-
question_answer1)
Identify the symbols of lead and mercury respectively.
A)
\[Hg,\,\,Pb\] done
clear
B)
\[Pb,\,\,Hg\] done
clear
C)
\[Le,\,\,Mg\] done
clear
D)
\[Ld,\,\,My\] done
clear
View Solution play_arrow
-
question_answer2)
What is the weight of \[3\] gram atoms of sulphur?
A)
\[96\,\,g\] done
clear
B)
\[99\,\,g\] done
clear
C)
\[100\,\,g\] done
clear
D)
\[3\,\,g\] done
clear
View Solution play_arrow
-
question_answer3)
How many moles of oxygen atoms are present in one mole of acetic acid?
A)
\[1\] mole done
clear
B)
\[3\] moles done
clear
C)
\[2\] moles done
clear
D)
\[6\] moles done
clear
View Solution play_arrow
-
question_answer4)
Calculate the weight in grams present in \[0.7\] moles of sodium.
A)
\[16.1\,\,g\] done
clear
B)
\[16.2\,\,g\] done
clear
C)
\[16.3\,\,g\] done
clear
D)
\[0.161\,\,g\] done
clear
View Solution play_arrow
-
question_answer5)
How many gram atoms and atoms are there in \[10\] grams of calcium?
A)
\[0.25\] gram atoms, \[6.023\times {{10}^{-23}}\] atoms done
clear
B)
\[0.25\] gram atoms, \[1.50\times {{10}^{-23}}\] atoms done
clear
C)
\[0.1\] gram atoms, \[6.023\times {{10}^{23}}\] atoms done
clear
D)
\[0.1\] gram atoms, \[1.50\times {{10}^{23}}\] atoms done
clear
View Solution play_arrow
-
question_answer6)
How many moles are present in \[540\,\,g\] of glucose\[({{C}_{6}}{{H}_{12}}{{O}_{6}})\]?
A)
\[2\]moles done
clear
B)
\[3\]moles done
clear
C)
\[4\]moles done
clear
D)
\[1\]mole done
clear
View Solution play_arrow
-
question_answer7)
How much lime is obtained by burning \[400\,\,g\] of lime stone?
A)
\[224\,\,g\] done
clear
B)
\[220\,\,g\] done
clear
C)
\[400\,\,g\] done
clear
D)
\[320\,\,g\] done
clear
View Solution play_arrow
-
question_answer8)
The approximate production of sodium carbonate per month is \[424\times {{10}^{6}}g\] while that of methyl alcohol is\[320\times {{10}^{6}}g\]. Which of the following is produced more in terms of number of moles?
A)
Sodium carbonate done
clear
B)
Methyl alcohol done
clear
C)
Both [a] and [b] done
clear
D)
Data insufficient done
clear
View Solution play_arrow
-
question_answer9)
Calculate the weight of \[3.0\] moles of\[KCl{{O}_{3}}\].
A)
\[245\,\,g\] done
clear
B)
\[249\,\,g\] done
clear
C)
\[367.5\,\,g\] done
clear
D)
\[24.5\,\,g\] done
clear
View Solution play_arrow
-
question_answer10)
Identify the correct increasing order of molecular weights of the given compounds.
A)
\[{{H}_{2}}O>{{H}_{2}}S>C{{O}_{2}}>S{{O}_{2}}\] done
clear
B)
\[{{H}_{2}}O>{{H}_{2}}S>C{{O}_{2}}>S{{O}_{2}}\] done
clear
C)
\[{{H}_{2}}O<{{H}_{2}}S<C{{O}_{2}}<S{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}O>{{H}_{2}}S>C{{O}_{2}}>S{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer11)
Calculate the number of moles present in \[400\] grams of\[CaC{{O}_{3}}\].
A)
\[2\]moles done
clear
B)
\[3\]moles done
clear
C)
\[1\]mole done
clear
D)
\[4\]moles done
clear
View Solution play_arrow
-
question_answer12)
Calculate the weight of \[0.885\] moles of\[Mg{{(N{{O}_{3}})}_{2}}\].
A)
\[13.1\,\,g\] done
clear
B)
\[131\,\,g\] done
clear
C)
\[130\,\,g\] done
clear
D)
\[88.5\,\,g\] done
clear
View Solution play_arrow
-
question_answer13)
What is the mass of one molecule of oxygen?
