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Question Bank Solutions for SSC (Marathi Semi-English) 9th Standard [इयत्ता ९ वी] - Maharashtra State Board - Science and Technology

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Science and Technology
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Complete the following table.

 u (m/s)  a (m/s2)  t (sec)   v = u + at (m/s)
  2       4       3            -
  -       5       2          20
 u (m/s)  a (m/s2)   t (sec)  s = ut + 1/2at2 (m)
5 12 3 -
7 - 4 92
  u (m/s)   a(m/s2)   s (m) v2 = u2 + 2 as (m/s)2
4 - 8
- 5 8.4 10
[0.01] Laws of Motion
Chapter: [0.01] Laws of Motion
Concept: Motion and Rest

Give scientific reason.
Even though the magnitudes of action force and reaction force are equal and their directions are opposite, their effects do not get cancelled.

[0.01] Laws of Motion
Chapter: [0.01] Laws of Motion
Concept: Motion and Rest

Write answer to the following question and explain your answer. 
Explain how the element sodium is monovalent. 

[0.04] Measurement of Matter
Chapter: [0.04] Measurement of Matter
Concept: Laws of Chemical Combination

Identify the odd one out and justify.

Chloride, nitrate, hydride, ammonium 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Hydrogen chloride, sodium hydroxide, calcium oxide, ammonia 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Acetic acid, carbonic acid, hydrochloric acid, nitric acid 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Ammonium chloride, sodium chloride, potassium nitrate, sodium sulphate 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Sodium nitrate, sodium carbonate, sodium sulphate, sodium chloride 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Calcium oxide, magnesium oxide, zinc oxide, sodium oxide.

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Crystalline blue vitriol, crystalline common salt, crystalline ferrous sulphate, crystalline sodium carbonate. 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Identify the odd one out and justify.

Sodium chloride, potassium hydroxide, acetic acid, sodium acetate. 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

State the difference.
Cation and anion 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Explain by drawing a figure of the electronic configuration. 

Formation of sodium chloride from sodium and chlorine. 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Explain by drawing a figure of the electronic configuration. 

Formation of a magnesium chloride from magnesium and chlorine. 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Write down the changes that will be seen in the instance and explain the reason behind it. 

A litmus paper was dropped into 2ml dilute HCl. Then 2ml concentrated NaOH was added to it and stirred. 

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Write down the changes that will be seen in the instance and explain the reason behind it. 

Magnesium oxide was added to dilute HCl and magnesium oxide was a added to dilute NaOH. 

[0.05] Acids, Bases and Salts
Chapter: [0.05] Acids, Bases and Salts
Concept: Electrovalent (or Ionic) Bond

Show the dissociation of the following compound on dissolving in water, with the help of chemical equation and write whether the proportion of dissociation is small or large. 

Sodium chloride

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Show the dissociation of the following compound on dissolving in water, with the help of chemical equation and write whether the proportion of dissociation is small or large. 

Magnesium chloride

[0.14] Substances in Common Use
Chapter: [0.14] Substances in Common Use
Concept: Salts

Distinguish between Weather and climate.

[0.09] Environmental Management
Chapter: [0.09] Environmental Management
Concept: Weather

Explain with suitable examples, the care to be taken when using the methods of transporting patients.

[0.09] Environmental Management
Chapter: [0.09] Environmental Management
Concept: Weather
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