Question 11 Markis an alio trope of carbon used to make ornaments.AnswerDiamondView full question & answer→
MCQ 21 Markis not a property of carbon dioxide gas.✓ Supporting combustionB OdourlessC ColourlessD Turns blue litmus redAnswerCorrect option: A. Supporting combustion Supporting combustionView full question & answer→
MCQ 31 MarkBiogas contains about methane.✓ 55% to 60%B 20% to 25%C 90% to 95%D 40% to 45%AnswerCorrect option: A. 55% to 60% 55% to 60%View full question & answer→
MCQ 41 MarkMelting point o* methane is✓ -182.5 °CB -161.5 °CC 182.5 °CD 161.5 °CAnswerCorrect option: A. -182.5 °C -182.5 °CView full question & answer→
MCQ 51 MarkMelting point of C02 isA 26 °CB 56 °C✓-56.6°CD-98°CAnswerCorrect option: C. -56.6°C -56.6 °CView full question & answer→
MCQ 61 MarkMelting point of diamond isA 3700 °C✓ 3500 °CC 4000 °CD 2500 °CAnswerCorrect option: B. 3500 °C 3500 °CView full question & answer→
MCQ 71 MarkCarbon dioxide gas is not used inA photosynthesisB aerated drinks✓ glass cuttingD fire extinguishersAnswerCorrect option: C. glass cutting glass cuttingView full question & answer→
MCQ 81 MarkCH3 – C = CH is ……………………… .A Propene✓ PropyneC EthyneD EtheneAnswerCorrect option: B. Propyne PropyneView full question & answer→
MCQ 91 MarkH2C = CH2 is ……………………… .A PropaneB EthyneC Ethane✓ EtheneAnswerCorrect option: D. Ethene EtheneView full question & answer→
MCQ 101 Markcoal contains highest percentage of carbon.A BituminousB Peat✓ AnthraciteD LigniteAnswerCorrect option: C. Anthracite AnthraciteView full question & answer→
MCQ 111 MarkMolecular mass of methane isA19✓16C17D18AnswerCorrect option: B. 1616View full question & answer→
MCQ 121 MarkWohler, a German scientist synthesized the compound from an inorganic compound ammonium cyanate.A methaneB ethylene✓ ureaD acetic acidAnswerCorrect option: C. urea ureaView full question & answer→
MCQ 131 MarkMethane isA C2H6B C3H8C CH2✓ CH4AnswerCorrect option: D. CH4 CH4View full question & answer→
MCQ 141 MarkCovalent compounds haveA high melting point✓ low melting pointC moderate melting pointD very high melting pointAnswerCorrect option: B. low melting point low melting pointView full question & answer→
MCQ 151 MarkWeight of Kohinoor Diamond was✓ 186 caratsB 27 caratsC 252 caratsD 23 caratsAnswerCorrect option: A. 186 carats 186 caratsView full question & answer→
MCQ 161 MarkEthane with molecular formula C2H6 has covalent bonds.A six✓ sevenC eightD nineAnswerCorrect option: B. seven sevenView full question & answer→
MCQ 171 MarkOn heating a mixture of hydrogen and carbon monoxide gases at 300°C in the presence of nickel (catalyst) is formed.A carbon dioxide gasB oxygen gas✓ methane gasD ethylene gasAnswerCorrect option: C. methane gas methane gasView full question & answer→
MCQ 181 MarkMolecular mass of carbon dioxide isA28B22C56✓44AnswerCorrect option: D. 4444View full question & answer→
MCQ 191 MarkMolecular formula of ethane isA C3H4B C2H4✓ C2H6D C2H2AnswerCorrect option: C. C2H6 C2H6View full question & answer→
MCQ 201 MarkElectronic configuration of carbon isA (2, 2)✓ (2,4)C (2, 5,4)D (2, 6)AnswerCorrect option: B. (2,4) 2, 4View full question & answer→
MCQ 211 MarkExhaled air contains about CO2.✓0.04B0.03C0.05D0.06AnswerCorrect option: A. 0.040.04View full question & answer→
MCQ 221 Markis used to remove caffeine from coffee.A liquefied O2B liquefied N2✓ liquefied CO2D liquefied CH4AnswerCorrect option: C. liquefied CO2 Liquified CO2View full question & answer→
MCQ 231 MarkMethanogenic bacteria act on the organic acids to produceA oxygen gasB nitrogen gas✓ methane gasD carbon dioxide gasAnswerCorrect option: C. methane gas Methane gasView full question & answer→
MCQ 241 MarkCarbon has 4 valence electrons in its outermost shell, hence, it isA divalent✓ tetravalentC trivalentD pentavalentAnswerCorrect option: B. tetravalent tetravalentView full question & answer→
MCQ 251 MarkIn saturated hydrocarbons, two carbon atoms are linked byA double bondB triple bondC multiple bond✓ single bondAnswerCorrect option: D. single bond single bondView full question & answer→
MCQ 261 MarkThe number of valence electrons in carbon is✓4B5C6D3AnswerCorrect option: A. 44View full question & answer→
MCQ 271 MarkMethane is also called asA maha gasB mar’s gasC Anthracite✓ marsh gasAnswerCorrect option: D. marsh gas Marsh gasView full question & answer→
MCQ 281 MarkCovalent compounds are generally soluble in solvents.A inorganic✓ organicC mixedD mineralAnswerCorrect option: B. organic organicView full question & answer→
MCQ 291 MarkThe organic compound having double or triple bond in them is termed as✓unsaturated hydrocarbonBinorganicCsaturatedDcompleteAnswerCorrect option: A. unsaturated hydrocarbonUnsaturated hydrocarbonView full question & answer→