Open Formula and Condensed Formula

Q.

Write the general formula for aldehyde.

Q.

What is the difference between alkyl and aryl?

Q. (a) What is an alkyl group?
(b) Give the name of any three alkyl radicals. How are they formed? [3 MARKS]

Q. while naming a carbon compound, which is named first - the alkyl group or functional group such as halogens.

Q. Question 5 (a)
Draw the electron dot structure for ethanoic acid.

Q. Isobutyl group is a ________ alkyl group.

1. primary
2. secondary
3. tertiary
4. functional

Q.

1. $C{H}_{3}COOH$
2. $HCHO$
3. $H_{3}COH$
4. $HCOOH$

Q. Condensed formula of pentene is

1. ${\mathrm{CH}}_2=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_2{\mathrm{CH}}_3$
2. ${\mathrm{CH}}_2={\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$
3. ${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_2{\mathrm{CH}}_3$
4. ${\mathrm{CH}}_2=\mathrm{CH}{\left({\mathrm{CH}}_2\right)}_2{\mathrm{CH}}_2{\mathrm{CH}}_3$

Q. Match the elements of List I to their respective general condensed formula in List II.

Q. The functional group in an alcohol is known as a 1 group. In ethers, the oxygen is attached to two 2 groups. The functional group in aldehydes and ketones is a 3 group. In aldehydes, the functional group is attached to at least one 4 atom. The heteroatom in an amine is a 5 atom. The functional group of carboxylic acid is a 6 group. In esters, a hydrocarbon group replaces a 7 in the carboxylic acid, whereas in amides an amine group replaces the 8 group of the acid.

Q.

(a) In organic compounds, which part largely determines the physical and chemical properties.
(b) Write the chemical equation to represent the reaction of ethanol with acidified solution of potassium dichromate.

Q. Define a functional group and give the structural formula of the following:
alcohols

Q. What is an alkyl group?

Q. The condensed formula of propene is:

1. $H_{3}C-C{H}_2-C{H}_3$
2. $H_{2}C-C{H}_3-C{H}_3$
3. $H_{3}C-CH=C{H}_2$
4. $H_{2}C-C{H}_3-C{H}_2$

Q. Give the condensed and bond line structural formulae and identify the functional group(s) present, if any, for:
a. $2,2,4-Trimethylpentane$
b. $2-Hydroxy-1,2,3-propanetricarboxylicacid$
c. Hexanedial.

Q. How many electron pairs are shared between carbon and hydrogen atoms in methane?

1. Two
2. Six
3. Eight
4. Four

Q. Alkyl group is:

1. ethyl
2. ethane
3. ethyne
4. none of these

Q. Find the relation between given pair.

Q. Give the common name and IUPAC name of $C_2{H}_{5}OH$.

Q. Give the name and structural formula of an alkyl group.

Q. Which one of the following formulae does not represent an organic compound?

1. $C_4{H}_{10}{O}_4$
2. $C_4{H}_8{O}_4$
3. $C_4{H}_{7}Cl{O}_4$
4. $C_4{H}_9{O}_4$

Q. General formula of alkenes and alkyl radicals are respectively:

1. $C_n{H}_{2n}$ and $C_n{H}_{2n+1}$
2. $C_n{H}_{2n-1}$ and $C_n{H}_{2n}$
3. $C_n{H}_{2n+1}$ and $C_n{H}_{2n+2}$
4. $C_n{H}_{2n}$ and $C_n{H}_{2n+2}$

Q. The compound ${CH}_{3}COO{C}_2{H}_5$ belongs to the class_____

1. alkanals
2. alkanones
3. alkyl alkanoates
4. alkanediols

Q. How many electrons are present in one single bond formed between two atoms?

1. One
2. Two
3. Four
4. Six

Q. The functional group of carboxylic acid is:

1. $-OH$
2. $-CHO$
3. $>C=O$
4. $-COOH$