A)
\[5.31\times {{10}^{-23}}g\] done
clear
B)
\[5.33\times {{10}^{23}}g\] done
clear
C)
\[5.25\times {{10}^{23}}g\] done
clear
D)
\[5.02\times {{10}^{-23}}g\] done
clear
View Solution play_arrow
-
question_answer14)
Calculate the number of atoms present in \[6.4\,\,g\] of sulphur.
A)
\[2.4\times {{10}^{-23}}\]atoms done
clear
B)
\[2.4\times {{10}^{-23}}\]atoms done
clear
C)
\[1.2\times {{10}^{23}}\]atoms done
clear
D)
\[1.2\times {{10}^{-23}}\]atoms done
clear
View Solution play_arrow
-
question_answer15)
How many gram atoms are present in \[256\,\,g\] of\[{{O}_{2}}\]?
A)
\[16\] gram atoms done
clear
B)
\[32\] gram atoms done
clear
C)
\[14\] gram atoms done
clear
D)
\[36\] gram atoms done
clear
View Solution play_arrow
-
question_answer16)
Calculate the number of atoms present in \[71\,\,g\] of\[C{{l}_{2}}\].
A)
\[1.205\times {{10}^{-24}}\]atoms done
clear
B)
\[1.205\times {{10}^{23}}\]atoms done
clear
C)
\[1.205\times {{10}^{24}}\]atoms done
clear
D)
\[1.205\times {{10}^{-23}}\]atoms done
clear
View Solution play_arrow
-
question_answer17)
What does the atomicity of an element tell us about?
A)
Physical properties done
clear
B)
Number of electrons done
clear
C)
Number of atoms in one molecule done
clear
D)
Its combining capacity done
clear
View Solution play_arrow
-
question_answer18)
Calculate the weight in grams of \[0.75\] gram moles of\[NaHC{{O}_{3}}\].
A)
\[64\,\,g\] done
clear
B)
\[63\,\,g\] done
clear
C)
\[65\,\,g\] done
clear
D)
\[66\,\,g\] done
clear
View Solution play_arrow
-
question_answer19)
Calculate the number of moles of helium present in\[6.46\,\,g\]. (The atomic weight of helium is\[4\,\,a.m.u.\]).
A)
\[16.15\] moles done
clear
B)
\[1.615\] moles done
clear
C)
\[161.5\] moles done
clear
D)
\[0.1615\] moles done
clear
View Solution play_arrow
-
question_answer20)
Calculate the weight of \[2.5\] moles of\[CaC{{O}_{3}}\].
A)
\[200\,\,g\] done
clear
B)
\[230\,\,g\] done
clear
C)
\[240\,\,g\] done
clear
D)
\[250\,\,g\] done
clear
View Solution play_arrow
-
question_answer21)
How many grams of \[N{{a}_{2}}C{{O}_{3}}\] weighed to get \[0.1\] mole\[N{{a}_{2}}C{{O}_{3}}\]?
A)
\[10\,\,g\] done
clear
B)
\[5\,\,g\] done
clear
C)
\[10.6\,\,g\] done
clear
D)
\[12.6\,\,g\] done
clear
View Solution play_arrow
-
question_answer22)
A molecular formula is a short form representation of\['X'\]. Identify \['X'\] from the following.
A)
A compound done
clear
B)
An element done
clear
C)
A mixture done
clear
D)
An alloy done
clear
View Solution play_arrow
-
question_answer23)
Calculate the weight of \[0.8\] moles of magnesium.
A)
\[20\,\,g\] done
clear
B)
\[30\,\,g\] done
clear
C)
\[19.2\,\,g\] done
clear
D)
\[31.2\,\,g\] done
clear
View Solution play_arrow
-
question_answer24)
Calculate the number of molecules present in\[0.5\]moles of magnesium oxide\[(MgO)\]. (Atomic weights\[Mg=24,\,\,O=16\])
A)
\[14.09\times {{10}^{23}}\]molecules done
clear
B)
\[3.0115\times {{10}^{23}}\]molecules done
clear
C)
\[30.12\times {{10}^{23}}\]molecules done
clear
D)
\[14.09\times {{10}^{-23}}\]molecules done
clear
View Solution play_arrow
-
question_answer25)
Calculate the number of grams present in \[0.5\] moles of acetylene.
