Nichar konti komposit(কম্পোজিট) konika?

neutrono(নিওট্রোনো)

Chemistry 1st Paper(Chapter Two)

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Quizzes Created: 1 | Total Attempts: 69

Questions: 16 | Attempts: 69 | Updated: Jun 16, 2023

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Questions and Answers

1.

Nichar konti komposit(কম্পোজিট) konika?
- A.
  
  Mason
- B.
  
  Neutrono(নিওট্রোনো)
- C.
  
  Deutaron
- D.
  
  Paiun(পাইওন)
Correct Answer
D. Paiun(পাইওন)
2.

Nirdisto tapmattray(তাপমাত্রায়) 750 mL sompriktto(সম্পৃক্ত) drobona 200 g NaCl drobivuto(দ্রবীভূত) asa. gram akoka NaCl ar drabbota koto?
- A.
  
  266.67 gL^-1
- B.
  
  240.30 gL^-1
- C.
  
  300.67 gL^-1
- D.
  
  150.22 gL^-1
Correct Answer
A. 266.67 gL^-1

Explanation
The concentration of NaCl in the solution can be calculated using the formula:

Concentration (g/L) = Mass of NaCl (g) / Volume of solution (L)

Given that the mass of NaCl is 200 g and the volume of the solution is 750 mL (which is equivalent to 0.75 L), we can substitute these values into the formula:

Concentration (g/L) = 200 g / 0.75 L = 266.67 g/L

Therefore, the correct answer is 266.67 gL-1.

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3.

NH₄⁺ ayon sonakkto(শনাক্ত) korone baborito bikarok(বিকারক) holo____
- A.
  
  AgNO₃ drobon
- B.
  
  BaCl₂ drobon
- C.
  
  Neslar drobon
- D.
  
  NH₄OH drobon
Correct Answer
C. Neslar drobon
4.

Alfa kona bicchuron(বিচ্ছুরন) porikkhay porday(পর্দায়) prolapon(প্রলেপন) thaka konti?
- A.
  
  CuS
- B.
  
  ZnS
- C.
  
  FeS
- D.
  
  NiS
Correct Answer
D. NiS

Explanation
The correct answer is NiS. The question is asking which compound contains the element "prolapon". "Prolapon" is the Bengali word for nickel, so the compound that contains nickel is NiS. CuS, ZnS, and FeS do not contain nickel.

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5.

N=2 , l=1 , m= 1 hola oi orbitalar(অরবিটালের) protik konti?
- A.
  
  2P_x
- B.
  
  2P_y
- C.
  
  2P_z
- D.
  
  2S
Correct Answer
B. 2P_y

Explanation
The quantum numbers given in the question indicate that the electron is in the 2nd energy level (n=2), in the p subshell (l=1), and the m value of 1 indicates that it is in the 2Py orbital. The 2Py orbital is one of the three p orbitals (Px, Py, Pz) in the second energy level.

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6.

Nichar kon orbitalar sokti sorbo nonmo hoba?
- A.
  
  3d
- B.
  
  4s
- C.
  
  4p
- D.
  
  3s
Correct Answer
D. 3s
7.

Kon alor frequency basi hoba?
- A.
  
  X-ray
- B.
  
  UV ray
- C.
  
  IR
- D.
  
  Radio waves
Correct Answer
A. X-ray

Explanation
X-rays have a higher frequency compared to UV rays, IR, and radio waves. X-rays have wavelengths between 0.01 to 10 nanometers, which corresponds to frequencies between 30 petahertz to 30 exahertz. This high frequency allows X-rays to penetrate through the human body and other materials, making them useful in medical imaging and industrial applications.

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8.

A₂B₃ ar drabbota(দ্রাব্যতা) S hola drabbota gunfol koto?
- A.
  
  108 S³
- B.
  
  27 S³
- C.
  
  16 S⁴
- D.
  
  8 S³
Correct Answer
A. 108 S³

Explanation
The given question is asking for the product of two numbers, A2B3 and S hola drabbota. The correct answer is 108 S3. However, without further information or context, it is difficult to provide a specific explanation for this answer. It is possible that the answer is derived from a specific mathematical calculation or formula that is not provided. Without more information, it is not possible to provide a comprehensive explanation.

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9.

Shikha(শিখা) porikkhay sonali-holud shikha sristy kora konti ?
- A.
  
  Na
- B.
  
  K
- C.
  
  Ca
- D.
  
  Cu
Correct Answer
A. Na
10.

3rd(3য়) soktistorar(শক্তিস্তরের) jonno mvr ar man nichar konti?
- A.
  
  Nh/2π
- B.
  
  Nh/6π
- C.
  
  3h/2π
- D.
  
  4h/2π
Correct Answer
C. 3h/2π

Explanation
The correct answer is 3h/2π.

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11.

Select the ones you like
- A.
  
  I & ii
- B.
  
  Ii & iii
- C.
  
  I & iii
- D.
  
  I , ii & iii
Correct Answer
B. Ii & iii

Explanation
The correct answer is "ii & iii" because it suggests that the options "ii" and "iii" are the ones that the person should select.

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12.

Select the ones you like
- A.
  
  I & ii
- B.
  
  I & iii
- C.
  
  Ii & iii
- D.
  
  I , ii & iii
Correct Answer
B. I & iii

Explanation
The correct answer is i & iii. This means that the options i and iii are the ones that should be selected.

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13.

Select the ones you like
- A.
  
  I & ii
- B.
  
  Ii & iii
- C.
  
  I & iii
- D.
  
  I , ii & iii
Correct Answer
D. I , ii & iii

Explanation
The correct answer is "i, ii & iii" because it includes all the options listed, i, ii, and iii.

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14.

Select the ones you like
- A.
  
  I & ii
- B.
  
  Ii & iii
- C.
  
  I & iii
- D.
  
  I , ii & iii
Correct Answer
D. I , ii & iii

Explanation
The correct answer is "i, ii & iii". This means that all of the options i, ii, and iii are correct and should be selected.

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15.

Select the ones you like
- A.
  
  I & iii
- B.
  
  I & ii
- C.
  
  Ii & iii
- D.
  
  I , ii & iii
Correct Answer
A. I & iii

Explanation
The correct answer is "i & iii" because it indicates that the options selected are i and iii. The other options are either missing or do not include the correct combination of choices.

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16.

Select the ones you like
- A.
  
  Option 1
- B.
  
  Option 2
- C.
  
  Option 3
- D.
  
  Option 4
Correct Answer
A. Option 1

Explanation
The correct answer is Option 1 because it suggests that there are multiple options to choose from and the person is required to select the ones they like. The other options do not provide any indication of selecting preferences or choices.

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