11242 + Mcqs in Chemistry Page 62 McqOptions

3051.	Metallurgy is the process of [MP PET 2001]
A.	Concentrating the ore
B.	Roasting the ore
C.	Extracting the metal from the ore
D.	Adding carbon to the ore in blast furnace
Answer» D. Adding carbon to the ore in blast furnace

Discussion

3052.	Cinnabar is an ore of [DPMT 1982, 84; CBSE PMT 1991; MNR 1986; CPMT 1973, 76, 78, 79, 86, 89, 94; UPSEAT 1999]
A.	\[Hg\]
B.	\[Cu\]
C.	\[Pb\]
D.	\[Zn\]
Answer» B. \[Cu\]

Discussion

3053.	Metal which can be extracted from all the three dolomite, magnesite and carnallite is [MP PET 1985]
A.	\[Na\]
B.	\[K\]
C.	\[Mg\]
D.	\[Ca\]
Answer» D. \[Ca\]

Discussion

3054.	The salt which is least likely to be found in minerals is [DPMT 1984]
A.	Chloride
B.	Sulphate
C.	Sulphide
D.	Nitrate
Answer» E.

Discussion

3055.	Carnellite is a mineral of [CBSE PMT 1988; DPMT 1983; AMU 1999]
A.	\[Ca\]
B.	\[Na\]
C.	\[Mg\]
D.	\[Zn\]
Answer» D. \[Zn\]

Discussion

3056.	The \[_{6}{{C}^{14}}\] in upper atmosphere is generated by the nuclear reaction [MP PET 1993]
A.	\[_{7}{{N}^{14}}+{{\ }_{1}}{{H}^{1}}\xrightarrow{{}}{{\ }_{6}}{{C}^{14}}+{{\ }_{+1}}{{e}^{0}}+{{\ }_{1}}{{H}^{1}}\]
B.	\[_{7}{{N}^{14}}\xrightarrow{{}}{{\ }_{6}}{{C}^{14}}+{{\ }_{+1}}{{e}^{0}}\]
C.	\[_{7}{{N}^{14}}+{{\ }_{0}}{{n}^{1}}\xrightarrow{{}}{{\ }_{6}}{{C}^{14}}+{{\ }_{1}}{{H}^{1}}\]
D.	\[_{7}{{N}^{14}}+{{\ }_{1}}{{H}^{3}}+{{\ }_{0}}{{n}^{1}}\xrightarrow{{}}{{\ }_{6}}{{C}^{14}}+{{\ }_{2}}H{{e}^{4}}\]
Answer» D. \[_{7}{{N}^{14}}+{{\ }_{1}}{{H}^{3}}+{{\ }_{0}}{{n}^{1}}\xrightarrow{{}}{{\ }_{6}}{{C}^{14}}+{{\ }_{2}}H{{e}^{4}}\]

Discussion

3057.	In the reaction \[_{3}L{{i}^{6}}+(?)\to {{\ }_{2}}H{{e}^{4}}+{{\ }_{1}}{{H}^{3}}\]. The missing particle is [CPMT 1983, 84]
A.	Electron
B.	Neutron
C.	Proton
D.	Deutron
Answer» C. Proton

Discussion

3058.	Meson was discovered [MH CET 2004]
A.	Yukawa
B.	Austin
C.	Moseley
D.	Einstein
Answer» B. Austin

Discussion

3059.	An element \[_{96}{{X}^{227}}\] emits \[4\alpha \] and \[5\beta \] particles to form new element Y. Then atomic number and mass number of Y are [MH CET 2002]
A.	93; 211
B.	211; 93
C.	212; 88
D.	88; 211
Answer» B. 211; 93

Discussion

3060.	\[_{Z}{{X}^{M}}{{+}_{2}}H{{e}^{4}}{{\to }_{15}}{{P}^{30}}{{+}_{0}}{{n}^{1}}\]. Then [KCET 2002]
A.	\[Z=12,\,\,M=27\]
B.	\[Z=13,\,\,M=27\]
C.	\[Z=12,\,\,M=17\]
D.	\[Z=13,\,\,M=28\]
Answer» C. \[Z=12,\,\,M=17\]