A)
\[13\,\,g\] done
clear
B)
\[14\,\,g\] done
clear
C)
\[16\,\,g\] done
clear
D)
\[13.5\,\,g\] done
clear
View Solution play_arrow
-
question_answer26)
Calculate the number of iron atoms in a piece of iron weighing 2.8 g.(Atomic mass of iron\[=56\])
A)
\[30.11\times {{10}^{23}}\]atoms done
clear
B)
\[3.11\times {{10}^{23}}\]atoms done
clear
C)
\[3.0115\times {{10}^{22}}\]atoms done
clear
D)
\[301.1\times {{10}^{23}}\]atoms done
clear
View Solution play_arrow
-
question_answer27)
If the formula of chromic acid is \[{{H}_{2}}Cr{{O}_{4}}\], then what is the formula of divalent metal chromate?
A)
\[MCr{{O}_{4}}\] done
clear
B)
\[{{M}_{2}}Cr{{O}_{4}}\] done
clear
C)
\[{{M}_{2}}{{(Cr{{O}_{4}})}_{3}}\] done
clear
D)
\[{{M}_{3}}Cr{{O}_{4}}\] done
clear
View Solution play_arrow
-
question_answer28)
Sulphur molecule exists as\[{{S}_{8}}\]. How many moles of sulphur are present in \[25.6\] grams of sulphur?
A)
\[0.01\]moles done
clear
B)
\[0.1\]moles done
clear
C)
\[0.02\]moles done
clear
D)
\[0.2\]moles done
clear
View Solution play_arrow
-
question_answer29)
Calculate the number of moles of zinc in\[23.3\,\,g\].
A)
\[0.37\]moles done
clear
B)
\[0.36\]moles done
clear
C)
\[0.5\]moles done
clear
D)
\[0.53\]moles done
clear
View Solution play_arrow
-
question_answer30)
How many grams of sodium oxalate are to be weighed to get 0.1 mole of sodium oxalate\[(N{{a}_{2}}{{C}_{2}}{{O}_{4}})\]?
A)
\[13.4\,\,g\] done
clear
B)
\[1.34\,\,g\] done
clear
C)
\[134\,\,g\] done
clear
D)
\[0.134\,\,g\] done
clear
View Solution play_arrow
-
question_answer31)
Calculate the number of atoms of sulphur present in \[0.5\] moles of.
A)
\[62.02\times {{10}^{23}}\]atoms done
clear
B)
\[622\times {{10}^{23}}\]atoms done
clear
C)
\[6.023\times {{10}^{23}}\]atoms done
clear
D)
\[6.02\times {{10}^{-23}}\]atoms done
clear
View Solution play_arrow
-
question_answer32)
How many moles are present in \[5.3\,\,g\] of anhydrous sodium carbonate?
A)
\[0.03\] moles done
clear
B)
\[0.04\] moles done
clear
C)
\[0.05\] moles done
clear
D)
\[0.01\] moles done
clear
View Solution play_arrow
-
question_answer33)
Calculate the number of moles present in \[4.9\,\,g\] of\[4.9\,\,g\]of\[{{H}_{2}}S{{O}_{4}}\].
A)
\[0.01\] moles done
clear
B)
\[0.02\] moles done
clear
C)
\[0.05\] moles done
clear
D)
\[0.03\] moles done
clear
View Solution play_arrow
-
question_answer34)
Calculate the number of moles present in \[60\,\,g\] of\[NaOH\].
A)
\[1.2\] moles done
clear
B)
\[1.5\] moles done
clear
C)
\[2.5\] moles done
clear
D)
\[0.15\] moles done
clear
View Solution play_arrow
-
question_answer35)
What will be the weight of \[0.1\] mole of \[CaC{{O}_{3}}\]in grams?
A)
\[11\,\,g\] done
clear
B)
\[12\,\,g\] done
clear
C)
\[3\,\,g\] done
clear
D)
\[10\,\,g\] done
clear
View Solution play_arrow
-
question_answer36)
Calculate the weight of sulphur present in \[1.5\] moles of hydrogen sulphide.
A)
\[48\,\,g\] done
clear
B)
\[50\,\,g\] done
clear
C)
\[60\,\,g\] done
clear
D)
\[70\,\,g\] done
clear
View Solution play_arrow
-
question_answer37)
Calculate the mass of one molecule of\[{{H}_{2}}O\].
A)
\[29.88\times {{10}^{23}}g\] done
clear
B)
\[2.988\times {{10}^{23}}g\] done
clear
C)
\[0.2988\times {{10}^{23}}g\] done
clear
D)
\[2.988\times {{10}^{-23}}g\] done
clear
View Solution play_arrow
-
question_answer38)
What weight of calcium contains the same number of atoms as those in \[3\text{ }g\] of carbon?
