Practice Test

Q1) Carbon is a Show Answer

Q2) Which of the following is the most common variety of coal ? Show Answer

Q3) Carbon dioxide Show Answer

Q4) Which of the following is a constituent of gun powder and is also a reducing agent ? Show Answer

Q5) Acid carbonates are known as Show Answer

Q6) When carbon dioxides is passed through water containing tube litmus, the resultant solution is Show Answer

Q7) Which of the following is different from others ? Show Answer

Q8) Both mortar and whitewash contain Show Answer

Q9) Which of the following carbonates is green ? Show Answer

Q10) Oxidation is defined as Show Answer

Q11) Which of the following is not an allotropic form of C ? Show Answer

Q12) Which of the following is not a property of diamond ? Show Answer

Q13) Graphite is a good conductor of electricity due to the presence of Show Answer

Q14) Which of the following is not an amorphous form of C ? Show Answer

Q15) Which of the following varieties of coal has highest percentage of carbon ? Show Answer

Q16) During daytime plants absorb Show Answer

Q17) Air becomes incombustible if its carbon dioxide content is Show Answer

Q18) Water gas is a mixture of Show Answer

Q19) Hot and concentrated nitric acid reacts with carbon to form Show Answer

Q20) Carbon black is obtained by Show Answer

Q21) Carbon reacts with concentrated sulphuric acid to give Show Answer

Q22) Carbon monoxide reacts with chlorine in the presence of sunlight to give Show Answer

Q23) CO is absorbed by Show Answer

Q24) Which of the following is the least pure form of carbon ? Show Answer

Q25) Carbon monoxide is NOT used in Show Answer

Q26) Which oxide of carbon is obtained when potassium hexacyanoferrate (II) is warmed with sulphuric acid ? Show Answer

Q27) Which of the following is known as pyrene ? Show Answer

Q28) Which nitrogen compound of carbon is called pseudohalogen ? Show Answer

Q29) The number and type of bonds between two carbon atoms in Calcium carbide are Show Answer

Q30) Graphite is a soft-solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite Show Answer

Q31) Carbogen is Show Answer

Q32) Which of the following pairs are interstitial carbides ? Show Answer

Q33) The phenomenon by which activated charcoal removes colouring matter from pure substance is Show Answer

Q34) Which oxidation state is not shown by carbon in its compounds ? Show Answer

Q35) CO forms a volatile compound with Show Answer

Q36) Carbon forms large number of compounds because it has Show Answer

Q37) The nature of chemical bonds in diamond is Show Answer

Q38) Carbon atoms in diamond are bonded with each other in which configuration ? Show Answer

Q39) Use of diamond as a gem depends upon its Show Answer

Q40) Lead pencil contains Show Answer

Q41) Distance between two layers of carbon atoms in graphite is Show Answer

Q42) The inert form of carbon is Show Answer

Q43) Graphite is used in nuclear reactor Show Answer

Q44) Graphite is a good conductor because Show Answer

Q45) Difference between diamond and graphite is that Show Answer

Q46) Diamond and graphite both are made of carbon atoms. Diamond is extremely hard whereas graphite is soft. This is because Show Answer

Q47) Among the following hardest is Show Answer

Q48) The variety of coal having the highest carbon content is Show Answer

Q49) The variety of coal having the lowest carbon content is Show Answer

Q50) What happens when steam is passed over red hot carbon ? Show Answer

Q51) Activated charcoal is employed to remove colouring matter from pure substance it works by Show Answer

Q52) Formation of coal from wood is Show Answer

Q53) The charcoal used to decolourise brown sugar solution is Show Answer

Q54) The most reactive form of carbon is Show Answer

Q55) Charcoal is activated by treating with Show Answer

Q56) Coke is obtained from wood by Show Answer

Q57) Coal gas is a mixture of Show Answer

Q58) Producer gas is a mixture of Show Answer

Q59) Which has the highest calorific value ? Show Answer

Q60) Maximum calorific value is of Show Answer

Q61) ASSERTION :
Diamond is used as a precious stone.
REASON :
In diamond carbon atoms are tetrahedrally arranged. Show Answer

