Methods to Form Lyophobic Colloids

Q. intermolecular hydrogen bonds are not present in 1.CH3CH2OH 2.CH3COOH 3.C2H5NH2 4.CH3OCH3

Q. Maximum covalent character is shown by 1.NCl3 2. AsCl3 3. PCl3 4.SbCl3

Q. 17.Rotational angle required to get maximum stable conformer from minimum stable conformer in n butane is 1)360 2)180 3)120 4)240 In deg

Q. 62. most stable conformation of 2-chloroethanol is 1.skew 2.staggered 3.eclipse 4.gauche

Q. Boiling point of inert gas due to (1) Hydrogen bond (2) London force (3) Dipole-dipole attraction (4) Covalent bonds

Q. which is more stable?explain 1.CF2(SINGLET CARBENE) 2.CF2(TRIPLET CARBENE)

Q. Most stable hydrogen bonding present in :- (1) F–H-----F–H (4) F–H------F–

Q. 34.Which of the following molecule is planer? 1)CH4 2)C2H4 3)NH3 4)SiCl4

Q. 61 Indicate the sigma and bond in the following molecules C6H6 , C6H12, CH2=C=CH2

Q. When an excess of $AgN{O}_3$ is treated with $KI$ solution, $AgI$ forms a:

1. positively charged sol
2. negatively charged sol
3. neutral sol
4. true solution

Q. Why proton dependent on gas present discharge tube.

Q. the ratio of sigma bomd and pi bond in tetracynoethylene i

Q.

A strong type of dipole-dipole interaction is:

1. Covalent bond

2. Ionic bond

3. Hydrogen bond

4. Electrostatic bond

Q. What is the molarity of 14V H2O2

Q. 10. What is diborane adducts?

Q. 38.Which liquid have maximum surface tension? (1) H_2O (2) C_6H_6 (3) CH_3OH (4) C_2H_5OH

Q. But 1 yne and but 1 ene can be chemically distinguished by

Q. what volume ofCCl_4 contain 6.02×10^2 CCl_4 molecules

Q. When an excess of $AgN{O}_3$ is treated with $KI$ solution, $AgI$ forms a:

1. positively charged sol
2. negatively charged sol
3. neutral sol
4. true solution

Q. why pent-4-yn-1ene is not resonance stabilised?

Q. which isomer of idopen†an e have lowest b.p

Q. Which of the following statements are true about peptization? A. A colloidal sol is converted into precipitate B. It is done in the presence of a small electrolyte C. Charges develop on the precipitate during this process D. The charges developed during this process further breaks up into smaller particles of the size of colloids.

1. A, B, D
2. A, B, C
3. B, C, D
4. A, B, C, D

Q. how to find the polar molecule in chemical bonding?

Q. Which of the following is not an example of lyophilic colloids?

Q. Which is most stable - Pyrole , Thiophene , Furane ? (With proper explanation)

Q. Which of the following statements are true about peptization? A. A colloidal sol is converted into precipitate B. It is done in the presence of a small electrolyte C. Charges develop on the precipitate during this process D. The charges developed during this process further breaks up into smaller particles of the size of colloids.

1. A, B, D
2. A, B, C
3. B, C, D
4. A, B, C, D

Q. CH4 BF3 NH3 BeCl2 Increasing order of bond angle ? Explain the reason.

Q. Explain resonance in 3chloro prop-1-yne

Q. Method of formation of solution is given in Column I. Match it with the type of solution given in Column II.
Column I Column II
(i) Sulphur vapours passed through cold water (p) Normal electrolyte solution
(ii) Soap mixed with water above critical micelle concentration (q) Multi molecular colloids
critical micelle concentration
(iii) White of egg whipped with water (r) Associated colloid
(iv) Soap mixed with water below (s) Macro molecular colloids
critical micelle concentration

1. i-q, ii-r, iii-s, iv-p
2. i-p, ii-q, iii-r, iv-s
3. i-q, ii-p, iii-s, iv-r
4. i-r, ii-s, iii-q, iv-p

Q. Match the following
$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ & \text{(Method of preparation)}& & \text{(Type of sol)}\\ \text{a}& \text{Electrodispersion}& \text{p}& \text{Mercury sol}\\ \text{b}& \text{Mechanical dispersion}& \text{q}& \text{Hydrosol of gold}\\ \text{c}& \text{Ultrasonic method}& \text{r}& \text{Graphite sol}\\ \text{d}& \text{Peptisation}& \text{s}& \text{AgI sol}\end{array}$

1. $a\to q$; $b\to r$; $c\to p$; $d\to s$
2. $a\to q$; $b\to r$; $c\to s$; $d\to p$
3. $a\to r$; $b\to q$; $c\to p$; $d\to s$
4. $a\to r$; $b\to s$; $c\to p$; $d\to q$