Question # 1

Successive discounts of 10% and 20% are equivalent to a single discount of:

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28%

30%

15%

72%

Which one of the following is the formula for baking soda

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Na₂CO₃

NaHCO₃

NaOH

HCI

The pH of human blood is between:

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6.5

7.4

8.9

4.5

Minority carrier in P-type semiconductor is -

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Free electrons

Free holes

Holes and electrons both

Hole minus electron

The pancreas produces enzymes which digest which of the following?

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Fats

Proteins

Carbohydrates

all of these

What type of device is a computer mouse?

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Output

Input

Board

Division

Exbiology deals with the study of life or possibilities of life beyond the earth what is Floriculture?

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Study of flower yielding plants

Study of female reproductive organ

Teaching by Pictures and models

Silk industry (Culture of silk)

Which element is found in potassium chlorate and zinc nitrate?

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Hydrogen

Oxygen

Potassium

zinc

What is the main constituent of coal gas?

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O₂

H₂O

N₂

CH₄

Mole is unit of

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Amount of Substance

Length

Distance in Navigation

Work

Silver were turns black after a period of time due of formation of

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Nitrate coating on silver

Oxide coating on silver

Chloride coating on silver

Sulphide coating on silver

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