Q62) ASSERTION :
graphite behaves as a lubricant.
REASON :
The layers of carbon atoms in graphite can slip past one over another. Show Answer

Q63) ASSERTION :
Graphite is more reactive than diamond.
REASON :
Graphite has a two dimensional sheet like structure, where the adjacant layers are held by weak can der Wall's forces. Show Answer

Q64) ASSERTION :
Diamond, graphite and charcoal when burnt in oxygen change to carbon dioxide.
REASON :
Chemical properties of elements in solid state depends upon the arrangement of atoms. Show Answer

Q65) ASSERTION :
Graphite is good conductor of electricity.
REASON :
In graphite carbon atoms are not bounded by covalent bond. Show Answer

Q66) The pure form of carbon is Show Answer

Q67) Consider the following statements :
(I) Diamond is hard and graphite is soft.
(II) Diamond is soft and graphite is hard.
(III) Diamond is a bad conductor, but graphite is a good conductor.
(IV) Diamond is a good conductor, but graphite is a bad conductor.
Which of the statement(s) given above is/are correct ? Show Answer

Q68) The following questions consist of two statement, I and II. Examine these two statements carefully and select the answer accordingly 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 :
Diamond is very hard and has high melting point.
STATEMENT II :
In diamond, each carbon is convalently bonded to four other carbon atoms to form a three-dimensional network. Show Answer

Q69) Which of the following statements about diamond are correct ?
(I) It is used as a gem in jewellery because of its ability to reflect light.
(II) It is a good conductor of electricity.
(III) It is used for cutting glass, marble, stones and other hard materials.
(IV) It is used for drilling of rocks.
Select the correct answer using the code given below : Show Answer

Q70) Which one among the following statements is not correct about graphite ? Show Answer

Q71) Diamond is a Show Answer

Q72) Consider the following statements regarding diamond.
(I) It is an allotrope of silicon.
(II) It is a bad conductor of heat and electricity.
(III) It is the hardest substance.
(IV) It burns to produce carbon dioxide.
Which of the statements given above are correct ? Show Answer

Q73) Consider the following.
Crude oil is a direct source of
(I) Asphalt
(II) Paraffin wax
(III) Fatty acids
(IV) Gas oil
Which of the above are correct ? Show Answer

Q74) Following question consist of two statements labelled as Assertion and Reason. Examine both the statements carefully and mark the correct choice according to the codes given below :
(A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
(C) If Assertion is true, but Reason is false.
(D) If Assertion is false but Reason is true.
ASSERTION :
Carbon can form more compounds than any other element.
REASON :
Carbon can exist in various allotropes. Show Answer

Q75) Which one of the following oxide of carbon is most stable ? Show Answer

Q76) Dry powder extinguishers contain Show Answer

Q77) Tricol is Show Answer

Q78) Which one of the following is a linear molecule ? Show Answer

Q79) Which of the following is decomposed on heating ? Show Answer

Q80) An anhydride of carbonic acid is Show Answer

Q81) Carbonic is a mixture of Show Answer

Q82) Soda water contains Show Answer

Q83) Fixation of carbon dioxide by plants is called Show Answer

Q84) Carbon dioxide is not used as a fire extinguisher in fire caused by Show Answer

Q85) Which one of the following statement is not correct ? Show Answer

Q86) Carbon dioxide can oxidise Show Answer

Q87) Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which of the following would be the best absorbing material for the carbon dioxide ? Show Answer

Q88) Identify the correct statement Show Answer

Q89) Pick up the false statement Show Answer

Q90) Conversion of glucose into ethanol is called Show Answer

Q91) ASSERTION :
Carbon dioxide turns lime water milky.
REASON :
Calcium carbonate is insoluble in water. Show Answer

Q92) Dry ice is used for making cold-baths in laboratories by mixing with volatile organic solvents. Identify the form of dry ice from the following . Show Answer