Page 35 - Chemistry ICSE Class X

Periodic Properties and Variations of Properties (Physical and Chemical) 23
KKK 5VCVG VJG HQTOWNC DGVYGGP < CPF *[FTQIGP
(iv) What kind of a compound is this?
Q 18. Choose the most appropriate answer for the following: [ICSE 2015]
(i) Among the elements given below, the element with the least electronegativity is:
(A) Lithium (B) Carbon (C) Boron (D) Fluorine
Q 19. Answer the following: [ICSE 2015]
6JG OGVCNU QH )TQWR HTQO VQR VQ DQVVQO CTG $G /I %C 5T CPF $C
(i) Which one of these elements will form ions most readily and why?
KK 5VCVG VJG EQOOQP HGCVWTG KP VJG GNGEVTQPKE EQPſIWTCVKQP QH CNN VJGUG GNGOGPVU
Q 20. Arrange the following as per the instructions given in the brackets: [ICSE 2015]
K %U 0C .K - 4D KPETGCUKPI QTFGT QH OGVCNNKE EJCTCEVGT
KK /I %N 0C 5 5K FGETGCUKPI QTFGT QH CVQOKE UK\G
KKK 0C - %N 5 5K KPETGCUKPI QTFGT QH KQPK\CVKQP GPGTI[
KX %N ( $T + KPETGCUKPI QTFGT QH GNGEVTQP CHſPKV[
Q 21. (KNN KP VJG DNCPM YKVJ VJG EJQKEGU IKXGP KP DTCEMGVU [ICSE 2016]
(i) Metals are good ___________ QZKFK\KPI CIGPVU TGFWEKPI CIGPVU DGECWUG VJG[ CTG GNGEVTQP ___________
CEEGRVQTU FQPQTU
(ii) If an element has a low ionization energy then it is likely to be ___________ OGVCNNKE PQP OGVCNNKE
(iii) If an element has seven electrons in its outermost shell then it is likely to have the ___________ NCTIGUV
UOCNNGUV CVQOKE UK\G COQPI CNN VJG GNGOGPVU KP VJG UCOG RGTKQF
(iv) The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively
charged gaseous ion is called ___________ GNGEVTQP CHſPKV[ KQPKUCVKQP RQVGPVKCN GNGEVTQPGICVKXKV[ [ICSE 2017]
Q 22. Rewrite the following sentences by using the correct symbol > (greater than) or < (less than) in the blanks given:
[ICSE 2016]
(i) The ionization potential of Potassium is ___________ VJCV QH 5QFKWO
(ii) The electronegativity of Iodine is ___________ VJCV QH %JNQTKPG
Q 23. Use the letters only written in the periodic table given below to answer the questions that follow: [ICSE 2016]

K 5VCVG VJG PWODGT QH XCNGPEG GNGEVTQPU KP CVQO ,
(ii) Which element shown forms ions with a single negative charge?
(iii) Which metallic element is more reactive than R?
(iv) Which element has its electrons arranged in four shells?
Q 24. Match the atomic number 2, 4, 8, 15, and 19 with each of the following: [ICSE 2017]
K # UQNKF PQP OGVCN DGNQPIKPI VQ VJG VJKTF RGTKQF
KK # OGVCN QH XCNGPE[
KKK # ICUGQWU GNGOGPV YKVJ XCNGPE[
KX #P GNGOGPV DGNQPIKPI VQ ITQWR
X # TCTG ICU
Q 25. Arrange the following as per the instruction given in the bracket: [ICSE 2017]
(i) He, Ar, Ne (Increasing order of the number of electron shells)
(ii) Na, Li, K (Increasing Ionisation Energy)
(iii) F, Cl, Br (Increasing electronegativity)
(iv) Na, K, Li (Increasing atomic size)
Q 26. )KXG QPG YQTF QT C RJTCUG HQT VJG HQNNQYKPI UVCVGOGPV [ICSE 2018]
The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged
KQP