Tin dissolves in concentrated and dil. H2SO4 as well as HNO3 at temp 150 degree celcius.Which of the following is not the exact product of this process?

1.  SnSO4

2.  SnSO42

3.  SnNO33

4.  H2SnO3  

Subtopic:  Properties of Glass, Pb & Sn compounds |
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Boric acid on heating at 150°C gives

1.  B2O3

2.  H2B4O7

3.  HBO2

4.  H2BO3

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Mellitic acid formed by the oxidation of graphite with 

1.  Chromic acid

2.  Alkaline KMnO4/heat

3.  Fuming HNO3

4.  dil. HNO3

Subtopic:  Boron Family- Preparations, Properties & Uses |
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Incorrect option about 2-D sheet silicates is

1. Two O-atoms of each tetrahedra are shared

2. General formula is Si2O5n2n-

3. Co-ordination number of Si is 4

4. Number of O-atoms per tetrahedra unit is 52

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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The correct formula of colemanite mineral is:

1.  Ca2B6O115H2O

2.  CaB4O7.NaBO28H2O

3.  2Mg3B8O15MgCl2

4.  Ca2B6O11.3H2O

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Hydrolysis of SiF4 gives a compound, in which maximum coordination number of Si is

1.  6

2.  4

3.  8

4.  7

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 55%
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H2C2O4ΔGas(A)+Gas(B)+liquid(C).

Gas (A) burns with blue flame and it oxidised to (B)
Gas(A)+CI2(D) NH3,(E)

A, B, C and E are respectively

1.  CO, CO2, COCl2 and HCONH2

2.  CO, CO2, H2O, COCl2

3.  CO2, CO, H2O, HCONH2

4.  CO, CO2, H2O, NH2CONH2

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 53%
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Which among CH4SiH4GeH4 and SnH4 is most volatile?

1.  CH4

2.  SiH4

3.  GeH4

4.  SnH4

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 61%
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Borazine is called inorganic benzene. It has a ring structure with alternate BH and NH groups. Which of the following statements is not correct about borazine?

1.  Each B and N atom is sp2 hybridized

2.  Borazine satisfies the (4n + 2)π electrons Huckel's rule

3.  Like organic benzene, borazine does not give addition product with HCI

4.  Borazine contains dative pπ - pπ bond

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 64%
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The incorrect statement for orthoboric acid is

1.  It can not be titrated satisfactorily with NaOH, as a sharp endpoint is not obtain

2.  The acidity of its aqueous solution increases upon the addition of ethylene glycol

3.  It is a weak electrolyte in water

4.  It has a three-dimensional structure due to hydrogen bonding

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
From NCERT
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