A)
\[10\,\,g\] done
clear
B)
\[20\,\,g\] done
clear
C)
\[30\,\,g\] done
clear
D)
\[40\,\,g\] done
clear
View Solution play_arrow
-
question_answer39)
What weight of sodium contains the same number of atoms as those in \[8\] grams of oxygen?
A)
\[10.5\,\,g\] done
clear
B)
\[13.5\,\,g\] done
clear
C)
\[11.5\,\,g\] done
clear
D)
\[14.2\,\,g\] done
clear
View Solution play_arrow
-
question_answer40)
Calculate the number of moles present in \[17\] grams of\[AgN{{O}_{3}}\].
A)
\[0.2\] moles done
clear
B)
\[0.1\] mole done
clear
C)
\[2\] moles done
clear
D)
\[1\] mole done
clear
View Solution play_arrow
-
question_answer41)
My Identify the pair of substances having the same formula unit mass.
A)
Calcium chloride, potassium carbonate done
clear
B)
Calcium oxide, hydrochloric acid done
clear
C)
Carbon monoxide, ammonia done
clear
D)
Carbon dioxide, nitrous oxide done
clear
View Solution play_arrow
-
question_answer42)
Find the number of moles of sodium nitrate which contains 1.5 moles of oxygen atoms.
A)
\[0.5\] done
clear
B)
\[1.5\] done
clear
C)
\[2.0\] done
clear
D)
\[1.0\] done
clear
View Solution play_arrow
-
question_answer43)
What is the ratio of the number of atoms of elements potassium, chlorine and oxygen respectively present in \[245\,\,g\] of\[KCl{{O}_{3}}\]?
A)
\[2:2:3\] done
clear
B)
\[1:1:3\] done
clear
C)
\[39:36:48\] done
clear
D)
\[1:2:6\] done
clear
View Solution play_arrow
-
question_answer44)
Carbon and oxygen react to produce carbon dioxide. What is the weight of oxygen required to convert \[1.5\,\,g\] of carbon to carbon dioxide?
A)
\[2\,\,g\] done
clear
B)
\[6\,\,g\] done
clear
C)
\[1\,\,g\] done
clear
D)
\[4\,\,g\] done
clear
View Solution play_arrow
-
question_answer45)
Selenium ingestion of \[90\] micrograms per day causes loss of hair. How many selenium atoms are there in this sample? (Atomic weight of \[Se=78.96\])
A)
\[6.8\times {{10}^{23}}\]atoms done
clear
B)
\[8.8\times {{10}^{17}}\]atoms done
clear
C)
\[8.8\times {{10}^{22}}\]atoms done
clear
D)
\[6.9\times {{10}^{17}}\]atoms done
clear
View Solution play_arrow
-
question_answer46)
All samples of pure water contain hydrogen and oxygen in the mass ratio of\[1:8\].To which of the following laws does the above statement is in agreement?
A)
Law of conservation of mass done
clear
B)
Law of constant proportion done
clear
C)
Law of multiple proportion done
clear
D)
Law of definite proportion done
clear
View Solution play_arrow
-
question_answer47)
Which of the following element's gram weight is \[6\,\,g\]for \[0.25\] moles of that element?
A)
Chlorine done
clear
B)
Magnesium done
clear
C)
Boron done
clear
D)
Carbon done
clear
View Solution play_arrow
-
question_answer48)
Which of the following is NOT a divalent ion?
A)
Sulphate done
clear
B)
Nitrate done
clear
C)
Hydrogen phosphate done
clear
D)
Carbonate done
clear
View Solution play_arrow
-
question_answer49)
How many gram atoms and number of atoms are present in \[20\,\,g\] of calcium?
A)
\[0.05\] gram atoms and \[3.1\times {{10}^{23}}\]atoms done
clear
B)
\[0.5\] gram atoms and \[3.01\times {{10}^{23}}\]atoms done
clear
C)
\[0.5\]gram atoms and \[3.1\times {{10}^{23}}\]atoms done
clear
D)
\[0.2\] gram atoms and \[3.1\times {{10}^{23}}\]atoms done
clear
View Solution play_arrow
-
question_answer50)
If the formula of a chloride of a metal\[M\]is\[MC{{l}_{3}}\], then what will be the formula of the phosphate of metal\[M\]?
A)
\[MP{{O}_{4}}\] done
clear
B)
\[{{M}_{2}}P{{O}_{4}}\] done
clear
C)
\[{{M}_{3}}P{{O}_{4}}\] done
clear
D)
\[{{M}_{2}}{{(P{{O}_{4}})}_{3}}\] done
clear
View Solution play_arrow