Discussion

3061.	For the nuclear reaction, \[_{12}^{24}Mg+{{\,}_{1}}{{D}^{2}}\to \alpha +?\], the missing nucleide is [Kurukshetra CEE 2002]
A.	\[_{11}^{22}Na\]
B.	\[_{11}^{23}Na\]
C.	\[_{12}^{23}Mg\]
D.	\[_{12}^{26}Mg\]
Answer» B. \[_{11}^{23}Na\]

Discussion

3062.	Which one out of the following statements is not correct for ortho and para hydrogen [Orissa JEE 2002]
A.	They have different boiling point
B.	Ortho form is more stable than para form
C.	They differ in the spin of their protons
D.	The ratio of ortho to para hydrogen increases with increase in temperature and finally pure ortho form is obtained
Answer» E.

Discussion

3063.	In the following reaction, \[x\] will be \[_{29}C{{u}^{64}}{{\to }_{28}}N{{i}^{64}}+x\]
A.	A proton
B.	An electron
C.	A neutron
D.	A positron
Answer» E.

Discussion

3064.	Which of the following is the heaviest metal [MH CET 2001]
A.	Hg
B.	Pb
C.	Ra
D.	U
Answer» E.

Discussion

3065.	Nuclear reactivity of Na and \[N{{a}^{+}}\] is same because both have [Pb. PMT 2000]
A.	Same electron and proton
B.	Same proton and same neutron
C.	Different electron and proton
D.	Different proton and neutron
Answer» C. Different electron and proton

Discussion

3066.	Which of the following does not contain number of neutrons equal to that of \[_{18}^{40}Ar\] [MP PMT 2000]
A.	\[_{19}^{41}K\]
B.	\[_{21}^{43}Sc\]
C.	\[_{21}^{40}Sc\]
D.	\[_{20}^{42}Ca\]
Answer» D. \[_{20}^{42}Ca\]

Discussion

3067.	Positron has nearly the same weight as that of [NCERT 1975; JIPMER 1991; BHU 1995]
A.	\[\alpha \]-particle
B.	Proton
C.	Neutron
D.	Electron
Answer» E.

Discussion

3068.	In the reaction, \[Po\xrightarrow{-\alpha }Pb\xrightarrow{-\beta }Bi,\,\] if Bi, belongs to group 15, to which Po belongs [DCE 2000]
A.	14
B.	15
C.	13
D.	16
Answer» E.

Discussion

3069.	In the nuclear reaction \[_{4}^{9}Be(p,\,\alpha )\,X,\] the X is [MP PMT 2000]
A.	\[_{2}^{4}He\]
B.	\[_{3}^{6}Li\]
C.	\[_{3}^{7}Li\]
D.	\[_{4}^{8}Be\]
Answer» C. \[_{3}^{7}Li\]

Discussion

3070.	Electromagnetic radiation with maximum wave length is [DCE 2000; UPSEAT 2000]
A.	Ultraviolet ray
B.	Radiowave
C.	X-ray
D.	Infrared
Answer» C. X-ray

Discussion

3071.	Which of the following sub-atomic particles is not present in an atom [JIPMER 1999]
A.	Neutron
B.	Proton
C.	Electron
D.	Positron
Answer» E.

Discussion

3072.	Which of the following particle is emitted in the reaction \[_{13}A{{l}^{27}}{{+}_{2}}H{{e}^{4}}{{\to }_{14}}{{P}^{30}}+.....\] [DCE 1999]
A.	\[_{0}{{n}^{1}}\]
B.	\[_{-1}{{e}^{0}}\]
C.	\[_{1}{{H}^{1}}\]
D.	\[_{1}{{H}^{2}}\]
Answer» D. \[_{1}{{H}^{2}}\]

Discussion

3073.	Which of the following atomic mass of uranium is the most radioactive [AFMC 1997]
A.	238
B.	235
C.	226
D.	248
Answer» C. 226

Discussion

3074.	In equation \[_{11}N{{a}^{23}}{{+}_{1}}{{H}^{1}}{{\to }_{12}}M{{g}^{23}}+x\], \[x\] represents [MP PMT 1990; MP PET 1999]
A.	Neutron
B.	Deutron
C.	\[\alpha \]-particle
D.	Positron
Answer» B. Deutron

Discussion

3075.	In a nuclear explosion, the energy is released in the form of [CPMT 1994]
A.	Kinetic energy
B.	Electrical energy
C.	Potential energy
D.	None of these
Answer» E.

