OBJECTIVE CHEMISTRY JA The loal number of Na ions present per unit cell of Nac is CHEMICAL BONDING a) 1 b) 6 The mumber of ion pairs that constitute one mit cel of CC c) 8 d) 4 a) 4 b) 2 e) 8 d) 1 Which of the following is not involved im Bom-Haber cyele a) Sublimation energy el Lattice energy b) lonisation potential d) Electonegativity 11 What is the crystal structure of CsC a) Body centered cubic e) Tetrahedral b) Face centered cubic d) Octabedral 4 Which of the following is a favoumhle fctor for cution furmation? a) High electronegativity e) Low ionisation potential b) High electron affinity d) Smaller atomic size 15. Two elements X' and Y have the following configuration X= 1s 2 2p 3 3p 4s, Y- Is 2s 2p 3s 3p The compound formed by the combination of X and Y will he a) XY; b) X,Y: e) X,Y, d) XY, 16 From the electronic structure of four elements perdict the one with greater tendency to form electrovalent bond is a) 1s b) Is', 2s", 2p c) 1s, 2s, 2p d) Is', 25, 2p 17. Which of the following is favourable condition for the formation of ionic bond? a) Small cation with small charge b) Small anion with large charge c) Large differecne in the electronegativity d) Small cation with high charge More than One correct answer Type Questions T8. The bond between the atoms may be formed by a) Transfer of clectrons b) Sharing of electrons d) Transfer of neutrons c) Transfer of protons . Amongst, the species with formal charge- on the central atom b) ICI, d) 1, c) Co,- a) BF, 20 Two elements have electronegativity of 12 and 3.0 hond formed between them would be a) lonic c) Co-ordinate d) Metallic b) Polar covalent Among the following which hydrides are covalent b) B,H, c) NaH d) CaH, a) NH, Most favourable condition for ionic bonding are a) Low charge on ions, large cations, small anions b) Low charge on ions, large cations, large anions e) High charge on ions, small cations, large anions 4) High charge on ions, large cations, small anions ITE SERIES for Sri Chaitanya Jr. ICON Students 133