Carbon and its Compounds

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Carbon and its Compounds - 09 (Special)

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Q1. While cooking, if the bottom of the vessel is getting blackened on the outside, it means that *

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The fuel is not burning completely

The fuel is burning completely

The fuel is wet

The food is not cooked completely

Q2. Cation is formed when *

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Atom shares electrons

Atom gains electrons

Atom loses electrons

Proton is lost by the atom

Q3. From which of the following substance pencil lead is formed? *

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Lead

Graphite

Wood

Charcoal

Q4. The I.U.P.A.C name of CH3CH2CH=CHCH3 is *

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3-Butene

But-1-ene

Pent-2-ene

Pent-3-ene

Q5. What is denatured alcohol? *

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Methyl alcohol which has been made unfit for drinking purpose by adding small amount of poisonous substance

Ethyl alcohol which has been made unfit for drinking purpose by adding small amount of poisonous substance

Ethyl alcohol containing 60% of water by weight

Alcohol having properties of an acid

Q6. In which of the following compounds -OH is the functional group? *

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Butanal

Butanone

Butanoic

Butanol

Q7. Structural formula of ethyne is *

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C2H4

C3H3

C2H2

C2H6

Q8. Chlorine reacts with saturated hydrocarbons at room temperature in the *

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absence of sunlight

presence of water

presence of sunlight

presence of hydrochloric acid

Q9. Ethanol reacts with sodium and forms two products. These are *

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Sodium ethanoate and oxygen

Sodium ethoxide and oxygen

Sodium ethoxide and hydrogen

Sodium ethanoate and hydrogen

Q10. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of *

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Neon

Helium

Argon

Krypton

Q11. Carbon exists in the atmosphere in the form of *

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Coal

Only carbon dioxide

Only carbon monoxide

Carbon monoxide in traces and carbon dioxide

Q12. A molecule of methane (CH4) has *

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Only triple bonds

Two double bonds and one single bond

Only single bonds

Only double bonds

Q13. The isomeric pair is *

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ethane and propane

butane and 2-methyl propane

propane and butane

ethane and ethane

Q14. Which is denatured spirit? *

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ethanol and methanol (5%)

methanol only

ethanol only

ethanol and methanol (50%)

Q15. Covalent compounds *

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have high melting and boiling point

are formed by the sharing of electrons in the bonding atoms.

are mostly soluble in water

are formed between atoms of metals and non-metals

Q16. C3H8 belongs to the homologous series of *

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Alkanes

Cyclo alkanes

Alkenes

Alkynes

Q17. The number of isomers of pentane are *

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Q18. The I.U.P.A.C name of CH3CH2CH=CH2 is *

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Butyne

Prop-1-ene

But-1-ene

3-Butene

Q19. Which of the following compounds of carbon does not consist of ions? *

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Ca2C

NaHCO3

CaCO3

CHCl3

Q20. The property of self-linkage among identical atoms to form long chain compounds is known as *

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Isomerisation

Halogenation

Superposition

Catenation

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