carbon and its compounds

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MCQ Science Class 10
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Science Class 10

Carbon and its compounds

CBSE Board

Teacher Name : Rakesh
Total Questions : 23
Time Allowed : 60
Total Marks : 23

Q 1 :The first member of alkyne homologous
- methane
- ethene
- ethyne
- propyne
Q 2 :How many electrons are there in the outermost shell of carbon?
- 1
- 2
- 3
- 4
Q 3 :Which allotrope of carbon is in the form of the geodesic dome?
- Fullerene
- Graphite
- Diamond
- Carbon nano-tube
Q 4 :Pentane has the molecular formula C5H12. It has
- 16 covalent bonds
- 5 covalent bonds
- 17 covalent bonds
- 12 covalent bonds
Q 5 :Which of the following has a double bond?
- Nitrogen molecule
- Methane molecule
- Oxygen molecule
- Hydrogen molecule
Q 6 :Carbon exists in the atmosphere in the form of
- coal
- carbon monoxide only
- carbon dioxide only
- carbon monoxide in traces and carbon dioxide
Q 7 :Covalent compounds
- have high melting and boiling points
- are formed between atoms of metals and non-metals
- are mostly soluble in water
- are formed by the sharing of electrons among the bonding atoms
Q 8 :C3H8 belongs to the homologous series of
- alkynes
- alkanes
- cyclo-alkanes
- alkenes
Q 9 :Buckminsterfullerene is an allotropic form of
- sulphur
- tin
- phosphorus
- carbon
Q 10 :Which of the following is not a pair of the same homologous series?
- CH3 CH2OH , CH3CH2CI
- CH3CH3, CH4
- CH3CH2COOH, CH3COOH
- C2H4, C3H6
Q 11 :A hydrocarbon has four carbon atoms. Its molecular formula if it is an alkene is
- C4H8
- C4H10
- C4H4
- C4H6
Q 12 :A Functional group in a molecule mainly determines the
- chemical properties
- physical properties
- both
- none of these
Q 13 :In diamond, each carbon atom is bonded to four other carbon atoms to form
- a hexagonal array
- a structure in the shape of a football
- a rigid three- dimensional structure
- a strcture of a ring
Q 14 :The property by which a large number of atoms of the same element get linked through covalent bonds forming long chains is called
- catenation
- polymerisation
- allotropy
- addition
Q 15 :Cation is formed when
- an atom gain electrons
- an atom loses electrons
- a proton is lost by the atom
- a atom shares electrons
Q 16 :Which of the following is the molecular formula of cyclobutane?
- C4H10
- C4H6
- C4H8
- C4H4
Q 17 :How many number of carbon atoms are joined ina a spherical molecule of buckminsterfullerene?
- 30
- 60
- 90
- 120
Q 18 :The self- linkage property is maximum in
- silicon
- sulphur
- carbon
- phosphorus
Q 19 :Which of the following is the major constituent of the liquefied petroleum gas?
- methane
- ethene
- propane
- butane
Q 20 :Which of the following statements about graphite and diamond is true?
- They have the same crystal structure.
- They can undergo the same chemical reactions.
- They have the same degree of hardness.
- They have the same electrical conductitvity.
Q 21 :Select an alkene from the following
- C5H10
- C4H10
- C6H10
- C6H8
Q 22 :Which of the following compounds is not a hydrocarbon?
- R-CH3
- RCH=CH2
- RCH2OH
- CH3CH=CH2
Q 23 :While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
- The fuel is not burning completely
- the fuel is wet
- the food is not cooked completely
- the fuel is burning completely

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