Practice Test

Q1) Avogadro's work was brought to light, after his death, by. Show Answer

Q2) Chemistry is a _______ science. Show Answer

Q3) _____ chemistry deals with the chemistry of elements other than carbon and of their compounds. Show Answer

Q4) The branch of chemistry that deals with the structure of matter, the energy changes and the theories, laws and principles that explain the transformation of matter from one form to another is called______ chemistry. Show Answer

Q5) ______ chemistry is the chemistry of the substance consisting of living organisms. Show Answer

Q6) The branch of chemistry that deals with the separation, identification and quantitative determination of the composition of different substances is called______ chemistry. Show Answer

Q7) Agidothymidine drug is used for treating_______ patients. Show Answer

Q8) ______ pigment acts as a photosynthesizer in plants. Show Answer

Q9) Solar energy can be converted into electrical energy using. Show Answer

Q10) Microprocessor used in computers are_______ chips developed by chemists. Show Answer

Q11) If two or more phases are present in a mixture then it is called a _______ mixture. Show Answer

Q12) The arbitrarily decided and universally accepted standards are called. Show Answer

Q13) Antoine Lavoisier proved that the flammable air produced by Cavendish was a new gas and named it as. Show Answer

Q14) Which out of the following is NOT a homogeneous mixture? Show Answer

Q15) Substance which cannot be decomposed into two different substances by chemical process are called. Show Answer

Q16) Which of the following is a compound? Show Answer

Q17) Which of the following is a fundamental quantity? Show Answer

Q18) Which of the following is a unit of energy? Show Answer

Q19) Mixture of all gases constitute ______ system. Show Answer

Q20) Mixture of liquids constitute_______ system. Show Answer

Q21) Phenol - water system is a Show Answer

Q22) Joseph Priestly found that the gas evolved on heating mercury oxide, supported vigorous burning. He named this gas as Show Answer

Q23) _____ elements exist naturally. Show Answer

Q24) _____ is the unit of luminous intensity. Show Answer

Q25) _______ is a substance of definite composition which can be decomposed into two or more substances by a simple chemical process. Show Answer

Q26) There are ________ Fundamental SI units. Show Answer

Q27) The law of definite coposition was proposed by. Show Answer

Q28) The law of multiple proportions is illustrated by Show Answer

Q29) Two elements, X (At. Mass 16) and Y (At. Mass 14) combine to form compounds A, B and C. The ratio of different masses of Y which combine with fixed mass of X in A, B and C is 1:3:5. If 32 parts by mass of X combine with 84 parts by mass of Y in B, then in C, 16 parts by mass of X will combine with Show Answer

Q30) The sum of the masses of reactants and product is equal in any physical or chemical reaction. This is in accordance with Show Answer

Q31) The law of multiple proportions is given by Show Answer

Q32) Greek philosopher_____ had suggested that matter is composed of extremely small a-tomio. Show Answer

Q33) On the basis of his assumptions, Dalton explained Show Answer

Q34) Dalton assumed that_______ are the smallest particles of compound. Show Answer

Q35) A _______ is an aggregate of two or more atoms of definite composition which are held together by chemical bonds. Show Answer

Q36) SI unit of mass is Show Answer

Q37) Volume occupied by 1 g molecular weight of any gas is called Show Answer

Q38) ______ is the sum of the atomic weights of all the atoms as given in the molecular formula of the substance. Show Answer

Q39) The mass percentage of each constituent element present in 100 g of compound is called its Show Answer

Q40) ________ law of combining volumes state that "Whenever gases combine, they do so in simple ratio by volumes".
Show Answer

Q41) Pure water can be obtained from various sources, but it always contain hydrogen and oxygen, combined in a ratio of 1:8 by weight. This is an example of
Show Answer

Q42) Recently the unit of atomic mass amu is replaced by. Show Answer

Q43) Molar mass is a ______ quantity. Show Answer

Q44) Avogadro number is number of particles present in Show Answer

Q45) Number of moles of water in 1 L of water with density 1 g/cc are Show Answer

Q46) 27 g of Al (At. Mass = 27) will react with oxygen equal to Show Answer

Q47) The largest number of molecules is present in Show Answer

Q48) Avogadro's number is Show Answer

Q49) Mole triangle is the relationship between the mass of a gas, the number of moles, the volume at S.T.P. and the Show Answer

