Chemistry - Mock Test 43

Question 421

Phenolphthalein in acidic solution is?

A) pink colored B) colorless C) yellow colored D) orange colored

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Question 422

Preservatives are used to preserve?

A) food B) acids C) bases D) water

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Question 423

When acid reacts with metal carbonate, products are?

A) salt B) water C) carbon dioxide D) all of above

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Question 424

By which number the quality of gasoline’ sample is determined?

A) By its octane number B) By its propane number C) By its Electron number D) By its proton number

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Question 425

Which gas is mostly produced along with salt when acid reacts with metals?

A) Oxygen B) Hydrogen C) Carbon Monoxide D) Carbon Dioxide

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Question 426

Which of the following acid is found vinegar in ?

A) Hydrochloric acid B) Acetic acid C) Oxalic acid D) Citric acid

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Question 427

In dry cell, which of the following are used as electrolytes?

A) Ammonium chloride & Zinc chloride B) Sodium chloride & Zinc chloride C) Magnesium chloride & Zinc chloride D) Ammonium chloride & Calcium chloride

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Question 428

Gastric Juice is ?

A) Acidic B) Neutral C) Alkaline D) None of these

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Question 429

The chemical element which identifies the protein is?

A) Sulphur B) Potassium C) Nitrogen D) Phosphorous

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Question 430

Which pollutant in water causes ‘Blue baby syndrome’?

A) Sulphates B) Fluoride C) Nitrates D) Benzene

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