31 + Mcqs in Atomic Structure Page 1 McqOptions

1.	Beam of electrons can be produced with help of
A.	anode-ray tube
B.	cathode-ray tube
C.	inert-ray tube
D.	bi-charged-ray tube
Answer» C. inert-ray tube

Discussion

2.	Oxidation number of S in SCl2 is
A.	+2
B.	+3
C.	+4
D.	+5
Answer» B. +3

Discussion

3.	Raw material required for production of sulfuric acid is
A.	sulfur
B.	air
C.	water
D.	all of them
Answer» E.

Discussion

4.	Each carbon atom forms four covalent bonds with other carbon atoms arranging them tetrahedral in
A.	graphite
B.	diamond
C.	silicon
D.	brass
Answer» C. silicon

Discussion

5.	Electrical conductivity of calcium is much higher than any
A.	transition element
B.	noble gas
C.	alkali
D.	acids
Answer» B. noble gas

Discussion

6.	Formula of benzene is
A.	C6H6
B.	C2H6
C.	C6H12
D.	CH
Answer» B. C2H6

Discussion

7.	Rate of reaction is change in amount of reactants or products in specific
A.	volume
B.	density
C.	time
D.	area
Answer» D. area

Discussion

8.	Decolorisation of bromine water will occur, on mixing it with
A.	ethene
B.	benzene
C.	propene
D.	butene
Answer» B. benzene

Discussion

9.	Number of atoms in same element has same number of
A.	protons
B.	electrons
C.	neutrons
D.	All of Above
Answer» B. electrons

Discussion

10.	Every substance in our world is made up of
A.	matter
B.	electrons
C.	protons
D.	chemical elements
Answer» E.

Discussion

11.	1.6x10-19C is charge on single
A.	electron (e-)
B.	proton (p+)
C.	neutron (n0)
D.	positron (e+)
Answer» B. proton (p+)

Discussion

12.	Atomic number is number of
A.	protons (p+)
B.	electrons (e-)
C.	neutrons (n0)
D.	nucleons (p+ and n0)
Answer» B. electrons (e-)

Discussion

13.	Number of times a p+ is heavier than an e- is
A.	18 times
B.	184 times
C.	200 times
D.	1840 times
Answer» E.

Discussion

14.	In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom. [CBSE AIPMT 2002]
A.	+ 3.4 eV
B.	+ 6.8 eV
C.	– 13.6 eV
D.	+ 13.6 eV
Answer» B. + 6.8 eV

Discussion

15.	The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately (Planck's constant h = 6.63 × 10–34 Js] [AIEEE 2003]
A.	10–33 metre
B.	10–31 metre
C.	10–16 metre
D.	10–25 metre
Answer» B. 10–31 metre

Discussion

16.	Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively: [AIEEE 2004]
A.	12 and 4
B.	12 and 5
C.	16 and 4
D.	16 and 5
Answer» C. 16 and 4

Discussion

17.	Which one of the following sets of ions represents a collection of isoelectronic species? [AIEEE 2006]
A.	K+, Cl–, Ca2+, Sc3+
B.	Ba2+, Sr2+, K+, S2–
C.	N3–, O2–, F–, S2–N3–, O2–, F–, S2–
D.	Li+, Na+, Mg2+, Ca2+
Answer» B. Ba2+, Sr2+, K+, S2–

Discussion

18.	Mg2+ is isoelectronic with [Karnataka CET 2007]
A.	Ca2+
B.	Na+
C.	Zn2+
D.	Cu2+
Answer» C. Zn2+

Discussion

19.	Ionisation energy of He+ is 19.6 ´ 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is [AIEEE 2010]
A.	4.41 ´ 10–16 J atom–1
B.	–4.41 ´ 10–17 J atom–1
C.	–2.2 ´ 10–15 J atom–1
D.	8.82 ´ 10–17 J atom–1
Answer» C. –2.2 ´ 10–15 J atom–1

Discussion

20.	The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is   (c = 3 ´ 108 ms–1 and NA = 6.02 ´ 1023 mol–1) [AIEEE 2010]
A.	594 nm
B.	640 nm
C.	700 nm
D.	494 nm
Answer» E.

Discussion

21.	The electronic transitions from n = 2 to n = 1 will produce shortest wavelength in (where n = principal quantum state) [West Bengal JEE 2011]
A.	Li+2
B.	He+
C.	H
D.	H+
Answer» B. He+

Discussion

22.	The energy of an electron in first Bohr orbit of H-atom is –13.6 eV. The possible energy value of electron in the excited state of Li2+ is [West Bengal JEE 2011]
A.	– 122.4 eV
B.	30.6 eV
C.	– 30.6 eV
D.	13.6 eV
Answer» D. 13.6 eV

Discussion

23.	A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at: [AIEEE 2011]A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at: [AIEEE 2011]
A.	518 nm
B.	1035 nm
C.	325 nm
D.	743 nm
Answer» E.

