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

Q35) Which of the following statement is correct ? Show Answer

Q36) The most abundant element in the earth's crust is Show Answer

Q37) Which one of the following processes results in the formation of a new chemical compound ? Show Answer

Q38) Which one of the following statements is false ? Show Answer

Q39) Which one of the following is not a mixture ? Show Answer

Q40) Which one of the following liquid mixture cannot be separated by fractional distillation method ? Show Answer

Q41) A mixture of sand and ammonium chloride can be separated by Show Answer

Q42) Calcium sulphate containing sodium sulphate as impurity is separated by Show Answer

Q43) Which of the following mixture can be separated by sublimation method ? Show Answer

Q44) Which of the following mixture may be separated by using separating funnel ? Show Answer

Q45) The best method to separate the components of an ink is Show Answer

Q46) 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

Q47) Which of the following is not a compound ? Show Answer

Q48) Which of the following processes would you use to obtain the components from an aqueous solution of copper sulphate ? Show Answer

Q49) Magnesium is present in Show Answer

Q50) Which one of the following elements is used as a catalyst in the hydrogenation of vegetable oils ? Show Answer

Q51) An element which is not found in nature is Show Answer

Q52) Which one of the following is most abundant metallic element ? Show Answer

Q53) The most abundant gas is Show Answer

Q54) Purest from of iron is Show Answer

Q55) LPG (Liquified petroleum gas) is a Show Answer

Q56) A mixture of red and blue ink can be separated by Show Answer

Q57) Iodine is separated from sand by Show Answer

Q58) A mixture of methanol and acetone is separated by Show Answer

Q59) A mixture that can be separated by the sublimation method is Show Answer

Q60) Which one of the following is not separated by sublimation ? Show Answer

Q61) Pure water is obtained from sea water by Show Answer

Q62) Steam distillation is used to separate Show Answer

Q63) Chromatography is used to separate Show Answer

Q64) Tinstone and wolframite is separated by Show Answer

Q65) The boiling points of two miscible liquids X and Y are close to each other. Their separation is best carried out by Show Answer

Q66) During fractional distillation, the substance with Show Answer

Q67) Dialysis is used for the purification of Show Answer

Q68) In column chromatography, the substance obtained in the top most region of column is Show Answer

Q69) By decreasing pressure boiling point of a liquid Show Answer

Q70) Which of the following is not correctly matched ? Show Answer

Q71) Barium carbonate is a/an Show Answer

Q72) Which one of the following is the most abundant compound ? Show Answer

Q73) First organic compound which was prepared in laboratory is Show Answer

Q74) Who prepared the first organic the compound in laboratory ? Show Answer

Q75) Which one of the following is a compound ? Show Answer

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

Q77) False statement is Show Answer

Q78) Water is a compound because Show Answer

Q79) Which of the following is neither an element nor a compound ? Show Answer

Q80) Which of the following equation is correctly balanced ? Show Answer

Q81) 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

Q82) 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

Q83) ASSERTION (A) :
Impure glycerine is purified by vacuum distillation.
REASON (R) :
Glycerine dissolves in water. Show Answer

Q84) ASSERTION (A) :
Water is a compound.
REASON (R) :
It contains hydrogen and oxygen. Show Answer

Q85) 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

Q86) A mixture of sodium chloride and naphthalene can be separated by Show Answer

Q87) Metalloids are Show Answer

Q88) Air is Show Answer

Q89) Which one of the following equation is correctly balanced ? Show Answer

Q90) Which one among the following is not a mixture ? Show Answer

Q91) A student by chance mixed acetone with alcohol. This mixture of acetone and alcohol can be separated by Show Answer

Q92) Which one of the following is not a mixture ? Show Answer