture of
0%
a) Boron and silicon carbides
0%
b) Carbonates of alkali and alkaline earth metals
67%
c) Oxides of alkali and alkaline earth metals
33%
d) Different silicates and borates
Q.20.
Which is called whitegraphite
0%
a) SiO2
33%
b) BN
33%
c) B2O3
33%
d) SiC
Q.21.
Which of the following is the reaction for Plumosolvency
0%
a) 2Pb + O2 → 2PbO
0%
b) Pb +6 2HCl → PbCl2 + H2
67%
c) 2Pb + O2 + 2H2O → 2Pb(OH)2
33%
d) Pb + 2H2O → Pb(OH)2 + H2
Q.22.
hen alkali is added to an aqueous solution of a tin (II) salt, stannous hydroxide gets precipitate. On addition of more alkali, the precipitate dissolves due to the formation of
20%
a) SnO2. nH2O
20%
b) SnO22-
20%
c) SnO32-
40%
d) Sn(OH)2
Q.23.
An hydrous Satannic chloride can be prepared by
0%
a) Heating stannous chloride dihydrate
0%
b) Passing Cl2 over fused tin
67%
c) Heating tin in current of HCl gas
33%
d) Reacting SnO2 with HCl gas
Q.24.
A yellow solid, known to be a single compound is completely insoluble in hot water but dissolves in hot dilute HCl to give orange red solution. When this solution is cooled a white crystalline precipitate is formed. then compound is
0%
a) Chromium silicate
0%
b) copper oxide
75%
c) lead chromate
25%
d) ferric oxide
Q.25.
The glass with smallest coefficient of expansion is ..
0%
a) Soft glass
33%
b) Flint glass
67%
c) Borosil glass
0%
d) Jena glass
Q.26.
Lead is most readily dissolves in
33%
a) HCl
0%
b) H2SO4
0%
c) HNO3
67%
d) Acetic acid
Q.27.
Water transported through lead pipes becomes poisonous due to the formation of
0%
a) PbO
0%
b) PbO2
100%
c) Pb(OH)2
0%
d) Pb3O4
Q.28.
The order of decreasing ionic character of lead dihalides is
67%
a) PbF2 > PbCl2 > PbBr2 > PbI2
33%
b)PbI2 > PbBr2 >PbCl2 > PbF2
0%
c) PbF2 > PbCl2 >PbI2 > PbBr2
0%
d) PbI2 >PbCl2 > PbBr2 > PbF2
Q.29.
What is the colour of PbI2
0%
a) orange
33%
b) Yellow
0%
c) Red
67%
d) Blue
Q.30.
Lead pipe can be used safely for carrying
0%
a) soft water
33%
b) soft water first treated with lime stone
33%
c) Conc HNO3
33%
d) Soft as well as hard water
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.