Discussion

24.	The work function (f) of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is [IIT JEE 2011]   Metal Li Na K Mg Cu Ag Fe Pt W f(eV) 2.4 2.3 2.2 3.7 4.8 4.3 4.7 6.3 4.75
A.	4
B.	6
C.	8
D.	12
Answer» B. 6

Discussion

25.	Identify the wrong statement in the following [CBSE AIPMT 2012]
A.	Atomic radius of the elements increases as one moves down the first group of the periodic table
B.	Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the
C.	Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
D.	Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius
Answer» D. Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

Discussion

26.	The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is [CBSE AIPMT 2012]
A.	5, 0, 0, + 1/2
B.	5, 1, 0, +1/2
C.	5, 1, 1, +1/2
D.	6, 0, 0, + 1/2
Answer» B. 5, 1, 0, +1/2

Discussion

27.	Maximum number of electrons in a subshell with l = 3 and n = 4 is [CBSE AIPMT 2012]
A.	10
B.	12
C.	14
D.	16
Answer» D. 16

Discussion

28.	The total number of nucleons in the nucleus is called _________
A.	Atomic number
B.	Mass number
C.	Electric charge
D.	Periodic number
Answer» C. Electric charge

Discussion

29.	Number of protons in the nucleus is called ___________
A.	Atomic number
B.	Mass number
C.	Electric charge
D.	Periodic number
Answer» B. Mass number

Discussion

30.	Nucleus consists of two sub-particles known as?
A.	Nucleotides
B.	Nucleons
C.	Neutrons
D.	Nucleosides
Answer» C. Neutrons

Discussion

31.	What is the most attractive part of nuclear energy?
A.	Supports countries development
B.	Causes no pollution
C.	Has high efficiency of energy production
D.	Is available in abundance
Answer» C. Has high efficiency of energy production

Discussion

Explore topic-wise MCQs in VITEEE.

&nbsp;Beam&nbsp;of&nbsp;electrons&nbsp;can&nbsp;be&nbsp;produced&nbsp;with&nbsp;help&nbsp;of

Oxidation&nbsp;number&nbsp;of&nbsp;S&nbsp;in&nbsp;SCl2&nbsp;is

Raw&nbsp;material&nbsp;required&nbsp;for&nbsp;production&nbsp;of&nbsp;sulfuric&nbsp;acid&nbsp;is

Each&nbsp;carbon&nbsp;atom&nbsp;forms&nbsp;four&nbsp;covalent&nbsp;bonds&nbsp;with&nbsp;other&nbsp;carbon&nbsp;atoms&nbsp;arranging&nbsp;them&nbsp;tetrahedral&nbsp;in

Electrical&nbsp;conductivity&nbsp;of&nbsp;calcium&nbsp;is&nbsp;much&nbsp;higher&nbsp;than&nbsp;any

&nbsp;Formula&nbsp;of&nbsp;benzene&nbsp;is

Rate&nbsp;of&nbsp;reaction&nbsp;is&nbsp;change&nbsp;in&nbsp;amount&nbsp;of&nbsp;reactants&nbsp;or&nbsp;products&nbsp;in&nbsp;specific

Decolorisation&nbsp;of&nbsp;bromine&nbsp;water&nbsp;will&nbsp;occur,&nbsp;on&nbsp;mixing&nbsp;it&nbsp;with

&nbsp;Number&nbsp;of&nbsp;atoms&nbsp;in&nbsp;same&nbsp;element&nbsp;has&nbsp;same&nbsp;number&nbsp;of

Every&nbsp;substance&nbsp;in&nbsp;our&nbsp;world&nbsp;is&nbsp;made&nbsp;up&nbsp;of

1.6x10-19C&nbsp;is&nbsp;charge&nbsp;on&nbsp;single

Atomic&nbsp;number&nbsp;is&nbsp;number&nbsp;of

&nbsp;Number&nbsp;of&nbsp;times&nbsp;a&nbsp;p+&nbsp;is&nbsp;heavier&nbsp;than&nbsp;an&nbsp;e-&nbsp;is

In&nbsp;Hydrogen&nbsp;atom,&nbsp;energy&nbsp;of&nbsp;first&nbsp;excited&nbsp;state&nbsp;is&nbsp;&ndash;&nbsp;3.4&nbsp;eV.&nbsp;Then&nbsp;find&nbsp;out&nbsp;KE&nbsp;of&nbsp;same&nbsp;orbit&nbsp;of&nbsp;Hydrogen&nbsp;atom.&nbsp;[CBSE&nbsp;AIPMT&nbsp;2002]

Consider&nbsp;the&nbsp;ground&nbsp;state&nbsp;of&nbsp;Cr&nbsp;atom&nbsp;(Z&nbsp;=&nbsp;24).&nbsp;The&nbsp;numbers&nbsp;of&nbsp;electrons&nbsp;with&nbsp;the&nbsp;azimuthal&nbsp;quantum&nbsp;numbers,&nbsp;l&nbsp;=&nbsp;1&nbsp;and&nbsp;2&nbsp;are,&nbsp;respectively:&nbsp;[AIEEE&nbsp;2004]

