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The tentative solution of a problem is called : Observation , Hypothesis , Law , Prediction
Which formula gives simplest ratio between atoms of a molecule : Empirical formula , Chemical formula , Molecular formula , unit formula
The maximum number of electron which can be accommodated in L-shell are: 32 , 18 , 8 , 2
Which period in complete in periodic table : Second , Third , Sixth , Seventh
Which type of bound is present in H- Molecule: Ionic , Covalent , Coordinate covalent , Metallic
Converting of a liquid into vapours without heating is called : Evaporation , Sublimation , Boiling , Freezing
The solubility of which substance decreases on increasing temperature : Li2CO3 , NaNO3 , AgNO3 , KCl
One Faraday is equal to the : 96000 Coulomb , 96200 Coulomb , 96300 Coulomb , 96500 Coulomb
According to which theory , electron pair donar is called : Arrhenius theory , Lowry-Bronsted theory , Lewis theory , None of them
The water molecule in crystals of CuSO4 is : 5 , 4 , 3 , 2
Which is not a hygroscope compound : NaNO3, NaCl , CaCl2 , CaO
Which element belong to group IV-A : Be , C , N , O
Sulphur is used as: Vulcanization , Medical treatment , Decolourizer , All
Zinc oxide is : Acidic oxide , Basic oxide , Amphoteric oxide , Neutral
Which gas produces during the reaction : HCl + Na2 CO3 ? CO2 , Cl2 , H2 , CO
The difference in molecular mass of two homologous members of same functional group is : 8 , 14 , 18 , 20
The anode in the mercury cell is made of : Graphite , Iron , Steel , Platinum
Symbol of element were given by : Berzelius, Vont Hoff , Bohar , John
Which element is taken as standard compare atomic masses of other elements : H , C, N, O
Uranium has isotopes of it : 1 , 2 , 3 , 4
According to which law, each eighth element repeats the properties of the first element : Doberiener’s Law, Newland’s Law , Mendeleef’s Law , Mosley’s Law
Which molecule has coordinate covalent bound in it : Nacl , H2O , H3N , BF3 , NH3
Which Substance can be sublimed : HCl , NH3 , NaCl, I2
The number of moles dissolved in 1 dm³ solution is called : Molar solution , Molarity , Dilute solution , Concentrated solution
Acidity of sodium hydroxide is : One, two , three , four
A cell which convert chemical energy into electric energy is called : Electrolytic cell , Voltaic cell , Galvanic cell , Voltaic cell and Galvanic cell
Branch of chemistry which is related to the heat changes during chemical reaction is called : Electro chemistry , Thermochemistry , Organic chemistry , Inorganic chemistry
The formula of heavy water is : H2O , D2O , T2O , All
Which gas changes to dry ice on cooling at 80 °C CO2 , CO , H2 , SO2
The atomic mass of nitrogen is : 7, 8 , 14 , 18
Which catalyst is used in contact process of preparation of sulphuric acid : Pt , V2 O5 , ZnO/Cr2O3 , Pt or V2O5
Which halogen element cause goiter due to its deficiency : Cl , Br , I , At
Functional group of alcoholic compounds is : Hydroxy group (-OH) , Hydroxide (OH) , Carboxy group (-COOH) , Halo-group (-x)
The general formula of alkynes : CnH2n , CnH2a+1 , CnH2n+1 , CnH2n-2