-
question_answer1)
According to the Dalton's atomic theory all matter is made of tiny particles called ________.
A)
Molecules done
clear
B)
Moles done
clear
C)
Atoms done
clear
D)
Elements done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer2)
Which of the following is incorrect statement for the atoms?
A)
Nucleus of an atom is made up of protons and neutrons. done
clear
B)
Atoms are made up of electrons, protons and neutrons. done
clear
C)
Atoms are very tiny particles. done
clear
D)
Atoms of different elements have same chemical properties. done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer3)
Calculate the number of moles for the 84 g of He.
A)
42 done
clear
B)
21 done
clear
C)
84 done
clear
D)
24 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer4)
What is the full form of IUPAC?
A)
International Union of Pure and Applied Chemistry done
clear
B)
International Union Power of Applied Chemistry done
clear
C)
Internal Union of Pure Applied Chemistry done
clear
D)
International Universal Pure and Applied Chemistry done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer5)
Which of the following is a compound?
A)
Sulphur done
clear
B)
Ammonia done
clear
C)
Iron done
clear
D)
Carbon done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer6)
Which of the following is the chemical formula of sodium chloride?
A)
\[C{{l}_{2}}\] done
clear
B)
\[NaCl\] done
clear
C)
\[FeCl\] done
clear
D)
\[CaCl\] done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer7)
Chlorine is a ________ element.
A)
Monoatomic done
clear
B)
Diatomic done
clear
C)
Tetra-atomic done
clear
D)
Polyatomic done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer8)
What is the atomic mass of oxygen?
A)
8 done
clear
B)
16 done
clear
C)
32 done
clear
D)
64 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer9)
What is the molecular mass of\[{{H}_{2}}S{{O}_{4}}\] ?
A)
64 done
clear
B)
98 done
clear
C)
36 done
clear
D)
56 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer10)
Which one of the following is correct about elements?
A)
Elements are consists of one type of atoms. done
clear
B)
Elements are smallest part of a substance. done
clear
C)
All the elements are consists of same type of atoms. done
clear
D)
All the above done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer11)
Maximum number of electrons present in a shell is given by the formula______.
A)
\[2n\] done
clear
B)
\[{{n}^{2}}\] done
clear
C)
\[{{n}^{3}}\] done
clear
D)
\[2{{n}^{2}}\] done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer12)
Which of the following shells can hold maximum number of electrons?
A)
M done
clear
B)
N done
clear
C)
L done
clear
D)
K done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer13)
Select the relation between atomic number, mass number and number of neutrons.
A)
Mass number = atomic number + number of neutrons done
clear
B)
Mass number = atomic number/number of neutrons done
clear
C)
Mass number =atomic number \[\times \] number of neutrons done
clear
D)
Mass number = atomic number - number of neutrons done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer14)
Which one of the following fundamental particles is negatively charged?
A)
Electron done
clear
B)
Proton done
clear
C)
Neutron done
clear
D)
All the above done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer15)
An atom contains 6 protons and 8 neutrons. What should be its atomic number?
A)
14 done
clear
B)
6 done
clear
C)
8 done
clear
D)
2 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer16)
An atom contains 14 protons and 16 neutrons. What is its mass number?
A)
14 done
clear
B)
16 done
clear
C)
30 done
clear
D)
2 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer17)
Which one of the following statements is correct?
Statement 1: Nucleus of an atom is negatively charged. |
Statement 2: Nucleus of an atom consists of protons and neutrons. |
A)
Statement 1 only done
clear
B)
Statement 2 only done
clear
C)
Both statements are correct done
clear
D)
Both statements are incorrect done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer18)
The first energy level or shell is represented by which one of the following letter?
A)
K done
clear
B)
L done
clear
C)
M done
clear
D)
N done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer19)
What is the maximum number of electrons that can be accommodated in the second shell?
A)
2 done
clear
B)
8 done
clear
C)
18 done
clear
D)
26 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer20)
Cathode rays are:
A)
Negatively charged done
clear
B)
Positively charged done
clear
C)
Neutral done
clear
D)
All above done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer21)
16 g of water is equal to ____ moles.
A)
1.2 done
clear
B)
1.9 mol done
clear
C)
0.8 done
clear
D)
8.8 mol done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer22)
Which one of the following was not explained in Rutherford's nuclear model of atom?