Discussion

3076.	How many neutrons are present in the nucleus of \[Ra\] [CPMT 1980]
A.	88
B.	226
C.	140
D.	138
Answer» E.

Discussion

3077.	The positron is discovered by [RPMT 1997]
A.	Pauling
B.	Anderson
C.	Yukawa
D.	Segar
Answer» C. Yukawa

Discussion

3078.	The nucleus of an atom is made up of X protons and Y neutrons. For the most stable and abundant nuclei [NCERT 1980]
A.	X and Y are both even
B.	X and Y are both odd
C.	X is even and Y is odd
D.	X is odd and Y is even
Answer» B. X and Y are both odd

Discussion

3079.	The positron is [AFMC 1997]
A.	\[_{-1}{{e}^{0}}\]
B.	\[_{+1}{{e}^{0}}\]
C.	\[_{1}{{H}^{1}}\]
D.	\[_{0}{{n}^{1}}\]
Answer» C. \[_{1}{{H}^{1}}\]

Discussion

3080.	Which of the following is the most stable atom [AFMC 1997]
A.	\[Bi\]
B.	\[Al\]
C.	\[U\]
D.	\[Pb\]
Answer» E.

Discussion

3081.	Formation of nucleus from its nucleons is accompanied by [NCERT 1975; RPET 2000]
A.	Decrease in mass
B.	Increase in mass
C.	No change of mass
D.	None of them
Answer» B. Increase in mass

Discussion

3082.	Which one of the following nuclear reaction is correct [CPMT 1997]
A.	\[_{6}{{C}^{13}}{{+}_{1}}{{H}^{1}}{{\to }_{7}}{{N}^{13}}+{{\beta }^{-}}+{{v}^{-}}\]
B.	\[_{11}N{{a}^{23}}{{+}_{1}}{{H}^{1}}\to {{\ }_{10}}N{{e}^{20}}+{{\ }_{2}}H{{e}^{4}}\]
C.	\[_{13}A{{l}^{23}}+{{\ }_{0}}{{n}^{1}}\to {{\ }_{11}}N{{a}^{23}}+{{e}^{0}}\]
D.	None of these
Answer» C. \[_{13}A{{l}^{23}}+{{\ }_{0}}{{n}^{1}}\to {{\ }_{11}}N{{a}^{23}}+{{e}^{0}}\]

Discussion

3083.	Neutrino has [NCERT 1981]
A.	Charge +1, mass 1
B.	Charge 0, mass 0
C.	Charge ? 1, mass 1
D.	Charge 0 , mass 1
Answer» C. Charge ? 1, mass 1

Discussion

3084.	Stable nuclides are those whose n/p ratio is [MP PMT 1993]
A.	\[n/p=1\]
B.	\[n/p=2\]
C.	\[n/p>1\]
D.	\[n/p<1\]
Answer» B. \[n/p=2\]

Discussion

3085.	On bombarding \[_{7}{{N}^{14}}\] with \[\alpha \]-particles, the nuclei of the product formed after the release of a proton will be or In nuclear reaction \[_{7}{{N}^{14}}+{{\,}_{2}}H{{e}^{4}}{{\to }_{Z}}{{X}^{A}}{{+}_{1}}{{H}^{1}}\], the term \[_{Z}{{X}^{A}}\] represents [NCERT 1979; MP PMT 1989; MNR 1995; MP PET 1996; BHU 1996]
A.	\[_{8}{{O}^{17}}\]
B.	\[_{9}{{F}^{18}}\]
C.	\[_{9}{{F}^{17}}\]
D.	\[_{8}{{O}^{18}}\]
Answer» B. \[_{9}{{F}^{18}}\]

