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Carbon and its Compounds

Why detergents are better cleansing agents than soaps? Explain.

06/11/2024

Science

10th

Carbon and its Compounds

A compound X is formed by the reaction of a carboxylic acidC2H4O2 and an alcohol in presence of a few drops of H2SO4. The alcohol on oxidation with alkaline KMnO4 followed by acidification gives the same carboxylic acid as used in this reaction. Give the names and structures of (a) carboxylic acid, (b) alcohol and (c) the compound X. Also write the reaction.

06/11/2024

Science

10th

Carbon and its Compounds

Draw the electron dot structure of ethyne and also draw its structural formula

06/11/2024

Science

10th

Carbon and its Compounds

The first member of alkyne homologous series is
(a) ethyne
(b) ethene
(c) propyne
(d) methane

06/11/2024

Science

10th

Carbon and its Compounds

The heteroatoms present in
CH3—CH2—O—CH2—CH2Cl are
(i) oxygen
(ii) carbon
(iii) hydrogen
(iv) chlorine
(a) (i) and (ii) (b) (ii) and (iii)
(c) (iii) and (iv) (d) (i) and (iv)

06/11/2024

Science

10th

Carbon and its Compounds

The name of the compound CH3 — CH2 — CHO is
(a) Propanal
(b) Propanone
(c) Ethanol
(d) Ethanal

06/11/2024

Science

10th

Carbon and its Compounds

Which of the following does not belong to the same homologous series?
(a) CH4
(b) C2H6
(c) C3H8
(d) C4H8

06/11/2024

Science

10th

Carbon and its Compounds

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
(a) helium
(b) neon
(c) argon
(d) krypton

06/11/2024

Science

10th

Carbon and its Compounds

Mineral acids are stronger acids than carboxylic acids because
(i) mineral acids are completely ionised
(ii) carboxylic acids are completely ionised
(iii) mineral acids are partially ionised
(iv) carboxylic acids are partially ionised
(a) (i) and (iv) (b) (ii) and (iii)
(c) (i) and (ii) (d) (iii) and (iv)

06/11/2024

Science

10th

Carbon and its Compounds

Vinegar is a solution of
(a) 50% – 60% acetic acid in alcohol
(b) 5% – 8% acetic acid in alcohol
(c) 5% – 8% acetic acid in water
(d) 50% – 60% acetic acid in water

06/11/2024

Science

10th