Practice Test


Q1) A substance which cannot be broken further is called Show Answer


Q2) Which of the following is a compound ? Show Answer


Q3) The substance formed by a chemical combination is known as Show Answer


Q4) Which of the following is incorrect ? Show Answer


Q5) Which of the following is an element ? Show Answer


Q6) Which of the following statement is incorrect for a mixture? Show Answer


Q7) Which of the following compound is composed of three elements ? Show Answer


Q8) Soil is a/an Show Answer


Q9) An ice flake is a/an Show Answer


Q10) In case, from a definite weight of one pure substance without the addition of any other substances, an equal total weight of two or more other substances can be obtained by chemical means, the substance is classified as Show Answer


Q11) Gasoline is a/an Show Answer


Q12) If efforts to obtain two or more substances by chemical means from any pure substance fail, the substance is classified as Show Answer


Q13) Brass is a/an Show Answer


Q14) Some elements show properties of both a metal and a non-metal. These are called Show Answer


Q15) Iron is a/an Show Answer


Q16) A homogeneous material consisting of one particular kind of matter is called a/an Show Answer


Q17) Sodium chloride is a/an Show Answer


Q18) Which of the following is compound ? Show Answer


Q19) A mixture of miscible solvents can be separated by Show Answer


Q20) A mixture of sodium chloride, sulphur, sand, and iron is stirred with carbon disulphide and filtered using a filter paper. The filtrate is evaporated to dryness in a china dish. What will be left in the china dish after evaporation ? Show Answer


Q21) Two substances A and B combine to form a substance C with the evolution of heat. The properties C are entirely different from properties of both A and B. It shows that C is a/an Show Answer


Q22) The substances that can be separated by physical methods are known as Show Answer


Q23) A mixture of ammonium chloride and sodium chloride can be separated by Show Answer


Q24) Sulphur is readily soluble in Show Answer


Q25) A mixture of ethyl alcohol and water can be separated by Show Answer


Q26) The method used for separating sand and camphor is Show Answer


Q27) The method used to separate the sand from the water is Show Answer


Q28) The sublimation obtained when a mixture of sand, sulphur, common salt and iodine is sublimated, will be Show Answer


Q29) Total number of elements reported so far is Show Answer


Q30) A solid soluble solute may be separated from the solvent by Show Answer


Q31) The second most abundant element in the earth is Show Answer


Q32) Which of the following is an example of a mixture ( a solid solute in a gas ) ? Show Answer


Q33) A material consisting of two or more kinds of matter, each having its own properties, is called a/an Show Answer


Q34) Air is a/an Show Answer


Q35) Method used for separating the iron fillings and sand is Show Answer


Q36) Which of the following statement is correct ? Show Answer


Q37) The most abundant element in the earth's crust is Show Answer


Q38) Which one of the following processes results in the formation of a new chemical compound ? Show Answer


Q39) Which one of the following statements is false ? Show Answer


Q40) Which one of the following is not a mixture ? Show Answer


Q41) Which one of the following liquid mixture cannot be separated by fractional distillation method ? Show Answer


Q42) A mixture of sand and ammonium chloride can be separated by Show Answer


Q43) Calcium sulphate containing sodium sulphate as impurity is separated by Show Answer


Q44) Which of the following mixture can be separated by sublimation method ? Show Answer


Q45) Which of the following mixture may be separated by using separating funnel ? Show Answer


Q46) The best method to separate the components of an ink is Show Answer


Q47) Sate which of the following is not likely to be an element :
(I) On heating gives off a gas and leaves a residue.
(II) Burns in air to form carbon dioxide and water.
(III) Changes into solid at 273 K and to a gas at 373 K. Show Answer


Q48) Which of the following is not a compound ? Show Answer


Q49) Which of the following processes would you use to obtain the components from an aqueous solution of copper sulphate ? Show Answer


Q50) Magnesium is present in Show Answer


Q51) Which one of the following elements is used as a catalyst in the hydrogenation of vegetable oils ? Show Answer


Q52) An element which is not found in nature is Show Answer


Q53) Which one of the following is most abundant metallic element ? Show Answer


Q54) The most abundant gas is Show Answer


Q55) Purest from of iron is Show Answer


Q56) LPG (Liquified petroleum gas) is a Show Answer


Q57) A mixture of red and blue ink can be separated by Show Answer


Q58) Iodine is separated from sand by Show Answer


Q59) A mixture of methanol and acetone is separated by Show Answer


Q60) A mixture that can be separated by the sublimation method is Show Answer


Q61) Which one of the following is not separated by sublimation ? Show Answer


Q62) Pure water is obtained from sea water by Show Answer


Q63) Steam distillation is used to separate Show Answer


Q64) Chromatography is used to separate Show Answer


Q65) Tinstone and wolframite is separated by Show Answer


Q66) The boiling points of two miscible liquids X and Y are close to each other. Their separation is best carried out by Show Answer


Q67) During fractional distillation, the substance with Show Answer


Q68) Dialysis is used for the purification of Show Answer


Q69) In column chromatography, the substance obtained in the top most region of column is Show Answer


Q70) By decreasing pressure boiling point of a liquid Show Answer


Q71) Which of the following is not correctly matched ? Show Answer


Q72) Barium carbonate is a/an Show Answer


Q73) Which one of the following is the most abundant compound ? Show Answer


Q74) First organic compound which was prepared in laboratory is Show Answer


Q75) Who prepared the first organic the compound in laboratory ? Show Answer


Q76) Which one of the following is a compound ? Show Answer


Q77) Which of the following is a compound ? Show Answer


Q78) False statement is Show Answer


Q79) Water is a compound because Show Answer


Q80) Which of the following is neither an element nor a compound ? Show Answer


Q81) Which of the following equation is correctly balanced ? Show Answer


Q82) ASSERTION (A) :
The formation of a mixture neither requires nor releases heat, light and electricity.
REASON (R) :
A mixture is a combination of two or more pure substances that are not chemically united. Show Answer


Q83) ASSERTION (A) :
In paper chromatography, both the fixed phase and mobile phase are liquids.
REASON (R) :
Distribution of the solute between the two liquids makes the separation possible. Show Answer


Q84) ASSERTION (A) :
Impure glycerine is purified by vacuum distillation.
REASON (R) :
Glycerine dissolves in water. Show Answer


Q85) ASSERTION (A) :
Water is a compound.
REASON (R) :
It contains hydrogen and oxygen. Show Answer


Q86) Following question consists of two statements, I and II. Examine these two statements and select the correct choice according to the codes given below :
(A) Both the statements are individually true and Statement II is the correct explanation of Statement I.
(B) Both the statements are individually true but Statement II is not the correct explanation of Statement I.
(C) Statement I is true, but Statement II is false.
(D) Statement I is false, but Statement II is true.
STATEMENT I :
Glass is not considered as a true compound.
STATEMENT II :
Glass does not have a definite melting point. Show Answer


Q87) A mixture of sodium chloride and naphthalene can be separated by Show Answer


Q88) Metalloids are Show Answer


Q89) Air is Show Answer


Q90) Which one of the following equation is correctly balanced ? Show Answer


Q91) Which one among the following is not a mixture ? Show Answer


Q92) A student by chance mixed acetone with alcohol. This mixture of acetone and alcohol can be separated by Show Answer


Q93) Which one of the following is not a mixture ? Show Answer