Discussion

3086.	\[X\xrightarrow{-\alpha }Y\xrightarrow{-\beta }Z\xrightarrow{-\beta }W\] In the above sequence of reaction, the elements which are isotopes of each other are [JIPMER 1997]
A.	\[X\] and \[W\]
B.	\[Y\] and \[Z\]
C.	\[X\] and \[Z\]
D.	None of these
Answer» B. \[Y\] and \[Z\]

Discussion

3087.	In terms of energy 1 a. m.u. is equal to [MP PET/PMT 1998]
A.	100 J
B.	931.1 MeV
C.	931.1 kcal
D.	\[{{10}^{7}}\]erg
Answer» C. 931.1 kcal

Discussion

3088.	Positron is [AIIMS 1997]
A.	Electron with +ve charge
B.	A helium nucleus
C.	A nucleus with two protons
D.	A nucleus with one neutron and one proton
Answer» B. A helium nucleus

Discussion

3089.	The composition of tritium (\[_{1}{{H}^{3}}\]) is [Manipal MEE 1995; DPMT 1982,96]
A.	1 electron, 1 proton, 1 neutron
B.	1 electron, 2 protons, 1 neutron
C.	1 electron, 1 proton, 2 neutrons
D.	1 electron, 1 proton, 3 neutrons
Answer» D. 1 electron, 1 proton, 3 neutrons

Discussion

3090.	The introduction of a neutron into the nuclear composition of an atom would lead to a change in [MNR 1995]
A.	The number of the electrons also
B.	The chemical nature of the atom
C.	Its atomic number
D.	Its atomic weight
Answer» E.

Discussion

3091.	In the sequence of following nuclear reactions \[_{92}{{X}^{238}}\xrightarrow{-\alpha }Y\xrightarrow{-\beta }Z\xrightarrow{-\beta }L{{\xrightarrow{-n\alpha }}_{84}}{{M}^{218}}\] The value of \[n\] will be [MP PMT 1999]
A.	3
B.	4
C.	5
D.	6
Answer» C. 5

Discussion

3092.	Which one of the following statements is incorrect [MP PET 1997]
A.	Mass defect is related with binding energy
B.	?Meson? was discovered by Yukawa
C.	The size of the nucleus is of the order of \[{{10}^{-12}}-{{10}^{-13}}cm\]
D.	Magnetic quantum number is a measure of ?orbital angular momentum? of the electron
Answer» E.

Discussion

3093.	The atomic mass of lead is 208 and atomic number is 82. The atomic mass of bismuth is 209 and atomic number is 83. The ratio of n/p in the atom is [EAMCET 1982]
A.	Higher of lead
B.	Higher of bismuth
C.	Same
D.	None of these
Answer» B. Higher of bismuth

Discussion

3094.	The nucleus of radioactive element possesses
A.	Low binding energy
B.	High binding energy
C.	Zero binding energy
D.	High potential energy
Answer» B. High binding energy

Discussion

3095.	In the carbon cycle, from which hot stars obtain their energy, the \[_{6}{{C}^{14}}\] nucleus is
A.	Completely converted into energy
B.	Regenerated at the end of the cycle
C.	Combined with oxygen to form carbon monoxide
D.	Broken up into its constituents protons and neutrons
Answer» C. Combined with oxygen to form carbon monoxide

Discussion

3096.	According to the nuclear reaction \[_{4}Be{{+}_{2}}H{{e}^{4}}{{\to }_{6}}{{C}^{12}}{{+}_{0}}n{{}^{1}}\], mass number of \[(Be)\] atom is [AFMC 2002]
A.	4
B.	9
C.	7
D.	6
Answer» C. 7

Discussion

3097.	What is X in the following nuclear reaction \[_{7}{{N}^{14}}+{{\ }_{1}}{{H}^{1}}{{\xrightarrow{{}}}_{8}}{{O}^{15}}+X\] [AIIMS 1983; MP PET 1997]
A.	\[_{+1}{{e}^{0}}\]
B.	\[_{0}{{n}^{1}}\]
C.	\[\gamma \]
D.	\[_{-1}{{e}^{0}}\]
Answer» D. \[_{-1}{{e}^{0}}\]

