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Lakhmir Singh & Manjit Kaur - Chemistry

Very Short Answer Type Questions-Pg-220

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Short Answer Type Questions-Pg-221

22 A 22 B 22 C 23 A 23 B 24 A 24 B 25 A 25 B 25 C 26 A 26 B 27 A 27 B 28 A 28 B 28 C 29 30 A 30 B 31 A 31 B 32 A 32 B 32 C 33 A 33 B 34 A 34 B 35 A 35 B 35 C 35 D

Long Answer Type Questions-Pg-222

36 A 36 B 36 C 36 D 37 A 37 B 37 C 37 D 38 A 38 B 38 C 38 D 39 A 39 B 39 C 39 D 39 E

Multiple Choice Questions (MCQs)-Pg-223

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Questions Based on High Order Thinking Skills (HOTS)-Pg-224

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Very Short Answer Type Questions-Pg-239

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Short Answer Type Questions-Pg-240

26 26 26 C 27 28 A 28 B 28 C 29 A 29 B 29 C 30 A 30 B 30 C 31 A 31 B 31 C 32 A 32 B 32 C 33 A 33 B 33 C 34 A 34 B 34 C 35 A 35 B 35 C 36 A 36 B 36 C 37 A 37 B 37 C

Long Answer Type Questions-Pg-241

38 A 38 B 38 C 38 D 38 E 39 A 39 B 39 C 39 D 39 E 40 A 40 B 40 C 40 D 40 E

Multiple Choice Questions (MCQs)-Pg-242

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Questions Based on High Order Thinking Skills (HOTS)-Pg-243

Very Short Answer Type Questions-Pg-262

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Short Answer Type Questions-Pg-263

22 23 24 A 24 B 24 C 25 A 25 B 25 C 26 A 26 B 26 C 27 28 29 A 29 B 30 31 A 31 B 31 C 32 A 32 B 32 C 32 D 33 A 33 B 34 A 34 B 35 A 35 B 35 C 36 A 36 B 36 C 37 A 37 B 37 C 38 A 38 B 38 C 39 A 39 B 39 C 40 A 40 B 41 A 41 B 41 C 42 A 42 B 42 C 43 A 43 B 43 C 44 A 44 B 44 C 45 A 45 B 45 C

Long Answer Type Questions-Pg-265

46 A 46 B 47 A 47 B 48 A 48 B 48 C 49 A 49 B 49 C

Multiple Choice Questions (MCQs)-Pg-265

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Questions Based on High Order Thinking Skills (HOTS)-Pg-266

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Q. 595.0( 3 Votes )

The number of carbon atoms joined in a spherical molecule of buckministerfullerence is: A. fifty B. sixty
C. seventy
D. ninety

Class 10th Lakhmir Singh & Manjit Kaur - Chemistry 4. Carbon and Its Compounds

Answer :

Buckminsterfullerene is an allotrope of carbon that was discovered in 1985 containing clusters of 60 carbon atoms joined together to form spherical molecules.

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PREVIOUSThe number of isomers formed by the hydrocarbon with molecular formula C5H12 is:NEXTA solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads. (a) What is element X? (b) Name the allotrope Y? (c) State whether allotrope Y is a good conductor or non-conductor of electricity. (d) Name one use of allotrope Y (other than lubrication and pencil leads) (e) Name two other allotropes of element X.

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RELATED QUESTIONS :

Give a reason why carbon can neither form C^{4 +} cations nor C^4— anxious, but forms covalent compounds which are bad conductors of electricity and have low melting and boiling points.

Xam idea - Science

(i) Name the bond formed when X₇¹⁴ combines with Y₉¹⁸ .

(ii) Write the chemical formula of the compound formed when X₇¹⁴ combines with Y₉¹⁸ .

All In One Science

What type of bond is present in F₂?

All In One Science

An element E exist in three allotrope forms A, B and C. in allotrope A, the atoms of element E are joined to form a sheet like structure. In allotrope B, each atom of element E is surrounded by four other E atoms to form a rigid structure.

(a) Name the element E.

(b) What is allotrope A?

(c) What is allotrope B?

(d) What is allotrope C?

(e) Which allotrope is used in making jewellery?

(f) Which allotrope is used in making anode of a dry cell?

Lakhmir Singh & Manjit Kaur - Chemistry

The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilized by plants in photosynthesis. An allotrope C of this element is used in glass cutters.

(a) What is element A?

(b) What is the gas B?

(c) Name the allotrope C.

(d) State another use of allotrope C (other than in glass cutters)

(e) Name another allotrope of element A which exists as spherical molecules.

(f) Name a yet another allotrope of element A which conducts electricity.

Lakhmir Singh & Manjit Kaur - Chemistry

What are hydrocarbons? Give examples.

NCERT - Science Exemplar

State the reason why carbon can neither form C⁴⁺ cations nor C^4- anions, but forms covalent compounds. Also state reasons to explain why covalent compounds:

(a) are bad conductors of electricity?

(b) have low melting and boiling points?

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Unsaturated hydrocarbons contain multiple bonds between the two C atoms and show addition reactions. Give the test to distinguish ethane from ethene.

NCERT - Science Exemplar

Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.

NCERT - Science Exemplar

The heteroatoms present in CH₃ — CH₂ — O — CH₂ — CH₂Cl are

(i) oxygen

(ii) carbon

(iii) hydrogen

(iv) chlorine

NCERT - Science Exemplar