Q.1. Solve the following
1) The reaction in which the place of one type of atom/group in a reactant is
taken by another atom/group of atoms is called reaction.
(a) Esterification (b) Addition (c) Substitution (d) Dehydration
2) Write the Common name and IUPAC name of following structural formula.
Η Η
H-C-C-C
CH₂ - CH₂ - CHOR
HH H
O
3) Name the following:-
Three elements having 7 electrons in their outermost shell.
4) State whether the following statement is 'True' or 'False'.
If false, Write the correct statement for the same.
Lithium, Potassium and Sodium are elements forming Dobereiner's
triads.
Q.2. Match the Following:-.
(03)
Column 'A'.
Column 'B'
Column 'C'
(i) Triad.
(a) lightest and negatively charged
1.Mendeleev
(ii) Octave. (b) Concentrate mass & positively charged. 2.Thomson
(iii) Atom number. (c) Average of 1st & 3rd Atomic mass. 3. Newlands
(iv) Period (d) Properties of 8 elements similar to 1st 4.Rutherford
(v) Nucleus. (e) positive charge on the Nucleus.
5.Dobereiner
(vi) Electron. (1) Sequencial change in molecular formula. 6.Moseley
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Answer:
i think Ans for Qno.1 is:Esterification
Answer:
Q1 - The reaction in which the place of one type of atom/group in a reactant is taken by another atom/group of atoms is called reaction.
Answer - c) Substitution
Q.3 - Three elements having 7 electrons in their outermost shell.
Answer - (i) Fluorine (ii) Chlorine (iii) Bromine
Q4 - If false, Write the correct statement for the same.
Lithium, Potassium and Sodium are elements forming Dobereiner's.
Answer - Li- 7 , Na - 23 , k- 39
Q2 - Column 1
Column 2
Column 3
i. Triad
c. Average of the first and the third atomic mass 5. Dobereiner
ii. Octave d. Properties of the eighth element similar to the first
3. Newlands
iii. Atomic number e. The positive charge on the nucleus 1. Mendeleev
iv. Period f. The sequential change in molecular formulae 6. Moseley
v. Nucleus b. Concentrated mass and positive charge
4. Rutherford
vi. Electron a. Lightest and negatively charged particle in all the atoms 2. Thomson