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41. Which element forms maximum multiple bonds? (NTSE Madhya Pradesh, Stage-I, 2014-15)
N
P
As
Bi
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42. Which one of the following possesses covalent, ionic as well as co-ordinate covalent bonds? (NTSE Andhra Pradesh, Stage-I, 2014-15)
HCI
NH4CI
CI2
CH4
43. How many number of 'sigma' bonds are present in CH3 - C≡N? (NTSE Andhra Pradesh, Stage-I, 2014-15)
4
3
2
5
44. Among LiCI, RbCI, BeCI2 and MgCI2 which two are the highest and the lowest ionic compounds? (NTSE West Bengal, Stage-I, 2014-15)
LiCI & RbCI
RbCI & BeCI2
RbCI & MgCI2
MgCI2 & BeCI2
45. The number and type of bonds between carbon atoms in CaC2 are (NTSE Odisha, Stage-I, 2014-15)
One sigma (σ) and one pi (π) bond
One sigma (σ) and two pi (π) bonds
One sigma (σ) and one half pi (π) bond
Two sigma (σ) bonds and one pi (π) bond
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