Discussion

3098.	In the reaction \[_{93}N{{p}^{239}}{{\xrightarrow{{}}}_{94}}P{{u}^{239}}\] + (?), the missing particle is [MNR 1987]
A.	Proton
B.	Positron
C.	Electron
D.	Neutron
Answer» D. Neutron

Discussion

3099.	Which one of the following nuclear transformation is (n, p ) type [AIIMS 1980, 83]
A.	\[_{3}L{{i}^{7}}+{{\,}_{1}}{{H}^{1}}\xrightarrow{{}}{{\,}_{4}}B{{e}^{7}}+{{\,}_{0}}{{n}^{1}}\]
B.	\[_{33}A{{s}^{75}}+{{\,}_{2}}H{{e}^{4}}\xrightarrow{{}}{{\,}_{35}}B{{r}^{78}}+{{\,}_{0}}{{n}^{1}}\]
C.	\[_{83}B{{i}^{209}}+{{\,}_{1}}{{H}^{2}}\xrightarrow{{}}{{\,}_{84}}P{{o}^{210}}+{{\,}_{0}}{{n}^{1}}\]
D.	\[_{21}S{{c}^{45}}+{{\,}_{0}}{{n}^{1}}\xrightarrow{{}}{{\,}_{20}}C{{a}^{45}}+{{\,}_{1}}{{H}^{1}}\]
Answer» E.

Discussion

3100.	In the nuclear reaction \[_{92}{{U}^{238}}{{\to }_{82}}P{{b}^{206}}+x{{\,}_{2}}H{{e}^{4}}+y{{\,}_{-1}}{{\beta }^{0}}\] the value of x and y are respectively ??.. [Orissa JEE 2002]
A.	8, 6
B.	6, 4
C.	6, 8
D.	8, 10
Answer» B. 6, 4

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Metallurgy is the process of [MP PET 2001]

Cinnabar is an ore of [DPMT 1982, 84; CBSE PMT 1991; MNR 1986; CPMT 1973, 76, 78, 79, 86, 89, 94; UPSEAT 1999]

Metal which can be extracted from all the three dolomite, magnesite and carnallite is [MP PET 1985]

The salt which is least likely to be found in minerals is [DPMT 1984]

Carnellite is a mineral of [CBSE PMT 1988; DPMT 1983; AMU 1999]

The \[_{6}{{C}^{14}}\] in upper atmosphere is generated by the nuclear reaction [MP PET 1993]

In the reaction \[_{3}L{{i}^{6}}+(?)\to {{\ }_{2}}H{{e}^{4}}+{{\ }_{1}}{{H}^{3}}\]. The missing particle is [CPMT 1983, 84]

Meson was discovered [MH CET 2004]

An element \[_{96}{{X}^{227}}\] emits \[4\alpha \] and \[5\beta \] particles to form new element Y. Then atomic number and mass number of Y are [MH CET 2002]

\[_{Z}{{X}^{M}}{{+}_{2}}H{{e}^{4}}{{\to }_{15}}{{P}^{30}}{{+}_{0}}{{n}^{1}}\]. Then [KCET 2002]

For the nuclear reaction, \[_{12}^{24}Mg+{{\,}_{1}}{{D}^{2}}\to \alpha +?\], the missing nucleide is [Kurukshetra CEE 2002]

Which one out of the following statements is not correct for ortho and para hydrogen [Orissa JEE 2002]

In the following reaction, \[x\] will be \[_{29}C{{u}^{64}}{{\to }_{28}}N{{i}^{64}}+x\]

Which of the following is the heaviest metal [MH CET 2001]

Nuclear reactivity of Na and \[N{{a}^{+}}\] is same because both have [Pb. PMT 2000]

Which of the following does not contain number of neutrons equal to that of \[_{18}^{40}Ar\] [MP PMT 2000]

Positron has nearly the same weight as that of [NCERT 1975; JIPMER 1991; BHU 1995]

