MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
NEET
NEET Chemistry MCQ
Carbon Family Mcq Neet Chemistry
Quiz 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
Silicon is important constituent of .. [ CPMT 1988]
0%
a) Chlorophyll
0%
b) Hemoglobin
0%
c) Rocks
0%
d) Amalgams
Explanation
Answer: (c)
Q.2
When a mixture of air and steam is passed over red hot coke, the outgoing gas is .. [ CPMT 1990]
0%
a) Producer gas
0%
b) Water gas
0%
c) Coal gas
0%
d) None of these gases
Explanation
2H2O + O2 + 2C → 2H2 + 2CO2 Thus water gas is formed Answer: (b)
Q.3
A solid element ( Symbol Y) conducts electricity and form two chlorides YCln ( a colorless volatile liquid) and YCln-2 ( a colorless solid). To which one of the following groups of the periodic table does Y belong? [ Pb CET 1995]
0%
a) 13
0%
b) 14
0%
c) 15
0%
d) 16
Explanation
Answer: (b)
Q.4
Which of the following is most dense? [ CPMT 1996]
0%
a) Fe
0%
b) Cu
0%
c) B
0%
d) Pb
Explanation
Density increases with increase in atomic number Answer:(d)
Q.5
Carborundum is obtained when silica is heated at high temperature with .. [ IIT 1982]
0%
a) Carbon
0%
b) Carbon monoxide
0%
c) Carbon dioxide
0%
d) Calcium carbonate
Explanation
SiO2 + 3C → SiC + 2CO SiC is carborundum Answer: (a)
Q.6
The ion that can be precipitated by HCl as well as H2S is .. [ CBSE PMT 1996]
0%
a) Pb2+
0%
b) Fe3+
0%
c) Zn2+
0%
d) Cu2+
Explanation
Pb2+ + 2HCl → PbCl2 ( white ppt) + 2H+ Pb2+ + H2S → PbS ( black ppt) + 2H+ Answer: (a)
Q.7
White lead is .. [ MP PMT 1995]
0%
a) PbCO3
0%
b) PbCO3PBO
0%
c) Pb(OH)2 . 2PbCO3
0%
d) PbSO4 PbO
Explanation
Answer: (c)
Q.8
Na+, Mg+, Al3+ and Si4+ are isoelectronic, their ionic size will follow the order ... [ CBSE PMT 1993]
0%
a) Na+ > Mg2+ < Al3+ < Si4+
0%
b) Na+ < Mg2+ < Al3+ < Si4+
0%
c) Na+ > Mg2+ > Al3+ > Si4+
0%
d) Na+ < Mg2+ > Al3+ < Si4+
Explanation
All species have same number of electrons, i.e. they are isoelectronic. In such species as the charge on cation increases size decreases Answer:(c)
Q.9
Which does not exist.. [ CPMT 1988]
0%
a) [SiCl6]2-
0%
b) [GeF6]2-
0%
c) [CCl6]2-
0%
d) [SnCl6]2-
Explanation
Carbon can not expand its coordination beyond four due to absence of d-orbitals. Answer: (c)
Q.10
Silica is soluble in ... [ EAMCET 1998]
0%
a) HCl
0%
b) HNO3
0%
c) H2SO4
0%
d) HF
Explanation
SiO2 + 4HF → SiF4 + 2H2O SiF4 + 2HF → H2SiF6 Answer: (d)
Q.11
The shape of gaseous SnCl2 is .. [ Kerala MEE 2000]
0%
a) Tetrahedral
0%
b) Linear
0%
c) Angular
0%
d) T-shaped
Explanation
two bonding pairs and one nonbonding pair on the central Sn; the bond angles are roughly 109 degrees (p2 hybridized); the molecule is polar due to the angular shape Answer: (c)
Q.12
Butter of tin is ... [ BVP pune 2002]
0%
a) SnCl2. 5H2O
0%
b) SnCl2 .2H2O
0%
c) SnCl4 . 4H2O
0%
d) SnCl4.5H2O
Explanation
Answer:(d)
Q.13
Which of the following is a true acid anhydride
0%
a) Al2O3
0%
b) CO2
0%
c) CO
0%
d) Na2O
Explanation
Answer: (b)
Q.14
In the compound have the same crystal structure and analogous formulate they are called
0%
a) isotopes
0%
b) isobars
0%
c) allotropes
0%
d) isomers
Explanation
Answer: (c)
Q.15
Carbon monoxide is form by the action of Sulphuric acid on...
