Chemistry | TN 11th Standard | TN State Board Online Objective Test

TN State Board TN 11th Standard Chemistry UNIT 12: Basic concept of organic reactions Prepare / Learn

Q2. Which of the following represent a set of nuclephiles?

A. BF₃, H₂O, NH^2-

B. AlCl₃, BF₃, NH₃

C. CN^-, RCH₂^-, ROH

D. H⁺, RNH₃⁺, :CCl₂

Answer : Option C
Explaination / Solution:
No Explaination.

TN State Board TN 11th Standard Chemistry UNIT 1: Basic Concepts of Chemistry and Chemical Calculations Prepare / Learn

Q3. Which one of the following represents 180g of water?

A. 5 Moles of water

B. 90 moles of water

C. (6.022 x 10²³) / 180 molecules of water

D. 6.022x10²⁴ molecules of water

Answer : Option D
Explaination / Solution:

No. of moles of water present in 180 g

= Mass of water / Molar mass of water

= 180 g / 18 g mol^-1 = 10 moles

One mole of water contains

= 6.022 x 10²³ water molecules

10 mole of water contains = 6.022 x 10²³ x 10 = 6.022 x 10²⁴ water molecules

TN State Board TN 11th Standard Chemistry UNIT 13: Hydrocarbons Prepare / Learn

Q4. Major product of the below mentioned reaction is,

A. 2–chloro –1– iodo – 2 – methyl propane

B. 1–chloro–2–iodo–2–methylpropane

C. 1,2 – dichloro – 2 – methyl propane

D. 1, 2 – diiodo – 2 – methyl propane

Answer : Option A
Explaination / Solution:
No Explaination.

TN State Board TN 11th Standard Chemistry UNIT 2: Quantum Mechanical Model of Atom Prepare / Learn

Q5. What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ? n = 3, l = 1 and m = –1

A. 4

B. 6

C. 2

D. = 10

Answer : Option C
Explaination / Solution:

n = 3; l=1; m = -1

either 3p_x or 3p_y

i.e., Maximum two electrons can be accomodated either in 3p_x or in 3p_y

TN State Board TN 11th Standard Chemistry UNIT 14: Haloalkanes and Haloarenes Prepare / Learn

Q6.

Match the compounds given in Column I with suitable items given in Column II

Code

A. A → 2 B → 4 C →1 D →3

B. A → 3 B → 2 C →4 D →1

C. A → 1 B → 2 C →3 D →4

D. A → 3 B → 1 C →4 D →2

Answer : Option D
Explaination / Solution:
No Explaination.

TN State Board TN 11th Standard Chemistry UNIT 3: Periodic Classification Of Elements Prepare / Learn

Q7. The correct order of decreasing electronegativity values among the elements X, Y, Z and A with atomic numbers 4, 8 , 7 and 12 respectively

A. Y > Z > X > A

B. Z > A > Y > X

C. X > Y > Z > A

D. X > Y > A > Z

Answer : Option A
Explaination / Solution:
No Explaination.

TN State Board TN 11th Standard Chemistry UNIT 15: Environmental Chemistry Prepare / Learn

Q8. Match the List I with List II and select the correct answer using the code given below the lists

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

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

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

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

Answer : Option C
Explaination / Solution:
No Explaination.

TN State Board TN 11th Standard Chemistry UNIT 4: Hydrogen Prepare / Learn

Q9. When hydrogen peroxide is shaken with an acidified solution of potassium dichromate in presence of ether, the ethereal layer turns blue due to the formation of

A. Cr₂O₃

B. CrO₄^2–

C. CrO(O₂)₂

D. none of these

Answer : Option C
Explaination / Solution:

Cr₂O₇^2– + 2H⁺ + 4H₂O₂ → 2CrO(O₂)₂ + 5H₂O

TN State Board TN 11th Standard Chemistry UNIT 5: Alkali and Alkaline Earth Metals Prepare / Learn

Q10.

Match the flame colours of the alkali and alkaline earth metal salts in the bunsen burner

(p) Sodium (1) Brick red

(q) Calcium (2) Yellow

(r) Barium (3) Violet

(s) Strontium (4) Apple green

(t) Cesium (5) Crimson red

(u) Potassium (6) Blue

A. p - 2, q - 1, r - 4, s - 5, t - 6, u - 3

B. p - 1, q - 2, r - 4, s - 5, t - 6, u - 3

C. p - 4, q - 1, r - 2, s - 3, t - 5, u - 6

D. p - 6, q - 5, r - 4, s - 3, t - 1, u - 2

Answer : Option A
Explaination / Solution:

(p) sodium –yellow (2)

(q) Calcium – Brick red (1)

(r) Barium – apple green (4)

(s) Strontium – Crimson red (5)

(t) Cesium – blue (6)

(u) Potassium – Violet (3)

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