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Chemistry > Chemical Reactions And Equations > Flashcards

Chemical Reactions And Equations Flashcards

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1
Q

What happens to milk left at room temperature during summer

A

It turn sour

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2
Q

What happens when iron tawa / nail is exposed to humid atmosphere

A

Iron will get rusted

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3
Q

What happens when grapes are fermented

A

Alcohol is formed

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4
Q

What happens when food is cooked

A

Chemical reaction takes place and new chemical is form

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5
Q

Food get digested in our body what happens

A

New chemicals formed in our body

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6
Q

What happens when we respire

A

Food breaks down into glucose

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7
Q

Why magnesium ribbon is cleaned with sandpaper

A

Magnesium ribbon screen with sandpaper because a layer of magnesium oxide is formed on surface

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8
Q

What burns with dazzling

A

Magnesium ribbon burns with dazzling frames

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9
Q

What is burning

A

Reaction with oxygen is called burning

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10
Q

Right reaction between lead nitrate and potassium iodide

A

Lead nitrate plus potassium iodide gives lead iodide and potassium nitrate

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11
Q

What is colour of potassium iodide

A

White

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12
Q

What is colour of lead nitrate

A

White

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13
Q

What is colour of lead iodide

A

Yellow

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14
Q

What is colour of potassium nitrate

A

Transparent white

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15
Q

How can you say a chemical reaction has taken

A

Change in state change in colour evolution of gas change in temperature

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16
Q

What happens when zinc granules react with hydrochloric or sulphuric acid

A
  1. Hydrogen gas is evolved
  2. Temperature is increased
17
Q

Write chemical equation of zinc granules react with sulphuric acid

A

Zn + H2SO4 —> znso4 + H2

18
Q

Write chemical reaction of lead nitrate + potash am iodide gives lead iodide + potassium nitrate

A

Pb(no3)2+ KI—>PbI2+ KNO3

19
Q

What is skeletal chemical equation

A

Unbalanced chemical equation is called skeleton chemical equation

20
Q

Why do we need to balance chemical equations

A

Due to law of conservation of mass the number of atoms are same in reactants as products so an atom is neither created or destroyed in a chemical reaction that’s why we need to balance chemical equations

21
Q

What is chemical formula of rust

A

Fe2o3

22
Q

What is chemical formula of iron dioxide

A

Fe2o4

23
Q

What is chemical formula of barium chloride

A

Bacl2

24
Q

Who is first remember of alcohol family

A

Methanol

Chemistry (1 decks)

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