Q.1
Which of the following conceivable structures for CCL4 will have a zero dipole moment?
  • a) Square planar
  • b) Square pyramid ( Carbon at apex
  • c) Irregular tetrahedron
  • d) Regular tetrahedron
Q.2
The soliders of Nepolean army while at Alps during freezing winter suffered a series problem as regards of the tin buttons of their uniforms. White metallic tin buttons got converted to gray powder. This transformation is related to .. [ AIEEE2004]
  • a) An interaction with nitrogen of the air at very low temperature
  • b) A change in crystalline structure of tin
  • c) A change in the partial pressure of oxygen in air
  • d) An interaction with water vapour contained in humid air
Q.3
[SiO4]4- has tetrahedral structure, the silicate formed by using the three oxygen has
  • a) Two dimension; sheet structure
  • b) Pyrosilicate structure
  • c) Linear polymer structure
  • d) Three dimensional structure
Q.4
Which does not exists
  • a) Si2O76-
  • b) [CCl6]2-
  • c) [SiCl6]2-
  • d) [GeCl6]2-
Q.5
The oxide which can not act as reducing agent is ...
  • a) SO2
  • b) NO2
  • c) CO2
  • d) PCl3
Q.6
In silicon dioxied [ AIEEE 2005]
  • a) Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bounded to two silicon atoms
  • b) Each silicon atom is surrounded by two Oxygen atom and each oxygen atom is bonded to two silicon atoms
  • c) Silicon is bonded to two silicon atoms
  • d) There are double bonds between silicon and oxygen atoms
Q.7
The stability of carbon tetrahalides of carbon decreases in the order
  • a) CF4 > CCl4 >CBr4 > CI4
  • b)CI4 > CBr4 > CCl4 > CF4
  • c) CI4 >CCl4 > CBr4 > CF4
  • d) CF4 >CBr4 > CCl4 > CI4
Q.8
Water gas is a mixture of
  • a) H2 and Air
  • b) CO and H2
  • c) CO2 and H2
  • d) H2O and CO
Q.9
Which of the following is amphotoric
  • a) CO2
  • b) SiO2
  • c) SnO2
  • d) CaO
Q.10
The stability of dihalides of Si, Ge, Sn and Pb increases steadly in sequence... [ AIEEE 2007]
  • a) PbX2 << SnX2 << GeX2 << SiX2
  • b) GeX2<< SiX2 << SnX2 << PbX2
  • c) SiX2 << GeX2 << PbX2 << SnX2
  • d) SiX2 << geX2 << SnX2 << PbX2
Q.11
Which of the following is the most ionic?
  • a) CCl4
  • b) SbCl4
  • c) PbCl4
  • d) SbCl2
Q.12
Which one of the following is not a property of carbon
  • a) It exhibits catenation
  • b) It forms multiple bonds
  • c) Its melting point and boiling points are very high
  • d) It is a semi-metal
Q.13
Which of the following is most allotropes of carbon is isomorphous with crystalline silicon?
  • a) Coke
  • b) Diamond
  • c) Graphite
  • d) Coal
Q.14
Carborundum is obtained when silica is heated at high temperature with .. [ IIT 1982]
  • a) Carbon
  • b) Carbon monoxide
  • c) Carbon dioxide
  • d) Calcium carbonate
Q.15
In the carbon family the elements other than carbon do not form pπ-pπ bonds because the atomic orbitals are to
  • a) small and diffuse to under go sideways overlap
  • b) large and diffuse to under go sideways overlap
  • c) small and far to under go sideways overlap
  • d) large and far to under go sideways overlap
Q.16
Which of the following gas has highest calorific value?
  • a) Coal gas
  • b) Water gas
  • c) Producer gas
  • d) Carbon dioxide gas
Q.17
Out of following which do not form mono-oxide ..
  • a) Lead
  • b) Tin
  • c) Germanium
  • d) Silicon
Q.18
Moderate electrical conductivity is shown by .. [ IIT 1982]
  • a) Silica
  • b) Graphite
  • c) Diamond
  • d) Carborundum
Q.19
Which of the following statements is correct?
  • a) Graphite is thermodynamically more stable than diamond
  • b) Diamond is thermodynamically more stable than graphite
  • c) Graphite changes spontaneously to diamond
  • d) Diamond changes to graphite spontaneously
Q.20
Carbogen is
  • a) Pure form of carbon
  • b) CPOCl2
  • c) Mixture of CO and CO2
  • d) Mixture of O2 and CO2
Q.21
SiO2 is reacted with sodium carbonate, What is the gas liberated/
  • a) CO
  • b) O2
  • c) CO2
  • d) O3
Q.22
The species that does not contain peroxide ions is .. [ IIT 1992]
  • a) PbO2
  • b) H2O2
  • c) SrO2
  • d) BaO2
Q.23
Chemically zeolites are
  • a) Aluminosilicate
  • b) Calcium aluminosilicate
  • c) Hydrated aluminosilicate
  • d) None
Q.24
HCOOH reacts with concentrated H2SO4 to produce
  • a) CO
  • b) CO2
  • c) SO2
  • d) NO2
Q.25
Thomas slag is ..
  • a) Ca3(PO4)2
  • b) CaSiO3
  • c) Mixture of a and b
  • d) Na2SiO3
Q.26
(Me)SiCl2 on hydrolysis will produce .. [ IIT 2003]
  • a) (Me)2Si(OH)2
  • b) (Me)2Si = O
  • c) -[(Me)2Si - O]-n
  • d) (Me)2SiCl(OH)
Q.27
CCl4 does not show hydrolysis but SiCl4 is readily hydrolyzed because
  • a) Carbon cannot expand its octet but silicon can expand
  • b) Electronegativity of carbon is higher than silicon
  • c) Ionization energy of carbon is higher than of silicon
  • d) Carbon form double and triple bonds but not silicon
Q.28
Carbon monoxide reacts with Cl2 in presence of sunlight to give
  • a) Phosgene
  • b) COCl
  • c) Phosphine
  • d) CCl4
Q.29
Which one of the following is correct set for SiO2
  • a) Linear, acidic
  • b) Linear, basic
  • c) Tetra hedral, acidic
  • d) Angular, basic
Q.30
A metal, M forms chlorides in +2 and +4 oxidation states. Which of the following statements about these chlorides is correct? [ AIEEE 2006]
  • a) MCl2 is more volatile than MCl4
  • b) MCl2 is more soluble in anhydrous ethanol than MCl4
  • c) MCl2 is more ionic than MCl4
  • d) MCl2 is more easily hydrolyzed than MCl4
0 h : 0 m : 1 s