In the reaction, \[Po\xrightarrow{-\alpha }Pb\xrightarrow{-\beta }Bi,\,\] if Bi, belongs to group 15, to which Po belongs [DCE 2000]

In the nuclear reaction \[_{4}^{9}Be(p,\,\alpha )\,X,\] the X is [MP PMT 2000]

Electromagnetic radiation with maximum wave length is [DCE 2000; UPSEAT 2000]

Which of the following sub-atomic particles is not present in an atom [JIPMER 1999]

Which of the following particle is emitted in the reaction \[_{13}A{{l}^{27}}{{+}_{2}}H{{e}^{4}}{{\to }_{14}}{{P}^{30}}+.....\] [DCE 1999]

Which of the following atomic mass of uranium is the most radioactive [AFMC 1997]

In equation \[_{11}N{{a}^{23}}{{+}_{1}}{{H}^{1}}{{\to }_{12}}M{{g}^{23}}+x\], \[x\] represents [MP PMT 1990; MP PET 1999]

In a nuclear explosion, the energy is released in the form of [CPMT 1994]

How many neutrons are present in the nucleus of \[Ra\] [CPMT 1980]

The positron is discovered by [RPMT 1997]

The nucleus of an atom is made up of X protons and Y neutrons. For the most stable and abundant nuclei [NCERT 1980]

The positron is [AFMC 1997]

Which of the following is the most stable atom [AFMC 1997]

Formation of nucleus from its nucleons is accompanied by [NCERT 1975; RPET 2000]

Which one of the following nuclear reaction is correct [CPMT 1997]

Neutrino has [NCERT 1981]

Stable nuclides are those whose n/p ratio is [MP PMT 1993]

\[X\xrightarrow{-\alpha }Y\xrightarrow{-\beta }Z\xrightarrow{-\beta }W\] In the above sequence of reaction, the elements which are isotopes of each other are [JIPMER 1997]

In terms of energy 1 a. m.u. is equal to [MP PET/PMT 1998]

Positron is [AIIMS 1997]

The composition of tritium (\[_{1}{{H}^{3}}\]) is [Manipal MEE 1995; DPMT 1982,96]

The introduction of a neutron into the nuclear composition of an atom would lead to a change in [MNR 1995]

In the sequence of following nuclear reactions \[_{92}{{X}^{238}}\xrightarrow{-\alpha }Y\xrightarrow{-\beta }Z\xrightarrow{-\beta }L{{\xrightarrow{-n\alpha }}_{84}}{{M}^{218}}\] The value of \[n\] will be [MP PMT 1999]

Which one of the following statements is incorrect [MP PET 1997]

The atomic mass of lead is 208 and atomic number is 82. The atomic mass of bismuth is 209 and atomic number is 83. The ratio of n/p in the atom is [EAMCET 1982]

The nucleus of radioactive element possesses

In the carbon cycle, from which hot stars obtain their energy, the \[_{6}{{C}^{14}}\] nucleus is

According to the nuclear reaction \[_{4}Be{{+}_{2}}H{{e}^{4}}{{\to }_{6}}{{C}^{12}}{{+}_{0}}n{{}^{1}}\], mass number of \[(Be)\] atom is [AFMC 2002]

What is X in the following nuclear reaction \[_{7}{{N}^{14}}+{{\ }_{1}}{{H}^{1}}{{\xrightarrow{{}}}_{8}}{{O}^{15}}+X\] [AIIMS 1983; MP PET 1997]

In the reaction \[_{93}N{{p}^{239}}{{\xrightarrow{{}}}_{94}}P{{u}^{239}}\] + (?), the missing particle is [MNR 1987]

Which one of the following nuclear transformation is (n, p ) type [AIIMS 1980, 83]

In the nuclear reaction \[_{92}{{U}^{238}}{{\to }_{82}}P{{b}^{206}}+x{{\,}_{2}}H{{e}^{4}}+y{{\,}_{-1}}{{\beta }^{0}}\] the value of x and y are respectively ??.. [Orissa JEE 2002]