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Carbon and its Compounds

10th Class - CBSE - Chemistry - 1754 Questions - 0 Concepts

Important Questions

Q1 Single Correct Medium
Which of the following homologous series has incorrect  general formula?
  • A. Alkyne $$C_{n}H_{2n-2}$$
  • B. Alkanol $$C_{n}H_{2n+2}O$$
  • C. Alkanal $$C_{n}H_{2n+1}O$$
  • D. Carboxylic acid $$C_{n}H_{2n}O_{2}$$

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Q2 Single Correct Hard
When atoms join together to form chemical bonds without transferring any electrons but rather, by sharing them, they are said to be united by a covalent bond. Which of the following does not have a chemical bond that is covalent?
  • A. Copper sulphide
  • B. Oxygen
  • C. Acetylene
  • D. Wax from petroleum

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Q3 Single Correct Medium
Which of the following not a member of homologues series :
  • A. Ethene
  • B. 1-Butene
  • C. 2-Butene
  • D. 2-Butyne

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Q4 Single Correct Hard
$$Co^{2+}(aq.)+SCN^-(aq)\rightarrow$$ Complex$$\:(X)$$
$$Ni^{2+}(aq)+$$ dimethylglyoxime $$\xrightarrow {NH_4OH}$$ Complex$$\:(Y)$$
The coordination number of cobalt and nickel in both the complexes (X) and (Y) is four. The IUPAC names of the complexes (X) and (Y) are respectively :
  • A. tetrathiocyanato-S-cobalt(II) and bis(dimethylglyoximate)nickel(II)
  • B. tetrathiocyanato-S-cobaltate(II) and bis(dimethylglyoximato)nickelate(II)
  • C. tetrathiocyanato-S-cobaltate(III) and bis(dimethylglyoximato)nickel(II)
  • D. tetrathiocyanato-S-cobaltate(II) and bis(dimethylglyoximato)nickel(II)

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Q5 Single Correct Hard
Which of the following is pair of homologues?
  • A. $${\text{C}}{{\text{H}}_{\text{3}}}{\text{OH,}}\,{\text{C}}{{\text{H}}_{\text{3}}} - {\text{O}} - {\text{C}}{{\text{H}}_3}$$
  • B. $${\text{C}}{{\text{H}}_{\text{3}}}{\text{OH,}}\,{\text{C}}{{\text{H}}_{\text{3}}}{\text{SH}}$$
  • C. $${\text{C}}{{\text{H}}_{\text{3}}} - {\text{O}} - {\text{C}}{{\text{H}}_{\text{3}}},{\text{C}}{{\text{H}}_{\text{3}}} - {\text{C}}{{\text{H}}_{\text{2}}} - {\text{OH}}$$
  • D. $${\text{C}}{{\text{H}}_{\text{3}}}{\text{OH,}}\,{\text{C}}{{\text{H}}_3}{\text{C}}{{\text{H}}_2}{\text{OH}}$$

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Q6 Single Correct Hard
What is the IUPAC name of the following compound?
  • A. 1,2-dimethylcyclopropylcylohexane
  • B. 1,2-dimethylspiro[2.5]octane
  • C. 7,8-dimethylspiro[5.2]octane
  • D. 1,2-dimethylbicyclo[5.2]octane

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Q7 Single Correct Medium
The general molecular formula, which represents the homologous series of alkanols is :
  • A. $$C_{n}H_{2n}O_{2}$$
  • B. $$C_{n}H_{2n}O$$
  • C. $$C_{n}H_{2n+1}O$$
  • D. $$C_{n}H_{2n+2}O$$

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Q8 Single Correct Hard
Which of the following is not correctly matched?
  • A. Dichloridobis(ethane-1, 2-diamine) cobalt(III) ion - $$[Co(Cl)_2(en)_2]^+$$
  • B. Tris(bipyridyl)iron(II)ion - $$[Fe (NH_4C_5C_5H_4N)_3]^{2+}$$
  • C. Ammineaquadibromidocopper(II) - $$[Cu(NH_3)(H_2O)Br_2]$$
  • D. Potassium hexacyanoferrate(II) - $$K_4Fe(CN)_6]$$
  • E. Sodium (ethylenediaminetetraacetato) chromate(II) - $$Na_2[Cr(CH_3COO)_4 (en)]$$

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Q9 Single Correct Hard
Which of the following name formula combinations is not correct?
  • A. $$K[Cr(NH_3)_2Cl_4]$$ - Potassium diamminetetrachlorochromate(III)
  • B. $$[Co (NH_3)_4 (H_2O)I]SO_4$$ - Tetraammineaquaiodocobalt(III) sulphate
  • C. $$K_2 [Pt(CN)_4]$$ - Potassium tetracyanoplatinate(II)
  • D. $$[Mn(CN)_5]^{2-}$$ - Pentacyanomanganate (II) ion

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Q10 Single Correct Hard
Select the correct statement.
  • A. If the critical micelle concentration (CMC) of a soap is $$10^{-3}$$mol/L the $$10^{-4}$$M solution of soap is a colloidal solution.
  • B. Charge of dispersed phase and dispersion medium in a colloidal solution can be identified by electrodialysis process.
  • C. Peptization is defined as the process of converting colloidal sol into precipitate by shaking it with dispersion medium in the small amount of electrolyte
  • D. The emulsion is water in oil (W/O) when some oil soluble dye is added to it and background becomes coloured.

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