Page 65 - Chemistry ICSE Class X

Chemical Bonding 53
Q 20. %JQQUG VJG EQTTGEV CPUYGT HTQO VJG QRVKQPU IKXGP DGNQY [ICSE 2016]
(i) An element with the atomic number 19 will most likely combine chemically with the element whose atomic
PWODGT KU
(A) 17 (B) 11 (C) 18 (D) 20
Q 21. +FGPVKH[ VJG VGTO UWDUVCPEG KP GCEJ QH VJG HQNNQYKPI [ICSE 2016]
(i) The tendency of an atom to attract electrons to itself when combined in a compound.
(ii) The electrons present in the outermost shell of an atom. [ICSE 2016]
Q 22. 6JG HQNNQYKPI VCDNG UJQYU VJG GNGEVTQPKE EQPſIWTCVKQP QH VJG GNGOGPVU 9 : ; < [ICSE 2016]
Element W X Y Z
'NGEVTQPKE %QPſIWTCVKQPU 2, 8, 1 2, 8, 7 2, 5 1
#PUYGT VJG HQNNQYKPI SWGUVKQPU DCUGF QP VJG VCDNG CDQXG
K 9JCV V[RG QH DQPF KU HQTOGF DGVYGGP
(1) W and X (2) Y and Z
KK 9JCV KU VJG HQTOWNC QH VJG EQORQWPF HQTOGF DGVYGGP
(1) X and Z (2) W and X
Q 23. $[ FTCYKPI CP GNGEVTQP FQV FKCITCO UJQY VJG HQTOCVKQP QH COOQPKWO KQP #VQOKE 0Q 0 CPF *
[ICSE 2016]
Q 24. Fill in the blank with the choices given in brackets. [ICSE 2017]
(i) The compound that does not have a lone pair of electrons is ________ . (water, ammonia, carbon tetrachloride)
Q 25. %JQQUG VJG EQTTGEV CPUYGT HTQO VJG QRVKQPU IKXGP DGNQY [ICSE 2017]
(i) Which of the following is a common characteristic of a covalent compound?
(1) High melting point
(2) Consists of molecules
(3) Always soluble in water
(4) Conducts electricity when it is in the molten state
Q 26. 5VCVG VJG V[RG QH DQPFKPI KP VJG HQNNQYKPI OQNGEWNGU [ICSE 2017]
(i) Water (ii) Calcium oxide
Q 27. &TCY CP GNGEVTQP FQV FKCITCO VQ UJQY VJG HQTOCVKQP QH GCEJ QH VJG HQNNQYKPI EQORQWPFU [ICSE 2017]
(i) Methane (ii) Magnesium chloride (H = 1, C = 6, Mg = 12, Cl = 17)
Q 28. )KXG QPG YQTF QT C RJTCUG HQT VJG HQNNQYKPI UVCVGOGPV [ICSE 2018]
Process of formation of ions from molecules which are not in ionic state.
Q 29. )KXG C TGCUQP HQT GCEJ QH VJG HQNNQYKPI [ICSE 2018]
(i) Ionic compounds have a high melting point.
(ii) Inert gases do not form ions.
(iii) Conductivity of dilute hydrochloric acid is greater than that of acetic acid.
Q 30. Fill up the blank with the correct choice given in brackets. [ICSE 2018]
+QPKE QT GNGEVTQXCNGPV EQORQWPFU FQ PQV EQPFWEV GNGEVTKEKV[ KP VJGKT AAAAAAAAAAAAA UVCVG HWUGF UQNKF
Q 31. (i) What do you understand by a lone pair of electrons? [ICSE 2018]
(ii) Draw the electron dot diagram of hydronium ion. (H = 1; O = 8)
Q 32. Copy and complete the following table which refers to the conversion of ions to neutral particles. [ICSE 2018]
Conversion +QPKE 'SWCVKQP 1ZKFCVKQP 4GFWEVKQP
Chloride ion to chlorine molecule (i) __________ (ii) __________
Lead(II) ion to lead (iii) __________ (iv) __________