A)
An atom consists of tiny positively charged nucleus surrounded by negatively charged electrons. done
clear
B)
Stability of an atom. done
clear
C)
Most of the mass of atom is concentrated in the nucleus. done
clear
D)
The number of electrons and protons are equal in an atom. done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer23)
The number of electrons present in M shell of chlorine is:
A)
8 done
clear
B)
7 done
clear
C)
2 done
clear
D)
18 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer24)
Molar mass of \[{{C}_{2}}{{H}_{4}}\] is:
A)
\[26\,g\,mo{{l}^{-1}}\] done
clear
B)
\[28\,g\,mo{{l}^{-1}}\] done
clear
C)
\[30\,g\ mo{{l}^{-1}}\] done
clear
D)
\[32\,g\,mo{{l}^{-1}}\] done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer25)
Calculate the number of sulphur molecules in a 300 g sample of sulphur \[[{{S}_{8}}].\]
A)
\[7.7\times {{10}^{20}}\,molecules\] done
clear
B)
\[7.05\times {{10}^{23}}\,molecules\] done
clear
C)
\[5.07\times {{10}^{23}}molecules\] done
clear
D)
\[6.023\times {{10}^{23}}\,molecules\] done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer26)
Symbol of nucleus with atomic number 18 and mass number 40 is written as:
A)
\[_{18}^{40}R\] done
clear
B)
\[_{18}^{40}Ar\] done
clear
C)
\[_{40}^{18}Ar\] done
clear
D)
40 Ar 18 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer27)
The mass of \[3.0115\times {{10}^{23}}\] molecules of chlorine is:
A)
35.5 g done
clear
B)
7 g done
clear
C)
78 g done
clear
D)
40 g done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer28)
Number of atoms in 69 g of Na is :
A)
\[1.0\times {{10}^{24}}\] atoms of Na done
clear
B)
\[1.80\times {{10}^{24}}\] atoms of Na done
clear
C)
\[6.023\times {{10}^{24}}\] atoms of Na done
clear
D)
\[1.5\times {{10}^{23}}\] atoms of Na done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer29)
The term ?mole? in chemistry was introduced by who of the following.
A)
Lavosier done
clear
B)
Wilhelm Ostwald done
clear
C)
John Dalton done
clear
D)
Neil Bohr done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer30)
The percentage of sulphur in sulphuric acid is :
A)
40% done
clear
B)
32.6% done
clear
C)
42% done
clear
D)
35% done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer31)
The number of atoms of oxygen present in 24 g of oxygen gas is:
A)
\[5.2\times {{10}^{23}}\] atoms done
clear
B)
\[9.03\times {{10}^{23}}\]atoms done
clear
C)
\[5.8\times {{10}^{24}}\] atoms done
clear
D)
\[9.4\times {{10}^{24}}\]atoms done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer32)
The ratio of C : O by mass in \[C{{O}_{2}}\]is:
A)
8 : 3 done
clear
B)
3 : 8 done
clear
C)
1 : 16 done
clear
D)
16 : 1 done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer33)
Which one of the following is a triatomic molecule?
A)
\[N{{H}_{3}}\] done
clear
B)
\[C{{H}_{4}}\] done
clear
C)
\[{{N}_{2}}\] done
clear
D)
\[N{{O}_{2}}\] done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer34)
Quicklime contains:
A)
Sodium and hydrogen only done
clear
B)
Calcium and oxygen done
clear
C)
Oxygen and hydrogen only done
clear
D)
Potassium and sulphur done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer35)
Calculate the mass of water which contains the same number of molecules as are contained in 60 g of oxygen.
A)
60.8 g done
clear
B)
30.75 g done
clear
C)
33.75 g done
clear
D)
76.5 g done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer36)
Calculate the mass of \[{{H}_{2}}{{O}_{2}}\] contained in \[0.4\] mole of\[{{H}_{2}}{{O}_{2}}\].
A)
18.2 g done
clear
B)
13.6 g done
clear
C)
13.4 g done
clear
D)
18.4. done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer37)
Number of atoms present in \[5g\] of \[NaN{{O}_{3}}\]is:
A)
\[1.8\times {{10}^{24}}\] atoms done
clear
B)
3.54 atoms done
clear
C)
\[3.54\times {{10}^{24}}\] atoms done
clear
D)
\[1.54\times {{10}^{23}}\] atoms done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer38)
The isotopes contain the same number of____ and different number of______.
A)
Neutrons, Protons done
clear
B)
Electrons, Protons done
clear
C)
Protons, Neutrons done
clear
D)
Neutrons, Protons done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer39)
Formula of copper (II) sulphate pentahydrate is:
A)
\[CuS{{o}_{4}}.2{{H}_{2}}O\] done
clear
B)
\[Cu\,S{{o}_{4}}.5{{H}_{2}}O\] done
clear
C)
\[5Cu\,S{{o}_{4}}.{{H}_{2}}O\] done
clear
D)
\[Cu\,S{{o}_{4}}.{{H}_{2}}O\] done
clear
E)
None of these done
clear
View Solution play_arrow
-
question_answer40)
Number of valence electrons in sulphur are:
A)
8 done
clear
B)
6 done
clear
C)
2 done
clear
D)
7 done
clear
E)
None of these done
clear
View Solution play_arrow