(i) cyclohexane
( ii) benzene.
(iii) butane
(iv) isobutene
Q2.The bond between two identical non metallic atom has a pair of electron?
(i)un equally shared between two atoms.
(ii)transferd completely from one atom to another.
(iii)with identical spins
(iv)equally shared between them.
Q3. Covalent compounds are generally
( i)soluble in water
(ii)insoluble in water
(iii)ionize in water
(iv)hydrolyse in water
Q4. Propane with the molecular formula C3H8 has
( i) 7covalent bonds
(ii) 8 covalent bonds
(iii) 9 covalent bonds
( iv) 10 Covalent bonds.
Q5. A hydrocarbon reacts with ammonical cuprous chloride solution to form a red precipitate .The hydrocarbon is
(i) ethane (ii) ethene (iii)butane (iv)1-propyne
Q6.Which of the following substance is added to denature Ethanol ?
( i)methanol
(ii)pyridine
(iii)copper sulphate
(iv)all of them
Q7. Which of the following is not an allotropic form of carbon
(i) fluorine
(ii) fullerene
(iii) diamond
(iv) graphite
Q8.Which of the following represents the correct decreasing order of hydrogen atoms ?
(i) alkanes , alkenes , alkynes
(ii) alkanes , alkaynes , alkenes
(iii) alkenes , alkynes , alkanes
(iv)alkynes , alkanes , alkenes
Q9.Detergents are sodium or potassium salts of long chain of ;-
(i)aldehydes
(ii)ketones
(iii)carboxylic acid
(iv) sulphonic acid
Q10.Which of the following represents the structure of N2 molecule ?
(i) N≡ N
(ii) N = N
(iii) N - N
(iv) None of the above
Q11. In double covalent bond there is sharing of
(i)2electrons
(ii)4 electrons
(iii) 6electrons
(iv) 3electrons
Q12. Cation is formed when
(i) atom gains electrons
(ii) atom loses electrons
(iii) proton is lost by the atom
(iv) atom shared by electrons
Q13. The total no. of electrons that take part in forming a bond in N2 is
(i) 2
(ii) 4
(iii) 6
(iv) 10
Q14.Which of the following has the weakest carbon-carbon strength?
(i)C2H2
(ii)C2H4
(iii)C2H6
(iv)all have the same bond strength
Q15.Which of the following salt when dissolved in water produces hard water.
(i) Calcium sulphate
(ii) Magnesium bicarbonate
(iii) Calcium chloride
(iv) Any of the above
Answer:
Q1. ( ii) benzene Q2. (iv) equally shared between them
Q3. (ii) in soluble in water Q4. (iv) 10 covalent bond
Q5. (iv)1-propyne Q6. (iv) all of them
Q7. (i)fluorine Q8. (i) alkanes , alkenes , alkynes
Q9. (iv) sulphonic acid Q10.(i)N≡N
Q11.(ii) 4 electrons Q12. (ii) atom loses the electrons
Q13. (iii) 6 Q14. (i) C2H2 Q15. (iv) any of the above
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