Which&nbsp;one&nbsp;of&nbsp;the&nbsp;following&nbsp;sets&nbsp;of&nbsp;ions&nbsp;represents&nbsp;a&nbsp;collection&nbsp;of&nbsp;isoelectronic&nbsp;species?&nbsp;[AIEEE&nbsp;2006]

Mg2+&nbsp;is&nbsp;isoelectronic&nbsp;with&nbsp;[Karnataka&nbsp;CET&nbsp;2007]

Ionisation&nbsp;energy&nbsp;of&nbsp;He+&nbsp;is&nbsp;19.6&nbsp;&acute;&nbsp;10&ndash;18&nbsp;J&nbsp;atom&ndash;1.&nbsp;The&nbsp;energy&nbsp;of&nbsp;the&nbsp;first&nbsp;stationary&nbsp;state&nbsp;(n&nbsp;=&nbsp;1)&nbsp;of&nbsp;Li2+&nbsp;is&nbsp;[AIEEE&nbsp;2010]

The&nbsp;electronic&nbsp;transitions&nbsp;from&nbsp;n&nbsp;=&nbsp;2&nbsp;to&nbsp;n&nbsp;=&nbsp;1&nbsp;will&nbsp;produce&nbsp;shortest&nbsp;wavelength&nbsp;in&nbsp;(where&nbsp;n&nbsp;=&nbsp;principal&nbsp;quantum&nbsp;state)&nbsp;[West&nbsp;Bengal&nbsp;JEE&nbsp;2011]

Identify&nbsp;the&nbsp;wrong&nbsp;statement&nbsp;in&nbsp;the&nbsp;following&nbsp;[CBSE&nbsp;AIPMT&nbsp;2012]

The&nbsp;correct&nbsp;set&nbsp;of&nbsp;four&nbsp;quantum&nbsp;numbers&nbsp;for&nbsp;the&nbsp;valence&nbsp;electron&nbsp;of&nbsp;rubidium&nbsp;atom&nbsp;(Z&nbsp;=&nbsp;37)&nbsp;is&nbsp;[CBSE&nbsp;AIPMT&nbsp;2012]

Maximum&nbsp;number&nbsp;of&nbsp;electrons&nbsp;in&nbsp;a&nbsp;subshell&nbsp;with&nbsp;l&nbsp;=&nbsp;3&nbsp;and&nbsp;n&nbsp;=&nbsp;4&nbsp;is&nbsp;[CBSE&nbsp;AIPMT&nbsp;2012]

&nbsp;The&nbsp;total&nbsp;number&nbsp;of&nbsp;nucleons&nbsp;in&nbsp;the&nbsp;nucleus&nbsp;is&nbsp;called&nbsp;_________

Number&nbsp;of&nbsp;protons&nbsp;in&nbsp;the&nbsp;nucleus&nbsp;is&nbsp;called&nbsp;___________

Nucleus&nbsp;consists&nbsp;of&nbsp;two&nbsp;sub-particles&nbsp;known&nbsp;as?

What&nbsp;is&nbsp;the&nbsp;most&nbsp;attractive&nbsp;part&nbsp;of&nbsp;nuclear&nbsp;energy?

Beam of electrons can be produced with help of

Oxidation number of S in SCl2 is

Raw material required for production of sulfuric acid is

Each carbon atom forms four covalent bonds with other carbon atoms arranging them tetrahedral in

Electrical conductivity of calcium is much higher than any

Formula of benzene is

Rate of reaction is change in amount of reactants or products in specific

Decolorisation of bromine water will occur, on mixing it with

Number of atoms in same element has same number of

Every substance in our world is made up of

1.6x10-19C is charge on single

Atomic number is number of

Number of times a p+ is heavier than an e- is

In Hydrogen atom, energy of first excited state is – 3.4 eV. Then find out KE of same orbit of Hydrogen atom. [CBSE AIPMT 2002]

Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively: [AIEEE 2004]

Which one of the following sets of ions represents a collection of isoelectronic species? [AIEEE 2006]

Mg2+ is isoelectronic with [Karnataka CET 2007]

Ionisation energy of He+ is 19.6 ´ 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is [AIEEE 2010]

The electronic transitions from n = 2 to n = 1 will produce shortest wavelength in (where n = principal quantum state) [West Bengal JEE 2011]

Identify the wrong statement in the following [CBSE AIPMT 2012]

The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is [CBSE AIPMT 2012]

Maximum number of electrons in a subshell with l = 3 and n = 4 is [CBSE AIPMT 2012]

The total number of nucleons in the nucleus is called _________

Number of protons in the nucleus is called ___________

Nucleus consists of two sub-particles known as?

What is the most attractive part of nuclear energy?