Question # 1

Which substance is produced by the Haber process?

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Aluminum

Ammonium

Nitric acid

Sulfuric acid

In 1242 A.D., Roger Bacon discovered that black powder (gunpowder) would explode rather than simply burn if he did what?

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Heated it slowly

Confined it in a small space

Place it in a vacuum

Sang 'Over the rainbow'

The element which form amphoteric oxides is:

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Antimony

Bismuth

Sodium

Phosphorous

What type of devices are computer speakers or headphone?

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Input

Output

Both a & b

None of these

Bleach is another useful household chemical, it is often referred to as'' chlorine bleach'', but this is a misnomer, What is the main component of household bleach?

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Sodium chloride

Sodium hydroxide

Hydrochloric acid

Sodium hypochlorite

To convert moving coil galvanometer into an ammeter, which of the following methods is used?

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Small resistance in series

Small resistance in parallel

High resistance in series

High resistance in parallel

If we multiply force by its duration what quantity will we get?

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work

Energy

Impulse

momentum

Which of these is closest to room temperature ( Scientifically speaking)?

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70 F

55 F

60 F

86 F

At what temperature of the Celsius and Fahrenheit scale match?

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-18 degrees

106 degrees

60 degrees

-40 degrees

How many 3 digit numbers can be generated form 1,2,3,4,5,6,7,8,9 such that the digit are in descending order?

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80

81

83

84

Who identified the first white dwarf star?

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Otto Heckmann

Walter Sydney Adams

Riccardo Glacconi

William Huggins

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