Q50) The number of moles of sodium oxide in 620 g of it is Show Answer

Q51) 4.4 g of an unknown gas occupies 2.24 L of volume at standard temperature and pressure. The gas may be Show Answer

Q52) Avogadro's law distinguishes between Show Answer

Q53) The percentage of oxygen in NaOH is Show Answer

Q54) ______ of a compound is the chemical formula indicating the relative number of atoms in the simplest ratio. Show Answer

Q55) _______ indicates the actual number of constituents atoms in a molecule. Show Answer

Q56) Chemical formula cannot be determined by using Show Answer

Q57) The _______ coefficients are the coefficients of reactants and products in the balanced chemical reaction. Show Answer

Q58) _______ reactant is the reactant that reacts completely but limits further progress of the reaction. Show Answer

Q59) ________ reactant is the reactant which is taken in excess than the limiting reactant. Show Answer

Q60) A________ chemical reaction may be used to establish the weight relationships of reactants and products. Show Answer

Q61) The starting material which takes part in chemical reaction is called. Show Answer

Q62) The study of the composition, structure and properties of matter and the reactions by which one form of matter may be converted into another form is called. Show Answer

Q63) Amalgams are synthesized using________ technology. Show Answer

Q64) A______ is a simple combination of two or more substance in which the constituent substances retain their separate identities. Show Answer

Q65) Law of conservation of mass was first stated by Show Answer

Q66) Which of the following is indivisible by chemical methods? Show Answer

Q67) Atom is the smallest particle of Show Answer

Q68) Number of water molecules in a drop of water, if 1 mL of water has 20 drops and A is Avogadro number, is Show Answer

Q69) Which of the following law states that equal volume of all gases contain equal number of molecules?
Show Answer

Q70) Magnitude of 'micro-' is Show Answer

Q71) The unit of concentration is Show Answer

Q72) Which of the following is a fundamental SI unit? Show Answer

Q73) SI unit of velocity is Show Answer

Q74) SI unit of temperature is Show Answer

Q75) Which of the following reaction has the ratio of volumes of reacting gases and the product as 1:2:2? Show Answer

Q76) Atoms have a mass of the order Show Answer

Q77) Atoms have a radius of the order Show Answer

Q78) The number of atoms in 6 amu of He is Show Answer

Q79) The number of molecules present in 0.032 mg of methane is Show Answer

Q80) Number of molecules in 0.4 g of He is Show Answer

Q81) At STP, 2 g of helium gas (molar mass = 4) occupies a volume of Show Answer

Q82) Which of the following contains maximum number of atoms? Show Answer

Q83) How many moles of electrons weight one kilogram? Show Answer

Q84) Number of atoms of He in 100 amu of He (At. mass of He = 4) is Show Answer

Q85) The number of molecules in 16 g of oxygen is Show Answer

Q86) Which of the following has maximum number of atoms? Show Answer

Q87) Which of the following contains more molecules? Show Answer

Q88) 1 g - atom of nitrogen represents Show Answer

Q89) Which of the following represents 1g - molecule of the substance? Show Answer

Q90) How many molecules are present in one gram of hydrogen? Show Answer

Q91) The number of atoms of oxygen present in 11.2 L of ozone at N.T.P are Show Answer

Q92) The number of water molecules present in a drop of water weighing 0.018 g is Show Answer

Q93) The total number of electrons present in 3.2 g of methane is Show Answer

Q94) According to Avogadro's law Show Answer

Q95) The number of atoms present in 1 mole of water is Show Answer

Q96) The gram molecule of benzene is equal to Show Answer

Q97) The mass of 1 atom of hydrogen is Show Answer

Q98) Which pair of species have same percentage of carbon? Show Answer

Q99) A compound made of two element A and B are found to contain 25% A (At. mass 12.5) and 75% B (At.mass 37.5). The simplest formula of the compound is Show Answer

Q100) Two element x (At. mass 75) and Y (At. mass 16) combine to give a compound having 75.8% X. The formula of the compound is Show Answer

Q101) The molecular mass of an organic compound is 78. Its empirical formula is CH. The molecular formula is Show Answer

Q102) Empirical formula of glucose is Show Answer

Q103) The present atomic weight scale is based on Show Answer

Q104) The molecular formula of the compound with molar mass 159, containing 39.62% Cu and 20.13% S is Show Answer