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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowA) K done clear
B) L done clear
C) M done clear
D) N done clear
E) None of these done clear
View Solution play_arrowA) 2 done clear
B) 8 done clear
C) 18 done clear
D) 26 done clear
E) None of these done clear
View Solution play_arrowquestion_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_arrowquestion_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_arrowA) 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_arrowquestion_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_arrowquestion_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_arrowA) \[7.7\times {{10}^{20}}\,molecules\] 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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowA) 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_arrowA) 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_arrowquestion_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_arrowquestion_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_arrowquestion_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_arrowquestion_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
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