0%
a) Formic acid
0%
b) Oxalic acid
0%
c) Potassium ferro cyanide
0%
d) all these
Explanation
Conc sulphuric acid is both an oxidizing agent as well as dehydrating agent. Hence it removes a water molecule as a dehydrating agent and another water molecule by oxidizing hydrogen. Hence a mixture of CO and CO2 gases are formed. 2HCOOH → CO+CO2 + H2O Reaction of Oxalic acid: Oxalic acid is oxidsed to CO2 2KMnO4(aq) + 5H2C2O4(aq) + 3H2SO4(aq) --> 2MnSO4(aq) + K2SO4(aq) + 10CO2(g) + 8H2O Potassium ferro cyanide reacts with sulphuric acid gives Co K4[Fe(CN)6] + 6H2SO4 + 6H2O → 2K2SO4 + FeSO4 + 3(NH4)2SO4 + 6CO Answer: (c)
Q.16
The catenation tendency of C, Si and Ge is in the order Ge < Si < C. the bond energies ( in kJ mol-) of C - C, Si - Si and Ge - GE bonds respectively are ... [ EAMCET 2001]
0%
a) 167 , 180, 348
0%
b) 180, 167, 348
0%
c) 348, 167, 180
0%
d) 348, 180, 167
Explanation
Higher the bond energies of element-element, more is the catination tendency Answer:(d)
Q.17
C and Si have ... [ CPMT 1998]
0%
a) same physical properties
0%
b) Different physical properties
0%
c) Same physical properties but different chemical properties
0%
d) Different physical and chemical properties
Explanation
Si do not form SiO where as C can form CO Answer: (d)
Q.18
CO2 is gas at room temperature while SiO2 is solid why?
0%
a) Molecular mass of SiO2 is high
0%
b) three dimensional network of SiO2
0%
c) Higher electro negativity of C
0%
d) Acidic character of SiO2
Explanation
Answer: (b)
Q.19
Pyrosilicate ion is ... {kerala EE 2002]
0%
a) SiO22-
0%
b) SiO42-
0%
c) Si2O67-
0%
d) Si2O76-
Explanation
Answer: (d)
Q.20
The most stable +2 oxidation state is exhibited by ... [ Kerala MEE 2000]
0%
a) Fe
0%
b) Sn
0%
c) Pb
0%
d) Si
Explanation
Due to inert pair effect Pb shows stable oxidation state Answer:(c)
Q.21
Which of the following is most electronegative? [ CPMT 1999]
0%
a) Pb
0%
b) Si
0%
c) C
0%
d) Sn
Explanation
Electronegativity decreases down the group Answer: (c)
Q.22
The electronic configuration of four different elements is given below. Identify the group 14 element among these
0%
a) [He]2s1
0%
b) [Ne]3s2
0%
c) [Ne]3s23p2
0%
d) [Ne] 3s2 3p5
Explanation
Answer: (c)
Q.23
Which is not true for silicones
0%
a) Low thermal conductivity
0%
b) Low chemical reactivity
0%
c) Does not support microbiological growth
0%
d) All silicone are solid plastic at room temperature
Explanation
Answer: (d)
Q.24
Black lead is
0%
a) Diamonds
0%
b) Graphite
0%
c) Charcoal
0%
d) Coke
Explanation
Answer:(b)
Q.25
Ge(II) compounds are powerful reducing agents where as Pb(IV) compounds are strong oxidising agents. It can be due to [ Pb.CET 1998]
0%
a) Pb is more electro positive than Ge
0%
b) Ionizing potential of lead is less than that of Ge
0%
c) Ionic radii of Pb4+ and Pb2+ are larger than those of Ge4+ and Ge2+
0%
d) More pronounced inert pair effect in lead than Ge
Explanation
Pb4+ reduces to Pb2+ due to inert pair effect hence at as strong oxidising agent Answer: (d)
Q.26
Mark the oxide which are amphoteric in character [ MP PMT 2000]
0%
a) CO2
0%
b) SiO2
0%
c) SnO2
0%
d) CaO
Explanation
Answer: (c)
Q.27
Quartz is a /an .. [ DPMT 2002]
0%
a) Orthosilicate
0%
b) Pyrosilicate
0%
c) Sheet silicate
0%
d) Three dimensional silicate
Explanation
Answer: (d)
Q.28
Select incorrect statement
0%
a) In three dimensional net work each silicon share three oxygen atoms
0%
b) In Si2O76- there is one shared electron
0%
c) In SiO44- there no oxygen shared
0%
d) There are three shared electron for three dimensional network silica
Explanation
Four exigent atoms are shared basic unit is (SiO3)n Answer:(d)
Q.29
Percentage of lead in lead pencil is .... [ DPMT 1999]
0%
a) Zero
0%
b) 20
0%
c) 80
0%
d) 70
Explanation
lead pencil contain graphite Answer: (a)
Q.30
Inert pair effect is exhibited by .. [ Hariyana CEET 2003]
0%
a) Pb
0%
b) B
0%
c) Si
0%
d) Al
Explanation
Answer: (a)
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page