Q.1
The oxidation number of C in CH2O is
  • a) -1
  • b) +2
  • c) zero
  • d) -4
Q.2
Chrome yellow is
  • a) PbCrO4
  • b) Cr2O72-
  • c) PbCl2
  • d) PbCO3
Q.3
What happened when SiO4 4- is heated
  • a) Si2O76-
  • b) Changes to Si4O116-
  • c) Changes to SiO2
  • d) Nothing will happen
Q.4
Reaction of tin with excess nitric acid gives
  • a) stanic nitrate
  • b) stanus nitrate
  • c) three wont be any reaction
  • d) metastannic acid
Q.5
The compound form when stannic chloride is treated with Con HCl is ..
  • a) SnCl2
  • b) (SnCl6)2-
  • c) (SnCl4)2-
  • d) Reaction wont take place
Q.6
Carbon can act as an abrasive and also as lubricant because...
  • a) It can form three dimensional tetra hedral covalent bond
  • b) It have sheet like structure
  • c) It can form Sp3 and Sp2 hybridization
  • d) because of option (a) and (b)
Q.7
Which of the following compound of lead is explosive ..
  • a) PbSO4
  • b) PbCl2
  • c) CH3COOPb
  • d) Pb((N3)2
Q.8
Carbon suboxide C3O2 has ... [ DCE 2003]
  • a) Distorted tetrahedral structure
  • b) Trigonal planar structure
  • c) Bent structure
  • d) Linear structure
Q.9
The general trained trend in the properties of elements of carbon family shows that with increases in atomic number?
  • a) The tendency towards catenation increases
  • b) The metallic character decreases
  • c) Stability of +2 oxidation state increases
  • d) tendency to form complex compound decreases
Q.10
Which of the following statement is not true?
  • a) Lead is a true metal with +2 electrovalency
  • b) Lead reacts with HCl to form PbCl2
  • c) PbCl4 is powerful reducing agent
  • 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
  • a) Ortho silicate
  • b) Sheet silicate
  • c) Pyro silicate
  • d) Cyclic silicate
Q.12
Graphite is good conductor of electricity because..
  • a) C in graphite is sp3 hybridized
  • b) it has free electrons
  • c) It is crystalline
  • d) it has free atoms
Q.13
Which of the following statement is not true?
  • a) SnCl4 is oxidizing in nature
  • b) SnCl2 is ionic solid
  • c) PbCl2 is ionic solid
  • d) SnCl4 is reducing in nature
Q.14
In which colour can PbO exists
  • a) Yellow
  • b) Orange
  • c) Red
  • d) All of the above
Q.15
What is the difference between two successive oxidation state of d block elements
  • a) Two units
  • b) One unit
  • c) Three unit
  • 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]
  • a) smaller size of B atom as compared o that of C -atom
  • b) Stronger 's' bond between B and F in BF3 as compared to that between C and F in CF4
  • 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
  • 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
  • a) Strong lewis bases
  • b) Strong Lewis acid
  • c) Strong reducing agent
  • d) Strong oxidizing agent
Q.18
Which of the following is not a compound
  • a) White lead
  • b) Black lead
  • c) Red lead
  • d) non of the above
Q.19
Glass is a homogeneous mixture of
  • a) Boron and silicon carbides
  • b) Carbonates of alkali and alkaline earth metals
  • c) Oxides of alkali and alkaline earth metals
  • d) Different silicates and borates
Q.20
Which is called whitegraphite
  • a) SiO2
  • b) BN
  • c) B2O3
  • d) SiC
Q.21
Which of the following is the reaction for Plumosolvency
  • a) 2Pb + O2 → 2PbO
  • b) Pb +6 2HCl → PbCl2 + H2
  • c) 2Pb + O2 + 2H2O → 2Pb(OH)2
  • 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
  • a) SnO2. nH2O
  • b) SnO22-
  • c) SnO32-
  • d) Sn(OH)2
Q.23
An hydrous Satannic chloride can be prepared by
  • a) Heating stannous chloride dihydrate
  • b) Passing Cl2 over fused tin
  • c) Heating tin in current of HCl gas
  • 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
  • a) Chromium silicate
  • b) copper oxide
  • c) lead chromate
  • d) ferric oxide
Q.25
The glass with smallest coefficient of expansion is ..
  • a) Soft glass
  • b) Flint glass
  • c) Borosil glass
  • d) Jena glass
Q.26
Lead is most readily dissolves in
  • a) HCl
  • b) H2SO4
  • c) HNO3
  • d) Acetic acid
Q.27
Water transported through lead pipes becomes poisonous due to the formation of
  • a) PbO
  • b) PbO2
  • c) Pb(OH)2
  • d) Pb3O4
Q.28
The order of decreasing ionic character of lead dihalides is
  • a) PbF2 > PbCl2 > PbBr2 > PbI2
  • b)PbI2 > PbBr2 >PbCl2 > PbF2
  • c) PbF2 > PbCl2 >PbI2 > PbBr2
  • d) PbI2 >PbCl2 > PbBr2 > PbF2
Q.29
What is the colour of PbI2
  • a) orange
  • b) Yellow
  • c) Red
  • d) Blue
Q.30
Lead pipe can be used safely for carrying
  • a) soft water
  • b) soft water first treated with lime stone
  • c) Conc HNO3
  • d) Soft as well as hard water
0 h : 0 m : 1 s