Question 1 :
Which of the following constituents of coal is the most important in production of coke?
Question 3 :
Which of the following statements is/are incorrect for diamond?<br/>(a) The refractive index of diamond is highest among solids.<br/>(b) Diamond is hard because all the valence electrons of each carbon atom are involved in bond formation.<br/>(c) Diamond is thermodynamically more stable than graphite.<br/>(d) <span>One carat of diamond represents its weight.</span>
Question 6 :
How many double covalent bonds can a single carbon atom form at a time?
Question 8 :
Compounds of carbon and hydrogen which form long chains or branched chains are:
Question 12 :
Which of the following is not an allotropic form of carbon?
Question 13 :
The organic compounds having double or triple bond(s) in them are termed as ________________.
Question 15 :
On which of the following content of coke, its price depend?
Question 17 :
The substance which is expected to have the highest ignition temperature out of the following is _________.<br/>
Question 19 :
All allotropes of carbon exist in ___________ state at room temperature.
Question 20 :
A non-metal $X$ exists in two different forms $Y$ and $Z$. $Y$ is the hardest natural substance whereas $Z$ is a good conductor of electricity. $Y$ is :<br/>
Question 21 : <div><span>The phenomenon of existence of an element in more than one physical form is called allotropy.</span><br/></div>
Question 22 :
If X is a non-metal. It will not conduct electricity unless it is carbon in the form of :<br/>
Question 24 :
Which coal is the generally the primary source of coke production?
Question 25 :
The carbon atoms in diamond are bonded to each other by:
Question 26 :
Assertion: <span>Carbon is nonmetal.</span><br/>
Reason: <span>Carbon atoms can bond with each other.</span>
Question 27 :
If X is a non-metal, it will not conduct electricity unless it is carbon in the form of __________.
Question 34 :
Fullerene, an allotrope of carbon, has 60 carbon atoms joined together and no other element in it. There are various types of fullerenes. $C_{60}, C_{70}, C_{74}$ and $C_{78}$ are the members of the fullerene family. Identify the property due to which such large numbers of carbon atoms are joined together in this molecule<span> :</span>
Question 37 :
Which of the following is a monounsaturated hydrocarbon, i.e. the compound that contains one carbon - carbon double bond?
Question 45 :
How many triple covalent bonds can a single carbon atom form at a time?
Question 49 :
<span>Which form of coal is a highly effective absorbent for fuel and oil spills on land and water. It is also used as a conditioner for soil to make it more able to retain and slowly release water?</span>
Question 50 : <p>Identify the unsaturated compounds from the following -</p><p>(a) Propane (b) Propene</p><p>(c) Propyne (d) Chloropropane</p><p>(1) (a) and (b) (2) (b) and (d)</p><p>(3) (c) and (d) (4) (b) and (c)</p>
Question 51 :
A hydrocarbon reacts with hypochlorous acid to give 1-chloro-2-hydroxyethane. The hydrocarbon is
Question 52 :
What is the water quantity in the coke at the end of the coking process?
Question 55 :
Crystalline form of carbon having 60 carbon atoms joined together is called :
Question 58 :
In the Earth's crust, Carbon is found in the form of_________.
Question 60 :
Which one has an allotrophic form that is a good electrical conductor at standard conditions ?<span><br/></span>
Question 61 :
<span>Who has synthesised the organic compound 'urea' for the first time?</span>
Question 64 : Match the List I and List II and select the correct answer the code given below the list<br><table class="wysiwyg-table"><tbody><tr><td>List I</td><td>List II</td></tr><tr><td>1. ${C}_{n}{H}_{2n}$</td><td>(A) ethers</td></tr><tr><td>2. ${C}_{n}{H}_{2n-2}$</td><td>(B) alkenes, cycloalkanes</td></tr><tr><td>3. ${C}_{n}{H}_{2n+2}O$</td><td>(C) aldehydes, ketones</td></tr><tr><td>4. ${C}_{n}{H}_{2n}O$</td><td>(D) alkynes, alkanienes</td></tr></tbody></table>Codes:
Question 65 :
Assertion: Carbon and its compounds used as fuels for most applications.
Reason: When carbon is heated in presence of excess of air or oxygen, it forms carbon dioxide. During its formation, a large amount of heat and light are released. Further, once ignited, carbon and its compounds keep on burning without needing additional heat energy.
Question 67 :
Activated charcoal is used in gas masks for military and industrial purposes because:<br>
Question 68 :
Which of the following compounds is used in antiknock compositions to prevent the deposition of oxides of lead on the spark plug, combustion chamber, and exhaust pipe?
Question 70 :
Which form of the coal produces more greenhouse gases if it undergoes combustion?
Question 71 :
Among the following which one is the formula for noncyclic, saturated hydrocarbon?
Question 75 :
An allotropic form of carbon used for cutting and drilling is :
Question 76 :
Graphite is used as a lubricant in machines because it has a very high melting point and also it :
Question 81 :
The allotrope of carbon which is a good conductor of heat and electricity is:
Question 82 :
$C_{graphite}+O_{2(g)}\rightarrow CO_{2(g)}; \Delta H=-393.5kJ, \Delta H$ of the reaction cannot be:
Question 83 :
When mixture of air and steam is passed over red hot coke, the outgoing gas contains:
Question 85 :
The % by volume of $C_{4}H_{10}$ is a gaseous mixture of $C_{4}H_{10}, CH_{4}$ and $CO$ is $40$. When $200\ ml$ of the mixture is burnt in excess of $O_{2}$, Find volume (in ml) of $CO_{2}$ produced :
Question 86 :
<span>Petrol consists of hydrocarbons majorily from $ C_{12}H_{26} $ to $ C_{15}H_{32}.$</span>
Question 88 :
Which of the following does not decolourise bromine solution in carbon disulphide
Question 90 : Information about four hydrocarbons is shown.<br><table class="wysiwyg-table"><tbody><tr><td>hydrocarbon</td><td>number of carbon atoms<br>in the molecules</td><td>reaction with bromine<br>water</td></tr><tr><td>W</td><td>1</td><td>no reaction</td></tr><tr><td>X</td><td>2</td><td>no reaction</td></tr><tr><td>Y</td><td>3</td><td>decolourises it</td></tr><tr><td>Z</td><td>4</td><td>decolourises it</td></tr></tbody></table>Which statement is correct?
Question 91 :
<span>What percent of the carbon content is present in Bituminous coal?</span>
Question 94 : The degree of unsaturation in the given compound is:<br/>1) $C_3H_3Cl_3$ <div>2) $C_3H_4O$</div><div>3) $C_4H_5N$</div>
Question 95 :
From the below given options, which one is not a type of coal?
Question 97 :
Coking coal is used for making iron. It was invented by Abraham Darby of England when he added to coal the right proportion of:
Question 98 :
Which of the following allotropes of carbon is isomorphous with crystalline silicon?
Question 100 :
Consider the following statements : A hydrocarbon of molecular formula $C_{5}H_{10}$ is a:<br>I. monosubstituted alkene<br>II. disubstituted alkene<br>III. trisubstituted alkene
Question 101 :
How many hydrogen atoms would you expect to find in a saturated hydrocarbon with 7 carbon atoms?
Question 104 :
Using the given hints, identify the option with correct coal product and its use.<br/>(1)$\;\;$Almost pure form of carbon.<br/>
